Destroy now requires that all data has been previously removed.

Added new flag "-R" to command line to perform an automatic removal.
This should be the last of the ways in which a single command could
block the nilmdb thread for a long time.

.gitignore

@@ -8,11 +8,9 @@ docs/*.html
 build/
 *.pyc
 nilmdb/server/interval.c
-nilmdb/server/interval.so
 nilmdb/server/layout.c
-nilmdb/server/layout.so
 nilmdb/server/rbtree.c
-nilmdb/server/rbtree.so
+*.so
 
 # Setup junk
 dist/

Makefile

@@ -14,6 +14,9 @@ sdist:
 install:
 	python setup.py install
 
+develop:
+	python setup.py develop
+
 docs:
 	make -C docs
 
@@ -23,6 +26,7 @@ lint:
 test:
 ifeq ($(INSIDE_EMACS), t)
 # Use the slightly more flexible script
+	python setup.py build_ext --inplace
 	python tests/runtests.py
 else
 # Let setup.py check dependencies, build stuff, and run the test
@@ -39,4 +43,4 @@ clean::
 gitclean::
 	git clean -dXf
 
-.PHONY: all version build dist sdist install docs lint test clean
+.PHONY: all version build dist sdist install docs lint test clean gitclean

docs/design.md

@@ -140,7 +140,7 @@ Speed
 
 - Next slowdown target is nilmdb.layout.Parser.parse().
     - Rewrote parsers using cython and sscanf
-    - Stats (rev 10831), with _add_interval disabled
+    - Stats (rev 10831), with `_add_interval` disabled
 
         layout.pyx.Parser.parse:128        6303 sec, 262k calls
          layout.pyx.parse:63               13913 sec, 5.1g calls
@@ -186,6 +186,19 @@ IntervalSet speed
     - rbtree and interval converted to cython:
       8.4 μS, total 12 s, 134 MB RAM
 
+- Would like to move Interval itself back to Python so other
+  non-cythonized code like client code can use it more easily.
+  Testing speed with just `test_interval` being tested, with
+  `range(5,22)`, using `/usr/bin/time -v python tests/runtests.py`,
+  times recorded for 2097152:
+    - 52ae397 (Interval in cython):
+	  12.6133 μs each, ratio 0.866533, total 47 sec, 399 MB RAM
+	- 9759dcf (Interval in python):
+	  21.2937 μs each, ratio 1.462870, total 83 sec, 1107 MB RAM
+  That's a huge difference!  Instead, will keep Interval and DBInterval
+  cythonized inside nilmdb, and just have an additional copy in
+  nilmdb.utils for clients to use.
+
 Layouts
 -------
 Current/old design has specific layouts: RawData, PrepData, RawNotchedData.
@@ -266,3 +279,113 @@ Each table contains:
   from the end of the file will not shorten it; it will only be
   deleted when it has been fully filled and all of the data has been
   subsequently removed.
+
+
+Rocket
+------
+
+Original design had the nilmdb.nilmdb thread (through bulkdata)
+convert from on-disk layout to a Python list, and then the
+nilmdb.server thread (from cherrypy) converts to ASCII.  For at least
+the extraction side of things, it's easy to pass the bulkdata a layout
+name instead, and have it convert directly from on-disk to ASCII
+format, because this conversion can then be shoved into a C module.
+This module, which provides a means for converting directly from
+on-disk format to ASCII or Python lists, is the "rocket" interface.
+Python is still used to manage the files and figure out where the
+data should go; rocket just puts binary data directly in or out of
+those files at specified locations.
+
+Before rocket, testing speed with uint16_6 data, with an end-to-end
+test (extracting data with nilmtool):
+
+- insert: 65 klines/sec
+- extract: 120 klines/sec
+
+After switching to the rocket design, but using the Python version
+(pyrocket):
+
+- insert: 57 klines/sec
+- extract: 120 klines/sec
+
+After switching to a C extension module (rocket.c)
+
+- insert: 74 klines/sec through insert.py; 99.6 klines/sec through nilmtool
+- extract: 335 klines/sec
+
+After client block updates (described below):
+
+- insert: 180 klines/sec through nilmtool (pre-timestamped)
+- extract: 390 klines/sec through nilmtool
+
+Using "insert --timestamp" or "extract --bare" cuts the speed in half.
+
+Blocks versus lines
+-------------------
+
+Generally want to avoid parsing the bulk of the data as lines if
+possible, and transfer things in bigger blocks at once.
+
+Current places where we use lines:
+
+- All data returned by `client.stream_extract`, since it comes from
+  `httpclient.get_gen`, which iterates over lines.  Not sure if this
+  should be changed, because a `nilmtool extract` is just about the
+  same speed as `curl -q .../stream/extract`!
+
+- `client.StreamInserter.insert_iter` and
+  `client.StreamInserter.insert_line`, which should probably get
+  replaced with block versions.  There's no real need to keep
+  updating the timestamp every time we get a new line of data.
+
+  - Finished.  Just a single insert() that takes any length string and
+    does very little processing until it's time to send it to the
+	server.
+
+Timestamps
+----------
+
+Timestamps are currently double-precision floats (64 bit).  Since the
+mantissa is 53-bit, this can only represent about 15-17 significant
+figures, and microsecond Unix timestamps like 1222333444.000111 are
+already 16 significant figures.  Rounding is therefore an issue;
+it's hard to sure that converting from ASCII, then back to ASCII,
+will always give the same result.
+
+Also, if the client provides a floating point value like 1.9999999999,
+we need to be careful that we don't store it as 1.9999999999 but later
+print it as 2.000000, because then round-trips change the data.
+
+Possible solutions:
+
+- When the client provides a floating point value to the server,
+  always round to the 6th decimal digit before verifying & storing.
+  Good for compatibility and simplicity.  But still might have rounding
+  issues, and clients will also need to round when doing their own
+  verification.  Having every piece of code need to know which digit
+  to round at is not ideal.
+
+- Always store int64 timestamps on the server, representing
+  microseconds since epoch.  int64 timestamps are used in all HTTP
+  parameters, in insert/extract ASCII strings, client API, commandline
+  raw timestamps, etc.  Pretty big change.
+
+  This is what we'll go with...
+
+  - Client programs that interpret the timestamps as doubles instead
+    of ints will remain accurate until 2^53 microseconds, or year
+    2255.
+
+  - On insert, maybe it's OK to send floating point microsecond values
+    (1234567890123456.0), just to cope with clients that want to print
+    everything as a double.  Server could try parsing as int64, and if
+    that fails, parse as double and truncate to int64.  However, this
+    wouldn't catch imprecise inputs like "1.23456789012e+15".  But
+    maybe that can just be ignored; it's likely to cause a
+    non-monotonic error at the client.
+
+  - Timestamps like 1234567890.123456 never show up anywhere, except
+    for interfacing to datetime_tz etc.  Command line "raw timestamps"
+    are always printed as int64 values, and a new format
+    "@1234567890123456" is added to the parser for specifying them
+    exactly.

extras/nilmtool-bash-completion.sh

@@ -0,0 +1,20 @@
+# To enable bash completion:
+#
+# 1. Ensure python-argcomplete is installed:
+#       pip install argcomplete
+# 2. Source this file:
+#       . nilmtool-bash-completion.sh
+
+_nilmtool_argcomplete() {
+    local IFS=$(printf "\013")
+    COMPREPLY=( $(IFS="$IFS" \
+                  COMP_LINE="$COMP_LINE" \
+	          COMP_WORDBREAKS="$COMP_WORDBREAKS" \
+                  COMP_POINT="$COMP_POINT" \
+                  _ARGCOMPLETE=1 \
+                  "$1" 8>&1 9>&2 1>/dev/null 2>/dev/null) )
+    if [[ $? != 0 ]]; then
+        unset COMPREPLY
+    fi
+}
+complete -o nospace -F _nilmtool_argcomplete nilmtool

nilmdb/__init__.py

@@ -1,7 +1,9 @@
 """Main NilmDB import"""
 
-from nilmdb.server import NilmDB, Server
+# These aren't imported automatically, because loading the server
-from nilmdb.client import Client
+# stuff isn't always necessary.
+#from nilmdb.server import NilmDB, Server
+#from nilmdb.client import Client
 
 from nilmdb._version import get_versions
 __version__ = get_versions()['version']

nilmdb/client/client.py

@@ -2,27 +2,29 @@
 
 """Class for performing HTTP client requests via libcurl"""
 
-import nilmdb
 import nilmdb.utils
 import nilmdb.client.httpclient
+from nilmdb.client.errors import ClientError
 
 import time
 import simplejson as json
 import contextlib
 
-def float_to_string(f):
+from nilmdb.utils.time import timestamp_to_string, string_to_timestamp
-    """Use repr to maintain full precision in the string output."""
-    return repr(float(f))
 
 def extract_timestamp(line):
     """Extract just the timestamp from a line of data text"""
-    return float(line.split()[0])
+    return string_to_timestamp(line.split()[0])
 
 class Client(object):
     """Main client interface to the Nilm database."""
 
-    def __init__(self, url):
+    def __init__(self, url, post_json = False):
-        self.http = nilmdb.client.httpclient.HTTPClient(url)
+        """Initialize client with given URL.  If post_json is true,
+        POST requests are sent with Content-Type 'application/json'
+        instead of the default 'x-www-form-urlencoded'."""
+        self.http = nilmdb.client.httpclient.HTTPClient(url, post_json)
+        self.post_json = post_json
 
     # __enter__/__exit__ allow this class to be a context manager
     def __enter__(self):
@@ -31,8 +33,11 @@ class Client(object):
     def __exit__(self, exc_type, exc_value, traceback):
         self.close()
 
-    def _json_param(self, data):
+    def _json_post_param(self, data):
         """Return compact json-encoded version of parameter"""
+        if self.post_json:
+            # If we're posting as JSON, we don't need to encode it further here
+            return data
         return json.dumps(data, separators=(',',':'))
 
     def close(self):
@@ -52,14 +57,14 @@ class Client(object):
         as a dictionary."""
         return self.http.get("dbinfo")
 
-    def stream_list(self, path = None, layout = None, extent = False):
+    def stream_list(self, path = None, layout = None, extended = False):
         params = {}
         if path is not None:
             params["path"] = path
         if layout is not None:
             params["layout"] = layout
-        if extent:
+        if extended:
-            params["extent"] = 1
+            params["extended"] = 1
         return self.http.get("stream/list", params)
 
     def stream_get_metadata(self, path, keys = None):
@@ -73,7 +78,7 @@ class Client(object):
         metadata."""
         params = {
             "path": path,
-            "data": self._json_param(data)
+            "data": self._json_post_param(data)
             }
         return self.http.post("stream/set_metadata", params)
 
@@ -81,7 +86,7 @@ class Client(object):
         """Update stream metadata from a dictionary"""
         params = {
             "path": path,
-            "data": self._json_param(data)
+            "data": self._json_post_param(data)
             }
         return self.http.post("stream/update_metadata", params)
 
@@ -92,19 +97,25 @@ class Client(object):
         return self.http.post("stream/create", params)
 
     def stream_destroy(self, path):
-        """Delete stream and its contents"""
+        """Delete stream.  Fails if any data is still present."""
         params = { "path": path }
         return self.http.post("stream/destroy", params)
 
+    def stream_rename(self, oldpath, newpath):
+        """Rename a stream."""
+        params = { "oldpath": oldpath,
+                   "newpath": newpath }
+        return self.http.post("stream/rename", params)
+
     def stream_remove(self, path, start = None, end = None):
         """Remove data from the specified time range"""
         params = {
             "path": path
         }
         if start is not None:
-            params["start"] = float_to_string(start)
+            params["start"] = timestamp_to_string(start)
         if end is not None:
-            params["end"] = float_to_string(end)
+            params["end"] = timestamp_to_string(end)
         return self.http.post("stream/remove", params)
 
     @contextlib.contextmanager
@@ -117,47 +128,47 @@ class Client(object):
 
         Example:
           with client.stream_insert_context('/path', start, end) as ctx:
-            ctx.insert_line('1234567890.0 1 2 3 4\\n')
+            ctx.insert('1234567890.0 1 2 3 4\\n')
-            ctx.insert_line('1234567891.0 1 2 3 4\\n')
+            ctx.insert('1234567891.0 1 2 3 4\\n')
 
         For more details, see help for nilmdb.client.client.StreamInserter
 
         This may make multiple requests to the server, if the data is
         large enough or enough time has passed between insertions.
         """
-        ctx = StreamInserter(self, path, start, end)
+        ctx = StreamInserter(self.http, path, start, end)
         yield ctx
         ctx.finalize()
 
     def stream_insert(self, path, data, start = None, end = None):
-        """Insert rows of data into a stream.  data should be an
+        """Insert rows of data into a stream.  data should be a string
-        iterable object that provides ASCII data that matches the
+        or iterable that provides ASCII data that matches the database
-        database layout for path.  See stream_insert_context for
+        layout for path.  See stream_insert_context for details on the
-        details on the 'start' and 'end' parameters."""
+        'start' and 'end' parameters."""
         with self.stream_insert_context(path, start, end) as ctx:
-            ctx.insert_iter(data)
+            if isinstance(data, basestring):
+                ctx.insert(data)
+            else:
+                for chunk in data:
+                    ctx.insert(chunk)
         return ctx.last_response
 
-    def stream_insert_block(self, path, block, start, end):
+    def stream_intervals(self, path, start = None, end = None, diffpath = None):
-        """Insert an entire block of data into a stream.  Like
-        stream_insert, except 'block' contains multiple lines of ASCII
-        text and is sent in one single chunk."""
-        params = { "path": path,
-                   "start": float_to_string(start),
-                   "end": float_to_string(end) }
-        return self.http.put("stream/insert", block, params)
-
-    def stream_intervals(self, path, start = None, end = None):
         """
         Return a generator that yields each stream interval.
+
+        If diffpath is not None, yields only interval ranges that are
+        present in 'path' but not in 'diffpath'.
         """
         params = {
             "path": path
         }
+        if diffpath is not None:
+            params["diffpath"] = diffpath
         if start is not None:
-            params["start"] = float_to_string(start)
+            params["start"] = timestamp_to_string(start)
         if end is not None:
-            params["end"] = float_to_string(end)
+            params["end"] = timestamp_to_string(end)
         return self.http.get_gen("stream/intervals", params)
 
     def stream_extract(self, path, start = None, end = None, count = False):
@@ -173,9 +184,9 @@ class Client(object):
             "path": path,
         }
         if start is not None:
-            params["start"] = float_to_string(start)
+            params["start"] = timestamp_to_string(start)
         if end is not None:
-            params["end"] = float_to_string(end)
+            params["end"] = timestamp_to_string(end)
         if count:
             params["count"] = 1
         return self.http.get_gen("stream/extract", params)
@@ -195,8 +206,10 @@ class StreamInserter(object):
     The basic data flow is that we are filling a contiguous interval
     on the server, with no gaps, that extends from timestamp 'start'
     to timestamp 'end'.  Data timestamps satisfy 'start <= t < end'.
-    Data is provided by the user one line at a time with
+
-    .insert_line() or .insert_iter().
+    Data is provided to .insert() as ASCII formatted data separated by
+    newlines.  The chunks of data passed to .insert() do not need to
+    match up with the newlines; less or more than one line can be passed.
 
     1. The first inserted line begins a new interval that starts at
     'start'.  If 'start' is not given, it is deduced from the first
@@ -209,7 +222,9 @@ class StreamInserter(object):
     3. The current contiguous interval can be completed by manually
     calling .finalize(), which the context manager will also do
     automatically.  This will send any remaining data to the server,
-    using the 'end' timestamp to end the interval.
+    using the 'end' timestamp to end the interval.  If no 'end'
+    was provided, it is deduced from the last timestamp seen,
+    plus a small delta.
 
     After a .finalize(), inserting new data goes back to step 1.
 
@@ -218,23 +233,18 @@ class StreamInserter(object):
     to change the end time for the interval.
     """
 
-    # See design.md for a discussion of how much data to send.
+    # See design.md for a discussion of how much data to send.  This
-    # These are soft limits -- actual data might be rounded up.
+    # is a soft limit -- we might send up to twice as much or so
-    # We send when we have a certain amount of data queued, or
-    # when a certain amount of time has passed since the last send.
     _max_data = 2 * 1024 * 1024
-    _max_time = 30
+    _max_data_after_send = 64 * 1024
 
-    # Delta to add to the final timestamp, if "end" wasn't given
+    def __init__(self, http, path, start = None, end = None):
-    _end_epsilon = 1e-6
-
-    def __init__(self, client, path, start = None, end = None):
         """'http' is the httpclient object.  'path' is the database
         path to insert to.  'start' and 'end' are used for the first
         contiguous interval."""
         self.last_response = None
 
-        self._client = client
+        self._http = http
         self._path = path
 
         # Start and end for the overall contiguous interval we're
@@ -242,60 +252,37 @@ class StreamInserter(object):
         self._interval_start = start
         self._interval_end = end
 
-        # Data for the specific block we're building up to send
+        # Current data we're building up to send.  Each string
+        # goes into the array, and gets joined all at once.
         self._block_data = []
         self._block_len = 0
-        self._block_start = None
 
-        # Time of last request
+    def insert(self, data):
-        self._last_time = time.time()
+        """Insert a chunk of ASCII formatted data in string form.  The
+        overall data must consist of lines terminated by '\\n'."""
+        length = len(data)
+        maxdata = self._max_data
 
-        # We keep a buffer of the two most recently inserted lines.
+        if length > maxdata:
-        # Only the older one actually gets processed; the newer one
+            # This could make our buffer more than twice what we
-        # is used to "look-ahead" to the next timestamp if we need
+            # wanted to send, so split it up.  This is a bit
-        # to internally split an insertion into two requests.
+            # inefficient, but the user really shouldn't be providing
-        self._line_old = None
+            # this much data at once.
-        self._line_new = None
+            for cut in range(0, length, maxdata):
-
+                self.insert(data[cut:(cut + maxdata)])
-    def insert_iter(self, iter):
-        """Insert all lines of ASCII formatted data from the given
-        iterable.  Lines must be terminated with '\\n'."""
-        for line in iter:
-            self.insert_line(line)
-
-    def insert_line(self, line, allow_intermediate = True):
-        """Insert a single line of ASCII formatted data.  Line
-        must be terminated with '\\n'."""
-        if line and (len(line) < 1 or line[-1] != '\n'):
-            raise ValueError("lines must end in with a newline character")
-
-        # Store this new line, but process the previous (old) one.
-        # This lets us "look ahead" to the next line.
-        self._line_old = self._line_new
-        self._line_new = line
-        if self._line_old is None:
             return
 
-        # If starting a new block, pull out the timestamp if needed.
+        # Append this string to our list
-        if self._block_start is None:
+        self._block_data.append(data)
-            if self._interval_start is not None:
+        self._block_len += length
-                # User provided a start timestamp.  Use it once, then
-                # clear it for the next block.
-                self._block_start = self._interval_start
-                self._interval_start = None
-            else:
-                # Extract timestamp from the first row
-                self._block_start = extract_timestamp(self._line_old)
 
-        # Save the line
+        # Send the block once we have enough data
-        self._block_data.append(self._line_old)
+        if self._block_len >= maxdata:
-        self._block_len += len(self._line_old)
+            self._send_block(final = False)
-
+            if self._block_len >= self._max_data_after_send: # pragma: no cover
-        if allow_intermediate:
+                raise ValueError("too much data left over after trying"
-            # Send an intermediate block to the server if needed.
+                                 " to send intermediate block; is it"
-            elapsed = time.time() - self._last_time
+                                 " missing newlines or malformed?")
-            if (self._block_len > self._max_data) or (elapsed > self._max_time):
-                self._send_block_intermediate()
 
     def update_start(self, start):
         """Update the start time for the next contiguous interval.
@@ -318,63 +305,111 @@ class StreamInserter(object):
 
         If more data is inserted after a finalize(), it will become
         part of a new interval and there may be a gap left in-between."""
-        # Special marker tells insert_line that this is the end
+        self._send_block(final = True)
-        self.insert_line(None, allow_intermediate = False)
 
-        if self._block_len > 0:
+    def _get_first_noncomment(self, block):
-            # We have data pending, so send the final block
+        """Return the (start, end) indices of the first full line in
-            self._send_block_final()
+        block that isn't a comment, or raise IndexError if
-        elif None not in (self._interval_start, self._interval_end):
+        there isn't one."""
-            # We have no data, but enough information to create an
+        start = 0
-            # empty interval.
+        while True:
-            self._block_start = self._interval_start
+            end = block.find('\n', start)
+            if end < 0:
+                raise IndexError
+            if block[start] != '#':
+                return (start, (end + 1))
+            start = end + 1
+
+    def _get_last_noncomment(self, block):
+        """Return the (start, end) indices of the last full line in
+        block[:length] that isn't a comment, or raise IndexError if
+        there isn't one."""
+        end = block.rfind('\n')
+        if end <= 0:
+            raise IndexError
+        while True:
+            start = block.rfind('\n', 0, end)
+            if block[start + 1] != '#':
+                return ((start + 1), end)
+            if start == -1:
+                raise IndexError
+            end = start
+
+    def _send_block(self, final = False):
+        """Send data currently in the block.  The data sent will
+        consist of full lines only, so some might be left over."""
+        # Build the full string to send
+        block = "".join(self._block_data)
+
+        start_ts = self._interval_start
+        if start_ts is None:
+            # Pull start from the first line
+            try:
+                (spos, epos) = self._get_first_noncomment(block)
+                start_ts = extract_timestamp(block[spos:epos])
+            except (ValueError, IndexError):
+                pass # no timestamp is OK, if we have no data
+
+        if final:
+            # For a final block, it must end in a newline, and the
+            # ending timestamp is either the user-provided end,
+            # or the timestamp of the last line plus epsilon.
+            end_ts = self._interval_end
+            try:
+                if block[-1] != '\n':
+                    raise ValueError("final block didn't end with a newline")
+                if end_ts is None:
+                    (spos, epos) = self._get_last_noncomment(block)
+                    end_ts = extract_timestamp(block[spos:epos])
+                    end_ts += nilmdb.utils.time.epsilon
+            except (ValueError, IndexError):
+                pass # no timestamp is OK, if we have no data
+            self._block_data = []
+            self._block_len = 0
+
+            # Next block is completely fresh
             self._interval_start = None
-            self._send_block_final()
-        else:
-            # No data, and no timestamps to use to create an empty
-            # interval.
-            pass
-
-        # Make sure both timestamps are emptied for future intervals.
-        self._interval_start = None
-        self._interval_end = None
-
-    def _send_block_intermediate(self):
-        """Send data, when we still have more data to send.
-        Use the timestamp from the next line, so that the blocks
-        are contiguous."""
-        block_end = extract_timestamp(self._line_new)
-        if self._interval_end is not None and block_end > self._interval_end:
-            # Something's fishy -- the timestamp we found is after
-            # the user's specified end.  Limit it here, and the
-            # server will return an error.
-            block_end = self._interval_end
-        self._send_block(block_end)
-
-    def _send_block_final(self):
-        """Send data, when this is the last block for the interval.
-        There is no next line, so figure out the actual interval end
-        using interval_end or end_epsilon."""
-        if self._interval_end is not None:
-            # Use the user's specified end timestamp
-            block_end = self._interval_end
-            # Clear it in case we send more intervals in the future.
             self._interval_end = None
         else:
-            # Add an epsilon to the last timestamp we saw
+            # An intermediate block, e.g. "line1\nline2\nline3\nline4"
-            block_end = extract_timestamp(self._line_old) + self._end_epsilon
+            # We need to save "line3\nline4" for the next block, and
-        self._send_block(block_end)
+            # use the timestamp from "line3" as the ending timestamp
+            # for this one.
+            try:
+                (spos, epos) = self._get_last_noncomment(block)
+                end_ts = extract_timestamp(block[spos:epos])
+            except (ValueError, IndexError):
+                # If we found no timestamp, give up; we could send this
+                # block later when we have more data.
+                return
+            if spos == 0:
+                # Not enough data to send an intermediate block
+                return
+            if self._interval_end is not None and end_ts > self._interval_end:
+                # User gave us bad endpoints; send it anyway, and let
+                # the server complain so that the error is the same
+                # as if we hadn't done this chunking.
+                end_ts = self._interval_end
+            self._block_data = [ block[spos:] ]
+            self._block_len = (epos - spos)
+            block = block[:spos]
 
-    def _send_block(self, block_end):
+            # Next block continues where this one ended
-        """Send current block to the server"""
+            self._interval_start = end_ts
-        self.last_response = self._client.stream_insert_block(
-            self._path, "".join(self._block_data),
-            self._block_start, block_end)
 
-        # Clear out the block
+        # Double check endpoints
-        self._block_data = []
+        if start_ts is None or end_ts is None:
-        self._block_len = 0
+            # If the block has no non-comment lines, it's OK
-        self._block_start = None
+            try:
+                self._get_first_noncomment(block)
+            except IndexError:
+                return
+            raise ClientError("have data to send, but no start/end times")
 
-        # Note when we sent it
+        # Send it
-        self._last_time = time.time()
+        params = { "path": self._path,
+                   "start": timestamp_to_string(start_ts),
+                   "end": timestamp_to_string(end_ts) }
+        self.last_response = self._http.put("stream/insert", block, params)
+
+        return

nilmdb/client/httpclient.py

@@ -1,6 +1,5 @@
 """HTTP client library"""
 
-import nilmdb
 import nilmdb.utils
 from nilmdb.client.errors import ClientError, ServerError, Error
 
@@ -10,7 +9,7 @@ import requests
 
 class HTTPClient(object):
     """Class to manage and perform HTTP requests from the client"""
-    def __init__(self, baseurl = ""):
+    def __init__(self, baseurl = "", post_json = False):
         """If baseurl is supplied, all other functions that take
         a URL can be given a relative URL instead."""
         # Verify / clean up URL
@@ -26,6 +25,10 @@ class HTTPClient(object):
         # Saved response, so that tests can verify a few things.
         self._last_response = {}
 
+        # Whether to send application/json POST bodies (versus
+        # x-www-form-urlencoded)
+        self.post_json = post_json
+
     def _handle_error(self, url, code, body):
         # Default variables for exception.  We use the entire body as
         # the default message, in case we can't extract it from a JSON
@@ -57,13 +60,14 @@ class HTTPClient(object):
     def close(self):
         self.session.close()
 
-    def _do_req(self, method, url, query_data, body_data, stream):
+    def _do_req(self, method, url, query_data, body_data, stream, headers):
         url = urlparse.urljoin(self.baseurl, url)
         try:
             response = self.session.request(method, url,
                                             params = query_data,
                                             data = body_data,
-                                            stream = stream)
+                                            stream = stream,
+                                            headers = headers)
         except requests.RequestException as e:
             raise ServerError(status = "502 Error", url = url,
                               message = str(e.message))
@@ -77,12 +81,13 @@ class HTTPClient(object):
             return (response, False)
 
     # Normal versions that return data directly
-    def _req(self, method, url, query = None, body = None):
+    def _req(self, method, url, query = None, body = None, headers = None):
         """
         Make a request and return the body data as a string or parsed
         JSON object, or raise an error if it contained an error.
         """
-        (response, isjson) = self._do_req(method, url, query, body, False)
+        (response, isjson) = self._do_req(method, url, query, body,
+                                          stream = False, headers = headers)
         if isjson:
             return json.loads(response.content)
         return response.content
@@ -93,24 +98,31 @@ class HTTPClient(object):
 
     def post(self, url, params = None):
         """Simple POST (parameters in body)"""
-        return self._req("POST", url, None, params)
+        if self.post_json:
+            return self._req("POST", url, None,
+                             json.dumps(params),
+                             { 'Content-type': 'application/json' })
+        else:
+            return self._req("POST", url, None, params)
 
     def put(self, url, data, params = None):
         """Simple PUT (parameters in URL, data in body)"""
         return self._req("PUT", url, params, data)
 
     # Generator versions that return data one line at a time.
-    def _req_gen(self, method, url, query = None, body = None):
+    def _req_gen(self, method, url, query = None, body = None, headers = None):
         """
         Make a request and return a generator that gives back strings
         or JSON decoded lines of the body data, or raise an error if
         it contained an eror.
         """
-        (response, isjson) = self._do_req(method, url, query, body, True)
+        (response, isjson) = self._do_req(method, url, query, body,
-        for line in response.iter_lines():
+                                          stream = True, headers = headers)
-            if isjson:
+        if isjson:
+            for line in response.iter_lines():
                 yield json.loads(line)
-            else:
+        else:
+            for line in response.iter_lines():
                 yield line
 
     def get_gen(self, url, params = None):

nilmdb/cmdline/cmdline.py

@@ -1,6 +1,7 @@
 """Command line client functionality"""
 
-import nilmdb
+import nilmdb.client
+
 from nilmdb.utils.printf import *
 from nilmdb.utils import datetime_tz
 import nilmdb.utils.time
@@ -10,10 +11,16 @@ import os
 import argparse
 from argparse import ArgumentDefaultsHelpFormatter as def_form
 
+try: # pragma: no cover
+    import argcomplete
+except ImportError: # pragma: no cover
+    argcomplete = None
+
 # Valid subcommands.  Defined in separate files just to break
 # things up -- they're still called with Cmdline as self.
 subcommands = [ "help", "info", "create", "list", "metadata",
-                "insert", "extract", "remove", "destroy" ]
+                "insert", "extract", "remove", "destroy",
+                "intervals", "rename" ]
 
 # Import the subcommand modules
 subcmd_mods = {}
@@ -25,6 +32,50 @@ class JimArgumentParser(argparse.ArgumentParser):
         self.print_usage(sys.stderr)
         self.exit(2, sprintf("error: %s\n", message))
 
