Make StreamInserter.insert complain if data remains after send

Previously, we ignored problems when sending intermediate blocks,
since getting more data might make the next attempt succeed.
But in practice, malformed data would just build up, causing
problems.  Raise an exception if there's too much data remaining
after trying to send an intermediate block.

.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

@@ -266,3 +266,65 @@ 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.

nilmdb/__init__.py

@@ -1,7 +1,9 @@
 """Main NilmDB import"""
 
-from nilmdb.server import NilmDB, Server
-from nilmdb.client import Client
+# These aren't imported automatically, because loading the server
+# 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

@@ -2,17 +2,15 @@
 
 """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):
-    """Use repr to maintain full precision in the string output."""
-    return repr(float(f))
+from nilmdb.utils.time import float_time_to_string
 
 def extract_timestamp(line):
     """Extract just the timestamp from a line of data text"""
@@ -21,8 +19,12 @@ def extract_timestamp(line):
 class Client(object):
     """Main client interface to the Nilm database."""
 
-    def __init__(self, url):
-        self.http = nilmdb.client.httpclient.HTTPClient(url)
+    def __init__(self, url, post_json = False):
+        """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:
-            params["extent"] = 1
+        if extended:
+            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)
 
@@ -102,9 +107,9 @@ class Client(object):
             "path": path
         }
         if start is not None:
-            params["start"] = float_to_string(start)
+            params["start"] = float_time_to_string(start)
         if end is not None:
-            params["end"] = float_to_string(end)
+            params["end"] = float_time_to_string(end)
         return self.http.post("stream/remove", params)
 
     @contextlib.contextmanager
@@ -117,47 +122,47 @@ 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_line('1234567891.0 1 2 3 4\\n')
+            ctx.insert('1234567890.0 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
-        iterable object that provides ASCII data that matches the
-        database layout for path.  See stream_insert_context for
-        details on the 'start' and 'end' parameters."""
+        """Insert rows of data into a stream.  data should be a string
+        or iterable that provides ASCII data that matches the database
+        layout for path.  See stream_insert_context for details on the
+        '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):
-        """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):
+    def stream_intervals(self, path, start = None, end = None, diffpath = 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"] = float_time_to_string(start)
         if end is not None:
-            params["end"] = float_to_string(end)
+            params["end"] = float_time_to_string(end)
         return self.http.get_gen("stream/intervals", params)
 
     def stream_extract(self, path, start = None, end = None, count = False):
@@ -173,9 +178,9 @@ class Client(object):
             "path": path,
         }
         if start is not None:
-            params["start"] = float_to_string(start)
+            params["start"] = float_time_to_string(start)
         if end is not None:
-            params["end"] = float_to_string(end)
+            params["end"] = float_time_to_string(end)
         if count:
             params["count"] = 1
         return self.http.get_gen("stream/extract", params)
@@ -195,8 +200,10 @@ 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 +216,9 @@ 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 +227,21 @@ class StreamInserter(object):
     to change the end time for the interval.
     """
 
-    # See design.md for a discussion of how much data to send.
-    # These are soft limits -- actual data might be rounded up.
-    # We send when we have a certain amount of data queued, or
-    # when a certain amount of time has passed since the last send.
+    # See design.md for a discussion of how much data to send.  This
+    # is a soft limit -- we might send up to twice as much