+class Complete(object): # pragma: no cover
+    # Completion helpers, for using argcomplete (see
+    # extras/nilmtool-bash-completion.sh)
+    def escape(self, s):
+        quote_chars = [ "\\", "\"", "'", " " ]
+        for char in quote_chars:
+            s = s.replace(char, "\\" + char)
+        return s
+
+    def none(self, prefix, parsed_args, **kwargs):
+        return []
+    rate = none
+    time = none
+    url = none
+
+    def path(self, prefix, parsed_args, **kwargs):
+        client = nilmdb.client.Client(parsed_args.url)
+        return ( self.escape(s[0])
+                 for s in client.stream_list()
+                 if s[0].startswith(prefix) )
+
+    def layout(self, prefix, parsed_args, **kwargs):
+        types = [ "int8", "int16", "int32", "int64",
+                  "uint8", "uint16", "uint32", "uint64",
+                  "float32", "float64" ]
+        layouts = []
+        for i in range(1,10):
+            layouts.extend([(t + "_" + str(i)) for t in types])
+        return ( l for l in layouts if l.startswith(prefix) )
+
+    def meta_key(self, prefix, parsed_args, **kwargs):
+        return (kv.split('=')[0] for kv
+                in self.meta_keyval(prefix, parsed_args, **kwargs))
+
+    def meta_keyval(self, prefix, parsed_args, **kwargs):
+        client = nilmdb.client.Client(parsed_args.url)
+        path = parsed_args.path
+        if not path:
+            return []
+        return ( self.escape(k + '=' + v)
+                 for (k,v) in client.stream_get_metadata(path).iteritems()
+                 if k.startswith(prefix) )
+
+
 class Cmdline(object):
 
     def __init__(self, argv = None):
@@ -32,15 +83,17 @@ class Cmdline(object):
         self.client = None
         self.def_url = os.environ.get("NILMDB_URL", "http://localhost:12380")
         self.subcmd = {}
+        self.complete = Complete()
 
     def arg_time(self, toparse):
         """Parse a time string argument"""
         try:
-            return nilmdb.utils.time.parse_time(toparse).totimestamp()
+            return nilmdb.utils.time.parse_time(toparse)
         except ValueError as e:
             raise argparse.ArgumentTypeError(sprintf("%s \"%s\"",
                                                      str(e), toparse))
 
+    # Set up the parser
     def parser_setup(self):
         self.parser = JimArgumentParser(add_help = False,
                                         formatter_class = def_form)
@@ -54,7 +107,8 @@ class Cmdline(object):
         group = self.parser.add_argument_group("Server")
         group.add_argument("-u", "--url", action="store",
                            default=self.def_url,
-                           help="NilmDB server URL (default: %(default)s)")
+                           help="NilmDB server URL (default: %(default)s)"
+                           ).completer = self.complete.url
 
         sub = self.parser.add_subparsers(
             title="Commands", dest="command",
@@ -78,13 +132,15 @@ class Cmdline(object):
 
         # Run parser
         self.parser_setup()
+        if argcomplete: # pragma: no cover
+            argcomplete.autocomplete(self.parser)
         self.args = self.parser.parse_args(self.argv)
 
         # Run arg verify handler if there is one
         if "verify" in self.args:
             self.args.verify(self)
 
-        self.client = nilmdb.Client(self.args.url)
+        self.client = nilmdb.client.Client(self.args.url)
 
         # Make a test connection to make sure things work,
         # unless the particular command requests that we don't.

nilmdb/cmdline/create.py

@@ -1,5 +1,4 @@
 from nilmdb.utils.printf import *
-import nilmdb
 import nilmdb.client
 
 from argparse import RawDescriptionHelpFormatter as raw_form
@@ -23,9 +22,11 @@ Layout types are of the format: type_count
     cmd.set_defaults(handler = cmd_create)
     group = cmd.add_argument_group("Required arguments")
     group.add_argument("path",
-                       help="Path (in database) of new stream, e.g. /foo/bar")
+                       help="Path (in database) of new stream, e.g. /foo/bar",
+                       ).completer = self.complete.path
     group.add_argument("layout",
-                       help="Layout type for new stream, e.g. float32_8")
+                       help="Layout type for new stream, e.g. float32_8",
+                       ).completer = self.complete.layout
     return cmd
 
 def cmd_create(self):

nilmdb/cmdline/destroy.py

@@ -1,5 +1,4 @@
 from nilmdb.utils.printf import *
-import nilmdb
 import nilmdb.client
 
 from argparse import ArgumentDefaultsHelpFormatter as def_form
@@ -8,18 +7,27 @@ def setup(self, sub):
     cmd = sub.add_parser("destroy", help="Delete a stream and all data",
                          formatter_class = def_form,
                          description="""
-                         Destroy the stream at the specified path.  All
+                         Destroy the stream at the specified path.
-                         data and metadata related to the stream is
+                         The stream must be empty.  All metadata
-                         permanently deleted.
+                         related to the stream is permanently deleted.
                          """)
     cmd.set_defaults(handler = cmd_destroy)
+    group = cmd.add_argument_group("Options")
+    group.add_argument("-R", "--remove", action="store_true",
+                       help="Remove all data before destroying stream")
     group = cmd.add_argument_group("Required arguments")
     group.add_argument("path",
-                       help="Path of the stream to delete, e.g. /foo/bar")
+                       help="Path of the stream to delete, e.g. /foo/bar",
+                       ).completer = self.complete.path
     return cmd
 
 def cmd_destroy(self):
     """Destroy stream"""
+    if self.args.remove:
+        try:
+            count = self.client.stream_remove(self.args.path)
+        except nilmdb.client.ClientError as e:
+            self.die("error removing data: %s", str(e))
     try:
         self.client.stream_destroy(self.args.path)
     except nilmdb.client.ClientError as e:

nilmdb/cmdline/extract.py

@@ -12,13 +12,16 @@ def setup(self, sub):
 
     group = cmd.add_argument_group("Data selection")
     group.add_argument("path",
-                       help="Path of stream, e.g. /foo/bar")
+                       help="Path of stream, e.g. /foo/bar",
+                       ).completer = self.complete.path
     group.add_argument("-s", "--start", required=True,
                        metavar="TIME", type=self.arg_time,
-                       help="Starting timestamp (free-form, inclusive)")
+                       help="Starting timestamp (free-form, inclusive)",
+                       ).completer = self.complete.time
     group.add_argument("-e", "--end", required=True,
                        metavar="TIME", type=self.arg_time,
-                       help="Ending timestamp (free-form, noninclusive)")
+                       help="Ending timestamp (free-form, noninclusive)",
+                       ).completer = self.complete.time
 
     group = cmd.add_argument_group("Output format")
     group.add_argument("-b", "--bare", action="store_true",
@@ -44,9 +47,9 @@ def cmd_extract(self):
     layout = streams[0][1]
 
     if self.args.timestamp_raw:
-        time_string = repr
+        time_string = nilmdb.utils.time.timestamp_to_string
     else:
-        time_string = nilmdb.utils.time.format_time
+        time_string = nilmdb.utils.time.timestamp_to_human
 
     if self.args.annotate:
         printf("# path: %s\n", self.args.path)

nilmdb/cmdline/info.py

@@ -1,4 +1,4 @@
-import nilmdb
+import nilmdb.client
 from nilmdb.utils.printf import *
 from nilmdb.utils import human_size
 

nilmdb/cmdline/insert.py

@@ -1,5 +1,4 @@
 from nilmdb.utils.printf import *
-import nilmdb
 import nilmdb.client
 import nilmdb.utils.timestamper as timestamper
 import nilmdb.utils.time
@@ -11,95 +10,122 @@ def setup(self, sub):
                          description="""
                          Insert data into a stream.
                          """)
-    cmd.set_defaults(handler = cmd_insert)
+    cmd.set_defaults(verify = cmd_insert_verify,
+                     handler = cmd_insert)
     cmd.add_argument("-q", "--quiet", action='store_true',
                      help='suppress unnecessary messages')
 
     group = cmd.add_argument_group("Timestamping",
                                    description="""
-                                   If timestamps are already provided in the
+                                   To add timestamps, specify the
-                                   input date, use --none.  Otherwise,
+                                   arguments --timestamp and --rate,
-                                   provide --start, or use --filename to
+                                   and provide a starting time.
-                                   try to deduce timestamps from the file.
-
-                                   Set the TZ environment variable to change
-                                   the default timezone.
                                    """)
 
+    group.add_argument("-t", "--timestamp", action="store_true",
+                       help="Add timestamps to each line")
     group.add_argument("-r", "--rate", type=float,
-                       help="""
+                       help="Data rate, in Hz",
-                       If needed, rate in Hz (required when using --start)
+                       ).completer = self.complete.rate
-                       """)
+
+    group = cmd.add_argument_group("Start time",
+                                   description="""
+                                   Start time may be manually
+                                   specified with --start, or guessed
+                                   from the filenames using
+                                   --filename.  Set the TZ environment
+                                   variable to change the default
+                                   timezone.""")
+
     exc = group.add_mutually_exclusive_group()
     exc.add_argument("-s", "--start",
                      metavar="TIME", type=self.arg_time,
-                     help="Starting timestamp (free-form)")
+                     help="Starting timestamp (free-form)",
+                     ).completer = self.complete.time
     exc.add_argument("-f", "--filename", action="store_true",
-                     help="""
+                     help="Use filename to determine start time")
-                     Use filenames to determine start time
+
-                     (default, if filenames are provided)
+    group = cmd.add_argument_group("End time",
-                     """)
+                                   description="""
-    exc.add_argument("-n", "--none", action="store_true",
+                                   End time for the overall stream.
-                     help="Timestamp is already present, don't add one")
+                                   (required when not using --timestamp).
+                                   Set the TZ environment
+                                   variable to change the default
+                                   timezone.""")
+    group.add_argument("-e", "--end",
+                       metavar="TIME", type=self.arg_time,
+                       help="Ending timestamp (free-form)",
+                       ).completer = self.complete.time
 
     group = cmd.add_argument_group("Required parameters")
     group.add_argument("path",
-                       help="Path of stream, e.g. /foo/bar")
+                       help="Path of stream, e.g. /foo/bar",
-    group.add_argument("file", nargs="*", default=['-'],
+                       ).completer = self.complete.path
-                       help="File(s) to insert (default: - (stdin))")
+    group.add_argument("file", nargs = '?', default='-',
+                       help="File to insert (default: - (stdin))")
     return cmd
 
+def cmd_insert_verify(self):
+    if self.args.timestamp:
+        if not self.args.rate:
+            self.die("error: --rate is needed, but was not specified")
+        if not self.args.filename and self.args.start is None:
+            self.die("error: need --start or --filename when adding timestamps")
+    else:
+        if self.args.start is None or self.args.end is None:
+            self.die("error: when not adding timestamps, --start and "
+                     "--end are required")
+
 def cmd_insert(self):
     # Find requested stream
     streams = self.client.stream_list(self.args.path)
     if len(streams) != 1:
         self.die("error getting stream info for path %s", self.args.path)
 
-    if self.args.start and len(self.args.file) != 1:
+    arg = self.args
-        self.die("error: --start can only be used with one input file")
 
-    for filename in self.args.file:
+    try:
+        filename = arg.file
         if filename == '-':
             infile = sys.stdin
         else:
             try:
-                infile = open(filename, "r")
+                infile = open(filename, "rb")
             except IOError:
                 self.die("error opening input file %s", filename)
 
-        # Build a timestamper for this file
+        if arg.start is None:
-        if self.args.none:
+            try:
-            ts = timestamper.TimestamperNull(infile)
+                arg.start = nilmdb.utils.time.parse_time(filename)
+            except ValueError:
+                self.die("error extracting start time from filename '%s'",
+                         filename)
+
+        if arg.timestamp:
+            data = timestamper.TimestamperRate(infile, arg.start, arg.rate)
         else:
-            if self.args.start:
+            data = iter(lambda: infile.read(1048576), '')
-                start = self.args.start
-            else:
-                try:
-                    start = nilmdb.utils.time.parse_time(filename)
-                except ValueError:
-                    self.die("error extracting time from filename '%s'",
-                             filename)
-
-            if not self.args.rate:
-                self.die("error: --rate is needed, but was not specified")
-            rate = self.args.rate
-
-            ts = timestamper.TimestamperRate(infile, start, rate)
 
         # Print info
-        if not self.args.quiet:
+        if not arg.quiet:
-            printf("Input file: %s\n", filename)
+            printf(" Input file: %s\n", filename)
-            printf("Timestamper: %s\n", str(ts))
+            printf(" Start time: %s\n",
+                   nilmdb.utils.time.timestamp_to_human(arg.start))
+            if arg.end:
+                printf("   End time: %s\n",
+                       nilmdb.utils.time.timestamp_to_human(arg.end))
+            if arg.timestamp:
+                printf("Timestamper: %s\n", str(data))
 
         # Insert the data
-        try:
+        self.client.stream_insert(arg.path, data, arg.start, arg.end)
-            self.client.stream_insert(self.args.path, ts)
+
-        except nilmdb.client.Error as e:
+    except nilmdb.client.Error as e:
-            # TODO: It would be nice to be able to offer better errors
+        # TODO: It would be nice to be able to offer better errors
-            # here, particularly in the case of overlap, which just shows
+        # here, particularly in the case of overlap, which just shows
-            # ugly bracketed ranges of 16-digit numbers and a mangled URL.
+        # ugly bracketed ranges of 16-digit numbers and a mangled URL.
-            # Need to consider adding something like e.prettyprint()
+        # Need to consider adding something like e.prettyprint()
-            # that is smarter about the contents of the error.
+        # that is smarter about the contents of the error.
-            self.die("error inserting data: %s", str(e))
+        self.die("error inserting data: %s", str(e))
 
     return

nilmdb/cmdline/intervals.py

@@ -0,0 +1,66 @@
+from nilmdb.utils.printf import *
+import nilmdb.utils.time
+
+import fnmatch
+import argparse
+from argparse import ArgumentDefaultsHelpFormatter as def_form
+
+def setup(self, sub):
+    cmd = sub.add_parser("intervals", help="List intervals",
+                         formatter_class = def_form,
+                         description="""
+                         List intervals in a stream, similar to
+                         'list --detail path'.
+
+                         If '--diff diffpath' is provided, only
+                         interval ranges that are present in 'path'
+                         and not present in 'diffpath' are printed.
+                         """)
+    cmd.set_defaults(verify = cmd_intervals_verify,
+                     handler = cmd_intervals)
+
+    group = cmd.add_argument_group("Stream selection")
+    group.add_argument("path", metavar="PATH",
+                       help="List intervals for this path",
+                       ).completer = self.complete.path
+    group.add_argument("-d", "--diff", metavar="PATH",
+                       help="Subtract intervals from this path",
+                       ).completer = self.complete.path
+
+    group = cmd.add_argument_group("Interval details")
+    group.add_argument("-s", "--start",
+                       metavar="TIME", type=self.arg_time,
+                       help="Starting timestamp for intervals "
+                       "(free-form, inclusive)",
+                       ).completer = self.complete.time
+    group.add_argument("-e", "--end",
+                       metavar="TIME", type=self.arg_time,
+                       help="Ending timestamp for intervals "
+                       "(free-form, noninclusive)",
+                       ).completer = self.complete.time
+
+    group = cmd.add_argument_group("Misc options")
+    group.add_argument("-T", "--timestamp-raw", action="store_true",
+                       help="Show raw timestamps when printing times")
+
+    return cmd
+
+def cmd_intervals_verify(self):
+    if self.args.start is not None and self.args.end is not None:
+        if self.args.start >= self.args.end:
+            self.parser.error("start must precede end")
+
+def cmd_intervals(self):
+    """List intervals in a stream"""
+    if self.args.timestamp_raw:
+        time_string = nilmdb.utils.time.timestamp_to_string
+    else:
+        time_string = nilmdb.utils.time.timestamp_to_human
+
+    try:
+           for (start, end) in self.client.stream_intervals(
+               self.args.path, self.args.start, self.args.end, self.args.diff):
+               printf("[ %s -> %s ]\n", time_string(start), time_string(end))
+    except nilmdb.client.ClientError as e:
+        self.die("error listing intervals: %s", str(e))
+

nilmdb/cmdline/list.py

@@ -18,29 +18,37 @@ def setup(self, sub):
 
     group = cmd.add_argument_group("Stream filtering")
     group.add_argument("-p", "--path", metavar="PATH", default="*",
-                       help="Match only this path (-p can be omitted)")
+                       help="Match only this path (-p can be omitted)",
+                       ).completer = self.complete.path
     group.add_argument("path_positional", default="*",
-                       nargs="?", help=argparse.SUPPRESS)
+                       nargs="?", help=argparse.SUPPRESS,
+                       ).completer = self.complete.path
     group.add_argument("-l", "--layout", default="*",
-                       help="Match only this stream layout")
+                       help="Match only this stream layout",
+                       ).completer = self.complete.layout
 
-    group = cmd.add_argument_group("Interval extent")
+    group = cmd.add_argument_group("Interval info")
-    group.add_argument("-E", "--extent", action="store_true",
+    group.add_argument("-E", "--ext", action="store_true",
-                       help="Show min/max timestamps in this stream")
+                       help="Show extended stream info, like interval "
+                       "extents and row count")
 
     group = cmd.add_argument_group("Interval details")
     group.add_argument("-d", "--detail", action="store_true",
                        help="Show available data time intervals")
     group.add_argument("-s", "--start",
                        metavar="TIME", type=self.arg_time,
-                       help="Starting timestamp (free-form, inclusive)")
+                       help="Starting timestamp for intervals "
+                       "(free-form, inclusive)",
+                       ).completer = self.complete.time
     group.add_argument("-e", "--end",
                        metavar="TIME", type=self.arg_time,
-                       help="Ending timestamp (free-form, noninclusive)")
+                       help="Ending timestamp for intervals "
+                       "(free-form, noninclusive)",
+                       ).completer = self.complete.time
 
     group = cmd.add_argument_group("Misc options")
     group.add_argument("-T", "--timestamp-raw", action="store_true",
-                       help="Show raw timestamps in time intervals or extents")
+                       help="Show raw timestamps when printing times")
 
     return cmd
 
@@ -65,26 +73,30 @@ def cmd_list_verify(self):
 
 def cmd_list(self):
     """List available streams"""
-    streams = self.client.stream_list(extent = True)
+    streams = self.client.stream_list(extended = True)
 
     if self.args.timestamp_raw:
-        time_string = repr
+        time_string = nilmdb.utils.time.timestamp_to_string
     else:
-        time_string = nilmdb.utils.time.format_time
+        time_string = nilmdb.utils.time.timestamp_to_human
 
-    for (path, layout, extent_min, extent_max) in streams:
+    for stream in streams:
+        (path, layout, int_min, int_max, rows, time) = stream[:6]
         if not (fnmatch.fnmatch(path, self.args.path) and
                 fnmatch.fnmatch(layout, self.args.layout)):
             continue
 
         printf("%s %s\n", path, layout)
 
-        if self.args.extent:
+        if self.args.ext:
-            if extent_min is None or extent_max is None:
+            if int_min is None or int_max is None:
-                printf("  extent: (no data)\n")
+                printf("  interval extents: (no data)\n")
             else:
-                printf("  extent: %s -> %s\n",
+                printf("  interval extents: %s -> %s\n",
-                       time_string(extent_min), time_string(extent_max))
+                       time_string(int_min), time_string(int_max))
+            printf("        total data: %d rows, %.6f seconds\n",
+                   rows or 0,
+                   nilmdb.utils.time.timestamp_to_seconds(time or 0))
 
         if self.args.detail:
             printed = False

nilmdb/cmdline/metadata.py

@@ -14,18 +14,22 @@ def setup(self, sub):
 
     group = cmd.add_argument_group("Required arguments")
     group.add_argument("path",
-                       help="Path of stream, e.g. /foo/bar")
+                       help="Path of stream, e.g. /foo/bar",
+                       ).completer = self.complete.path
 
     group = cmd.add_argument_group("Actions")
     exc = group.add_mutually_exclusive_group()
     exc.add_argument("-g", "--get", nargs="*", metavar="key",
-                     help="Get metadata for specified keys (default all)")
+                     help="Get metadata for specified keys (default all)",
+                     ).completer = self.complete.meta_key
     exc.add_argument("-s", "--set", nargs="+", metavar="key=value",
                      help="Replace all metadata with provided "
-                     "key=value pairs")
+                     "key=value pairs",
+                     ).completer = self.complete.meta_keyval
     exc.add_argument("-u", "--update", nargs="+", metavar="key=value",
                      help="Update metadata using provided "
-                     "key=value pairs")
+                     "key=value pairs",
+                     ).completer = self.complete.meta_keyval
     return cmd
 
 def cmd_metadata(self):

nilmdb/cmdline/remove.py

@@ -1,5 +1,4 @@
 from nilmdb.utils.printf import *
-import nilmdb
 import nilmdb.client
 
 def setup(self, sub):
@@ -12,13 +11,16 @@ def setup(self, sub):
 
     group = cmd.add_argument_group("Data selection")
     group.add_argument("path",
-                       help="Path of stream, e.g. /foo/bar")
+                       help="Path of stream, e.g. /foo/bar",
+                       ).completer = self.complete.path
     group.add_argument("-s", "--start", required=True,
                        metavar="TIME", type=self.arg_time,
-                       help="Starting timestamp (free-form, inclusive)")
+                       help="Starting timestamp (free-form, inclusive)",
+                       ).completer = self.complete.time
     group.add_argument("-e", "--end", required=True,
                        metavar="TIME", type=self.arg_time,
-                       help="Ending timestamp (free-form, noninclusive)")
+                       help="Ending timestamp (free-form, noninclusive)",
+                       ).completer = self.complete.time
 
     group = cmd.add_argument_group("Output format")
     group.add_argument("-c", "--count", action="store_true",

nilmdb/cmdline/rename.py

@@ -0,0 +1,31 @@
+from nilmdb.utils.printf import *
+import nilmdb.client
+
+from argparse import ArgumentDefaultsHelpFormatter as def_form
+
+def setup(self, sub):
+    cmd = sub.add_parser("rename", help="Rename a stream",
+                         formatter_class = def_form,
+                         description="""
+                         Rename a stream.
+
+                         Only the stream's path is renamed; no
+                         metadata is changed.
+                         """)
+    cmd.set_defaults(handler = cmd_rename)
+    group = cmd.add_argument_group("Required arguments")
+    group.add_argument("oldpath",
+                       help="Old path, e.g. /foo/old",
+                       ).completer = self.complete.path
+    group.add_argument("newpath",
+                       help="New path, e.g. /foo/bar/new",
+                       ).completer = self.complete.path
+
+    return cmd
+
+def cmd_rename(self):
+    """Rename a stream"""
+    try:
+        self.client.stream_rename(self.args.oldpath, self.args.newpath)
+    except nilmdb.client.ClientError as e:
+        self.die("error renaming stream: %s", str(e))

nilmdb/scripts/nilmdb_server.py

@@ -25,8 +25,8 @@ def main():
                        default = os.path.join(os.getcwd(), "db"))
     group.add_argument('-q', '--quiet', help = 'Silence output',
                        action = 'store_true')
-    group.add_argument('-n', '--nosync', help = 'Use asynchronous '
+    group.add_argument('-t', '--traceback',
-                       'commits for sqlite transactions',
+                       help = 'Provide tracebacks in client errors',
                        action = 'store_true', default = False)
 
     group = parser.add_argument_group("Debug options")
@@ -38,8 +38,7 @@ def main():
 
     # Create database object.  Needs to be serialized before passing
     # to the Server.
-    db = nilmdb.utils.serializer_proxy(nilmdb.NilmDB)(args.database,
+    db = nilmdb.utils.serializer_proxy(nilmdb.server.NilmDB)(args.database)
-                                                      sync = not args.nosync)
 
     # Configure the server
     if args.quiet:
@@ -49,7 +48,8 @@ def main():
     server = nilmdb.server.Server(db,
                                   host = args.address,
                                   port = args.port,
-                                  embedded = embedded)
+                                  embedded = embedded,
+                                  force_traceback = args.traceback)
 
     # Print info
     if not args.quiet:

nilmdb/server/__init__.py

@@ -16,7 +16,6 @@ try: # pragma: no cover
 except (ImportError, TypeError): # pragma: no cover
     pass
 
-import nilmdb.server.layout
 from nilmdb.server.nilmdb import NilmDB
 from nilmdb.server.server import Server
 from nilmdb.server.errors import NilmDBError, StreamError, OverlapError

nilmdb/server/bulkdata.py

@@ -4,24 +4,17 @@
 # nilmdb.py, but will pull the parent nilmdb module instead.
 from __future__ import absolute_import
 from __future__ import division
-import nilmdb
 from nilmdb.utils.printf import *
+from nilmdb.utils.time import timestamp_to_string as timestamp_to_string
+import nilmdb.utils
 
 import os
 import cPickle as pickle
-import struct
-import mmap
 import re
+import sys
+import tempfile
 
-# If we have the faulthandler module, use it.  All of the mmap stuff
+from . import rocket
-# might trigger a SIGSEGV or SIGBUS if we're not careful, and
-# faulthandler will give a traceback in that case.  (the Python
-# interpreter will still die either way).
-try: # pragma: no cover
-    import faulthandler
-    faulthandler.enable()
-except: # pragma: no cover
-    pass
 
 # Up to 256 open file descriptors at any given time.
 # These variables are global so they can be used in the decorator arguments.
@@ -63,6 +56,59 @@ class BulkData(object):
             return path.encode('utf-8')
         return path
 
+    def _create_check_ospath(self, ospath):
+        if ospath[-1] == '/':
+            raise ValueError("invalid path; should not end with a /")
+        if Table.exists(ospath):
+            raise ValueError("stream already exists at this path")
+        if os.path.isdir(ospath):
+            raise ValueError("subdirs of this path already exist")
+
+    def _create_parents(self, unicodepath):
+        """Verify the path name, and create parent directories if they
+        don't exist.  Returns a list of elements that got created."""
+        path = self._encode_filename(unicodepath)
+
+        if path[0] != '/':
+            raise ValueError("paths must start with /")
+        [ group, node ] = path.rsplit("/", 1)
+        if group == '':
+            raise ValueError("invalid path; path must contain at least one "
+                             "folder")
+        if node == '':
+            raise ValueError("invalid path; should not end with a /")
+        if not Table.valid_path(path):
+            raise ValueError("path name is invalid or contains reserved words")
+
+        # Create the table's base dir.  Note that we make a
+        # distinction here between NilmDB paths (always Unix style,
+        # split apart manually) and OS paths (built up with
+        # os.path.join)
+
+        # Make directories leading up to this one
+        elements = path.lstrip('/').split('/')
+        made_dirs = []
+        try:
+            # Make parent elements
+            for i in range(len(elements)):
+                ospath = os.path.join(self.root, *elements[0:i])
+                if Table.exists(ospath):
+                    raise ValueError("path is subdir of existing node")
+                if not os.path.isdir(ospath):
+                    os.mkdir(ospath)
+                    made_dirs.append(ospath)
+        except Exception as e:
+            # Try to remove paths that we created; ignore errors
+            exc_info = sys.exc_info()
+            for ospath in reversed(made_dirs): # pragma: no cover (hard to hit)
+                try:
+                    os.rmdir(ospath)
+                except OSError:
+                    pass
+            raise exc_info[1], None, exc_info[2]
+
+        return elements
+
     def create(self, unicodepath, layout_name):
         """
         unicodepath: path to the data (e.g. u'/newton/prep').
@@ -74,63 +120,80 @@ class BulkData(object):
 
         layout_name: string for nilmdb.layout.get_named(), e.g. 'float32_8'
         """
-        path = self._encode_filename(unicodepath)
+        elements = self._create_parents(unicodepath)
-
-        if path[0] != '/':
-            raise ValueError("paths must start with /")
-        [ group, node ] = path.rsplit("/", 1)
-        if group == '':
-            raise ValueError("invalid path; path must contain at least one "
-                             "folder")
-
-        # Get layout, and build format string for struct module
-        try:
-            layout = nilmdb.server.layout.get_named(layout_name)
-            struct_fmt = '<d'  # Little endian, double timestamp
-            struct_mapping = {
-                "int8": 'b',
-                "uint8": 'B',
-                "int16": 'h',
-                "uint16": 'H',
-                "int32": 'i',
-                "uint32": 'I',
-                "int64": 'q',
-                "uint64": 'Q',
-                "float32": 'f',
-                "float64": 'd',
-                }
-            struct_fmt += struct_mapping[layout.datatype] * layout.count
-        except KeyError:
-            raise ValueError("no such layout, or bad data types")
-
-        # Create the table.  Note that we make a distinction here
-        # between NilmDB paths (always Unix style, split apart
-        # manually) and OS paths (built up with os.path.join)
-
-        # Make directories leading up to this one
-        elements = path.lstrip('/').split('/')
-        for i in range(len(elements)):
-            ospath = os.path.join(self.root, *elements[0:i])
-            if Table.exists(ospath):
-                raise ValueError("path is subdir of existing node")
-            if not os.path.isdir(ospath):
-                os.mkdir(ospath)
 
         # Make the final dir
         ospath = os.path.join(self.root, *elements)
-        if os.path.isdir(ospath):
+        self._create_check_ospath(ospath)
-            raise ValueError("subdirs of this path already exist")
         os.mkdir(ospath)
 
-        # Write format string to file
+        try:
-        Table.create(ospath, struct_fmt, self.file_size, self.files_per_dir)
+            # Write format string to file
+            Table.create(ospath, layout_name, self.file_size,
+                         self.files_per_dir)
 
-        # Open and cache it
+            # Open and cache it
-        self.getnode(unicodepath)
+            self.getnode(unicodepath)
+        except:
+            exc_info = sys.exc_info()
+            try:
+                os.rmdir(ospath)
+            except OSError:
+                pass
+            raise exc_info[1], None, exc_info[2]
 
         # Success
         return
 
+    def _remove_leaves(self, unicodepath):
+        """Remove empty directories starting at the leaves of unicodepath"""
+        path = self._encode_filename(unicodepath)
+        elements = path.lstrip('/').split('/')
+        for i in reversed(range(len(elements))):
+            ospath = os.path.join(self.root, *elements[0:i+1])
+            try:
+                os.rmdir(ospath)
+            except OSError:
+                pass
+
+    def rename(self, oldunicodepath, newunicodepath):
+        """Move entire tree from 'oldunicodepath' to
+        'newunicodepath'"""
+        oldpath = self._encode_filename(oldunicodepath)
+        newpath = self._encode_filename(newunicodepath)
+
+        # Get OS paths
+        oldelements = oldpath.lstrip('/').split('/')
+        oldospath = os.path.join(self.root, *oldelements)
+        newelements = newpath.lstrip('/').split('/')
+        newospath = os.path.join(self.root, *newelements)
+
+        # Basic checks
+        if oldospath == newospath:
+            raise ValueError("old and new paths are the same")
+        self._create_check_ospath(newospath)
+
+        # Move the table to a temporary location
+        tmpdir = tempfile.mkdtemp(prefix = "rename-", dir = self.root)
+        tmppath = os.path.join(tmpdir, "table")
+        os.rename(oldospath, tmppath)
+
+        try:
+            # Create parent dirs for new location
+            self._create_parents(newunicodepath)
+
+            # Move table into new location
+            os.rename(tmppath, newospath)
+        except Exception:
+            # On failure, move the table back to original path
+            os.rename(tmppath, oldospath)
+            os.rmdir(tmpdir)
+            raise
+
+        # Prune old dirs
+        self._remove_leaves(oldunicodepath)
+        os.rmdir(tmpdir)
+
     def destroy(self, unicodepath):
         """Fully remove all data at a particular path.  No way to undo
         it!  The group/path structure is removed, too."""
@@ -152,13 +215,8 @@ class BulkData(object):
             for name in dirs:
                 os.rmdir(os.path.join(root, name))
 
-        # Remove empty parent directories
+        # Remove leftover empty directories
-        for i in reversed(range(len(elements))):
+        self._remove_leaves(unicodepath)
-            ospath = os.path.join(self.root, *elements[0:i+1])
-            try:
-                os.rmdir(ospath)
-            except OSError:
-                break
 
     # Cache open tables
     @nilmdb.utils.lru_cache(size = table_cache_size,
@@ -171,91 +229,37 @@ class BulkData(object):
         ospath = os.path.join(self.root, *elements)
         return Table(ospath)
 
-@nilmdb.utils.must_close(wrap_verify = False)
-class File(object):
-    """Object representing a single file on disk.  Data can be appended,
-    or the self.mmap handle can be used for random reads."""
-
-    def __init__(self, root, subdir, filename):
-        # Create path if it doesn't exist
-        try:
-            os.mkdir(os.path.join(root, subdir))
-        except OSError:
-            pass
-
-        # Open/create file
-        self._f = open(os.path.join(root, subdir, filename), "a+b", 0)
-
-        # Seek to end, and get size
-        self._f.seek(0, 2)
-        self.size = self._f.tell()
-
-        # Open mmap object
-        self.mmap = None
-        self._mmap_reopen()
-
-    def _mmap_reopen(self):
-        if self.size == 0:
-            # Don't mmap if the file is empty; it would fail
-            pass
-        elif self.mmap is None:
-            # Not opened yet, so open it
-            self.mmap = mmap.mmap(self._f.fileno(), 0)
-        else:
-            # Already opened, so just resize it
-            self.mmap.resize(self.size)
-
-    def close(self):
-        if self.mmap is not None:
-            self.mmap.close()
-        self._f.close()
-
-    def append(self, data): # pragma: no cover (below version used instead)
-        # Write data, flush it, and resize our mmap accordingly
-        self._f.write(data)
-        self._f.flush()
-        self.size += len(data)
-        self._mmap_reopen()
-
-    def append_pack_iter(self, count, packer, dataiter):
-        # An optimized verison of append, to avoid flushing the file
-        # and resizing the mmap after each data point.
-        try:
-            rows = []
-            for i in xrange(count):
-                row = dataiter.next()
-                rows.append(packer(*row))
-            self._f.write("".join(rows))
-        finally:
-            self._f.flush()
-            self.size = self._f.tell()
-            self._mmap_reopen()
-
 @nilmdb.utils.must_close(wrap_verify = False)
 class Table(object):
     """Tools to help access a single table (data at a specific OS path)."""
     # See design.md for design details
 
     # Class methods, to help keep format details in this class.
+    @classmethod
+    def valid_path(cls, root):
+        """Return True if a root path is a valid name"""
+        return "_format" not in root.split("/")
+
     @classmethod
     def exists(cls, root):
         """Return True if a table appears to exist at this OS path"""
         return os.path.isfile(os.path.join(root, "_format"))
 
     @classmethod
-    def create(cls, root, struct_fmt, file_size, files_per_dir):
+    def create(cls, root, layout, file_size, files_per_dir):
-        """Initialize a table at the given OS path.
+        """Initialize a table at the given OS path with the
-        'struct_fmt' is a Struct module format description"""
+        given layout string"""
 
         # Calculate rows per file so that each file is approximately
         # file_size bytes.
-        packer = struct.Struct(struct_fmt)
+        rkt = rocket.Rocket(layout, None)
-        rows_per_file = max(file_size // packer.size, 1)
+        rows_per_file = max(file_size // rkt.binary_size, 1)
+        rkt.close()
 
         fmt = { "rows_per_file": rows_per_file,
                 "files_per_dir": files_per_dir,
-                "struct_fmt": struct_fmt,
+                "layout": layout,
-                "version": 1 }
+                "version": 3 }
         with open(os.path.join(root, "_format"), "wb") as f:
             pickle.dump(fmt, f, 2)
 
@@ -264,18 +268,25 @@ class Table(object):
         """'root' is the full OS path to the directory of this table"""
         self.root = root
 
-        # Load the format and build packer
+        # Load the format
         with open(os.path.join(self.root, "_format"), "rb") as f:
             fmt = pickle.load(f)
 
-        if fmt["version"] != 1: # pragma: no cover (just future proofing)
+        if fmt["version"] != 3: # pragma: no cover
-            raise NotImplementedError("version " + fmt["version"] +
+            # Old versions used floating point timestamps, which aren't
-                                      " bulk data store not supported")
+            # valid anymore.
+            raise NotImplementedError("old version " + str(fmt["version"]) +
+                                      " bulk data store is not supported")
 
         self.rows_per_file = fmt["rows_per_file"]
         self.files_per_dir = fmt["files_per_dir"]
-        self.packer = struct.Struct(fmt["struct_fmt"])
+        self.layout = fmt["layout"]
-        self.file_size = self.packer.size * self.rows_per_file
+
+        # Use rocket to get row size and file size
+        rkt = rocket.Rocket(self.layout, None)
+        self.row_size = rkt.binary_size
+        self.file_size = rkt.binary_size * self.rows_per_file
+        rkt.close()
 
         # Find nrows
         self.nrows = self._get_nrows()
@@ -330,88 +341,163 @@ class Table(object):
         # will just get longer but will still sort correctly.
         dirname = sprintf("%04x", filenum // self.files_per_dir)
         filename = sprintf("%04x", filenum % self.files_per_dir)
-        offset = (row % self.rows_per_file) * self.packer.size
+        offset = (row % self.rows_per_file) * self.row_size
         count = self.rows_per_file - (row % self.rows_per_file)
         return (dirname, filename, offset, count)
 
     def _row_from_offset(self, subdir, filename, offset):
         """Return the row number that corresponds to the given
         'subdir/filename' and byte-offset within that file."""
-        if (offset % self.packer.size) != 0: # pragma: no cover; shouldn't occur
+        if (offset % self.row_size) != 0: # pragma: no cover
+            # this shouldn't occur, unless there is some corruption somewhere
             raise ValueError("file offset is not a multiple of data size")
         filenum = int(subdir, 16) * self.files_per_dir + int(filename, 16)
-        row = (filenum * self.rows_per_file) + (offset // self.packer.size)
+        row = (filenum * self.rows_per_file) + (offset // self.row_size)
         return row
 
+    def _remove_or_truncate_file(self, subdir, filename, offset = 0):
+        """Remove the given file, and remove the subdirectory too
+        if it's empty.  If offset is nonzero, truncate the file
+        to that size instead."""
+        # Close potentially open file in file_open LRU cache
+        self.file_open.cache_remove(self, subdir, filename)
+        if offset:
+            # Truncate it
+            with open(os.path.join(self.root, subdir, filename), "r+b") as f:
+                f.truncate(offset)
+        else:
+            # Remove file
+            os.remove(os.path.join(self.root, subdir, filename))
+            # Try deleting subdir, too
+            try:
+                os.rmdir(os.path.join(self.root, subdir))
+            except:
+                pass
+
     # Cache open files
     @nilmdb.utils.lru_cache(size = fd_cache_size,
                             onremove = lambda f: f.close())
     def file_open(self, subdir, filename):
         """Open and map a given 'subdir/filename' (relative to self.root).
         Will be automatically closed when evicted from the cache."""
-        return File(self.root, subdir, filename)
+        # Create path if it doesn't exist
+        try:
+            os.mkdir(os.path.join(self.root, subdir))
+        except OSError:
+            pass
+        # Return a rocket.Rocket object, which contains the open file
+        return rocket.Rocket(self.layout,
+                             os.path.join(self.root, subdir, filename))
 
-    def append(self, data):
+    def append_string(self, data, start, end):
-        """Append the data and flush it to disk.
+        """Parse the formatted string in 'data', according to the
-        data is a nested Python list [[row],[row],[...]]"""
+        current layout, and append it to the table.  If any timestamps
-        remaining = len(data)
+        are non-monotonic, or don't fall between 'start' and 'end',
-        dataiter = iter(data)
+        a ValueError is raised.
-        while remaining:
+
-            # See how many rows we can fit into the current file, and open it
+        If this function succeeds, it returns normally.  Otherwise,
-            (subdir, fname, offset, count) = self._offset_from_row(self.nrows)
+        the table is reverted back to its original state by truncating
+        or deleting files as necessary."""
+        data_offset = 0
+        last_timestamp = nilmdb.utils.time.min_timestamp
+        tot_rows = self.nrows
+        count = 0
+        linenum = 0
+        try:
+            while data_offset < len(data):
+                # See how many rows we can fit into the current file,
+                # and open it
+                (subdir, fname, offset, count) = self._offset_from_row(tot_rows)
+                f = self.file_open(subdir, fname)
+
+                # Ask the rocket object to parse and append up to "count"
+                # rows of data, verifying things along the way.
+                try:
+                    (added_rows, data_offset, last_timestamp, linenum
+                     ) = f.append_string(count, data, data_offset, linenum,
+                                         start, end, last_timestamp)
+                except rocket.ParseError as e:
+                    (linenum, colnum, errtype, obj) = e.args
+                    where = "line %d, column %d: " % (linenum, colnum)
+                    # Extract out the error line, add column marker
+                    try:
+                        bad = data.splitlines()[linenum-1]
+                        badptr = ' ' * (colnum - 1) + '^'
+                    except IndexError: # pragma: no cover
+                        bad = ""
+                    if errtype == rocket.ERR_NON_MONOTONIC:
+                        err = "timestamp is not monotonically increasing"
+                    elif errtype == rocket.ERR_OUT_OF_INTERVAL:
+                        if obj < start:
+                            err = sprintf("Data timestamp %s < start time %s",
+                                          timestamp_to_string(obj),
+                                          timestamp_to_string(start))
+                        else:
+                            err = sprintf("Data timestamp %s >= end time %s",
+                                          timestamp_to_string(obj),
+                                          timestamp_to_string(end))
+                    else:
+                        err = str(obj)
+                    raise ValueError("error parsing input data: " +
+                                     where + err + "\n" + bad + "\n" + badptr)
+                tot_rows += added_rows
+        except Exception:
+            # Some failure, so try to roll things back by truncating or
+            # deleting files that we may have appended data to.
+            cleanpos = self.nrows
+            while cleanpos <= tot_rows:
+                (subdir, fname, offset, count) = self._offset_from_row(cleanpos)
+                self._remove_or_truncate_file(subdir, fname, offset)
+                cleanpos += count
+            # Re-raise original exception
+            raise
+        else:
+            # Success, so update self.nrows accordingly
+            self.nrows = tot_rows
+
+    def get_data(self, start, stop):
+        """Extract data corresponding to Python range [n:m],
+        and returns a formatted string"""
+        if (start is None or
+            stop is None or
+            start > stop or
+            start < 0 or
+            stop > self.nrows):
+            raise IndexError("Index out of range")
+
+        ret = []
+        row = start
+        remaining = stop - start
+        while remaining > 0:
+            (subdir, filename, offset, count) = self._offset_from_row(row)
             if count > remaining:
                 count = remaining
-
+            f = self.file_open(subdir, filename)
-            f = self.file_open(subdir, fname)
+            ret.append(f.extract_string(offset, count))
-
-            # Write the data
-            f.append_pack_iter(count, self.packer.pack, dataiter)
             remaining -= count
-            self.nrows += count
+            row += count
+        return "".join(ret)
 
-    def __getitem__(self, key):
+    def __getitem__(self, row):
-        """Extract data and return it.  Supports simple indexing
+        """Extract timestamps from a row, with table[n] notation."""
-        (table[n]) and range slices (table[n:m]).  Returns a nested
+        if row < 0 or row >= self.nrows:
-        Python list [[row],[row],[...]]"""
-
-        # Handle simple slices
-        if isinstance(key, slice):
-            # Fall back to brute force if the slice isn't simple
-            if ((key.step is not None and key.step != 1) or
-                key.start is None or
-                key.stop is None or
-                key.start >= key.stop or
-                key.start < 0 or
-                key.stop > self.nrows):
-                return [ self[x] for x in xrange(*key.indices(self.nrows)) ]
-
-            ret = []
-            row = key.start
-            remaining = key.stop - key.start
-            while remaining:
-                (subdir, filename, offset, count) = self._offset_from_row(row)
-                if count > remaining:
-                    count = remaining
-                mm = self.file_open(subdir, filename).mmap
-                for i in xrange(count):
-                    ret.append(list(self.packer.unpack_from(mm, offset)))
-                    offset += self.packer.size
-                remaining -= count
-                row += count
-            return ret
-
-        # Handle single points
-        if key < 0 or key >= self.nrows:
             raise IndexError("Index out of range")
-        (subdir, filename, offset, count) = self._offset_from_row(key)
+        (subdir, filename, offset, count) = self._offset_from_row(row)
-        mm = self.file_open(subdir, filename).mmap
+        f = self.file_open(subdir, filename)
-        # unpack_from ignores the mmap object's current seek position
+        return f.extract_timestamp(offset)
-        return list(self.packer.unpack_from(mm, offset))
 
     def _remove_rows(self, subdir, filename, start, stop):
         """Helper to mark specific rows as being removed from a
-        file, and potentially removing or truncating the file itself."""
+        file, and potentially remove or truncate the file itself."""
-        # Import an existing list of deleted rows for this file
+        # Close potentially open file in file_open LRU cache
+        self.file_open.cache_remove(self, subdir, filename)
+
+        # We keep a file like 0000.removed that contains a list of
+        # which rows have been "removed".  Note that we never have to
+        # remove entries from this list, because we never decrease
+        # self.nrows, and so we will never overwrite those locations in the
+        # file.  Only when the list covers the entire extent of the
+        # file will that file be removed.
         datafile = os.path.join(self.root, subdir, filename)
         cachefile = datafile + ".removed"
         try:
@@ -451,20 +537,19 @@ class Table(object):
         # are generally easier if we don't have to special-case that.
         if (len(merged) == 1 and
             merged[0][0] == 0 and merged[0][1] == self.rows_per_file):
-            # Close potentially open file in file_open LRU cache
-            self.file_open.cache_remove(self, subdir, filename)
-
             # Delete files
-            os.remove(datafile)
             if cachefile_present:
                 os.remove(cachefile)
-
+            self._remove_or_truncate_file(subdir, filename, 0)
-            # Try deleting subdir, too
-            try:
-                os.rmdir(os.path.join(self.root, subdir))
-            except:
-                pass
         else:
+            # File needs to stick around.  This means we can get
+            # degenerate cases where we have large files containing as
+            # little as one row.  Try to punch a hole in the file,
+            # so that this region doesn't take up filesystem space.
+            offset = start * self.row_size
+            count = (stop - start) * self.row_size
+            nilmdb.utils.fallocate.punch_hole(datafile, offset, count)
+
             # Update cache.  Try to do it atomically.
             nilmdb.utils.atomic.replace_file(cachefile,
                                              pickle.dumps(merged, 2))
@@ -485,16 +570,8 @@ class Table(object):
             (subdir, filename, offset, count) = self._offset_from_row(row)
             if count > remaining:
                 count = remaining
-            row_offset = offset // self.packer.size
+            row_offset = offset // self.row_size
             # Mark the rows as being removed
             self._remove_rows(subdir, filename, row_offset, row_offset + count)
             remaining -= count
             row += count
-
-class TimestampOnlyTable(object):
-    """Helper that lets us pass a Tables object into bisect, by
-    returning only the timestamp when a particular row is requested."""
-    def __init__(self, table):
-        self.table = table
-    def __getitem__(self, index):
-        return self.table[index][0]

nilmdb/server/interval.pyx

@@ -1,5 +1,9 @@
 """Interval, IntervalSet
 
+The Interval implemented here is just like
+nilmdb.utils.interval.Interval, except implemented in Cython for
+speed.
+
 Represents an interval of time, and a set of such intervals.
 
 Intervals are half-open, ie. they include data points with timestamps
@@ -19,49 +23,44 @@ Intervals are half-open, ie. they include data points with timestamps
 # Fourth version is an optimized rb-tree that stores interval starts
 # and ends directly in the tree, like bxinterval did.
 
-cimport rbtree
+from ..utils.time import min_timestamp as nilmdb_min_timestamp
-cdef extern from "stdint.h":
+from ..utils.time import max_timestamp as nilmdb_max_timestamp
-    ctypedef unsigned long long uint64_t
+from ..utils.time import timestamp_to_string
+from ..utils.iterator import imerge
+from ..utils.interval import IntervalError
+import itertools
 
-class IntervalError(Exception):
+cimport rbtree
-    """Error due to interval overlap, etc"""
+from libc.stdint cimport uint64_t, int64_t
-    pass
+
+ctypedef int64_t timestamp_t
 
 cdef class Interval:
     """Represents an interval of time."""
 
-    cdef public double start, end
+    cdef public timestamp_t start, end
 
-    def __init__(self, double start, double end):
+    def __init__(self, timestamp_t start, timestamp_t end):
         """
-        'start' and 'end' are arbitrary floats that represent time
+        'start' and 'end' are arbitrary numbers that represent time
         """
         if start >= end:
             # Explicitly disallow zero-width intervals (since they're half-open)
             raise IntervalError("start %s must precede end %s" % (start, end))
-        self.start = float(start)
+        self.start = start
-        self.end = float(end)
+        self.end = end
 
     def __repr__(self):
         s = repr(self.start) + ", " + repr(self.end)
         return self.__class__.__name__ + "(" + s + ")"
 
     def __str__(self):
-        return "[" + repr(self.start) + " -> " + repr(self.end) + ")"
+        return ("[" + timestamp_to_string(self.start) +
+                " -> " + timestamp_to_string(self.end) + ")")
 
     def __cmp__(self, Interval other):
         """Compare two intervals.  If non-equal, order by start then end"""
-        if not isinstance(other, Interval):
+        return cmp(self.start, other.start) or cmp(self.end, other.end)
-            raise TypeError("bad type")
-        if self.start == other.start:
-            if self.end < other.end:
-                return -1
-            if self.end > other.end:
-                return 1
-            return 0
-        if self.start < other.start:
-            return -1
-        return 1
 
     cpdef intersects(self, Interval other):
         """Return True if two Interval objects intersect"""
@@ -69,7 +68,7 @@ cdef class Interval:
             return False
         return True
 
-    cpdef subset(self, double start, double end):
+    cpdef subset(self, timestamp_t start, timestamp_t end):
         """Return a new Interval that is a subset of this one"""
         # A subclass that tracks additional data might override this.
         if start < self.start or end > self.end:
@@ -91,14 +90,14 @@ cdef class DBInterval(Interval):
         db_end = 200, db_endpos = 20000
     """
 
-    cpdef public double db_start, db_end
+    cpdef public timestamp_t db_start, db_end
     cpdef public uint64_t db_startpos, db_endpos
 
     def __init__(self, start, end,
                  db_start, db_end,
                  db_startpos, db_endpos):
         """
-        'db_start' and 'db_end' are arbitrary floats that represent
+        'db_start' and 'db_end' are arbitrary numbers that represent
         time.  They must be a strict superset of the time interval
         covered by 'start' and 'end'.  The 'db_startpos' and
         'db_endpos' are arbitrary database position indicators that
@@ -118,7 +117,7 @@ cdef class DBInterval(Interval):
         s += ", " + repr(self.db_startpos) + ", " + repr(self.db_endpos)
         return self.__class__.__name__ + "(" + s + ")"
 
-    cpdef subset(self, double start, double end):
+    cpdef subset(self, timestamp_t start, timestamp_t end):
         """
         Return a new DBInterval that is a subset of this one
         """
@@ -262,21 +261,15 @@ cdef class IntervalSet:
 
     def __and__(self, other not None):
         """
-        Compute a new IntervalSet from the intersection of two others
+        Compute a new IntervalSet from the intersection of this
+        IntervalSet with one other interval.
 
         Output intervals are built as subsets of the intervals in the
         first argument (self).
         """
         out = IntervalSet()
-
+        for i in self.intersection(other):
-        if not isinstance(other, IntervalSet):
+            out.tree.insert(rbtree.RBNode(i.start, i.end, i))
-            for i in self.intersection(other):
-                out.tree.insert(rbtree.RBNode(i.start, i.end, i))
-        else:
-            for x in other:
-                for i in self.intersection(x):
-                    out.tree.insert(rbtree.RBNode(i.start, i.end, i))
-
         return out
 
     def intersection(self, Interval interval not None, orig = False):
@@ -293,23 +286,18 @@ cdef class IntervalSet:
         (potentially) subsetted to make the one that is being
         returned.
         """
-        if not isinstance(interval, Interval):
+        if orig:
-            raise TypeError("bad type")
+            for n in self.tree.intersect(interval.start, interval.end):
-        for n in self.tree.intersect(interval.start, interval.end):
+                i = n.obj
-            i = n.obj
+                subset = i.subset(max(i.start, interval.start),
-            if i:
+                                  min(i.end, interval.end))
-                if i.start >= interval.start and i.end <= interval.end:
+                yield (subset, i)
-                    if orig:
+        else:
-                        yield (i, i)
+            for n in self.tree.intersect(interval.start, interval.end):
-                    else:
+                i = n.obj
-                        yield i
+                subset = i.subset(max(i.start, interval.start),
-                else:
+                                  min(i.end, interval.end))
-                    subset = i.subset(max(i.start, interval.start),
+                yield subset
-                                      min(i.end, interval.end))
-                    if orig:
-                        yield (subset, i)
-                    else:
-                        yield subset
 
     cpdef intersects(self, Interval other):
         """Return True if this IntervalSet intersects another interval"""
@@ -318,7 +306,7 @@ cdef class IntervalSet:
                 return True
         return False
 
-    def find_end(self, double t):
+    def find_end(self, timestamp_t t):
         """
         Return an Interval from this tree that ends at time t, or
         None if it doesn't exist.

nilmdb/server/layout.pyx

@@ -1,197 +0,0 @@
-# cython: profile=False
-
-import time
-import sys
-import inspect
-import cStringIO
-
-cdef enum:
-    max_value_count = 64
-
-cimport cython
-cimport libc.stdlib
-cimport libc.stdio
-cimport libc.string
-
-class ParserError(Exception):
-    def __init__(self, line, message):
-        self.message = "line " + str(line) + ": " + message
-        Exception.__init__(self, self.message)
-
-class FormatterError(Exception):
-    pass
-
-class Layout:
-    """Represents a NILM database layout"""
-
-    def __init__(self, typestring):
-        """Initialize this Layout object to handle the specified
-        type string"""
-        try:
-            [ datatype, count ] = typestring.split("_")
-        except:
-            raise KeyError("invalid layout string")
-
-        try:
-            self.count = int(count)
-        except ValueError:
-            raise KeyError("invalid count")
-        if self.count < 1 or self.count > max_value_count:
-            raise KeyError("invalid count")
-
-        if datatype == 'uint16':
-            self.parse = self.parse_uint16
-            self.format_str = "%.6f" + " %d" * self.count
-            self.format = self.format_generic
-        elif datatype == 'float32' or datatype == 'float64':
-            self.parse = self.parse_float64
-            self.format_str = "%.6f" + " %f" * self.count
-            self.format = self.format_generic
-        else:
-            raise KeyError("invalid type")
-
-        self.datatype = datatype
-
-    # Parsers
-    def parse_float64(self, char *text):
-        cdef int n
-        cdef double ts
-        # Return doubles even in float32 case, since they're going into
-        # a Python array which would upconvert to double anyway.
-        result = [0] * (self.count + 1)
-        cdef char *end
-        ts = libc.stdlib.strtod(text, &end)
-        if end == text:
-            raise ValueError("bad timestamp")
-        result[0] = ts
-        for n in range(self.count):
-            text = end
-            result[n+1] = libc.stdlib.strtod(text, &end)
-            if end == text:
-                raise ValueError("wrong number of values")
-        n = 0
-        while end[n] == ' ':
-            n += 1
-        if end[n] != '\n' and end[n] != '#' and end[n] != '\0':
-            raise ValueError("extra data on line")
-        return (ts, result)
-
-    def parse_uint16(self, char *text):
-        cdef int n
-        cdef double ts
-        cdef int v
-        cdef char *end
-        result = [0] * (self.count + 1)
-        ts = libc.stdlib.strtod(text, &end)
-        if end == text:
-            raise ValueError("bad timestamp")
-        result[0] = ts
-        for n in range(self.count):
-            text = end
-            v = libc.stdlib.strtol(text, &end, 10)
-            if v < 0 or v > 65535:
-                raise ValueError("value out of range")
-            result[n+1] = v
-            if end == text:
-                raise ValueError("wrong number of values")
-        n = 0
-        while end[n] == ' ':
-            n += 1
-        if end[n] != '\n' and end[n] != '#' and end[n] != '\0':
-            raise ValueError("extra data on line")
-        return (ts, result)
-
-    # Formatters
-    def format_generic(self, d):
-        n = len(d) - 1
-        if n != self.count:
-            raise ValueError("wrong number of values for layout type: "
-                             "got %d, wanted %d" % (n, self.count))
-        return (self.format_str % tuple(d)) + "\n"
-
-# Get a layout by name
-def get_named(typestring):
-    try:
-        return Layout(typestring)
-    except KeyError:
-        compat = { "PrepData": "float32_8",
-                   "RawData": "uint16_6",
-                   "RawNotchedData": "uint16_9" }
-        return Layout(compat[typestring])
-
-class Parser(object):
-    """Object that parses and stores ASCII data for inclusion into the
-    database"""
-
-    def __init__(self, layout):
-        if issubclass(layout.__class__, Layout):
-            self.layout = layout
-        else:
-            try:
-                self.layout = get_named(layout)
-            except KeyError:
-                raise TypeError("unknown layout")
-
-        self.data = []
-        self.min_timestamp = None
-        self.max_timestamp = None
-
-    def parse(self, textdata):
-        """
-        Parse the data, provided as lines of text, using the current
-        layout, into an internal data structure suitable for a
-        pytables 'table.append(parser.data)'.
-        """
-        cdef double last_ts = -1e12, ts
-        cdef int n = 0, i
-        cdef char *line
-
-        indata = cStringIO.StringIO(textdata)
-        # Assume any parsing error is a real error.
-        # In the future we might want to skip completely empty lines,
-        # or partial lines right before EOF?
-        try:
-            self.data = []
-            for pyline in indata:
-                line = pyline
-                n += 1
-                if line[0] == '\#':
-                    continue
-                (ts, row) = self.layout.parse(line)
-                if ts <= last_ts:
-                    raise ValueError("timestamp is not "
-                                     "monotonically increasing")
-                last_ts = ts
-                self.data.append(row)
-        except (ValueError, IndexError, TypeError) as e:
-            raise ParserError(n, "error: " + e.message)
-
-        # Mark timestamp ranges
-        if len(self.data):
-            self.min_timestamp = self.data[0][0]
-            self.max_timestamp = self.data[-1][0]
-
-class Formatter(object):
-    """Object that formats database data into ASCII"""
-
-    def __init__(self, layout):
-        if issubclass(layout.__class__, Layout):
-            self.layout = layout
-        else:
-            try:
-                self.layout = get_named(layout)
-            except KeyError:
-                raise TypeError("unknown layout")
-
-    def format(self, data):
-        """
-        Format raw data from the database, using the current layout,
-        as lines of ACSII text.
-        """
-        text = cStringIO.StringIO()
-        try:
-            for row in data:
-                text.write(self.layout.format(row))
-        except (ValueError, IndexError, TypeError) as e:
-            raise FormatterError("formatting error: " + e.message)
-        return text.getvalue()

nilmdb/server/nilmdb.py

@@ -10,10 +10,12 @@ Manages both the SQL database and the table storage backend.
 # Need absolute_import so that "import nilmdb" won't pull in
 # nilmdb.py, but will pull the parent nilmdb module instead.
 from __future__ import absolute_import
-import nilmdb
+import nilmdb.utils
 from nilmdb.utils.printf import *
-from nilmdb.server.interval import (Interval, DBInterval,
+
-                                    IntervalSet, IntervalError)
+from nilmdb.utils.interval import IntervalError
+from nilmdb.server.interval import Interval, DBInterval, IntervalSet
+
 from nilmdb.server import bulkdata
 from nilmdb.server.errors import NilmDBError, StreamError, OverlapError
 
@@ -31,16 +33,14 @@ import bisect
 #    after a series of INSERT, SELECT, but before a CREATE TABLE or PRAGMA.
 # 3: at the end of an explicit transaction, e.g. "with self.con as con:"
 #
-# To speed up testing, or if this transaction speed becomes an issue,
+# To speed things up, we can set 'PRAGMA synchronous=OFF'.  Or, it
-# the sync=False option to NilmDB.__init__ will set PRAGMA synchronous=OFF.
+# seems that 'PRAGMA synchronous=NORMAL' and 'PRAGMA journal_mode=WAL'
-
+# give an equivalent speedup more safely.  That is what is used here.
-
-# Don't touch old entries -- just add new ones.
 _sql_schema_updates = {
-    0: """
+    0: { "next": 1, "sql": """
     -- All streams
     CREATE TABLE streams(
-    	id INTEGER PRIMARY KEY,		-- stream ID
+        id INTEGER PRIMARY KEY,		-- stream ID
         path TEXT UNIQUE NOT NULL,	-- path, e.g. '/newton/prep'
         layout TEXT NOT NULL		-- layout name, e.g. float32_8
     );
@@ -61,24 +61,40 @@ _sql_schema_updates = {
         end_pos INTEGER NOT NULL
     );
     CREATE INDEX _ranges_index ON ranges (stream_id, start_time, end_time);
-    """,
+    """ },
 
-    1: """
+    1: { "next": 3, "sql": """
     -- Generic dictionary-type metadata that can be associated with a stream
     CREATE TABLE metadata(
     	stream_id INTEGER NOT NULL,
         key TEXT NOT NULL,
         value TEXT
     );
-    """,
+    """ },
+
+    2: { "error": "old format with floating-point timestamps requires "
+         "nilmdb 1.3.1 or older" },
+
+    3: { "next": None },
 }
 
 @nilmdb.utils.must_close()
 class NilmDB(object):
     verbose = 0
 
-    def __init__(self, basepath, sync=True, max_results=None,
+    def __init__(self, basepath, max_results=None,
-                 bulkdata_args=None):
+                 max_removals=None, bulkdata_args=None):
+        """Initialize NilmDB at the given basepath.
+        Other arguments are for debugging / testing:
+
+        'max_results' is the max rows to send in a single
+        stream_intervals or stream_extract response.
+
+        'max_removals' is the max rows to delete at once
+        in stream_move.
+
+        'bulkdata_args' is kwargs for the bulkdata module.
+        """
         if bulkdata_args is None:
             bulkdata_args = {}
 
@@ -98,20 +114,21 @@ class NilmDB(object):
         # SQLite database too
         sqlfilename = os.path.join(self.basepath, "data.sql")
         self.con = sqlite3.connect(sqlfilename, check_same_thread = True)
-        self._sql_schema_update()
+        try:
+            self._sql_schema_update()
+        finally: # pragma: no cover
+            self.data.close()
 
         # See big comment at top about the performance implications of this
-        if sync:
+        self.con.execute("PRAGMA synchronous=NORMAL")
-            self.con.execute("PRAGMA synchronous=FULL")
+        self.con.execute("PRAGMA journal_mode=WAL")
-        else:
-            self.con.execute("PRAGMA synchronous=OFF")
 
         # Approximate largest number of elements that we want to send
-        # in a single reply (for stream_intervals, stream_extract)
+        # in a single reply (for stream_intervals, stream_extract).
-        if max_results:
+        self.max_results = max_results or 16384
-            self.max_results = max_results
+
-        else:
+        # Remove up to this many rows per call to stream_remove.
-            self.max_results = 16384
+        self.max_removals = max_removals or 1048576
 
     def get_basepath(self):
         return self.basepath
@@ -127,11 +144,20 @@ class NilmDB(object):
         version = cur.execute("PRAGMA user_version").fetchone()[0]
         oldversion = version
 
-        while version in _sql_schema_updates:
+        while True:
-            cur.executescript(_sql_schema_updates[version])
+            if version not in _sql_schema_updates: # pragma: no cover
-            version = version + 1
+                raise Exception(self.basepath + ": unknown database version "
+                                + str(version))
+            update = _sql_schema_updates[version]
+            if "error" in update: # pragma: no cover
+                raise Exception(self.basepath + ": can't use database version "
+                                + str(version) + ": " + update["error"])
+            if update["next"] is None:
+                break
+            cur.executescript(update["sql"])
+            version = update["next"]
             if self.verbose: # pragma: no cover
-                printf("Schema updated to %d\n", version)
+                printf("Database schema updated to %d\n", version)
 
         if version != oldversion:
             with self.con:
@@ -139,9 +165,9 @@ class NilmDB(object):
 
     def _check_user_times(self, start, end):
         if start is None:
-            start = -1e12
+            start = nilmdb.utils.time.min_timestamp
         if end is None:
-            end = 1e12
+            end = nilmdb.utils.time.max_timestamp
         if start >= end:
             raise NilmDBError("start must precede end")
         return (start, end)
@@ -269,7 +295,7 @@ class NilmDB(object):
 
         return
 
-    def stream_list(self, path = None, layout = None, extent = False):
+    def stream_list(self, path = None, layout = None, extended = False):
         """Return list of lists of all streams in the database.
 
         If path is specified, include only streams with a path that
@@ -278,19 +304,26 @@ class NilmDB(object):
         If layout is specified, include only streams with a layout
         that matches the given string.
 
-        If extent = False, returns a list of lists containing
+        If extended = False, returns a list of lists containing
         the path and layout: [ path, layout ]
 
-        If extent = True, returns a list of lists containing the
+        If extended = True, returns a list of lists containing
-        path, layout, and min/max extent of the data:
+        more information:
-        [ path, layout, extent_min, extent_max ]
+           path
+           layout
+           interval_min (earliest interval start)
+           interval_max (latest interval end)
+           rows         (total number of rows of data)
+           time         (total time covered by this stream, in timestamp units)
         """
         params = ()
         query = "SELECT streams.path, streams.layout"
-        if extent:
+        if extended:
-            query += ", min(ranges.start_time), max(ranges.end_time)"
+            query += ", min(ranges.start_time), max(ranges.end_time) "
+            query += ", coalesce(sum(ranges.end_pos - ranges.start_pos), 0) "
+            query += ", coalesce(sum(ranges.end_time - ranges.start_time), 0) "
         query += " FROM streams"
-        if extent:
+        if extended:
             query += " LEFT JOIN ranges ON streams.id = ranges.stream_id"
         query += " WHERE 1=1"
         if layout is not None:
@@ -303,31 +336,45 @@ class NilmDB(object):
         result = self.con.execute(query, params).fetchall()
         return [ list(x) for x in result ]
 
-    def stream_intervals(self, path, start = None, end = None):
+    def stream_intervals(self, path, start = None, end = None, diffpath = None):
         """
+        List all intervals in 'path' between 'start' and 'end'.  If
+        'diffpath' is not none, list instead the set-difference
+        between the intervals in the two streams; i.e. all interval
+        ranges that are present in 'path' but not 'diffpath'.
+
         Returns (intervals, restart) tuple.
 
-        intervals is a list of [start,end] timestamps of all intervals
+        'intervals' is a list of [start,end] timestamps of all intervals
         that exist for path, between start and end.
 
-        restart, if nonzero, means that there were too many results to
+        'restart', if not None, means that there were too many results
-        return in a single request.  The data is complete from the
+        to return in a single request.  The data is complete from the
-        starting timestamp to the point at which it was truncated,
+        starting timestamp to the point at which it was truncated, and
-        and a new request with a start time of 'restart' will fetch
+        a new request with a start time of 'restart' will fetch the
-        the next block of data.
+        next block of data.
         """
         stream_id = self._stream_id(path)
         intervals = self._get_intervals(stream_id)
+        if diffpath:
+            diffstream_id = self._stream_id(diffpath)
+            diffintervals = self._get_intervals(diffstream_id)
         (start, end) = self._check_user_times(start, end)
         requested = Interval(start, end)
         result = []
-        for n, i in enumerate(intervals.intersection(requested)):
+        if diffpath:
+            getter = nilmdb.utils.interval.set_difference(
+                intervals.intersection(requested),
+                diffintervals.intersection(requested))
+        else:
+            getter = intervals.intersection(requested)
+        for n, i in enumerate(getter):
             if n >= self.max_results:
                 restart = i.start
                 break
             result.append([i.start, i.end])
         else:
-            restart = 0
+            restart = None
         return (result, restart)
 
     def stream_create(self, path, layout_name):
@@ -390,18 +437,35 @@ class NilmDB(object):
         data.update(newdata)
         self.stream_set_metadata(path, data)
 
+    def stream_rename(self, oldpath, newpath):
+        """Rename a stream."""
+        stream_id = self._stream_id(oldpath)
+
+        # Rename the data
+        self.data.rename(oldpath, newpath)
+
+        # Rename the stream in the database
+        with self.con as con:
+            con.execute("UPDATE streams SET path=? WHERE id=?",
+                        (newpath, stream_id))
+
     def stream_destroy(self, path):
-        """Fully remove a table and all of its data from the database.
+        """Fully remove a table from the database.  Fails if there are
-        No way to undo it!  Metadata is removed."""
+        any intervals data present; remove them first.  Metadata is
+        also removed."""
         stream_id = self._stream_id(path)
 
-        # Delete the cached interval data (if it was cached)
+        # Verify that no intervals are present, and clear the cache
+        iset = self._get_intervals(stream_id)
+        if len(iset):
+            raise NilmDBError("all intervals must be removed before "
+                              "destroying a stream")
         self._get_intervals.cache_remove(self, stream_id)
 
-        # Delete the data
+        # Delete the bulkdata storage
         self.data.destroy(path)
 
-        # Delete metadata, stream, intervals
+        # Delete metadata, stream, intervals (should be none)
         with self.con as con:
             con.execute("DELETE FROM metadata WHERE stream_id=?", (stream_id,))
             con.execute("DELETE FROM ranges WHERE stream_id=?", (stream_id,))
@@ -412,8 +476,7 @@ class NilmDB(object):
            path: Path at which to add the data
            start: Starting timestamp
            end: Ending timestamp
-           data: Rows of data, to be passed to bulkdata table.append
+           data: Textual data, formatted according to the layout of path
-                 method.  E.g. nilmdb.layout.Parser.data
            """
         # First check for basic overlap using timestamp info given.
         stream_id = self._stream_id(path)
@@ -423,10 +486,11 @@ class NilmDB(object):
             raise OverlapError("new data overlaps existing data at range: "
                                + str(iset & interval))
 
-        # Insert the data
+        # Tenatively append the data.  This will raise a ValueError if
+        # there are any parse errors.
         table = self.data.getnode(path)
         row_start = table.nrows
-        table.append(data)
+        table.append_string(data, start, end)
         row_end = table.nrows
 
         # Insert the record into the sql database.
@@ -445,7 +509,7 @@ class NilmDB(object):
         # Optimization for the common case where an interval wasn't truncated
         if dbinterval.start == dbinterval.db_start:
             return dbinterval.db_startpos
-        return bisect.bisect_left(bulkdata.TimestampOnlyTable(table),
+        return bisect.bisect_left(table,
                                   dbinterval.start,
                                   dbinterval.db_startpos,
                                   dbinterval.db_endpos)
@@ -464,7 +528,7 @@ class NilmDB(object):
         # want to include the given timestamp in the results.  This is
         # so a queries like 1:00 -> 2:00 and 2:00 -> 3:00 return
         # non-overlapping data.
-        return bisect.bisect_left(bulkdata.TimestampOnlyTable(table),
+        return bisect.bisect_left(table,
                                   dbinterval.end,
                                   dbinterval.db_startpos,
                                   dbinterval.db_endpos)
@@ -473,11 +537,10 @@ class NilmDB(object):
         """
         Returns (data, restart) tuple.
 
-        data is a list of raw data from the database, suitable for
+        'data' is ASCII-formatted data from the database, formatted
-        passing to e.g. nilmdb.layout.Formatter to translate into
+        according to the layout of the stream.
-        textual form.
 
-        restart, if nonzero, means that there were too many results to
+        'restart', if not None, means that there were too many results to
         return in a single request.  The data is complete from the
         starting timestamp to the point at which it was truncated,
         and a new request with a start time of 'restart' will fetch
@@ -496,7 +559,7 @@ class NilmDB(object):
         result = []
         matched = 0
         remaining = self.max_results
-        restart = 0
+        restart = None
         for interval in intervals.intersection(requested):
             # Reading single rows from the table is too slow, so
             # we use two bisections to find both the starting and
@@ -513,27 +576,35 @@ class NilmDB(object):
             row_max = row_start + remaining
             if row_max < row_end:
                 row_end = row_max
-                restart = table[row_max][0]
+                restart = table[row_max]
 
             # Gather these results up
-            result.extend(table[row_start:row_end])
+            result.append(table.get_data(row_start, row_end))
 
             # Count them
             remaining -= row_end - row_start
 
-            if restart:
+            if restart is not None:
                 break
 
         if count:
             return matched
-        return (result, restart)
+        return ("".join(result), restart)
 
     def stream_remove(self, path, start = None, end = None):
         """
         Remove data from the specified time interval within a stream.
-        Removes all data in the interval [start, end), and intervals
+
-        are truncated or split appropriately.  Returns the number of
+        Removes data in the interval [start, end), and intervals are
-        data points removed.
+        truncated or split appropriately.
+
+        Returns a (removed, restart) tuple.
+
+        'removed' is the number of data points that were removed.
+
+        'restart', if not None, means there were too many rows to
+        remove in a single request.  This function should be called
+        again with a start time of 'restart' to complete the removal.
         """
         stream_id = self._stream_id(path)
         table = self.data.getnode(path)
@@ -541,6 +612,8 @@ class NilmDB(object):
         (start, end) = self._check_user_times(start, end)
         to_remove = Interval(start, end)
         removed = 0
+        remaining = self.max_removals
+        restart = None
 
         # Can't remove intervals from within the iterator, so we need to
         # remember what's currently in the intersection now.
@@ -551,6 +624,13 @@ class NilmDB(object):
             row_start = self._find_start(table, dbint)
             row_end = self._find_end(table, dbint)
 
+            # Shorten it if we'll hit the maximum number of removals
+            row_max = row_start + remaining
+            if row_max < row_end:
+                row_end = row_max
+                dbint.end = table[row_max]
+                restart = dbint.end
+
             # Adjust the DBInterval to match the newly found ends
             dbint.db_start = dbint.start
             dbint.db_end = dbint.end
@@ -566,4 +646,7 @@ class NilmDB(object):
             # Count how many were removed
             removed += row_end - row_start
 
-        return removed
+            if restart is not None:
+                break
+
+        return (removed, restart)

nilmdb/server/rocket.c

@@ -0,0 +1,657 @@
+#include <Python.h>
+#include <structmember.h>
+#include <endian.h>
+
+#include <ctype.h>
+#include <stdint.h>
+
+/* Values missing from stdint.h */
+#define UINT8_MIN 0
+#define UINT16_MIN 0
+#define UINT32_MIN 0
+#define UINT64_MIN 0
+
+/* Marker values (if min == max, skip range check) */
+#define FLOAT32_MIN 0
+#define FLOAT32_MAX 0
+#define FLOAT64_MIN 0
+#define FLOAT64_MAX 0
+
+typedef int64_t timestamp_t;
+
+/* This code probably needs to be double-checked for the case where
+   sizeof(long) != 8, so enforce that here with something that will
+   fail at build time.  We assume that the python integer type can
+   hold an int64_t. */
+const static char __long_ok[1 - 2*!(sizeof(int64_t) ==
+				    sizeof(long int))] = { 0 };
+
+/* Somewhat arbitrary, just so we can use fixed sizes for strings
+   etc. */
+static const int MAX_LAYOUT_COUNT = 128;
+
+/* Error object and constants */
+static PyObject *ParseError;
+typedef enum {
+	ERR_OTHER,
+	ERR_NON_MONOTONIC,
+	ERR_OUT_OF_INTERVAL,
+} parseerror_code_t;
+static void add_parseerror_codes(PyObject *module)
+{
+	PyModule_AddIntMacro(module, ERR_OTHER);
+	PyModule_AddIntMacro(module, ERR_NON_MONOTONIC);
+	PyModule_AddIntMacro(module, ERR_OUT_OF_INTERVAL);
+}
+
+/* Helpers to raise ParseErrors.  Use "return raise_str(...)" etc. */
+static PyObject *raise_str(int line, int col, int code, const char *string)
+{
+	PyObject *o;
+	o = Py_BuildValue("(iiis)", line, col, code, string);
+	if (o != NULL) {
+		PyErr_SetObject(ParseError, o);
+		Py_DECREF(o);
+	}
+	return NULL;
+}
+static PyObject *raise_int(int line, int col, int code, int64_t num)
+{
+	PyObject *o;
+	o = Py_BuildValue("(iiil)", line, col, code, num);
+	if (o != NULL) {
+		PyErr_SetObject(ParseError, o);
+		Py_DECREF(o);
+	}
+	return NULL;
+}
+
+/****
+ * Layout and type helpers
+ */
+typedef union {
+	int8_t i;
+	uint8_t u;
+} union8_t;
+typedef union {
+	int16_t i;
+	uint16_t u;
+} union16_t;
+typedef union {
+	int32_t i;
+	uint32_t u;
+	float f;
+} union32_t;
+typedef union {
+	int64_t i;
+	uint64_t u;
+	double d;
+} union64_t;
+
+typedef enum {
+	LAYOUT_TYPE_NONE,
+	LAYOUT_TYPE_INT8,
+	LAYOUT_TYPE_UINT8,
+	LAYOUT_TYPE_INT16,
+	LAYOUT_TYPE_UINT16,
+	LAYOUT_TYPE_INT32,
+	LAYOUT_TYPE_UINT32,
+	LAYOUT_TYPE_INT64,
+	LAYOUT_TYPE_UINT64,
+	LAYOUT_TYPE_FLOAT32,
+	LAYOUT_TYPE_FLOAT64,
+} layout_type_t;
+
+struct {
+	char *string;
+	layout_type_t layout;
+	int size;
+} type_lookup[] = {
+	{ "int8",    LAYOUT_TYPE_INT8,    1 },
+	{ "uint8",   LAYOUT_TYPE_UINT8,   1 },
+	{ "int16",   LAYOUT_TYPE_INT16,   2 },
+	{ "uint16",  LAYOUT_TYPE_UINT16,  2 },
+	{ "int32",   LAYOUT_TYPE_INT32,   4 },
+	{ "uint32",  LAYOUT_TYPE_UINT32,  4 },
+	{ "int64",   LAYOUT_TYPE_INT64,   8 },
+	{ "uint64",  LAYOUT_TYPE_UINT64,  8 },
+	{ "float32", LAYOUT_TYPE_FLOAT32, 4 },
+	{ "float64", LAYOUT_TYPE_FLOAT64, 8 },
+	{ NULL }
+};
+
+/****
+ * Object definition, init, etc
+ */
+
+/* Rocket object */
+typedef struct {
+	PyObject_HEAD
+	layout_type_t layout_type;
+	int layout_count;
+	int binary_size;
+	FILE *file;
+	int file_size;
+} Rocket;
+
+/* Dealloc / new */
+static void Rocket_dealloc(Rocket *self)
+{
+	if (self->file) {
+		fprintf(stderr, "rocket: file wasn't closed\n");
+		fclose(self->file);
+		self->file = NULL;
+	}
+	self->ob_type->tp_free((PyObject *)self);
+}
+
+static PyObject *Rocket_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
+{
+	Rocket *self;
+
+	self = (Rocket *)type->tp_alloc(type, 0);
+	if (!self)
+		return NULL;
+	self->layout_type = LAYOUT_TYPE_NONE;
+	self->layout_count = 0;
+	self->binary_size = 0;
+	self->file = NULL;
+	self->file_size = -1;
+	return (PyObject *)self;
+}
+
+/* .__init__(layout, file) */
+static int Rocket_init(Rocket *self, PyObject *args, PyObject *kwds)
+{
+	const char *layout, *path;
+	static char *kwlist[] = { "layout", "file", NULL };
+	if (!PyArg_ParseTupleAndKeywords(args, kwds, "sz", kwlist,
+					 &layout, &path))
+		return -1;
+	if (!layout)
+		return -1;
+	if (path) {
+		if ((self->file = fopen(path, "a+b")) == NULL) {
+			PyErr_SetFromErrno(PyExc_OSError);
+			return -1;
+		}
+		self->file_size = -1;
+	} else {
+		self->file = NULL;
+	}
+
+	const char *under;
+	char *tmp;
+	under = strchr(layout, '_');
+	if (!under) {
+		PyErr_SetString(PyExc_ValueError, "no such layout: "
+				"badly formatted string");
+		return -1;
+	}
+	self->layout_count = strtoul(under+1, &tmp, 10);
+	if (self->layout_count < 1 || *tmp != '\0') {
+		PyErr_SetString(PyExc_ValueError, "no such layout: "
+				"bad count");
+		return -1;
+	}
+	if (self->layout_count >= MAX_LAYOUT_COUNT) {
+		PyErr_SetString(PyExc_ValueError, "no such layout: "
+				"count too high");
+		return -1;
+	}
+
+	int i;
+	for (i = 0; type_lookup[i].string; i++)
+		if (strncmp(layout, type_lookup[i].string, under-layout) == 0)
+			break;
+	if (!type_lookup[i].string) {
+		PyErr_SetString(PyExc_ValueError, "no such layout: "
+				"bad data type");
+		return -1;
+	}
+	self->layout_type = type_lookup[i].layout;
+	self->binary_size = 8 + (type_lookup[i].size * self->layout_count);
+
+	return 0;
+}
+
+/* .close() */
+static PyObject *Rocket_close(Rocket *self)
+{
+	if (self->file) {
+		fclose(self->file);
+		self->file = NULL;
+	}
+	Py_INCREF(Py_None);
+	return Py_None;
+}
+
+/* .file_size property */
+static PyObject *Rocket_get_file_size(Rocket *self)
+{
+	if (!self->file) {
+		PyErr_SetString(PyExc_AttributeError, "no file");
+		return NULL;
+	}
+	if (self->file_size < 0) {
+		int oldpos;
+		if (((oldpos = ftell(self->file)) < 0) ||
+		    (fseek(self->file, 0, SEEK_END) < 0) ||
+		    ((self->file_size = ftell(self->file)) < 0) ||
+		    (fseek(self->file, oldpos, SEEK_SET) < 0)) {
+			PyErr_SetFromErrno(PyExc_OSError);
+			return NULL;
+		}
+	}
+	return PyInt_FromLong(self->file_size);
+}
+
+/****
+ * Append from string
+ */
+static inline long int strtol10(const char *nptr, char **endptr) {
+	return strtol(nptr, endptr, 10);
+}
+static inline long int strtoul10(const char *nptr, char **endptr) {
+	return strtoul(nptr, endptr, 10);
+}
+
+/* .append_string(count, data, offset, linenum, start, end, last_timestamp) */
+static PyObject *Rocket_append_string(Rocket *self, PyObject *args)
+{
+	int count;
+	const char *data;
+	int offset;
+	const char *linestart;
+	int linenum;
+	timestamp_t start;
+	timestamp_t end;
+	timestamp_t last_timestamp;
+
+	int written = 0;
+	char *endptr;
+	union8_t t8;
+	union16_t t16;
+	union32_t t32;
+	union64_t t64;
+	int i;
+
+	/* It would be nice to use 't#' instead of 's' for data,
+	   but we need the null termination for strto*.  If we had
+	   strnto* that took a length, we could use t# and not require
+	   a copy. */
+	if (!PyArg_ParseTuple(args, "isiilll:append_string", &count,
+			      &data, &offset, &linenum,
+			      &start, &end, &last_timestamp))
+		return NULL;
+
+	/* Skip spaces, but don't skip over a newline. */
+#define SKIP_BLANK(buf) do {			\
+	while (isspace(*buf)) {			\
+		if (*buf == '\n')		\
+			break;			\
+		buf++;				\
+	} } while(0)
+
+	const char *buf = &data[offset];
+	while (written < count && *buf)
+	{
+		linestart = buf;
+		linenum++;
+
+		/* Skip leading whitespace and commented lines */
+		SKIP_BLANK(buf);
+		if (*buf == '#') {
+			while (*buf && *buf != '\n')
+				buf++;
+			if (*buf)
+				buf++;
+			continue;
+		}
+
+		/* Extract timestamp */
+		t64.i = strtoll(buf, &endptr, 10);
+		if (endptr == buf || !isspace(*endptr)) {
+			/* Try parsing as a double instead */
+			t64.d = strtod(buf, &endptr);
+			if (endptr == buf)
+				goto bad_timestamp;
+			if (!isspace(*endptr))
+				goto cant_parse_value;
+			t64.i = round(t64.d);
+		}
+		if (t64.i <= last_timestamp)
+			return raise_int(linenum, buf - linestart + 1,
+					 ERR_NON_MONOTONIC, t64.i);
+		last_timestamp = t64.i;
+		if (t64.i < start || t64.i >= end)
+			return raise_int(linenum, buf - linestart + 1,
+					 ERR_OUT_OF_INTERVAL, t64.i);
+		t64.u = le64toh(t64.u);
+		if (fwrite(&t64.u, 8, 1, self->file) != 1)
+			goto err;
+		buf = endptr;
+
+		/* Parse all values in the line */
+		switch (self->layout_type) {
+#define CS(type, parsefunc, parsetype, realtype, disktype, letoh, bytes) \
+		case LAYOUT_TYPE_##type:				\
+			/* parse and write in a loop */			\
+			for (i = 0; i < self->layout_count; i++) {	\
+				/* skip non-newlines */			\
+				SKIP_BLANK(buf);			\
+				if (*buf == '\n')			\
+					goto wrong_number_of_values;	\
+				/* parse number */			\
+				parsetype = parsefunc(buf, &endptr);	\
+				if (*endptr && !isspace(*endptr))	\
+					goto cant_parse_value;		\
+				/* check limits */			\
+				if (type##_MIN != type##_MAX &&		\
+				    (parsetype < type##_MIN ||		\
+				     parsetype > type##_MAX))		\
+					goto value_out_of_range;	\
+				/* convert to disk representation */	\
+				realtype = parsetype;			\
+				disktype = letoh(disktype);		\
+				/* write it */				\
+				if (fwrite(&disktype, bytes,		\
+					   1, self->file) != 1)		\
+					goto err;			\
+				/* advance buf */			\
+				buf = endptr;				\
+			}						\
+			/* Skip trailing whitespace and comments */	\
+			SKIP_BLANK(buf);				\
+			if (*buf == '#')				\
+				while (*buf && *buf != '\n')		\
+					buf++;				\
+			if (*buf == '\n')				\
+				buf++;					\
+			else if (*buf != '\0')				\
+				goto extra_data_on_line;		\
+			break
+
+			CS(INT8,   strtol10,  t64.i, t8.i,  t8.u,         , 1);
+			CS(UINT8,  strtoul10, t64.u, t8.u,  t8.u,         , 1);
+			CS(INT16,  strtol10,  t64.i, t16.i, t16.u, le16toh, 2);
+			CS(UINT16, strtoul10, t64.u, t16.u, t16.u, le16toh, 2);
+			CS(INT32,  strtol10,  t64.i, t32.i, t32.u, le32toh, 4);
+			CS(UINT32, strtoul10, t64.u, t32.u, t32.u, le32toh, 4);
+			CS(INT64,  strtol10,  t64.i, t64.i, t64.u, le64toh, 8);
+			CS(UINT64, strtoul10, t64.u, t64.u, t64.u, le64toh, 8);
+			CS(FLOAT32, strtod,   t64.d, t32.f, t32.u, le32toh, 4);
+			CS(FLOAT64, strtod,   t64.d, t64.d, t64.u, le64toh, 8);
+#undef CS
+		default:
+			PyErr_SetString(PyExc_TypeError, "unknown type");
+			return NULL;
+		}
+
+		/* Done this line */
+		written++;
+	}
+
+	fflush(self->file);
+
+	/* Build return value and return */
+	offset = buf - data;
+	PyObject *o;
+	o = Py_BuildValue("(iili)", written, offset, last_timestamp, linenum);
+	return o;
+err:
+	PyErr_SetFromErrno(PyExc_OSError);
+	return NULL;
+bad_timestamp:
+	return raise_str(linenum, buf - linestart + 1,
+			 ERR_OTHER, "bad timestamp");
+cant_parse_value:
+	return raise_str(linenum, buf - linestart + 1,
+			 ERR_OTHER, "can't parse value");
+wrong_number_of_values:
+	return raise_str(linenum, buf - linestart + 1,
+			 ERR_OTHER, "wrong number of values");
+value_out_of_range:
+	return raise_str(linenum, buf - linestart + 1,
+			 ERR_OTHER, "value out of range");
+extra_data_on_line:
+	return raise_str(linenum, buf - linestart + 1,
+			 ERR_OTHER, "extra data on line");
+}
+
+/****
+ * Extract to string
+ */
+
+static PyObject *Rocket_extract_string(Rocket *self, PyObject *args)
+{
+	long count;
+	long offset;
+
+	if (!PyArg_ParseTuple(args, "ll", &offset, &count))
+		return NULL;
+	if (!self->file) {
+		PyErr_SetString(PyExc_Exception, "no file");
+		return NULL;
+	}
+	/* Seek to target location */
+	if (fseek(self->file, offset, SEEK_SET) < 0) {
+		PyErr_SetFromErrno(PyExc_OSError);
+		return NULL;
+	}
+
+	char *str = NULL, *new;
+	long len_alloc = 0;
+	long len = 0;
+	int ret;
+
+	/* min space free in string (and the maximum length of one
+	   line); this is generous */
+	const int min_free = 32 * MAX_LAYOUT_COUNT;
+
+	/* how much to allocate at once */
+	const int alloc_size = 1048576;
+
+	int row, i;
+	union8_t t8;
+	union16_t t16;
+	union32_t t32;
+	union64_t t64;
+	for (row = 0; row < count; row++) {
+		/* Make sure there's space for a line */
+		if ((len_alloc - len) < min_free) {
+			/* grow by 1 meg at a time */
+			len_alloc += alloc_size;
+			new = realloc(str, len_alloc);
+			if (new == NULL)
+				goto err;
+			str = new;
+		}
+
+		/* Read and print timestamp */
+		if (fread(&t64.u, 8, 1, self->file) != 1)
+			goto err;
+		t64.u = le64toh(t64.u);
+		ret = sprintf(&str[len], "%ld", t64.i);
+		if (ret <= 0)
+			goto err;
+		len += ret;
+
+		/* Read and print values */
+		switch (self->layout_type) {
+#define CASE(type, fmt, fmttype, disktype, letoh, bytes)		\
+		case LAYOUT_TYPE_##type:				\
+			/* read and format in a loop */			\
+			for (i = 0; i < self->layout_count; i++) {	\
+				if (fread(&disktype, bytes,		\
+					  1, self->file) < 0)		\
+					goto err;			\
+				disktype = letoh(disktype);		\
+				ret = sprintf(&str[len], " " fmt,	\
+					      fmttype);			\
+				if (ret <= 0)				\
+					goto err;			\
+				len += ret;				\
+			}						\
+			break
+			CASE(INT8,   "%hhd",   t8.i,  t8.u,         , 1);
+			CASE(UINT8,  "%hhu",   t8.u,  t8.u,         , 1);
+			CASE(INT16,  "%hd",    t16.i, t16.u, le16toh, 2);
+			CASE(UINT16, "%hu",    t16.u, t16.u, le16toh, 2);
+			CASE(INT32,  "%d",     t32.i, t32.u, le32toh, 4);
+			CASE(UINT32, "%u",     t32.u, t32.u, le32toh, 4);
+			CASE(INT64,  "%ld",    t64.i, t64.u, le64toh, 8);
+			CASE(UINT64, "%lu",    t64.u, t64.u, le64toh, 8);
+			/* These next two are a bit debatable.  floats
+			   are 6-9 significant figures, so we print 7.
+			   Doubles are 15-19, so we print 17.  This is
+			   similar to the old prep format for float32.
+			*/
+			CASE(FLOAT32, "%.6e",  t32.f, t32.u, le32toh, 4);
+			CASE(FLOAT64, "%.16e", t64.d, t64.u, le64toh, 8);
+#undef CASE
+		default:
+			PyErr_SetString(PyExc_TypeError, "unknown type");
+			if (str) free(str);
+			return NULL;
+		}
+		str[len++] = '\n';
+	}
+
+	PyObject *pystr = PyString_FromStringAndSize(str, len);
+	free(str);
+	return pystr;
+err:
+	if (str) free(str);
+	PyErr_SetFromErrno(PyExc_OSError);
+	return NULL;
+}
+
+
+/****
+ * Extract timestamp
+ */
+static PyObject *Rocket_extract_timestamp(Rocket *self, PyObject *args)
+{
+	long offset;
+	union64_t t64;
+	if (!PyArg_ParseTuple(args, "l", &offset))
+		return NULL;
+	if (!self->file) {
+		PyErr_SetString(PyExc_Exception, "no file");
+		return NULL;
+	}
+
+	/* Seek to target location and read timestamp */
+	if ((fseek(self->file, offset, SEEK_SET) < 0) ||
+	    (fread(&t64.u, 8, 1, self->file) != 1)) {
+		PyErr_SetFromErrno(PyExc_OSError);
+		return NULL;
+	}
+
+	/* Convert and return */
+	t64.u = le64toh(t64.u);
+	return Py_BuildValue("l", t64.i);
+}
+
+/****
+ * Module and type setup
+ */
+
+static PyGetSetDef Rocket_getsetters[] = {
+	{ "file_size", (getter)Rocket_get_file_size, NULL,
+	  "file size in bytes", NULL },
+	{ NULL },
+};
+
+static PyMemberDef Rocket_members[] = {
+	{ "binary_size", T_INT, offsetof(Rocket, binary_size), 0,
+	  "binary size per row" },
+	{ NULL },
+};
+
+static PyMethodDef Rocket_methods[] = {
+	{ "close", (PyCFunction)Rocket_close, METH_NOARGS,
+	  "close(self)\n\n"
+	  "Close file handle" },
+
+	{ "append_string", (PyCFunction)Rocket_append_string, METH_VARARGS,
+	  "append_string(self, count, data, offset, line, start, end, ts)\n\n"
+          "Parse string and append data.\n"
+	  "\n"
+	  "  count: maximum number of rows to add\n"
+          "  data: string data\n"
+          "  offset: byte offset into data to start parsing\n"
+          "  line: current line number of data\n"
+          "  start: starting timestamp for interval\n"
+          "  end: end timestamp for interval\n"
+          "  ts: last timestamp that was previously parsed\n"
+	  "\n"
+	  "Raises ParseError if timestamps are non-monotonic, outside\n"
+	  "the start/end interval etc.\n"
+	  "\n"
+          "On success, return a tuple with three values:\n"
+          "  added_rows: how many rows were added from the file\n"
+          "  data_offset: current offset into the data string\n"
+          "  last_timestamp: last timestamp we parsed" },
+
+	{ "extract_string", (PyCFunction)Rocket_extract_string, METH_VARARGS,
+	  "extract_string(self, offset, count)\n\n"
+	  "Extract count rows of data from the file at offset offset.\n"
+	  "Return an ascii formatted string according to the layout" },
+
+	{ "extract_timestamp",
+	  (PyCFunction)Rocket_extract_timestamp, METH_VARARGS,
+	  "extract_timestamp(self, offset)\n\n"
+	  "Extract a single timestamp from the file" },
+
+	{ NULL },
+};
+
+static PyTypeObject RocketType = {
+	PyObject_HEAD_INIT(NULL)
+
+	.tp_name	= "rocket.Rocket",
+	.tp_basicsize	= sizeof(Rocket),
+	.tp_flags	= Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
+
+	.tp_new		= Rocket_new,
+	.tp_dealloc	= (destructor)Rocket_dealloc,
+	.tp_init	= (initproc)Rocket_init,
+	.tp_methods	= Rocket_methods,
+	.tp_members	= Rocket_members,
+	.tp_getset	= Rocket_getsetters,
+
+	.tp_doc		= ("rocket.Rocket(layout, file)\n\n"
+			   "C implementation of the \"rocket\" data parsing\n"
+			   "interface, which translates between the binary\n"
+			   "format on disk and the ASCII or Python list\n"
+			   "format used when communicating with the rest of\n"
+			   "the system.")
+};
+
+static PyMethodDef module_methods[] = {
+	{ NULL },
+};
+
+PyMODINIT_FUNC
+initrocket(void)
+{
+	PyObject *module;
+
+	RocketType.tp_new = PyType_GenericNew;
+	if (PyType_Ready(&RocketType) < 0)
+		return;
+
+	module = Py_InitModule3("rocket", module_methods,
+				"Rocket data parsing and formatting module");
+	Py_INCREF(&RocketType);
+	PyModule_AddObject(module, "Rocket", (PyObject *)&RocketType);
+
+	ParseError = PyErr_NewException("rocket.ParseError", NULL, NULL);
+	Py_INCREF(ParseError);
+	PyModule_AddObject(module, "ParseError", ParseError);
+	add_parseerror_codes(module);
+
+	return;
+}

nilmdb/server/server.py

@@ -3,16 +3,16 @@
 # Need absolute_import so that "import nilmdb" won't pull in
 # nilmdb.py, but will pull the nilmdb module instead.
 from __future__ import absolute_import
-import nilmdb
+import nilmdb.server
 from nilmdb.utils.printf import *
 from nilmdb.server.errors import NilmDBError
+from nilmdb.utils.time import string_to_timestamp
 
 import cherrypy
 import sys
 import os
 import simplejson as json
 import decorator
-import traceback
 import psutil
 
 class NilmApp(object):
@@ -45,12 +45,17 @@ def workaround_cp_bug_1200(func, *args, **kwargs): # pragma: no cover
     bug #1200.  This throws them as generic Exceptions instead so that
     they make it through.
     """
+    exc_info = None
     try:
         for val in func(*args, **kwargs):
             yield val
     except (LookupError, UnicodeError):
-        raise Exception("bug workaround; real exception is:\n" +
+        # Re-raise it, but maintain the original traceback
-                        traceback.format_exc())
+        exc_info = sys.exc_info()
+        new_exc = Exception(exc_info[0].__name__ + ": " + str(exc_info[1]))
+        raise new_exc, None, exc_info[2]
+    finally:
+        del exc_info
 
 def exception_to_httperror(*expected):
     """Return a decorator-generating function that catches expected
@@ -61,11 +66,16 @@ def exception_to_httperror(*expected):
             pass
     """
     def wrapper(func, *args, **kwargs):
+        exc_info = None
         try:
             return func(*args, **kwargs)
-        except expected as e:
+        except expected:
-            message = sprintf("%s", str(e))
+            # Re-raise it, but maintain the original traceback
-            raise cherrypy.HTTPError("400 Bad Request", message)
+            exc_info = sys.exc_info()
+            new_exc = cherrypy.HTTPError("400 Bad Request", str(exc_info[1]))
+            raise new_exc, None, exc_info[2]
+        finally:
+            del exc_info
     # We need to preserve the function's argspecs for CherryPy to
     # handle argument errors correctly.  Decorator.decorator takes
     # care of that.
@@ -117,6 +127,14 @@ def CORS_allow(methods):
 
 cherrypy.tools.CORS_allow = cherrypy.Tool('on_start_resource', CORS_allow)
 
+# Helper for json_in tool to process JSON data into normal request
+# parameters.
+def json_to_request_params(body):
+    cherrypy.lib.jsontools.json_processor(body)
+    if not isinstance(cherrypy.request.json, dict):
+        raise cherrypy.HTTPError(415)
+    cherrypy.request.params.update(cherrypy.request.json)
+
 # CherryPy apps
 class Root(NilmApp):
     """Root application for NILM database"""
@@ -155,11 +173,11 @@ class Stream(NilmApp):
     """Stream-specific operations"""
 
     # /stream/list
-    # /stream/list?layout=PrepData
+    # /stream/list?layout=float32_8
-    # /stream/list?path=/newton/prep&extent=1
+    # /stream/list?path=/newton/prep&extended=1
     @cherrypy.expose
     @cherrypy.tools.json_out()
-    def list(self, path = None, layout = None, extent = None):
+    def list(self, path = None, layout = None, extended = None):
         """List all streams in the database.  With optional path or
         layout parameter, just list streams that match the given path
         or layout.
@@ -167,14 +185,15 @@ class Stream(NilmApp):
         If extent is not given, returns a list of lists containing
         the path and layout: [ path, layout ]
 
-        If extent is provided, returns a list of lists containing the
+        If extended is provided, returns a list of lists containing
-        path, layout, and min/max extent of the data:
+        extended info: [ path, layout, extent_min, extent_max,
-        [ path, layout, extent_min, extent_max ]
+        total_rows, total_seconds ].  More data may be added.
         """
-        return self.db.stream_list(path, layout, bool(extent))
+        return self.db.stream_list(path, layout, bool(extended))
 
-    # /stream/create?path=/newton/prep&layout=PrepData
+    # /stream/create?path=/newton/prep&layout=float32_8
     @cherrypy.expose
+    @cherrypy.tools.json_in()
     @cherrypy.tools.json_out()
     @exception_to_httperror(NilmDBError, ValueError)
     @cherrypy.tools.CORS_allow(methods = ["POST"])
@@ -186,13 +205,24 @@ class Stream(NilmApp):
 
     # /stream/destroy?path=/newton/prep
     @cherrypy.expose
+    @cherrypy.tools.json_in()
     @cherrypy.tools.json_out()
     @exception_to_httperror(NilmDBError)
     @cherrypy.tools.CORS_allow(methods = ["POST"])
     def destroy(self, path):
-        """Delete a stream and its associated data."""
+        """Delete a stream.  Fails if any data is still present."""
         return self.db.stream_destroy(path)
 
+    # /stream/rename?oldpath=/newton/prep&newpath=/newton/prep/1
+    @cherrypy.expose
+    @cherrypy.tools.json_in()
+    @cherrypy.tools.json_out()
+    @exception_to_httperror(NilmDBError, ValueError)
+    @cherrypy.tools.CORS_allow(methods = ["POST"])
+    def rename(self, oldpath, newpath):
+        """Rename a stream."""
+        return self.db.stream_rename(oldpath, newpath)
+
     # /stream/get_metadata?path=/newton/prep
     # /stream/get_metadata?path=/newton/prep&key=foo&key=bar
     @cherrypy.expose
@@ -217,32 +247,46 @@ class Stream(NilmApp):
                 result[k] = None
         return result
 
+    # Helper for set_metadata and get_metadata
+    def _metadata_helper(self, function, path, data):
+        if not isinstance(data, dict):
+            try:
+                data = dict(json.loads(data))
+            except TypeError as e:
+                raise NilmDBError("can't parse 'data' parameter: " + e.message)
+        for key in data:
+            if not (isinstance(data[key], basestring) or
+                    isinstance(data[key], float) or
+                    isinstance(data[key], int)):
+                raise NilmDBError("metadata values must be a string or number")
+        function(path, data)
+
     # /stream/set_metadata?path=/newton/prep&data=<json>
     @cherrypy.expose
+    @cherrypy.tools.json_in()
     @cherrypy.tools.json_out()
-    @exception_to_httperror(NilmDBError, LookupError, TypeError)
+    @exception_to_httperror(NilmDBError, LookupError)
     @cherrypy.tools.CORS_allow(methods = ["POST"])
     def set_metadata(self, path, data):
-        """Set metadata for the named stream, replacing any
+        """Set metadata for the named stream, replacing any existing
-        existing metadata.  Data should be a json-encoded
+        metadata.  Data can be json-encoded or a plain dictionary."""
-        dictionary"""
+        self._metadata_helper(self.db.stream_set_metadata, path, data)
-        data_dict = json.loads(data)
-        self.db.stream_set_metadata(path, data_dict)
 
     # /stream/update_metadata?path=/newton/prep&data=<json>
     @cherrypy.expose
+    @cherrypy.tools.json_in()
     @cherrypy.tools.json_out()
-    @exception_to_httperror(NilmDBError, LookupError, TypeError)
+    @exception_to_httperror(NilmDBError, LookupError, ValueError)
     @cherrypy.tools.CORS_allow(methods = ["POST"])
     def update_metadata(self, path, data):
-        """Update metadata for the named stream.  Data
+        """Set metadata for the named stream, replacing any existing
-        should be a json-encoded dictionary"""
+        metadata.  Data can be json-encoded or a plain dictionary."""
-        data_dict = json.loads(data)
+        self._metadata_helper(self.db.stream_update_metadata, path, data)
-        self.db.stream_update_metadata(path, data_dict)
 
     # /stream/insert?path=/newton/prep
     @cherrypy.expose
     @cherrypy.tools.json_out()
+    @exception_to_httperror(NilmDBError, ValueError)
     @cherrypy.tools.CORS_allow(methods = ["PUT"])
     def insert(self, path, start, end):
         """
@@ -259,37 +303,17 @@ class Stream(NilmApp):
         streams = self.db.stream_list(path = path)
         if len(streams) != 1:
             raise cherrypy.HTTPError("404 Not Found", "No such stream")
-        layout = streams[0][1]
-
-        # Parse the input data
-        try:
-            parser = nilmdb.server.layout.Parser(layout)
-            parser.parse(body)
-        except nilmdb.server.layout.ParserError as e:
-            raise cherrypy.HTTPError("400 Bad Request",
-                                     "error parsing input data: " +
-                                     e.message)
 
         # Check limits
-        start = float(start)
+        start = string_to_timestamp(start)
-        end = float(end)
+        end = string_to_timestamp(end)
         if start >= end:
             raise cherrypy.HTTPError("400 Bad Request",
                                      "start must precede end")
-        if parser.min_timestamp is not None and parser.min_timestamp < start:
-            raise cherrypy.HTTPError("400 Bad Request", "Data timestamp " +
-                                     repr(parser.min_timestamp) +
-                                     " < start time " + repr(start))
-        if parser.max_timestamp is not None and parser.max_timestamp >= end:
-            raise cherrypy.HTTPError("400 Bad Request", "Data timestamp " +
-                                     repr(parser.max_timestamp) +
-                                     " >= end time " + repr(end))
 
-        # Now do the nilmdb insert, passing it the parser full of data.
+        # Pass the data directly to nilmdb, which will parse it and
-        try:
+        # raise a ValueError if there are any problems.
-            self.db.stream_insert(path, start, end, parser.data)
+        self.db.stream_insert(path, start, end, body)
-        except NilmDBError as e:
-            raise cherrypy.HTTPError("400 Bad Request", e.message)
 
         # Done
         return
@@ -297,6 +321,7 @@ class Stream(NilmApp):
     # /stream/remove?path=/newton/prep
     # /stream/remove?path=/newton/prep&start=1234567890.0&end=1234567899.0
     @cherrypy.expose
+    @cherrypy.tools.json_in()
     @cherrypy.tools.json_out()
     @exception_to_httperror(NilmDBError)
     @cherrypy.tools.CORS_allow(methods = ["POST"])
@@ -307,52 +332,68 @@ class Stream(NilmApp):
         removed.
         """
         if start is not None:
-            start = float(start)
+            start = string_to_timestamp(start)
         if end is not None:
-            end = float(end)
+            end = string_to_timestamp(end)
         if start is not None and end is not None:
             if start >= end:
                 raise cherrypy.HTTPError("400 Bad Request",
                                          "start must precede end")
-        return self.db.stream_remove(path, start, end)
+        total_removed = 0
+        while True:
+            (removed, restart) = self.db.stream_remove(path, start, end)
+            total_removed += removed
+            if restart is None:
+                break
+            start = restart
+        return total_removed
 
     # /stream/intervals?path=/newton/prep
     # /stream/intervals?path=/newton/prep&start=1234567890.0&end=1234567899.0
+    # /stream/intervals?path=/newton/prep&diffpath=/newton/prep2
     @cherrypy.expose
     @chunked_response
     @response_type("application/x-json-stream")
-    def intervals(self, path, start = None, end = None):
+    def intervals(self, path, start = None, end = None, diffpath = None):
         """
         Get intervals from backend database.  Streams the resulting
         intervals as JSON strings separated by CR LF pairs.  This may
         make multiple requests to the nilmdb backend to avoid causing
         it to block for too long.
 
+        Returns intervals between 'start' and 'end' belonging to
+        'path'.  If 'diff' is provided, the set-difference between
+        intervals in 'path' and intervals in 'diffpath' are
+        returned instead.
+
         Note that the response type is the non-standard
         'application/x-json-stream' for lack of a better option.
         """
         if start is not None:
-            start = float(start)
+            start = string_to_timestamp(start)
         if end is not None:
-            end = float(end)
+            end = string_to_timestamp(end)
 
         if start is not None and end is not None:
             if start >= end:
                 raise cherrypy.HTTPError("400 Bad Request",
                                          "start must precede end")
 
-        streams = self.db.stream_list(path = path)
+        if len(self.db.stream_list(path = path)) != 1:
-        if len(streams) != 1:
+            raise cherrypy.HTTPError("404", "No such stream: " + path)
-            raise cherrypy.HTTPError("404 Not Found", "No such stream")
+
+        if diffpath and len(self.db.stream_list(path = diffpath)) != 1:
+            raise cherrypy.HTTPError("404", "No such stream: " + diffpath)
 
         @workaround_cp_bug_1200
         def content(start, end):
             # Note: disable chunked responses to see tracebacks from here.
             while True:
-                (ints, restart) = self.db.stream_intervals(path, start, end)
+                (ints, restart) = self.db.stream_intervals(path, start, end,
+                                                           diffpath)
                 response = ''.join([ json.dumps(i) + "\r\n" for i in ints ])
                 yield response
-                if restart == 0:
+                if restart is None:
                     break
                 start = restart
         return content(start, end)
@@ -371,9 +412,9 @@ class Stream(NilmApp):
         Add count=True to return a count rather than actual data.
         """
         if start is not None:
-            start = float(start)
+            start = string_to_timestamp(start)
         if end is not None:
-            end = float(end)
+            end = string_to_timestamp(end)
 
         # Check parameters
         if start is not None and end is not None:
@@ -385,10 +426,6 @@ class Stream(NilmApp):
         streams = self.db.stream_list(path = path)
         if len(streams) != 1:
             raise cherrypy.HTTPError("404 Not Found", "No such stream")
-        layout = streams[0][1]
-
-        # Get formatter
-        formatter = nilmdb.server.layout.Formatter(layout)
 
         @workaround_cp_bug_1200
         def content(start, end, count):
@@ -400,11 +437,9 @@ class Stream(NilmApp):
 
             while True:
                 (data, restart) = self.db.stream_extract(path, start, end)
+                yield data
 
-                # Format the data and yield it
+                if restart is None:
-                yield formatter.format(data)
-
-                if restart == 0:
                     return
                 start = restart
         return content(start, end, count)
@@ -463,6 +498,12 @@ class Server(object):
         app_config.update({ 'tools.CORS_allow.on': True,
                             'tools.CORS_allow.methods': ['GET', 'HEAD'] })
 
+        # Configure the 'json_in' tool to also allow other content-types
+        # (like x-www-form-urlencoded), and to treat JSON as a dict that
+        # fills requests.param.
+        app_config.update({ 'tools.json_in.force': False,
+                            'tools.json_in.processor': json_to_request_params })
+
         # Send tracebacks in error responses.  They're hidden by the
         # error_page function for client errors (code 400-499).
         app_config.update({ 'request.show_tracebacks' : True })

nilmdb/utils/__init__.py

@@ -8,3 +8,7 @@ from nilmdb.utils.diskusage import du, human_size
 from nilmdb.utils.mustclose import must_close
 from nilmdb.utils import atomic
 import nilmdb.utils.threadsafety
+import nilmdb.utils.fallocate
+import nilmdb.utils.time
+import nilmdb.utils.iterator
+import nilmdb.utils.interval

nilmdb/utils/fallocate.py

@@ -0,0 +1,49 @@
+# Implementation of hole punching via fallocate, if the OS
+# and filesystem support it.
+
+try:
+    import os
+    import ctypes
+    import ctypes.util
+
+    def make_fallocate():
+        libc_name = ctypes.util.find_library('c')
+        libc = ctypes.CDLL(libc_name, use_errno=True)
+
+        _fallocate = libc.fallocate
+        _fallocate.restype = ctypes.c_int
+        _fallocate.argtypes = [ ctypes.c_int, ctypes.c_int,
+                                ctypes.c_int64, ctypes.c_int64 ]
+
+        del libc
+        del libc_name
+
+        def fallocate(fd, mode, offset, len_):
+            res = _fallocate(fd, mode, offset, len_)
+            if res != 0: # pragma: no cover
+                errno = ctypes.get_errno()
+                raise IOError(errno, os.strerror(errno))
+        return fallocate
+
+    fallocate = make_fallocate()
+    del make_fallocate
+except Exception: # pragma: no cover
+    fallocate = None
+
+FALLOC_FL_KEEP_SIZE = 0x01
+FALLOC_FL_PUNCH_HOLE = 0x02
+
+def punch_hole(filename, offset, length, ignore_errors = True):
+    """Punch a hole in the file.  This isn't well supported, so errors
+    are ignored by default."""
+    try:
+        if fallocate is None: # pragma: no cover
+            raise IOError("fallocate not available")
+        with open(filename, "r+") as f:
+            fallocate(f.fileno(),
+                      FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE,
+                      offset, length)
+    except IOError: # pragma: no cover
+        if ignore_errors:
+            return
+        raise

nilmdb/utils/interval.py

@@ -0,0 +1,106 @@
+"""Interval.  Like nilmdb.server.interval, but re-implemented here
+in plain Python so clients have easier access to it.
+
+Intervals are half-open, ie. they include data points with timestamps
+[start, end)
+"""
+
+import nilmdb.utils.time
+import nilmdb.utils.iterator
+
+class IntervalError(Exception):
+    """Error due to interval overlap, etc"""
+    pass
+
+# Interval
+class Interval:
+    """Represents an interval of time."""
+
+    def __init__(self, start, end):
+        """
+        'start' and 'end' are arbitrary numbers that represent time
+        """
+        if start >= end:
+            # Explicitly disallow zero-width intervals (since they're half-open)
+            raise IntervalError("start %s must precede end %s" % (start, end))
+        self.start = start
+        self.end = end
+
+    def __repr__(self):
+        s = repr(self.start) + ", " + repr(self.end)
+        return self.__class__.__name__ + "(" + s + ")"
+
+    def __str__(self):
+        return ("[" + nilmdb.utils.time.timestamp_to_string(self.start) +
+                " -> " + nilmdb.utils.time.timestamp_to_string(self.end) + ")")
+
+    def __cmp__(self, other):
+        """Compare two intervals.  If non-equal, order by start then end"""
+        return cmp(self.start, other.start) or cmp(self.end, other.end)
+
+    def intersects(self, other):
+        """Return True if two Interval objects intersect"""
+        if not isinstance(other, Interval):
+            raise TypeError("need an Interval")
+        if self.end <= other.start or self.start >= other.end:
+            return False
+        return True
+
+    def subset(self, start, end):
+        """Return a new Interval that is a subset of this one"""
+        # A subclass that tracks additional data might override this.
+        if start < self.start or end > self.end:
+            raise IntervalError("not a subset")
+        return Interval(start, end)
+
+def set_difference(a, b):
+    """
+    Compute the difference (a \\ b) between the intervals in 'a' and
+    the intervals in 'b'; i.e., the ranges that are present in 'self'
+    but not 'other'.
+
+    'a' and 'b' must both be iterables.
+
+    Returns a generator that yields each interval in turn.
+    Output intervals are built as subsets of the intervals in the
+    first argument (a).
+    """
+    # Iterate through all starts and ends in sorted order.  Add a
+    # tag to the iterator so that we can figure out which one they
+    # were, after sorting.
+    def decorate(it, key_start, key_end):
+        for i in it:
+            yield i.start, key_start, i
+            yield i.end, key_end, i
+    a_iter = decorate(iter(a), 0, 2)
+    b_iter = decorate(iter(b), 1, 3)
+
+    # Now iterate over the timestamps of each start and end.
+    # At each point, evaluate which type of end it is, to determine
+    # how to build up the output intervals.
+    a_interval = None
+    b_interval = None
+    out_start = None
+    for (ts, k, i) in nilmdb.utils.iterator.imerge(a_iter, b_iter):
+        if k == 0:
+            # start a interval
+            a_interval = i
+            if b_interval is None:
+                out_start = ts
+        elif k == 1:
+            # start b interval
+            b_interval = i
+            if out_start is not None and out_start != ts:
+                yield a_interval.subset(out_start, ts)
+            out_start = None
+        elif k == 2:
+            # end a interval
+            if out_start is not None and out_start != ts:
+                yield a_interval.subset(out_start, ts)
+            out_start = None
+            a_interval = None
+        elif k == 3:
+            # end b interval
+            b_interval = None
+            if a_interval:
+                out_start = ts

nilmdb/utils/iterator.py

@@ -0,0 +1,36 @@
+# Misc iterator tools
+
+# Iterator merging, based on http://code.activestate.com/recipes/491285/
+import heapq
+def imerge(*iterables):
+    '''Merge multiple sorted inputs into a single sorted output.
+
+    Equivalent to:  sorted(itertools.chain(*iterables))
+
+    >>> list(imerge([1,3,5,7], [0,2,4,8], [5,10,15,20], [], [25]))
+    [0, 1, 2, 3, 4, 5, 5, 7, 8, 10, 15, 20, 25]
+
+    '''
+    heappop, siftup, _Stop = heapq.heappop, heapq._siftup, StopIteration
+
+    h = []
+    h_append = h.append
+    for it in map(iter, iterables):
+        try:
+            next = it.next
+            h_append([next(), next])
+        except _Stop:
+            pass
+    heapq.heapify(h)
+
+    while 1:
+        try:
+            while 1:
+                v, next = s = h[0]      # raises IndexError when h is empty
+                yield v
+                s[0] = next()           # raises StopIteration when exhausted
+                siftup(h, 0)            # restore heap condition
+        except _Stop:
+            heappop(h)                  # remove empty iterator
+        except IndexError:
+            return

nilmdb/utils/time.py

@@ -1,12 +1,70 @@
+from __future__ import absolute_import
+
 from nilmdb.utils import datetime_tz
 import re
+import time
+
+# Range
+min_timestamp = (-2**63)
+max_timestamp = (2**62 - 1)
+
+# Smallest representable step
+epsilon = 1
+
+def string_to_timestamp(str):
+    """Convert a string that represents an integer number of microseconds
+    since epoch."""
+    try:
+        # Parse a string like "1234567890123456" and return an integer
+        return int(str)
+    except ValueError:
+        # Try parsing as a float, in case it's "1234567890123456.0"
+        return int(round(float(str)))
+
+def timestamp_to_string(timestamp):
+    """Convert a timestamp (integer microseconds since epoch) to a string"""
+    if isinstance(timestamp, float):
+        return str(int(round(timestamp)))
+    else:
+        return str(timestamp)
+
+def timestamp_to_human(timestamp):
+    """Convert a timestamp (integer microseconds since epoch) to a
+    human-readable string, using the local timezone for display
+    (e.g. from the TZ env var)."""
+    dt = datetime_tz.datetime_tz.fromtimestamp(timestamp_to_unix(timestamp))
+    return dt.strftime("%a, %d %b %Y %H:%M:%S.%f %z")
+
+def unix_to_timestamp(unix):
+    """Convert a Unix timestamp (floating point seconds since epoch)
+    into a NILM timestamp (integer microseconds since epoch)"""
+    return int(round(unix * 1e6))
+seconds_to_timestamp = unix_to_timestamp
+
+def timestamp_to_unix(timestamp):
+    """Convert a NILM timestamp (integer microseconds since epoch)
+    into a Unix timestamp (floating point seconds since epoch)"""
+    return timestamp / 1e6
+timestamp_to_seconds = timestamp_to_unix
+
+def rate_to_period(hz, cycles = 1):
+    """Convert a rate (in Hz) to a period (in timestamp units).
+    Returns an integer."""
+    period = unix_to_timestamp(cycles) / float(hz)
+    return int(round(period))
 
 def parse_time(toparse):
     """
-    Parse a free-form time string and return a datetime_tz object.
+    Parse a free-form time string and return a nilmdb timestamp
-    If the string doesn't contain a timestamp, the current local
+    (integer seconds since epoch).  If the string doesn't contain a
-    timezone is assumed (e.g. from the TZ env var).
+    timestamp, the current local timezone is assumed (e.g. from the TZ
+    env var).
     """
+    if toparse == "min":
+        return min_timestamp
+    if toparse == "max":
+        return max_timestamp
+
     # If string isn't "now" and doesn't contain at least 4 digits,
     # consider it invalid.  smartparse might otherwise accept
     # empty strings and strings with just separators.
@@ -15,7 +73,28 @@ def parse_time(toparse):
 
     # Try to just parse the time as given
     try:
-        return datetime_tz.datetime_tz.smartparse(toparse)
+        return unix_to_timestamp(datetime_tz.datetime_tz.
+                                 smartparse(toparse).totimestamp())
+    except (ValueError, OverflowError):
+        pass
+
+    # If it starts with @, treat it as a NILM timestamp
+    # (integer microseconds since epoch)
+    try:
+        if toparse[0] == '@':
+            return int(toparse[1:])
+    except (ValueError, KeyError):
+        pass
+
+    # If it's parseable as a float, treat it as a Unix or NILM
+    # timestamp based on its range.
+    try:
+        val = float(toparse)
+        # range is from about year 2001 - 2128
+        if val > 1e9 and val < 5e9:
+            return unix_to_timestamp(val)
+        if val > 1e15 and val < 5e15:
+            return val
     except ValueError:
         pass
 
@@ -37,7 +116,8 @@ def parse_time(toparse):
                     r")", toparse)
     if res is not None:
         try:
-            return datetime_tz.datetime_tz.smartparse(res.group(2))
+            return unix_to_timestamp(datetime_tz.datetime_tz.
+                                     smartparse(res.group(2)).totimestamp())
         except ValueError:
             pass
 
@@ -45,10 +125,6 @@ def parse_time(toparse):
     # just give up for now.
     raise ValueError("unable to parse timestamp")
 
-def format_time(timestamp):
+def now():
-    """
+    """Return current timestamp"""
-    Convert a Unix timestamp to a string for printing, using the
+    return unix_to_timestamp(time.time())
-    local timezone for display (e.g. from the TZ env var).
-    """
-    dt = datetime_tz.datetime_tz.fromtimestamp(timestamp)
-    return dt.strftime("%a, %d %b %Y %H:%M:%S.%f %z")

nilmdb/utils/timestamper.py

@@ -1,7 +1,7 @@
 """File-like objects that add timestamps to the input lines"""
 
 from nilmdb.utils.printf import *
-from nilmdb.utils import datetime_tz
+import nilmdb.utils.time
 
 class Timestamper(object):
     """A file-like object that adds timestamps to lines of an input file."""
@@ -61,44 +61,33 @@ class TimestamperRate(Timestamper):
 
         end: If specified, raise StopIteration before outputting a value
              greater than this."""
+        timestamp_to_string = nilmdb.utils.time.timestamp_to_string
+        rate_to_period = nilmdb.utils.time.rate_to_period
         def iterator(start, rate, end):
             n = 0
             rate = float(rate)
             while True:
-                now = start + n / rate
+                now = start + rate_to_period(rate, n)
                 if end and now >= end:
                     raise StopIteration
-                yield sprintf("%.6f ", start + n / rate)
+                yield timestamp_to_string(now) + " "
                 n += 1
-        # Handle case where we're passed a datetime or datetime_tz object
-        if "totimestamp" in dir(start):
-            start = start.totimestamp()
         Timestamper.__init__(self, infile, iterator(start, rate, end))
         self.start = start
         self.rate = rate
     def __str__(self):
-        start = datetime_tz.datetime_tz.fromtimestamp(self.start)
-        start = start.strftime("%a, %d %b %Y %H:%M:%S %Z")
         return sprintf("TimestamperRate(..., start=\"%s\", rate=%g)",
-                       str(start), self.rate)
+                       nilmdb.utils.time.timestamp_to_human(self.start),
+                       self.rate)
 
 class TimestamperNow(Timestamper):
     """Timestamper that uses current time"""
     def __init__(self, infile):
+        timestamp_to_string = nilmdb.utils.time.timestamp_to_string
+        get_now = nilmdb.utils.time.now
         def iterator():
             while True:
-                now = datetime_tz.datetime_tz.utcnow().totimestamp()
+                yield timestamp_to_string(get_now()) + " "
-                yield sprintf("%.6f ", now)
         Timestamper.__init__(self, infile, iterator())
     def __str__(self):
         return "TimestamperNow(...)"
-
-class TimestamperNull(Timestamper):
-    """Timestamper that adds nothing to each line"""
-    def __init__(self, infile):
-        def iterator():
-            while True:
-                yield ""
-        Timestamper.__init__(self, infile, iterator())
-    def __str__(self):
-        return "TimestamperNull(...)"

setup.py

@@ -43,7 +43,6 @@ except: pass
 
 # Use Cython if it's new enough, otherwise use preexisting C files.
 cython_modules = [ 'nilmdb.server.interval',
-                   'nilmdb.server.layout',
                    'nilmdb.server.rbtree' ]
 try:
     import Cython
@@ -56,7 +55,7 @@ try:
 except ImportError:
     use_cython = False
 
-ext_modules = []
+ext_modules = [ Extension('nilmdb.server.rocket', ['nilmdb/server/rocket.c' ]) ]
 for modulename in cython_modules:
     filename = modulename.replace('.','/')
     if use_cython:
@@ -91,6 +90,9 @@ include tests/test.order
 
 # Docs
 recursive-include docs Makefile *.md
+
+# Extras
+recursive-include extras *
 """)
 
 # Run setup

tests/data/extract-1

@@ -1,124 +1,124 @@
 # path: /newton/prep
-# layout: PrepData
+# layout: float32_8
 # start: Fri, 23 Mar 2012 10:00:30.000000 +0000
 # end: Fri, 23 Mar 2012 10:00:31.000000 +0000
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-1332496830.016667 263073.000000 223304.000000 4961.640137 2197.120117 7687.310059 4861.859863 2732.780029 3008.540039
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-1332496830.025000 257614.000000 223323.000000 5003.660156 3525.139893 7165.310059 4685.620117 1715.380005 3440.479980
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-1332496830.075000 261061.000000 221263.000000 6951.979980 1500.239990 9386.099609 3791.679932 2677.010010 3980.629883
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-1332496830.083333 266503.000000 223198.000000 5189.609863 2594.560059 8571.530273 3175.000000 919.840027 3792.010010
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-1332496830.091667 260692.000000 225184.000000 3782.479980 4642.879883 7662.959961 3917.790039 -251.097000 2907.060059
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+1332496830116667 2.608890e+05 2.250100e+05 4.681130e+03 2.971870e+03 7.900040e+03 4.874080e+03 2.322430e+03 3.649120e+03
-1332496830.125000 257944.000000 224923.000000 3291.139893 4357.089844 7131.589844 4385.560059 1077.050049 3664.040039
+1332496830125000 2.579440e+05 2.249230e+05 3.291140e+03 4.357090e+03 7.131590e+03 4.385560e+03 1.077050e+03 3.664040e+03
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tests/data/extract-2

@@ -1,119 +1,119 @@
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tests/data/extract-3

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tests/data/extract-4

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tests/data/extract-5

@@ -1,124 +1,124 @@
 # path: /newton/prep
-# layout: PrepData
+# layout: float32_8
 # start: Fri, 23 Mar 2012 10:00:30.000000 +0000
 # end: Fri, 23 Mar 2012 10:00:31.000000 +0000
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tests/data/extract-6

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tests/data/extract-7

@@ -1,124 +1,124 @@
 # path: /newton/prep
-# layout: PrepData
+# layout: float32_8
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tests/data/prep-20120323T1000

@@ -1,3 +1,4 @@
+# comments are cool?
 2.66568e+05  2.24029e+05  5.16140e+03  2.52517e+03  8.35084e+03  3.72470e+03  1.35534e+03  2.03900e+03  
 2.57914e+05  2.27183e+05  4.30368e+03  4.13080e+03  7.25535e+03  4.89047e+03  1.63859e+03  1.93496e+03  
 2.51717e+05  2.26047e+05  5.99445e+03  3.49363e+03  8.07250e+03  5.08267e+03  2.26917e+03  2.86231e+03  

tests/data/prep-20120323T1004-badtimes

@@ -1,11 +1,11 @@
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+1332497040000000 2.56439e+05  2.24775e+05  2.92897e+03  4.66646e+03  7.58491e+03  3.57351e+03  -4.34171e+02  2.98819e+03  
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tests/test.order

@@ -7,7 +7,6 @@ test_serializer.py
 test_iteratorizer.py
 
 test_timestamper.py
-test_layout.py
 test_rbtree.py
 test_interval.py
 

tests/test_bulkdata.py

@@ -35,8 +35,6 @@ class TestBulkData(object):
             data.create("/foo", "uint16_8")
         with assert_raises(ValueError):
             data.create("foo/bar", "uint16_8")
-        with assert_raises(ValueError):
-            data.create("/foo/bar", "uint8_8")
         data.create("/foo/bar", "uint16_8")
         data.create(u"/foo/baz/quux", "float64_16")
         with assert_raises(ValueError):
@@ -51,24 +49,40 @@ class TestBulkData(object):
             nodes.append(data.getnode("/foo/baz/quux"))
         del nodes
 
+        def get_node_slice(key):
+            if isinstance(key, slice):
+                return [ node.get_data(x, x+1) for x in
+                         xrange(*key.indices(node.nrows)) ]
+            return node.get_data(key, key+1)
+
         # Test node
         node = data.getnode("/foo/bar")
         with assert_raises(IndexError):
-            x = node[0]
+            x = get_node_slice(0)
+        with assert_raises(IndexError):
+            x = node[0] # timestamp
         raw = []
         for i in range(1000):
-            raw.append([10000+i, 1, 2, 3, 4, 5, 6, 7, 8 ])
+            raw.append("%d 1 2 3 4 5 6 7 8\n" % (10000 + i))
-        node.append(raw[0:1])
+        node.append_string("".join(raw[0:1]), 0, 50000)
-        node.append(raw[1:100])
+        node.append_string("".join(raw[1:100]), 0, 50000)
-        node.append(raw[100:])
+        node.append_string("".join(raw[100:]), 0, 50000)
 
         misc_slices = [ 0, 100, slice(None), slice(0), slice(10),
                         slice(5,10), slice(3,None), slice(3,-3),
                         slice(20,10), slice(200,100,-1), slice(None,0,-1),
                         slice(100,500,5) ]
+
         # Extract slices
         for s in misc_slices:
-            eq_(node[s], raw[s])
+            eq_(get_node_slice(s), raw[s])
+
+        # Extract misc slices while appending, to make sure the
+        # data isn't being added in the middle of the file
+        for s in [2, slice(1,5), 2, slice(1,5)]:
+            node.append_string("0 0 0 0 0 0 0 0 0\n", 0, 50000)
+            raw.append("0 0 0 0 0 0 0 0 0\n")
+            eq_(get_node_slice(s), raw[s])
 
         # Get some coverage of remove; remove is more fully tested
         # in cmdline
@@ -86,7 +100,7 @@ class TestBulkData(object):
 
         # Extract slices
         for s in misc_slices:
-            eq_(node[s], raw[s])
+            eq_(get_node_slice(s), raw[s])
 
         # destroy
         with assert_raises(ValueError):

tests/test_client.py

@@ -1,6 +1,8 @@
 # -*- coding: utf-8 -*-
 
-import nilmdb
+import nilmdb.server
+import nilmdb.client
+
 from nilmdb.utils.printf import *
 from nilmdb.utils import timestamper
 from nilmdb.client import ClientError, ServerError
@@ -33,11 +35,11 @@ def setup_module():
     recursive_unlink(testdb)
 
     # Start web app on a custom port
-    test_db = nilmdb.utils.serializer_proxy(nilmdb.NilmDB)(testdb, sync = False)
+    test_db = nilmdb.utils.serializer_proxy(nilmdb.server.NilmDB)(testdb)
-    test_server = nilmdb.Server(test_db, host = "127.0.0.1",
+    test_server = nilmdb.server.Server(test_db, host = "127.0.0.1",
-                                port = 32180, stoppable = False,
+                                       port = 32180, stoppable = False,
-                                fast_shutdown = True,
+                                       fast_shutdown = True,
-                                force_traceback = False)
+                                       force_traceback = True)
     test_server.start(blocking = False)
 
 def teardown_module():
@@ -50,24 +52,24 @@ class TestClient(object):
 
     def test_client_01_basic(self):
         # Test a fake host
-        client = nilmdb.Client(url = "http://localhost:1/")
+        client = nilmdb.client.Client(url = "http://localhost:1/")
         with assert_raises(nilmdb.client.ServerError):
             client.version()
         client.close()
 
         # Then a fake URL on a real host
-        client = nilmdb.Client(url = "http://localhost:32180/fake/")
+        client = nilmdb.client.Client(url = "http://localhost:32180/fake/")
         with assert_raises(nilmdb.client.ClientError):
             client.version()
         client.close()
 
         # Now a real URL with no http:// prefix
-        client = nilmdb.Client(url = "localhost:32180")
+        client = nilmdb.client.Client(url = "localhost:32180")
         version = client.version()
         client.close()
 
         # Now use the real URL
-        client = nilmdb.Client(url = testurl)
+        client = nilmdb.client.Client(url = testurl)
         version = client.version()
         eq_(distutils.version.LooseVersion(version),
             distutils.version.LooseVersion(test_server.version))
@@ -79,16 +81,16 @@ class TestClient(object):
 
     def test_client_02_createlist(self):
         # Basic stream tests, like those in test_nilmdb:test_stream
-        client = nilmdb.Client(url = testurl)
+        client = nilmdb.client.Client(url = testurl)
 
         # Database starts empty
         eq_(client.stream_list(), [])
 
         # Bad path
         with assert_raises(ClientError):
-            client.stream_create("foo/bar/baz", "PrepData")
+            client.stream_create("foo/bar/baz", "float32_8")
         with assert_raises(ClientError):
-            client.stream_create("/foo", "PrepData")
+            client.stream_create("/foo", "float32_8")
         # Bad layout type
         with assert_raises(ClientError):
             client.stream_create("/newton/prep", "NoSuchLayout")
@@ -100,23 +102,23 @@ class TestClient(object):
         for x in range(10):
             with assert_raises(ClientError):
                 client.http.post("/stream/list")
-        client = nilmdb.Client(url = testurl)
+        client = nilmdb.client.Client(url = testurl)
 
         # Create three streams
-        client.stream_create("/newton/prep", "PrepData")
+        client.stream_create("/newton/prep", "float32_8")
-        client.stream_create("/newton/raw", "RawData")
+        client.stream_create("/newton/raw", "uint16_6")
-        client.stream_create("/newton/zzz/rawnotch", "RawNotchedData")
+        client.stream_create("/newton/zzz/rawnotch", "uint16_9")
 
         # Verify we got 3 streams
-        eq_(client.stream_list(), [ ["/newton/prep", "PrepData"],
+        eq_(client.stream_list(), [ ["/newton/prep", "float32_8"],
-                                    ["/newton/raw", "RawData"],
+                                    ["/newton/raw", "uint16_6"],
-                                    ["/newton/zzz/rawnotch", "RawNotchedData"]
+                                    ["/newton/zzz/rawnotch", "uint16_9"]
                                     ])
         # Match just one type or one path
-        eq_(client.stream_list(layout="RawData"),
+        eq_(client.stream_list(layout="uint16_6"),
-            [ ["/newton/raw", "RawData"] ])
+            [ ["/newton/raw", "uint16_6"] ])
         eq_(client.stream_list(path="/newton/raw"),
-            [ ["/newton/raw", "RawData"] ])
+            [ ["/newton/raw", "uint16_6"] ])
 
         # Try messing with resource limits to trigger errors and get
         # more coverage.  Here, make it so we can only create files 1
@@ -125,13 +127,13 @@ class TestClient(object):
         limit = resource.getrlimit(resource.RLIMIT_FSIZE)
         resource.setrlimit(resource.RLIMIT_FSIZE, (1, limit[1]))
         with assert_raises(ServerError) as e:
-            client.stream_create("/newton/hello", "RawData")
+            client.stream_create("/newton/hello", "uint16_6")
         resource.setrlimit(resource.RLIMIT_FSIZE, limit)
 
         client.close()
 
     def test_client_03_metadata(self):
-        client = nilmdb.Client(url = testurl)
+        client = nilmdb.client.Client(url = testurl)
 
         # Set / get metadata
         eq_(client.stream_get_metadata("/newton/prep"), {})
@@ -162,10 +164,20 @@ class TestClient(object):
             client.stream_set_metadata("/newton/prep", [1,2,3])
         with assert_raises(ClientError):
             client.stream_update_metadata("/newton/prep", [1,2,3])
+
+        # test wrong types (dict of non-strings)
+        # numbers are OK; they'll get converted to strings
+        client.stream_set_metadata("/newton/prep", { "hello": 1234 })
+        # anything else is not
+        with assert_raises(ClientError):
+            client.stream_set_metadata("/newton/prep", { "world": { 1: 2 } })
+        with assert_raises(ClientError):
+            client.stream_set_metadata("/newton/prep", { "world": [ 1, 2 ] })
+
         client.close()
 
     def test_client_04_insert(self):
-        client = nilmdb.Client(url = testurl)
+        client = nilmdb.client.Client(url = testurl)
 
         # Limit _max_data to 1 MB, since our test file is 1.5 MB
         old_max_data = nilmdb.client.client.StreamInserter._max_data
@@ -174,8 +186,7 @@ class TestClient(object):
         datetime_tz.localtz_set("America/New_York")
 
         testfile = "tests/data/prep-20120323T1000"
-        start = datetime_tz.datetime_tz.smartparse("20120323T1000")
+        start = nilmdb.utils.time.parse_time("20120323T1000")
-        start = start.totimestamp()
         rate = 120
 
         # First try a nonexistent path
@@ -190,7 +201,8 @@ class TestClient(object):
         with assert_raises(ClientError) as e:
             result = client.stream_insert("/newton/prep", data)
         in_("400 Bad Request", str(e.exception))
-        in_("timestamp is not monotonically increasing", str(e.exception))
+        in2_("timestamp is not monotonically increasing",
+             "start must precede end", str(e.exception))
 
         # Now try empty data (no server request made)
         empty = cStringIO.StringIO("")
@@ -230,32 +242,32 @@ class TestClient(object):
         data = timestamper.TimestamperRate(testfile, start, 120)
         with assert_raises(ClientError) as e:
             result = client.stream_insert("/newton/prep", data,
-                                          start + 5, start + 120)
+                                          start + 5000000, start + 120000000)
         in_("400 Bad Request", str(e.exception))
-        in_("Data timestamp 1332511200.0 < start time 1332511205.0",
+        in_("Data timestamp 1332511200000000 < start time 1332511205000000",
             str(e.exception))
 
         # Specify start/end (ends too early)
         data = timestamper.TimestamperRate(testfile, start, 120)
         with assert_raises(ClientError) as e:
             result = client.stream_insert("/newton/prep", data,
-                                          start, start + 1)
+                                          start, start + 1000000)
         in_("400 Bad Request", str(e.exception))
         # Client chunks the input, so the exact timestamp here might change
         # if the chunk positions change.
-        assert(re.search("Data timestamp 13325[0-9]+\.[0-9]+ "
+        assert(re.search("Data timestamp 13325[0-9]+ "
-                         ">= end time 1332511201.0", str(e.exception))
+                         ">= end time 1332511201000000", str(e.exception))
                is not None)
 
         # Now do the real load
         data = timestamper.TimestamperRate(testfile, start, 120)
         result = client.stream_insert("/newton/prep", data,
-                                      start, start + 119.999777)
+                                      start, start + 119999777)
 
         # Verify the intervals.  Should be just one, even if the data
         # was inserted in chunks, due to nilmdb interval concatenation.
         intervals = list(client.stream_intervals("/newton/prep"))
-        eq_(intervals, [[start, start + 119.999777]])
+        eq_(intervals, [[start, start + 119999777]])
 
         # Try some overlapping data -- just insert it again
         data = timestamper.TimestamperRate(testfile, start, 120)
@@ -269,13 +281,14 @@ class TestClient(object):
 
     def test_client_05_extractremove(self):
         # Misc tests for extract and remove.  Most of them are in test_cmdline.
-        client = nilmdb.Client(url = testurl)
+        client = nilmdb.client.Client(url = testurl)
 
-        for x in client.stream_extract("/newton/prep", 999123, 999124):
+        for x in client.stream_extract("/newton/prep",
+                                       999123000000, 999124000000):
             raise AssertionError("shouldn't be any data for this request")
 
         with assert_raises(ClientError) as e:
-            client.stream_remove("/newton/prep", 123, 120)
+            client.stream_remove("/newton/prep", 123000000, 120000000)
 
         # Test count
         eq_(client.stream_count("/newton/prep"), 14400)
@@ -285,16 +298,14 @@ class TestClient(object):
     def test_client_06_generators(self):
         # A lot of the client functionality is already tested by test_cmdline,
         # but this gets a bit more coverage that cmdline misses.
-        client = nilmdb.Client(url = testurl)
+        client = nilmdb.client.Client(url = testurl)
 
         # Trigger a client error in generator
-        start = datetime_tz.datetime_tz.smartparse("20120323T2000")
+        start = nilmdb.utils.time.parse_time("20120323T2000")
-        end = datetime_tz.datetime_tz.smartparse("20120323T1000")
+        end = nilmdb.utils.time.parse_time("20120323T1000")
         for function in [ client.stream_intervals, client.stream_extract ]:
             with assert_raises(ClientError) as e:
-                function("/newton/prep",
+                function("/newton/prep", start, end).next()
-                         start.totimestamp(),
-                         end.totimestamp()).next()
             in_("400 Bad Request", str(e.exception))
             in_("start must precede end", str(e.exception))
 
@@ -321,7 +332,7 @@ class TestClient(object):
         # Pokes around in client.http internals a bit to look at the
         # response headers.
 
-        client = nilmdb.Client(url = testurl)
+        client = nilmdb.client.Client(url = testurl)
         http = client.http
 
         # Use a warning rather than returning a test failure for the
@@ -357,43 +368,46 @@ class TestClient(object):
         client.close()
 
     def test_client_08_unicode(self):
-        # Basic Unicode tests
+        # Try both with and without posting JSON
-        client = nilmdb.Client(url = testurl)
+        for post_json in (False, True):
+            # Basic Unicode tests
+            client = nilmdb.client.Client(url = testurl, post_json = post_json)
 
-        # Delete streams that exist
+            # Delete streams that exist
-        for stream in client.stream_list():
+            for stream in client.stream_list():
-            client.stream_destroy(stream[0])
+                client.stream_remove(stream[0])
+                client.stream_destroy(stream[0])
 
-        # Database is empty
+            # Database is empty
-        eq_(client.stream_list(), [])
+            eq_(client.stream_list(), [])
 
-        # Create Unicode stream, match it
+            # Create Unicode stream, match it
-        raw = [ u"/düsseldorf/raw", u"uint16_6" ]
+            raw = [ u"/düsseldorf/raw", u"uint16_6" ]
-        prep = [ u"/düsseldorf/prep", u"uint16_6" ]
+            prep = [ u"/düsseldorf/prep", u"uint16_6" ]
-        client.stream_create(*raw)
+            client.stream_create(*raw)
-        eq_(client.stream_list(), [raw])
+            eq_(client.stream_list(), [raw])
-        eq_(client.stream_list(layout=raw[1]), [raw])
+            eq_(client.stream_list(layout=raw[1]), [raw])
-        eq_(client.stream_list(path=raw[0]), [raw])
+            eq_(client.stream_list(path=raw[0]), [raw])
-        client.stream_create(*prep)
+            client.stream_create(*prep)
-        eq_(client.stream_list(), [prep, raw])
+            eq_(client.stream_list(), [prep, raw])
 
-        # Set / get metadata with Unicode keys and values
+            # Set / get metadata with Unicode keys and values
-        eq_(client.stream_get_metadata(raw[0]), {})
+            eq_(client.stream_get_metadata(raw[0]), {})
-        eq_(client.stream_get_metadata(prep[0]), {})
+            eq_(client.stream_get_metadata(prep[0]), {})
-        meta1 = { u"alpha": u"α",
+            meta1 = { u"alpha": u"α",
-                  u"β": u"beta" }
+                      u"β": u"beta" }
-        meta2 = { u"alpha": u"α" }
+            meta2 = { u"alpha": u"α" }
-        meta3 = { u"β": u"beta" }
+            meta3 = { u"β": u"beta" }
-        client.stream_set_metadata(prep[0], meta1)
+            client.stream_set_metadata(prep[0], meta1)
-        client.stream_update_metadata(prep[0], {})
+            client.stream_update_metadata(prep[0], {})
-        client.stream_update_metadata(raw[0], meta2)
+            client.stream_update_metadata(raw[0], meta2)
-        client.stream_update_metadata(raw[0], meta3)
+            client.stream_update_metadata(raw[0], meta3)
-        eq_(client.stream_get_metadata(prep[0]), meta1)
+            eq_(client.stream_get_metadata(prep[0]), meta1)
-        eq_(client.stream_get_metadata(raw[0]), meta1)
+            eq_(client.stream_get_metadata(raw[0]), meta1)
-        eq_(client.stream_get_metadata(raw[0], [ "alpha" ]), meta2)
+            eq_(client.stream_get_metadata(raw[0], [ "alpha" ]), meta2)
-        eq_(client.stream_get_metadata(raw[0], [ "alpha", "β" ]), meta1)
+            eq_(client.stream_get_metadata(raw[0], [ "alpha", "β" ]), meta1)
 
-        client.close()
+            client.close()
 
     def test_client_09_closing(self):
         # Make sure we actually close sockets correctly.  New
@@ -407,74 +421,96 @@ class TestClient(object):
                                          "probably not closing properly.")
                 if test == 1:
                     # explicit close
-                    client = nilmdb.Client(url = testurl)
+                    client = nilmdb.client.Client(url = testurl)
                     with assert_raises(ClientError) as e:
                         client.stream_remove("/newton/prep", 123, 120)
                     client.close() # remove this to see the failure
                 elif test == 2:
                     # use the context manager
-                    with nilmdb.Client(url = testurl) as c:
+                    with nilmdb.client.Client(url = testurl) as c:
                         with assert_raises(ClientError) as e:
                             c.stream_remove("/newton/prep", 123, 120)
 
     def test_client_10_context(self):
         # Test using the client's stream insertion context manager to
         # insert data.
-        client = nilmdb.Client(testurl)
+        client = nilmdb.client.Client(testurl)
 
         client.stream_create("/context/test", "uint16_1")
         with client.stream_insert_context("/context/test") as ctx:
             # override _max_data to trigger frequent server updates
             ctx._max_data = 15
 
-            with assert_raises(ValueError):
+            ctx.insert("100 1\n")
-                ctx.insert_line("100 1")
 
-            ctx.insert_line("100 1\n")
+            ctx.insert("101 ")
-            ctx.insert_iter([ "101 1\n",
+            ctx.insert("1\n102 1")
-                              "102 1\n",
+            ctx.insert("")
-                              "103 1\n" ])
+            ctx.insert("\n103 1\n")
-            ctx.insert_line("104 1\n")
+
-            ctx.insert_line("105 1\n")
+            ctx.insert("104 1\n")
+            ctx.insert("# hello\n")
+            ctx.insert("   # hello\n")
+            ctx.insert("  105 1\n")
             ctx.finalize()
 
-            ctx.insert_line("106 1\n")
+            ctx.insert("107 1\n")
-            ctx.update_end(106.5)
+            ctx.update_end(108)
             ctx.finalize()
-            ctx.update_start(106.8)
+            ctx.update_start(109)
-            ctx.insert_line("107 1\n")
+            ctx.insert("110 1\n")
-            ctx.insert_line("108 1\n")
+            ctx.insert("111 1\n")
-            ctx.insert_line("109 1\n")
+            ctx.insert("112 1\n")
-            ctx.insert_line("110 1\n")
+            ctx.insert("113 1\n")
-            ctx.insert_line("111 1\n")
+            ctx.insert("114 1\n")
-            ctx.update_end(113)
+            ctx.update_end(116)
-            ctx.insert_line("112 1\n")
+            ctx.insert("115 1\n")
-            ctx.update_end(114)
+            ctx.update_end(117)
-            ctx.insert_line("113 1\n")
+            ctx.insert("116 1\n")
-            ctx.update_end(115)
+            ctx.update_end(118)
-            ctx.insert_line("114 1\n")
+            ctx.insert("117 1" +
+                       " # this is super long" * 100 +
+                       "\n")
             ctx.finalize()
+            ctx.insert("# this is super long" * 100)
 
         with assert_raises(ClientError):
             with client.stream_insert_context("/context/test", 100, 200) as ctx:
-                ctx.insert_line("115 1\n")
+                ctx.insert("118 1\n")
 
         with assert_raises(ClientError):
             with client.stream_insert_context("/context/test", 200, 300) as ctx:
-                ctx.insert_line("115 1\n")
+                ctx.insert("118 1\n")
+
+        with assert_raises(ClientError):
+            with client.stream_insert_context("/context/test") as ctx:
+                ctx.insert("bogus data\n")
 
         with client.stream_insert_context("/context/test", 200, 300) as ctx:
             # make sure our override wasn't permanent
             ne_(ctx._max_data, 15)
-            ctx.insert_line("225 1\n")
+            ctx.insert("225 1\n")
             ctx.finalize()
 
+        with assert_raises(ClientError):
+            with client.stream_insert_context("/context/test", 300, 400) as ctx:
+                ctx.insert("301 1\n")
+                ctx.insert("302 2\n")
+                ctx.insert("303 3\n")
+                ctx.insert("304 4\n")
+                ctx.insert("304 4\n") # non-monotonic after a few lines
+                ctx.finalize()
+
         eq_(list(client.stream_intervals("/context/test")),
-            [ [ 100, 105.000001 ],
+            [ [ 100, 106 ],
-              [ 106, 106.5 ],
+              [ 107, 108 ],
-              [ 106.8, 115 ],
+              [ 109, 118 ],
               [ 200, 300 ] ])
 
+        # destroy stream (try without removing data first)
+        with assert_raises(ClientError):
+            client.stream_destroy("/context/test")
+        client.stream_remove("/context/test")
         client.stream_destroy("/context/test")
         client.close()
 
@@ -482,7 +518,7 @@ class TestClient(object):
         # Empty intervals are ok!  If recording detection events
         # by inserting rows into the database, we want to be able to
         # have an interval where no events occurred.  Test them here.
-        client = nilmdb.Client(testurl)
+        client = nilmdb.client.Client(testurl)
         client.stream_create("/empty/test", "uint16_1")
 
         def info():
@@ -497,9 +533,9 @@ class TestClient(object):
         # Insert a region with just a few points
         with client.stream_insert_context("/empty/test") as ctx:
             ctx.update_start(100)
-            ctx.insert_line("140 1\n")
+            ctx.insert("140 1\n")
-            ctx.insert_line("150 1\n")
+            ctx.insert("150 1\n")
-            ctx.insert_line("160 1\n")
+            ctx.insert("160 1\n")
             ctx.update_end(200)
             ctx.finalize()
 
@@ -512,7 +548,7 @@ class TestClient(object):
 
         # Try also creating a completely empty interval from scratch,
         # in a few different ways.
-        client.stream_insert_block("/empty/test", "", 300, 350)
+        client.stream_insert("/empty/test", "", 300, 350)
         client.stream_insert("/empty/test", [], 400, 450)
         with client.stream_insert_context("/empty/test", 500, 550):
             pass
@@ -533,10 +569,10 @@ class TestClient(object):
             ctx.finalize() # inserts [1000, 1050]
             ctx.finalize() # nothing
             ctx.finalize() # nothing
-            ctx.insert_line("1100 1\n")
+            ctx.insert("1100 1\n")
-            ctx.finalize() # inserts [1100, 1100.000001]
+            ctx.finalize() # inserts [1100, 1101]
             ctx.update_start(1199)
-            ctx.insert_line("1200 1\n")
+            ctx.insert("1200 1\n")
             ctx.update_end(1250)
             ctx.finalize() # inserts [1199, 1250]
             ctx.update_start(1299)
@@ -544,8 +580,15 @@ class TestClient(object):
             ctx.update_end(1350)
             ctx.finalize() # nothing
             ctx.update_start(1400)
+            ctx.insert("# nothing!\n")
             ctx.update_end(1450)
             ctx.finalize()
+            ctx.update_start(1500)
+            ctx.insert("# nothing!")
+            ctx.update_end(1550)
+            ctx.finalize()
+            ctx.insert("# nothing!\n" * 10)
+            ctx.finalize()
             # implicit last finalize inserts [1400, 1450]
 
         # Check everything
@@ -555,12 +598,14 @@ class TestClient(object):
                      (0, [400, 450]),
                      (0, [500, 550]),
                      (0, [1000, 1050]),
-                     (1, [1100, 1100.000001]),
+                     (1, [1100, 1101]),
                      (1, [1199, 1250]),
                      (0, [1400, 1450]),
+                     (0, [1500, 1550]),
                      ])
 
         # Clean up
+        client.stream_remove("/empty/test")
         client.stream_destroy("/empty/test")
         client.close()
 
@@ -568,7 +613,7 @@ class TestClient(object):
         # Check that connections are persistent when they should be.
         # This is pretty hard to test; we have to poke deep into
         # the Requests library.
-        with nilmdb.Client(url = testurl) as c:
+        with nilmdb.client.Client(url = testurl) as c:
             def connections():
                 try:
                     poolmanager = c.http._last_response.connection.poolmanager
@@ -596,5 +641,33 @@ class TestClient(object):
             eq_(connections(), (1, 5))
 
             # Clean up
+            c.stream_remove("/persist/test")
             c.stream_destroy("/persist/test")
-            eq_(connections(), (1, 6))
+            eq_(connections(), (1, 7))
+
+    def test_client_13_timestamp_rounding(self):
+        # Test potentially bad timestamps (due to floating point
+        # roundoff etc).  The server will round floating point values
+        # to the nearest int.
+        client = nilmdb.client.Client(testurl)
+
+        client.stream_create("/rounding/test", "uint16_1")
+        with client.stream_insert_context("/rounding/test",
+                                          100000000, 200000000.1) as ctx:
+            ctx.insert("100000000.1 1\n")
+            ctx.insert("150000000.00003 1\n")
+            ctx.insert("199999999.4 1\n")
+        eq_(list(client.stream_intervals("/rounding/test")),
+            [ [ 100000000, 200000000 ] ])
+
+        with assert_raises(ClientError):
+            with client.stream_insert_context("/rounding/test",
+                                              200000000, 300000000) as ctx:
+                ctx.insert("200000000 1\n")
+                ctx.insert("250000000 1\n")
+                # Server will round this and give an error on finalize()
+                ctx.insert("299999999.99 1\n")
+
+        client.stream_remove("/rounding/test")
+        client.stream_destroy("/rounding/test")
+        client.close()

tests/test_cmdline.py

@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 
-import nilmdb
+import nilmdb.server
+
 from nilmdb.utils.printf import *
 import nilmdb.cmdline
 from nilmdb.utils import datetime_tz
@@ -14,22 +15,24 @@ import re
 import sys
 import StringIO
 import shlex
+import warnings
 
 from testutil.helpers import *
 
 testdb = "tests/cmdline-testdb"
 
-def server_start(max_results = None, bulkdata_args = {}):
+def server_start(max_results = None, max_removals = None, bulkdata_args = {}):
     global test_server, test_db
     # Start web app on a custom port
-    test_db = nilmdb.utils.serializer_proxy(nilmdb.NilmDB)(
+    test_db = nilmdb.utils.serializer_proxy(nilmdb.server.NilmDB)(
-        testdb, sync = False,
+        testdb,
         max_results = max_results,
+        max_removals = max_removals,
         bulkdata_args = bulkdata_args)
-    test_server = nilmdb.Server(test_db, host = "127.0.0.1",
+    test_server = nilmdb.server.Server(test_db, host = "127.0.0.1",
-                                port = 32180, stoppable = False,
+                                       port = 32180, stoppable = False,
-                                fast_shutdown = True,
+                                       fast_shutdown = True,
-                                force_traceback = False)
+                                       force_traceback = False)
     test_server.start(blocking = False)
 
 def server_stop():
@@ -125,8 +128,17 @@ class TestCmdline(object):
         with open(file) as f:
             contents = f.read()
             if contents != self.captured:
-                print contents[1:1000] + "\n"
+                print "--- reference file (first 1000 bytes):\n"
-                print self.captured[1:1000] + "\n"
+                print contents[0:1000] + "\n"
+                print "--- captured data (first 1000 bytes):\n"
+                print self.captured[0:1000] + "\n"
+                zipped = itertools.izip_longest(contents, self.captured)
+                for (n, (a, b)) in enumerate(zipped):
+                    if a != b:
+                        print "--- first difference is at offset", n
+                        print "--- reference:", repr(a)
+                        print "---  captured:", repr(b)
+                        break
                 raise AssertionError("captured data doesn't match " + file)
 
     def matchfilecount(self, file):
@@ -205,9 +217,11 @@ class TestCmdline(object):
     def test_02_parsetime(self):
         os.environ['TZ'] = "America/New_York"
         test = datetime_tz.datetime_tz.now()
+        u2ts = nilmdb.utils.time.unix_to_timestamp
         parse_time = nilmdb.utils.time.parse_time
-        eq_(parse_time(str(test)), test)
+        eq_(parse_time(str(test)), u2ts(test.totimestamp()))
-        test = datetime_tz.datetime_tz.smartparse("20120405 1400-0400")
+        test = u2ts(datetime_tz.datetime_tz.smartparse("20120405 1400-0400").
+                    totimestamp())
         eq_(parse_time("hi there 20120405 1400-0400 testing! 123"), test)
         eq_(parse_time("20120405 1800 UTC"), test)
         eq_(parse_time("20120405 1400-0400 UTC"), test)
@@ -217,6 +231,13 @@ class TestCmdline(object):
         x = parse_time("now")
         eq_(parse_time("snapshot-20120405-140000.raw.gz"), test)
         eq_(parse_time("prep-20120405T1400"), test)
+        eq_(parse_time("1333648800.0"), test)
+        eq_(parse_time("1333648800000000"), test)
+        eq_(parse_time("@1333648800000000"), test)
+        eq_(parse_time("min"), nilmdb.utils.time.min_timestamp)
+        eq_(parse_time("max"), nilmdb.utils.time.max_timestamp)
+        with assert_raises(ValueError):
+            parse_time("@hashtag12345")
 
     def test_03_info(self):
         self.ok("info")
@@ -235,11 +256,20 @@ class TestCmdline(object):
         self.match("")
 
         # Bad paths
-        self.fail("create foo/bar/baz PrepData")
+        self.fail("create foo/bar/baz float32_8")
         self.contain("paths must start with /")
 
-        self.fail("create /foo PrepData")
+        self.fail("create /foo float32_8")
         self.contain("invalid path")
+        self.fail("create /newton/prep/ float32_8")
+        self.contain("invalid path")
+
+        self.fail("create /newton/_format/prep float32_8")
+        self.contain("path name is invalid")
+        self.fail("create /_format/newton/prep float32_8")
+        self.contain("path name is invalid")
+        self.fail("create /newton/prep/_format float32_8")
+        self.contain("path name is invalid")
 
         # Bad layout type
         self.fail("create /newton/prep NoSuchLayout")
@@ -250,53 +280,57 @@ class TestCmdline(object):
         self.contain("no such layout")
 
         # Create a few streams
-        self.ok("create /newton/zzz/rawnotch RawNotchedData")
+        self.ok("create /newton/zzz/rawnotch uint16_9")
-        self.ok("create /newton/prep PrepData")
+        self.ok("create /newton/prep float32_8")
-        self.ok("create /newton/raw RawData")
+        self.ok("create /newton/raw uint16_6")
+
+        # Create a stream that already exists
+        self.fail("create /newton/raw uint16_6")
+        self.contain("stream already exists at this path")
 
         # Should not be able to create a stream with another stream as
         # its parent
-        self.fail("create /newton/prep/blah PrepData")
+        self.fail("create /newton/prep/blah float32_8")
         self.contain("path is subdir of existing node")
 
         # Should not be able to create a stream at a location that
         # has other nodes as children
-        self.fail("create /newton/zzz PrepData")
+        self.fail("create /newton/zzz float32_8")
         self.contain("subdirs of this path already exist")
 
         # Verify we got those 3 streams and they're returned in
         # alphabetical order.
         self.ok("list")
-        self.match("/newton/prep PrepData\n"
+        self.match("/newton/prep float32_8\n"
-                   "/newton/raw RawData\n"
+                   "/newton/raw uint16_6\n"
-                   "/newton/zzz/rawnotch RawNotchedData\n")
+                   "/newton/zzz/rawnotch uint16_9\n")
 
         # Match just one type or one path.  Also check
         # that --path is optional
         self.ok("list --path /newton/raw")
-        self.match("/newton/raw RawData\n")
+        self.match("/newton/raw uint16_6\n")
 
         self.ok("list /newton/raw")
-        self.match("/newton/raw RawData\n")
+        self.match("/newton/raw uint16_6\n")
 
         self.fail("list -p /newton/raw /newton/raw")
         self.contain("too many paths")
 
-        self.ok("list --layout RawData")
+        self.ok("list --layout uint16_6")
-        self.match("/newton/raw RawData\n")
+        self.match("/newton/raw uint16_6\n")
 
         # Wildcard matches
-        self.ok("list --layout Raw*")
+        self.ok("list --layout uint16*")
-        self.match("/newton/raw RawData\n"
+        self.match("/newton/raw uint16_6\n"
-                   "/newton/zzz/rawnotch RawNotchedData\n")
+                   "/newton/zzz/rawnotch uint16_9\n")
 
-        self.ok("list --path *zzz* --layout Raw*")
+        self.ok("list --path *zzz* --layout uint16*")
-        self.match("/newton/zzz/rawnotch RawNotchedData\n")
+        self.match("/newton/zzz/rawnotch uint16_9\n")
 
-        self.ok("list *zzz* --layout Raw*")
+        self.ok("list *zzz* --layout uint16*")
-        self.match("/newton/zzz/rawnotch RawNotchedData\n")
+        self.match("/newton/zzz/rawnotch uint16_9\n")
 
-        self.ok("list --path *zzz* --layout Prep*")
+        self.ok("list --path *zzz* --layout float32*")
         self.match("")
 
         # reversed range
@@ -363,43 +397,49 @@ class TestCmdline(object):
     def test_06_insert(self):
         self.ok("insert --help")
 
-        self.fail("insert /foo/bar baz qwer")
+        self.fail("insert -s 2000 -e 2001 /foo/bar baz")
         self.contain("error getting stream info")
 
-        self.fail("insert /newton/prep baz qwer")
+        self.fail("insert -s 2000 -e 2001 /newton/prep baz")
         self.match("error opening input file baz\n")
 
-        self.fail("insert /newton/prep")
+        self.fail("insert /newton/prep --timestamp -f -r 120")
-        self.contain("error extracting time")
+        self.contain("error extracting start time")
 
-        self.fail("insert --start 19801205 /newton/prep 1 2 3 4")
+        self.fail("insert /newton/prep --timestamp -r 120")
-        self.contain("--start can only be used with one input file")
+        self.contain("need --start or --filename")
 
         self.fail("insert /newton/prep "
                   "tests/data/prep-20120323T1000")
 
-        # insert pre-timestamped data, from stdin
-        os.environ['TZ'] = "UTC"
-        with open("tests/data/prep-20120323T1004-timestamped") as input:
-            self.ok("insert --none /newton/prep", input)
-
         # insert pre-timestamped data, with bad times (non-monotonic)
         os.environ['TZ'] = "UTC"
         with open("tests/data/prep-20120323T1004-badtimes") as input:
-            self.fail("insert --none /newton/prep", input)
+            self.fail("insert -s 20120323T1004 -e 20120323T1006 /newton/prep",
+                      input)
             self.contain("error parsing input data")
-            self.contain("line 7:")
+            self.contain("line 7")
             self.contain("timestamp is not monotonically increasing")
 
+        # insert pre-timestamped data, from stdin
+        os.environ['TZ'] = "UTC"
+        with open("tests/data/prep-20120323T1004-timestamped") as input:
+            self.ok("insert -s 20120323T1004 -e 20120323T1006 /newton/prep",
+                    input)
+
         # insert data with normal timestamper from filename
         os.environ['TZ'] = "UTC"
-        self.ok("insert --rate 120 /newton/prep "
+        self.ok("insert --timestamp -f --rate 120 /newton/prep "
-                "tests/data/prep-20120323T1000 "
+                "tests/data/prep-20120323T1000")
+        self.fail("insert -t --filename /newton/prep "
+                "tests/data/prep-20120323T1002")
+        self.contain("rate is needed")
+        self.ok("insert -t --filename --rate 120 /newton/prep "
                 "tests/data/prep-20120323T1002")
 
         # overlap
         os.environ['TZ'] = "UTC"
-        self.fail("insert --rate 120 /newton/prep "
+        self.fail("insert --timestamp -f --rate 120 /newton/prep "
                   "tests/data/prep-20120323T1004")
         self.contain("overlap")
 
@@ -411,24 +451,33 @@ class TestCmdline(object):
 
         # still an overlap if we specify a different start
         os.environ['TZ'] = "America/New_York"
-        self.fail("insert --rate 120 --start '03/23/2012 06:05:00' /newton/prep"
+        self.fail("insert -t -r 120 --start '03/23/2012 06:05:00' /newton/prep"
                   " tests/data/prep-20120323T1004")
         self.contain("overlap")
 
         # wrong format
         os.environ['TZ'] = "UTC"
-        self.fail("insert --rate 120 /newton/raw "
+        self.fail("insert -t -r 120 -f /newton/raw "
                   "tests/data/prep-20120323T1004")
         self.contain("error parsing input data")
+        self.contain("can't parse value")
+
+        # too few rows per line
+        self.ok("create /insert/test float32_20")
+        self.fail("insert -t -r 120 -f /insert/test "
+                  "tests/data/prep-20120323T1004")
+        self.contain("error parsing input data")
+        self.contain("wrong number of values")
+        self.ok("destroy /insert/test")
 
         # empty data does nothing
-        self.ok("insert --rate 120 --start '03/23/2012 06:05:00' /newton/prep "
+        self.ok("insert -t -r 120 --start '03/23/2012 06:05:00' /newton/prep "
                 "/dev/null")
 
         # bad start time
-        self.fail("insert --rate 120 --start 'whatever' /newton/prep /dev/null")
+        self.fail("insert -t -r 120 --start 'whatever' /newton/prep /dev/null")
 
-    def test_07_detail_extent(self):
+    def test_07_detail_extended(self):
         # Just count the number of lines, it's probably fine
         self.ok("list --detail")
         lines_(self.captured, 8)
@@ -466,23 +515,28 @@ class TestCmdline(object):
         self.ok("list --detail --path *prep --timestamp-raw "
                 "--start='23 Mar 2012 10:05:15.50'")
         lines_(self.captured, 2)
-        self.contain("[ 1332497115.5 -> 1332497159.991668 ]")
+        self.contain("[ 1332497115500000 -> 1332497160000000 ]")
 
-        self.ok("list --detail --path *prep -T "
+        # bad time
-                "--start='23 Mar 2012 10:05:15.612'")
+        self.fail("list --detail --path *prep -T --start='9332497115.612'")
+        # good time
+        self.ok("list --detail --path *prep -T --start='1332497115.612'")
         lines_(self.captured, 2)
-        self.contain("[ 1332497115.612 -> 1332497159.991668 ]")
+        self.contain("[ 1332497115612000 -> 1332497160000000 ]")
 
-        # Check --extent output
+        # Check --ext output
-        self.ok("list --extent")
+        self.ok("list --ext")
-        lines_(self.captured, 6)
+        lines_(self.captured, 9)
 
         self.ok("list -E -T")
-        self.contain("  extent: 1332496800 -> 1332497159.991668")
+        c = self.contain
-        self.contain("  extent: (no data)")
+        c("\n  interval extents: 1332496800000000 -> 1332497160000000\n")
+        c("\n        total data: 43200 rows, 359.983336 seconds\n")
+        c("\n  interval extents: (no data)\n")
+        c("\n        total data: 0 rows, 0.000000 seconds\n")
 
         # Misc
-        self.fail("list --extent --start='23 Mar 2012 10:05:15.50'")
+        self.fail("list --ext --start='23 Mar 2012 10:05:15.50'")
         self.contain("--start and --end only make sense with --detail")
 
     def test_08_extract(self):
@@ -594,13 +648,13 @@ class TestCmdline(object):
 
         # Make sure we have the data we expect
         self.ok("list --detail /newton/prep")
-        self.match("/newton/prep PrepData\n" +
+        self.match("/newton/prep float32_8\n" +
                    "  [ Fri, 23 Mar 2012 10:00:00.000000 +0000"
                    " -> Fri, 23 Mar 2012 10:01:59.991668 +0000 ]\n"
                    "  [ Fri, 23 Mar 2012 10:02:00.000000 +0000"
                    " -> Fri, 23 Mar 2012 10:03:59.991668 +0000 ]\n"
                    "  [ Fri, 23 Mar 2012 10:04:00.000000 +0000"
-                   " -> Fri, 23 Mar 2012 10:05:59.991668 +0000 ]\n")
+                   " -> Fri, 23 Mar 2012 10:06:00.000000 +0000 ]\n")
 
         # Remove various chunks of prep data and make sure
         # they're gone.
@@ -629,7 +683,7 @@ class TestCmdline(object):
 
         # See the missing chunks in list output
         self.ok("list --detail /newton/prep")
-        self.match("/newton/prep PrepData\n" +
+        self.match("/newton/prep float32_8\n" +
                    "  [ Fri, 23 Mar 2012 10:00:00.000000 +0000"
                    " -> Fri, 23 Mar 2012 10:00:05.000000 +0000 ]\n"
                    "  [ Fri, 23 Mar 2012 10:00:25.000000 +0000"
@@ -643,15 +697,14 @@ class TestCmdline(object):
         self.ok("remove /newton/prep --start 2000-01-01 --end 2020-01-01")
         self.match("")  # no count requested this time
         self.ok("list --detail /newton/prep")
-        self.match("/newton/prep PrepData\n" +
+        self.match("/newton/prep float32_8\n" +
                    "  (no intervals)\n")
 
         # Reinsert some data, to verify that no overlaps with deleted
         # data are reported
-        os.environ['TZ'] = "UTC"
+        for minute in ["0", "2"]:
-        self.ok("insert --rate 120 /newton/prep "
+            self.ok("insert --timestamp -f --rate 120 /newton/prep"
-                "tests/data/prep-20120323T1000 "
+                    " tests/data/prep-20120323T100" + minute)
-                "tests/data/prep-20120323T1002")
 
     def test_11_destroy(self):
         # Delete records
@@ -663,32 +716,42 @@ class TestCmdline(object):
         self.fail("destroy /no/such/stream")
         self.contain("No stream at path")
 
+        self.fail("destroy -R /no/such/stream")
+        self.contain("No stream at path")
+
         self.fail("destroy asdfasdf")
         self.contain("No stream at path")
 
         # From previous tests, we have:
         self.ok("list")
-        self.match("/newton/prep PrepData\n"
+        self.match("/newton/prep float32_8\n"
-                   "/newton/raw RawData\n"
+                   "/newton/raw uint16_6\n"
-                   "/newton/zzz/rawnotch RawNotchedData\n")
+                   "/newton/zzz/rawnotch uint16_9\n")
 
         # Notice how they're not empty
         self.ok("list --detail")
         lines_(self.captured, 7)
 
-        # Delete some
+        # Fail to destroy because intervals still present
-        self.ok("destroy /newton/prep")
+        self.fail("destroy /newton/prep")
+        self.contain("all intervals must be removed")
+        self.ok("list --detail")
+        lines_(self.captured, 7)
+
+        # Destroy for real
+        self.ok("destroy -R /newton/prep")
         self.ok("list")
-        self.match("/newton/raw RawData\n"
+        self.match("/newton/raw uint16_6\n"
-                   "/newton/zzz/rawnotch RawNotchedData\n")
+                   "/newton/zzz/rawnotch uint16_9\n")
 
         self.ok("destroy /newton/zzz/rawnotch")
         self.ok("list")
-        self.match("/newton/raw RawData\n")
+        self.match("/newton/raw uint16_6\n")
 
         self.ok("destroy /newton/raw")
-        self.ok("create /newton/raw RawData")
+        self.ok("create /newton/raw uint16_6")
-        self.ok("destroy /newton/raw")
+        # Specify --remove with no data
+        self.ok("destroy --remove /newton/raw")
         self.ok("list")
         self.match("")
 
@@ -697,7 +760,7 @@ class TestCmdline(object):
                     "/newton/raw", "/newton/asdf/qwer" ]
         for path in rebuild:
             # Create the path
-            self.ok("create " + path + " PrepData")
+            self.ok("create " + path + " float32_8")
             self.ok("list")
             self.contain(path)
             # Make sure it was created empty
@@ -735,7 +798,8 @@ class TestCmdline(object):
         self.ok("create /newton/prep float32_8")
         os.environ['TZ'] = "UTC"
         with open("tests/data/prep-20120323T1004-timestamped") as input:
-            self.ok("insert --none /newton/prep", input)
+            self.ok("insert -s 20120323T1004 -e 20120323T1006 /newton/prep",
+                    input)
 
         # Extract it
         self.ok("extract /newton/prep --start '2000-01-01' " +
@@ -762,31 +826,35 @@ class TestCmdline(object):
 
         # Now recreate the data one more time and make sure there are
         # fewer files.
-        self.ok("destroy /newton/prep")
+        self.ok("destroy --remove /newton/prep")
         self.fail("destroy /newton/prep") # already destroyed
         self.ok("create /newton/prep float32_8")
         os.environ['TZ'] = "UTC"
         with open("tests/data/prep-20120323T1004-timestamped") as input:
-            self.ok("insert --none /newton/prep", input)
+            self.ok("insert -s 20120323T1004 -e 20120323T1006 /newton/prep",
+                    input)
         nfiles = 0
         for (dirpath, dirnames, filenames) in os.walk(testdb):
             nfiles += len(filenames)
         lt_(nfiles, 50)
-        self.ok("destroy /newton/prep") # destroy again
+        self.ok("destroy -R /newton/prep") # destroy again
 
     def test_14_remove_files(self):
         # Test BulkData's ability to remove when data is split into
         # multiple files.  Should be a fairly comprehensive test of
         # remove functionality.
+        # Also limit max_removals, to cover more functionality.
         server_stop()
-        server_start(bulkdata_args = { "file_size" : 920, # 23 rows per file
+        server_start(max_removals = 4321,
+                     bulkdata_args = { "file_size" : 920, # 23 rows per file
                                        "files_per_dir" : 3 })
 
         # Insert data.  Just for fun, insert out of order
-        self.ok("create /newton/prep PrepData")
+        self.ok("create /newton/prep float32_8")
         os.environ['TZ'] = "UTC"
-        self.ok("insert --rate 120 /newton/prep "
+        self.ok("insert -t --filename --rate 120 /newton/prep "
-                "tests/data/prep-20120323T1002 "
+                "tests/data/prep-20120323T1002")
+        self.ok("insert -t --filename --rate 120 /newton/prep "
                 "tests/data/prep-20120323T1000")
 
         # Should take up about 2.8 MB here (including directory entries)
@@ -794,7 +862,7 @@ class TestCmdline(object):
 
         # Make sure we have the data we expect
         self.ok("list --detail")
-        self.match("/newton/prep PrepData\n" +
+        self.match("/newton/prep float32_8\n" +
                    "  [ Fri, 23 Mar 2012 10:00:00.000000 +0000"
                    " -> Fri, 23 Mar 2012 10:01:59.991668 +0000 ]\n"
                    "  [ Fri, 23 Mar 2012 10:02:00.000000 +0000"
@@ -830,7 +898,7 @@ class TestCmdline(object):
 
         # See the missing chunks in list output
         self.ok("list --detail")
-        self.match("/newton/prep PrepData\n" +
+        self.match("/newton/prep float32_8\n" +
                    "  [ Fri, 23 Mar 2012 10:00:00.000000 +0000"
                    " -> Fri, 23 Mar 2012 10:00:05.000000 +0000 ]\n"
                    "  [ Fri, 23 Mar 2012 10:00:25.000000 +0000"
@@ -851,7 +919,7 @@ class TestCmdline(object):
         # With the specific file_size above, this will cause the last
         # file in the bulk data storage to be exactly file_size large,
         # so removing the data should also remove that last file.
-        self.ok("insert --rate 120 /newton/prep " +
+        self.ok("insert --timestamp -f --rate 120 /newton/prep " +
                 "tests/data/prep-20120323T1002-first19lines")
         self.ok("remove /newton/prep " +
                 "--start '23 Mar 2012 10:02:00' --end '2020-01-01'")
@@ -862,8 +930,144 @@ class TestCmdline(object):
 
         # Re-add the full 10:02 data file.  This tests adding new data once
         # we removed data near the end.
-        self.ok("insert --rate 120 /newton/prep tests/data/prep-20120323T1002")
+        self.ok("insert -t -f -r 120 /newton/prep "
+                "tests/data/prep-20120323T1002")
 
         # See if we can extract it all
         self.ok("extract /newton/prep --start 2000-01-01 --end 2020-01-01")
         lines_(self.captured, 15600)
+
+    def test_15_intervals_diff(self):
+        # Test "intervals" and "intervals --diff" command.
+        os.environ['TZ'] = "UTC"
+
+        self.ok("create /diff/1 uint8_1")
+        self.match("")
+        self.ok("intervals /diff/1")
+        self.match("")
+        self.ok("intervals /diff/1 --diff /diff/1")
+        self.match("")
+        self.ok("intervals --diff /diff/1 /diff/1")
+        self.match("")
+        self.fail("intervals /diff/2")
+        self.fail("intervals /diff/1 -d /diff/2")
+
+        self.ok("create /diff/2 uint8_1")
+        self.ok("intervals -T /diff/1 -d /diff/2")
+        self.match("")
+        self.ok("insert -s 01-01-2000 -e 01-01-2001 /diff/1 /dev/null")
+
+        self.ok("intervals /diff/1")
+        self.match("[ Sat, 01 Jan 2000 00:00:00.000000 +0000 -"
+                   "> Mon, 01 Jan 2001 00:00:00.000000 +0000 ]\n")
+
+        self.ok("intervals /diff/1 -d /diff/2")
+        self.match("[ Sat, 01 Jan 2000 00:00:00.000000 +0000 -"
+                   "> Mon, 01 Jan 2001 00:00:00.000000 +0000 ]\n")
+
+        self.ok("insert -s 01-01-2000 -e 01-01-2001 /diff/2 /dev/null")
+        self.ok("intervals /diff/1 -d /diff/2")
+        self.match("")
+
+        self.ok("insert -s 01-01-2001 -e 01-01-2002 /diff/1 /dev/null")
+        self.ok("insert -s 01-01-2002 -e 01-01-2003 /diff/2 /dev/null")
+        self.ok("intervals /diff/1 -d /diff/2")
+        self.match("[ Mon, 01 Jan 2001 00:00:00.000000 +0000 -"
+                   "> Tue, 01 Jan 2002 00:00:00.000000 +0000 ]\n")
+
+        self.ok("insert -s 01-01-2004 -e 01-01-2005 /diff/1 /dev/null")
+        self.ok("intervals /diff/1 -d /diff/2")
+        self.match("[ Mon, 01 Jan 2001 00:00:00.000000 +0000 -"
+                   "> Tue, 01 Jan 2002 00:00:00.000000 +0000 ]\n"
+                   "[ Thu, 01 Jan 2004 00:00:00.000000 +0000 -"
+                   "> Sat, 01 Jan 2005 00:00:00.000000 +0000 ]\n")
+
+        self.fail("intervals -s 01-01-2003 -e 01-01-2000 /diff/1 -d /diff/2")
+        self.ok("intervals -s 01-01-2003 -e 01-01-2008 /diff/1 -d /diff/2")
+        self.match("[ Thu, 01 Jan 2004 00:00:00.000000 +0000 -"
+                   "> Sat, 01 Jan 2005 00:00:00.000000 +0000 ]\n")
+
+        self.ok("destroy -R /diff/1")
+        self.ok("destroy -R /diff/2")
+
+    def test_16_rename(self):
+        # Test renaming.  Force file size smaller so we get more files
+        server_stop()
+        recursive_unlink(testdb)
+        server_start(bulkdata_args = { "file_size" : 920, # 23 rows per file
+                                       "files_per_dir" : 3 })
+
+
+        # Fill data
+        self.ok("create /newton/prep float32_8")
+        os.environ['TZ'] = "UTC"
+        with open("tests/data/prep-20120323T1004-timestamped") as input:
+            self.ok("insert -s 20120323T1004 -e 20120323T1006 /newton/prep",
+                    input)
+
+        # Extract it
+        self.ok("extract /newton/prep --start '2000-01-01' " +
+                "--end '2012-03-23 10:04:01'")
+        extract_before = self.captured
+
+        def check_path(*components):
+            # Verify the paths look right on disk
+            seek = os.path.join(testdb, "data", *components)
+            for (dirpath, dirnames, filenames) in os.walk(testdb):
+                if "_format" in filenames:
+                    if dirpath == seek:
+                        break
+                    raise AssertionError("data also found at " + dirpath)
+            else:
+                raise AssertionError("data not found at " + seek)
+            # Verify "list" output
+            self.ok("list")
+            self.match("/" + "/".join(components) + " float32_8\n")
+
+        # Lots of renames
+        check_path("newton", "prep")
+
+        self.fail("rename /newton/prep /newton/prep")
+        self.contain("old and new paths are the same")
+        check_path("newton", "prep")
+        self.fail("rename /newton/prep /newton")
+        self.contain("subdirs of this path already exist")
+        self.fail("rename /newton/prep /newton/prep/")
+        self.contain("invalid path")
+        self.ok("rename /newton/prep /newton/foo")
+        check_path("newton", "foo")
+        self.ok("rename /newton/foo /totally/different/thing")
+        check_path("totally", "different", "thing")
+        self.ok("rename /totally/different/thing /totally/something")
+        check_path("totally", "something")
+        self.ok("rename /totally/something /totally/something/cool")
+        check_path("totally", "something", "cool")
+        self.ok("rename /totally/something/cool /foo/bar")
+        check_path("foo", "bar")
+        self.ok("create /xxx/yyy/zzz float32_8")
+        self.fail("rename /foo/bar /xxx/yyy")
+        self.contain("subdirs of this path already exist")
+        self.fail("rename /foo/bar /xxx/yyy/zzz")
+        self.contain("stream already exists at this path")
+        self.fail("rename /foo/bar /xxx/yyy/zzz/www")
+        self.contain("path is subdir of existing node")
+        self.ok("rename /foo/bar /xxx/yyy/mmm")
+        self.ok("destroy -R /xxx/yyy/zzz")
+        check_path("xxx", "yyy", "mmm")
+
+        # Extract it at the final path
+        self.ok("extract /xxx/yyy/mmm --start '2000-01-01' " +
+                "--end '2012-03-23 10:04:01'")
+        eq_(self.captured, extract_before)
+
+        self.ok("destroy -R /xxx/yyy/mmm")
+
+        # Make sure temporary rename dirs weren't left around
+        for (dirpath, dirnames, filenames) in os.walk(testdb):
+            if "rename-" in dirpath:
+                raise AssertionError("temporary directories not cleaned up")
+            if "totally" in dirpath or "newton" in dirpath:
+                raise AssertionError("old directories not cleaned up")
+
+        server_stop()
+        server_start()

tests/test_interval.py

@@ -8,8 +8,11 @@ from nose.tools import *
 from nose.tools import assert_raises
 import itertools
 
-from nilmdb.server.interval import (Interval, DBInterval,
+from nilmdb.utils.interval import IntervalError
-                                    IntervalSet, IntervalError)
+from nilmdb.server.interval import Interval, DBInterval, IntervalSet
+
+# so we can test them separately
+from nilmdb.utils.interval import Interval as UtilsInterval
 
 from testutil.helpers import *
 import unittest
@@ -47,11 +50,20 @@ def makeset(string):
     return iset
 
 class TestInterval:
+    def test_client_interval(self):
+        # Run interval tests against the Python version of Interval.
+        global Interval
+        NilmdbInterval = Interval
+        Interval = UtilsInterval
+        self.test_interval()
+        self.test_interval_intersect()
+        Interval = NilmdbInterval
+
     def test_interval(self):
         # Test Interval class
         os.environ['TZ'] = "America/New_York"
         datetime_tz._localtz = None
-        (d1, d2, d3) = [ datetime_tz.datetime_tz.smartparse(x).totimestamp()
+        (d1, d2, d3) = [ nilmdb.utils.time.parse_time(x)
                          for x in [ "03/24/2012", "03/25/2012", "03/26/2012" ] ]
 
         # basic construction
@@ -77,8 +89,8 @@ class TestInterval:
         assert(Interval(d1, d3) > Interval(d1, d2))
         assert(Interval(d1, d2) < Interval(d2, d3))
         assert(Interval(d1, d3) < Interval(d2, d3))
-        assert(Interval(d2, d2+0.01) > Interval(d1, d3))
+        assert(Interval(d2, d2+1) > Interval(d1, d3))
-        assert(Interval(d3, d3+0.01) == Interval(d3, d3+0.01))
+        assert(Interval(d3, d3+1) == Interval(d3, d3+1))
         #with assert_raises(TypeError): # was AttributeError, that's wrong
         #    x = (i == 123)
 
@@ -87,16 +99,16 @@ class TestInterval:
         with assert_raises(IntervalError):
             x = Interval(d2, d3).subset(d1, d2)
 
-        # big integers and floats
+        # big integers, negative integers
-        x = Interval(5000111222, 6000111222)
+        x = Interval(5000111222000000, 6000111222000000)
-        eq_(str(x), "[5000111222.0 -> 6000111222.0)")
+        eq_(str(x), "[5000111222000000 -> 6000111222000000)")
-        x = Interval(123.45, 234.56)
+        x = Interval(-5000111222000000, -4000111222000000)
-        eq_(str(x), "[123.45 -> 234.56)")
+        eq_(str(x), "[-5000111222000000 -> -4000111222000000)")
 
         # misc
         i = Interval(d1, d2)
         eq_(repr(i), repr(eval(repr(i))))
-        eq_(str(i), "[1332561600.0 -> 1332648000.0)")
+        eq_(str(i), "[1332561600000000 -> 1332648000000000)")
 
     def test_interval_intersect(self):
         # Test Interval intersections
@@ -192,7 +204,8 @@ class TestInterval:
 
         # misc
         eq_(repr(iset), repr(eval(repr(iset))))
-        eq_(str(iset), "[[100.0 -> 200.0), [200.0 -> 300.0)]")
+        eq_(str(iset),
+            "[[100 -> 200), [200 -> 300)]")
 
     def test_intervalset_geniset(self):
         # Test basic iset construction
@@ -207,64 +220,90 @@ class TestInterval:
             makeset("  [-|-----|"))
 
 
-    def test_intervalset_intersect(self):
+    def test_intervalset_intersect_difference(self):
         # Test intersection (&)
         with assert_raises(TypeError): # was AttributeError
             x = makeset("[--)") & 1234
 
-        # Intersection with interval
+        def do_test(a, b, c, d):
-        eq_(makeset("[---|---)[)") &
+            # a & b == c
-            list(makeset("  [------) "))[0],
+            ab = IntervalSet()
-            makeset("  [-----)  "))
+            for x in b:
+                for i in (a & x):
+                    ab += i
+            eq_(ab,c)
 
-        # Intersection with sets
+            # a \ b == d
-        eq_(makeset("[---------)") &
+            eq_(IntervalSet(nilmdb.utils.interval.set_difference(a,b)), d)
-            makeset(" [---)     "),
-            makeset(" [---)     "))
 
-        eq_(makeset(" [---)     ") &
+        # Intersection with intervals
-            makeset("[---------)"),
+        do_test(makeset("[---|---)[)"),
-            makeset(" [---)     "))
+                makeset("  [------) "),
+                makeset("  [-----)  "), # intersection
+                makeset("[-)      [)")) # difference
 
-        eq_(makeset("    [-----)") &
+        do_test(makeset("[---------)"),
-            makeset(" [-----)   "),
+                makeset(" [---)     "),
-            makeset("    [--)   "))
+                makeset(" [---)     "), # intersection
+                makeset("[)   [----)")) # difference
 
-        eq_(makeset(" [--)  [--)") &
+        do_test(makeset(" [---)     "),
-            makeset("  [------) "),
+                makeset("[---------)"),
-            makeset("  [-)  [-) "))
+                makeset(" [---)     "), # intersection
+                makeset("           ")) # difference
 
-        eq_(makeset("      [---)") &
+        do_test(makeset("    [-----)"),
-            makeset(" [--)      "),
+                makeset(" [-----)   "),
-            makeset("           "))
+                makeset("    [--)   "), # intersection
+                makeset("       [--)")) # difference
 
-        eq_(makeset("    [-|---)") &
+        do_test(makeset(" [--)  [--)"),
-            makeset(" [-----|-) "),
+                makeset("  [------) "),
-            makeset("    [----) "))
+                makeset("  [-)  [-) "), # intersection
+                makeset(" [)      [)")) # difference
 
-        eq_(makeset("    [-|-)  ") &
+        do_test(makeset("      [---)"),
-            makeset(" [-|--|--) "),
+                makeset(" [--)      "),
-            makeset("    [---)  "))
+                makeset("           "), # intersection
+                makeset("      [---)")) # difference
+
+        do_test(makeset("    [-|---)"),
+                makeset(" [-----|-) "),
+                makeset("    [----) "), # intersection
+                makeset("         [)")) # difference
+
+        do_test(makeset("    [-|-)  "),
+                makeset(" [-|--|--) "),
+                makeset("    [---)  "), # intersection
+                makeset("           ")) # difference
+
+        do_test(makeset("[-)[-)[-)[)"),
+                makeset(" [)  [|)[) "),
+                makeset(" [)   [)   "), # intersection
+                makeset("[) [-) [)[)")) # difference
 
         # Border cases -- will give different results if intervals are
-        # half open or fully closed.  Right now, they are half open,
+        # half open or fully closed.  In nilmdb, they are half open.
-        # although that's a little messy since the database intervals
+        do_test(makeset("      [---)"),
-        # often contain a data point at the endpoint.
-        half_open = True
-        if half_open:
-            eq_(makeset("      [---)") &
                 makeset(" [----)    "),
-                makeset("           "))
+                makeset("           "), # intersection
-            eq_(makeset(" [----)[--)") &
+                makeset("      [---)")) # difference
+
+        do_test(makeset(" [----)[--)"),
                 makeset("[-) [--) [)"),
-                makeset(" [) [-)  [)"))
+                makeset(" [) [-)  [)"), # intersection
-        else:
+                makeset("  [-)  [-) ")) # difference
-            eq_(makeset("      [---)") &
+
-                makeset(" [----)    "),
+        # Set difference with bounds
-                makeset("      .    "))
+        a = makeset(" [----)[--)")
-            eq_(makeset(" [----)[--)") &
+        b = makeset("[-) [--) [)")
-                makeset("[-) [--) [)"),
+        c = makeset("[----)     ")
-                makeset(" [) [-). [)"))
+        d = makeset("  [-)      ")
+        eq_(nilmdb.utils.interval.set_difference(
+            a.intersection(list(c)[0]), b.intersection(list(c)[0])), d)
+
+        # Empty second set
+        eq_(nilmdb.utils.interval.set_difference(a, IntervalSet()), a)
 
 class TestIntervalDB:
     def test_dbinterval(self):
@@ -353,7 +392,7 @@ class TestIntervalSpeed:
         print
         yappi.start()
         speeds = {}
-        limit = 10 # was 20
+        limit = 22 # was 20
         for j in [ 2**x for x in range(5,limit) ]:
             start = time.time()
             iset = IntervalSet()
@@ -370,4 +409,3 @@ class TestIntervalSpeed:
         aplotter.plot(speeds.keys(), speeds.values(), plot_slope=True)
         yappi.stop()
         yappi.print_stats(sort_type=yappi.SORTTYPE_TTOT, limit=10)
-

tests/test_layout.py

@@ -1,264 +0,0 @@
-# -*- coding: utf-8 -*-
-
-import nilmdb
-
-from nilmdb.utils.printf import *
-
-from nose.tools import *
-from nose.tools import assert_raises
-import distutils.version
-import itertools
-import os
-import sys
-import random
-import unittest
-
-from testutil.helpers import *
-
-from nilmdb.server.layout import *
-
-class TestLayouts(object):
-    # Some nilmdb.layout tests.  Not complete, just fills in missing
-    # coverage.
-    def test_layouts(self):
-        x = nilmdb.server.layout.get_named("PrepData")
-        y = nilmdb.server.layout.get_named("float32_8")
-        eq_(x.count, y.count)
-        eq_(x.datatype, y.datatype)
-        y = nilmdb.server.layout.get_named("float32_7")
-        ne_(x.count, y.count)
-        eq_(x.datatype, y.datatype)
-
-    def test_parsing(self):
-        self.real_t_parsing("PrepData", "RawData", "RawNotchedData")
-        self.real_t_parsing("float32_8", "uint16_6", "uint16_9")
-    def real_t_parsing(self, name_prep, name_raw, name_rawnotch):
-        # invalid layouts
-        with assert_raises(TypeError) as e:
-            parser = Parser("NoSuchLayout")
-        with assert_raises(TypeError) as e:
-            parser = Parser("float32")
-
-        # too little data
-        parser = Parser(name_prep)
-        data = ( "1234567890.000000 1.1 2.2 3.3 4.4 5.5\n" +
-                 "1234567890.100000 1.1 2.2 3.3 4.4 5.5\n")
-        with assert_raises(ParserError) as e:
-            parser.parse(data)
-        in_("error", str(e.exception))
-
-        # too much data
-        parser = Parser(name_prep)
-        data = ( "1234567890.000000 1.1 2.2 3.3 4.4 5.5 6.6 7.7 8.8 9.9\n" +
-                 "1234567890.100000 1.1 2.2 3.3 4.4 5.5 6.6 7.7 8.8 9.9\n")
-        with assert_raises(ParserError) as e:
-            parser.parse(data)
-        in_("error", str(e.exception))
-
-        # just right
-        parser = Parser(name_prep)
-        data = ( "1234567890.000000 1.1 2.2 3.3 4.4 5.5 6.6 7.7 8.8\n" +
-                 "1234567890.100000 1.1 2.2 3.3 4.4 5.5 6.6 7.7 8.8\n")
-        parser.parse(data)
-        eq_(parser.min_timestamp, 1234567890.0)
-        eq_(parser.max_timestamp, 1234567890.1)
-        eq_(parser.data, [[1234567890.0,1.1,2.2,3.3,4.4,5.5,6.6,7.7,8.8],
-                          [1234567890.1,1.1,2.2,3.3,4.4,5.5,6.6,7.7,8.8]])
-
-        # try RawData too, with clamping
-        parser = Parser(name_raw)
-        data = ( "1234567890.000000 1 2 3 4 5 6\n" +
-                 "1234567890.100000 1 2 3 4 5 6\n" )
-        parser.parse(data)
-        eq_(parser.data, [[1234567890.0,1,2,3,4,5,6],
-                          [1234567890.1,1,2,3,4,5,6]])
-
-        # pass an instantiated class
-        parser = Parser(get_named(name_rawnotch))
-        data = ( "1234567890.000000 1 2 3 4 5 6 7 8 9\n" +
-                 "1234567890.100000 1 2 3 4 5 6 7 8 9\n" )
-        parser.parse(data)
-
-        # non-monotonic
-        parser = Parser(name_raw)
-        data = ( "1234567890.100000 1 2 3 4 5 6\n" +
-                 "1234567890.099999 1 2 3 4 5 6\n" )
-        with assert_raises(ParserError) as e:
-            parser.parse(data)
-        in_("not monotonically increasing", str(e.exception))
-
-        parser = Parser(name_raw)
-        data = ( "1234567890.100000 1 2 3 4 5 6\n" +
-                 "1234567890.100000 1 2 3 4 5 6\n" )
-        with assert_raises(ParserError) as e:
-            parser.parse(data)
-        in_("not monotonically increasing", str(e.exception))
-
-        parser = Parser(name_raw)
-        data = ( "1234567890.100000 1 2 3 4 5 6\n" +
-                 "1234567890.100001 1 2 3 4 5 6\n" )
-        parser.parse(data)
-
-        # RawData with values out of bounds
-        parser = Parser(name_raw)
-        data = ( "1234567890.000000 1 2 3 4 500000 6\n" +
-                 "1234567890.100000 1 2 3 4 5 6\n" )
-        with assert_raises(ParserError) as e:
-            parser.parse(data)
-        in_("value out of range", str(e.exception))
-
-        # Empty data should work but is useless
-        parser = Parser(name_raw)
-        data = ""
-        parser.parse(data)
-        assert(parser.min_timestamp is None)
-        assert(parser.max_timestamp is None)
-
-    def test_formatting(self):
-        self.real_t_formatting("PrepData", "RawData", "RawNotchedData")
-        self.real_t_formatting("float32_8", "uint16_6", "uint16_9")
-    def real_t_formatting(self, name_prep, name_raw, name_rawnotch):
-        # invalid layout
-        with assert_raises(TypeError) as e:
-            formatter = Formatter("NoSuchLayout")
-
-        # too little data
-        formatter = Formatter(name_prep)
-        data = [ [ 1234567890.000000, 1.1, 2.2, 3.3, 4.4, 5.5 ],
-                 [ 1234567890.100000, 1.1, 2.2, 3.3, 4.4, 5.5 ] ]
-        with assert_raises(FormatterError) as e:
-            formatter.format(data)
-        in_("error", str(e.exception))
-
-        # too much data
-        formatter = Formatter(name_prep)
-        data = [ [ 1234567890.000000, 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
-                 [ 1234567890.100000, 1, 2, 3, 4, 5, 6, 7, 8, 9 ] ]
-        with assert_raises(FormatterError) as e:
-            formatter.format(data)
-        in_("error", str(e.exception))
-
-        # just right
-        formatter = Formatter(name_prep)
-        data = [ [ 1234567890.000000, 1.1, 2.2, 3.3, 4.4, 5.5, 6.6, 7.7, 8.8 ],
-                 [ 1234567890.100000, 1.1, 2.2, 3.3, 4.4, 5.5, 6.6, 7.7, 8.8 ] ]
-        text = formatter.format(data)
-        eq_(text,
-            "1234567890.000000 1.100000 2.200000 3.300000 4.400000 " +
-            "5.500000 6.600000 7.700000 8.800000\n" +
-            "1234567890.100000 1.100000 2.200000 3.300000 4.400000 " +
-            "5.500000 6.600000 7.700000 8.800000\n")
-
-        # try RawData too
-        formatter = Formatter(name_raw)
-        data = [ [ 1234567890.000000, 1, 2, 3, 4, 5, 6 ],
-                 [ 1234567890.100000, 1, 2, 3, 4, 5, 6 ] ]
-        text = formatter.format(data)
-        eq_(text,
-            "1234567890.000000 1 2 3 4 5 6\n" +
-            "1234567890.100000 1 2 3 4 5 6\n")
-
-        # pass an instantiated class
-        formatter = Formatter(get_named(name_rawnotch))
-        data = [ [ 1234567890.000000, 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
-                 [ 1234567890.100000, 1, 2, 3, 4, 5, 6, 7, 8, 9 ] ]
-        text = formatter.format(data)
-        eq_(text,
-            "1234567890.000000 1 2 3 4 5 6 7 8 9\n" +
-            "1234567890.100000 1 2 3 4 5 6 7 8 9\n")
-
-        # Empty data should work but is useless
-        formatter = Formatter(name_raw)
-        data = []
-        text = formatter.format(data)
-        eq_(text, "")
-
-    def test_roundtrip(self):
-        self.real_t_roundtrip("PrepData", "RawData", "RawNotchedData")
-        self.real_t_roundtrip("float32_8", "uint16_6", "uint16_9")
-    def real_t_roundtrip(self, name_prep, name_raw, name_rawnotch):
-        # Verify that textual data passed into the Parser, and then
-        # back through the Formatter, then back into the Parser,
-        # gives identical parsed representations
-        random.seed(12345)
-
-        def do_roundtrip(layout, datagen):
-            for i in range(100):
-                rows = random.randint(1,100)
-                data = ""
-                ts = 1234567890
-                for r in range(rows):
-                    ts += random.uniform(0,1)
-                    row = sprintf("%f", ts) + " "
-                    row += " ".join(datagen())
-                    row += "\n"
-                    data += row
-                parser1 = Parser(layout)
-                formatter = Formatter(layout)
-                parser2 = Parser(layout)
-                parser1.parse(data)
-                parser2.parse(formatter.format(parser1.data))
-                eq_(parser1.data, parser2.data)
-
-        def datagen():
-            return [ sprintf("%f", random.uniform(-1000,1000))
-                     for x in range(8) ]
-        do_roundtrip(name_prep, datagen)
-
-        def datagen():
-            return [ sprintf("%d", random.randint(0,65535))
-                     for x in range(6) ]
-        do_roundtrip(name_raw, datagen)
-
-        def datagen():
-            return [ sprintf("%d", random.randint(0,65535))
-                     for x in range(9) ]
-        do_roundtrip(name_rawnotch, datagen)
-
-class TestLayoutSpeed:
-    @unittest.skip("this is slow")
-    def test_layout_speed(self):
-        import time
-
-        random.seed(54321)
-
-        def do_speedtest(layout, datagen, rows = 5000, times = 100):
-            # Build data once
-            data = ""
-            ts = 1234567890
-            for r in range(rows):
-                ts += random.uniform(0,1)
-                row = sprintf("%f", ts) + " "
-                row += " ".join(datagen())
-                row += "\n"
-                data += row
-
-            # Do lots of roundtrips
-            start = time.time()
-            for i in range(times):
-                parser = Parser(layout)
-                formatter = Formatter(layout)
-                parser.parse(data)
-                formatter.format(parser.data)
-            elapsed = time.time() - start
-            printf("roundtrip %s: %d ms, %.1f μs/row, %d rows/sec\n",
-                   layout,
-                   elapsed * 1e3,
-                   (elapsed * 1e6) / (rows * times),
-                   (rows * times) / elapsed)
-
-        print ""
-        def datagen():
-            return [ sprintf("%f", random.uniform(-1000,1000))
-                     for x in range(10) ]
-        do_speedtest("float32_10", datagen)
-
-        def datagen():
-            return [ sprintf("%d", random.randint(0,65535))
-                     for x in range(10) ]
-        do_speedtest("uint16_10", datagen)
-
-        def datagen():
-            return [ sprintf("%d", random.randint(0,65535))
-                     for x in range(6) ]
-        do_speedtest("uint16_6", datagen)

tests/test_nilmdb.py

@@ -1,4 +1,4 @@
-import nilmdb
+import nilmdb.server
 
 from nose.tools import *
 from nose.tools import assert_raises
@@ -29,11 +29,11 @@ class Test00Nilmdb(object):  # named 00 so it runs first
         recursive_unlink(testdb)
 
         with assert_raises(IOError):
-            nilmdb.NilmDB("/nonexistant-db/foo")
+            nilmdb.server.NilmDB("/nonexistant-db/foo")
 
-        db = nilmdb.NilmDB(testdb)
+        db = nilmdb.server.NilmDB(testdb)
         db.close()
-        db = nilmdb.NilmDB(testdb, sync=False)
+        db = nilmdb.server.NilmDB(testdb)
         db.close()
 
         # test timer, just to get coverage
@@ -46,29 +46,29 @@ class Test00Nilmdb(object):  # named 00 so it runs first
         in_("test: ", capture.getvalue())
 
     def test_stream(self):
-        db = nilmdb.NilmDB(testdb, sync=False)
+        db = nilmdb.server.NilmDB(testdb)
         eq_(db.stream_list(), [])
 
         # Bad path
         with assert_raises(ValueError):
-            db.stream_create("foo/bar/baz", "PrepData")
+            db.stream_create("foo/bar/baz", "float32_8")
         with assert_raises(ValueError):
-            db.stream_create("/foo", "PrepData")
+            db.stream_create("/foo", "float32_8")
         # Bad layout type
         with assert_raises(ValueError):
             db.stream_create("/newton/prep", "NoSuchLayout")
-        db.stream_create("/newton/prep", "PrepData")
+        db.stream_create("/newton/prep", "float32_8")
-        db.stream_create("/newton/raw", "RawData")
+        db.stream_create("/newton/raw", "uint16_6")
-        db.stream_create("/newton/zzz/rawnotch", "RawNotchedData")
+        db.stream_create("/newton/zzz/rawnotch", "uint16_9")
 
         # Verify we got 3 streams
-        eq_(db.stream_list(), [ ["/newton/prep", "PrepData"],
+        eq_(db.stream_list(), [ ["/newton/prep", "float32_8"],
-                                ["/newton/raw", "RawData"],
+                                ["/newton/raw", "uint16_6"],
-                                ["/newton/zzz/rawnotch", "RawNotchedData"]
+                                ["/newton/zzz/rawnotch", "uint16_9"]
                                 ])
         # Match just one type or one path
-        eq_(db.stream_list(layout="RawData"), [ ["/newton/raw", "RawData"] ])
+        eq_(db.stream_list(layout="uint16_6"), [ ["/newton/raw", "uint16_6"] ])
-        eq_(db.stream_list(path="/newton/raw"), [ ["/newton/raw", "RawData"] ])
+        eq_(db.stream_list(path="/newton/raw"), [ ["/newton/raw", "uint16_6"] ])
 
         # Verify that columns were made right (pytables specific)
         if "h5file" in db.data.__dict__:
@@ -104,7 +104,7 @@ class Test00Nilmdb(object):  # named 00 so it runs first
 
 class TestBlockingServer(object):
     def setUp(self):
-        self.db = serializer_proxy(nilmdb.NilmDB)(testdb, sync=False)
+        self.db = serializer_proxy(nilmdb.server.NilmDB)(testdb)
 
     def tearDown(self):
         self.db.close()
@@ -113,11 +113,11 @@ class TestBlockingServer(object):
         # Server should fail if the database doesn't have a "_thread_safe"
         # property.
         with assert_raises(KeyError):
-            nilmdb.Server(object())
+            nilmdb.server.Server(object())
 
         # Start web app on a custom port
-        self.server = nilmdb.Server(self.db, host = "127.0.0.1",
+        self.server = nilmdb.server.Server(self.db, host = "127.0.0.1",
-                                    port = 32180, stoppable = True)
+                                           port = 32180, stoppable = True)
 
         # Run it
         event = threading.Event()
@@ -145,9 +145,9 @@ class TestServer(object):
 
     def setUp(self):
         # Start web app on a custom port
-        self.db = serializer_proxy(nilmdb.NilmDB)(testdb, sync=False)
+        self.db = serializer_proxy(nilmdb.server.NilmDB)(testdb)
-        self.server = nilmdb.Server(self.db, host = "127.0.0.1",
+        self.server = nilmdb.server.Server(self.db, host = "127.0.0.1",
-                                    port = 32180, stoppable = False)
+                                           port = 32180, stoppable = False)
         self.server.start(blocking = False)
 
     def tearDown(self):
@@ -171,13 +171,13 @@ class TestServer(object):
         streams = getjson("/stream/list")
 
         eq_(streams, [
-            ['/newton/prep', 'PrepData'],
+            ['/newton/prep', 'float32_8'],
-            ['/newton/raw', 'RawData'],
+            ['/newton/raw', 'uint16_6'],
-            ['/newton/zzz/rawnotch', 'RawNotchedData'],
+            ['/newton/zzz/rawnotch', 'uint16_9'],
             ])
 
-        streams = getjson("/stream/list?layout=RawData")
+        streams = getjson("/stream/list?layout=uint16_6")
-        eq_(streams, [['/newton/raw', 'RawData']])
+        eq_(streams, [['/newton/raw', 'uint16_6']])
 
         streams = getjson("/stream/list?layout=NoSuchLayout")
         eq_(streams, [])
@@ -237,3 +237,20 @@ class TestServer(object):
                                  "header in response:\n", r.headers)
         eq_(r.headers["access-control-allow-methods"], "GET, HEAD")
         eq_(r.headers["access-control-allow-headers"], "X-Custom")
+
+    def test_post_bodies(self):
+        # Test JSON post bodies
+        r = requests.post("http://127.0.0.1:32180/stream/set_metadata",
+                          headers = { "Content-Type": "application/json" },
+                          data = '{"hello": 1}')
+        eq_(r.status_code, 404) # wrong parameters
+
+        r = requests.post("http://127.0.0.1:32180/stream/set_metadata",
+                          headers = { "Content-Type": "application/json" },
+                          data = '["hello"]')
+        eq_(r.status_code, 415) # not a dict
+
+        r = requests.post("http://127.0.0.1:32180/stream/set_metadata",
+                          headers = { "Content-Type": "application/json" },
+                          data = '[hello]')
+        eq_(r.status_code, 400) # badly formatted JSON

tests/test_timestamper.py

@@ -1,6 +1,5 @@
 import nilmdb
 from nilmdb.utils.printf import *
-from nilmdb.utils import datetime_tz
 
 from nose.tools import *
 from nose.tools import assert_raises
@@ -20,11 +19,11 @@ class TestTimestamper(object):
         def join(list):
             return "\n".join(list) + "\n"
 
-        start = datetime_tz.datetime_tz.smartparse("03/24/2012").totimestamp()
+        start = nilmdb.utils.time.parse_time("03/24/2012")
         lines_in  = [ "hello", "world", "hello world", "# commented out" ]
-        lines_out = [ "1332561600.000000 hello",
+        lines_out = [ "1332561600000000 hello",
-                      "1332561600.000125 world",
+                      "1332561600000125 world",
-                      "1332561600.000250 hello world" ]
+                      "1332561600000250 hello world" ]
 
         # full
         input = cStringIO.StringIO(join(lines_in))
@@ -42,7 +41,7 @@ class TestTimestamper(object):
         # stop iteration early
         input = cStringIO.StringIO(join(lines_in))
         ts = timestamper.TimestamperRate(input, start, 8000,
-                                                1332561600.000200)
+                                                1332561600000200)
         foo = ""
         for line in ts:
             foo += line
@@ -51,14 +50,14 @@ class TestTimestamper(object):
         # stop iteration early (readlines)
         input = cStringIO.StringIO(join(lines_in))
         ts = timestamper.TimestamperRate(input, start, 8000,
-                                                1332561600.000200)
+                                                1332561600000200)
         foo = ts.readlines()
         eq_(foo, join(lines_out[0:2]))
 
         # stop iteration really early
         input = cStringIO.StringIO(join(lines_in))
         ts = timestamper.TimestamperRate(input, start, 8000,
-                                                1332561600.000000)
+                                                1332561600000000)
         foo = ts.readlines()
         eq_(foo, "")
 
@@ -83,10 +82,3 @@ class TestTimestamper(object):
         for line in ts:
             raise AssertionError
         ts.close()
-
-        # Test the null timestamper
-        input = cStringIO.StringIO(join(lines_out))  # note: lines_out
-        ts = timestamper.TimestamperNull(input)
-        foo = ts.readlines()
-        eq_(foo, join(lines_out))
-        eq_(str(ts), "TimestamperNull(...)")

tests/testutil/helpers.py

@@ -20,6 +20,11 @@ def in_(a, b):
     if a not in b:
         raise AssertionError("%s not in %s" % (myrepr(a), myrepr(b)))
 
+def in2_(a1, a2, b):
+    if a1 not in b and a2 not in b:
+        raise AssertionError("(%s or %s) not in %s" % (myrepr(a1), myrepr(a2),
+                                                       myrepr(b)))
+
 def ne_(a, b):
     if not a != b:
         raise AssertionError("unexpected %s == %s" % (myrepr(a), myrepr(b)))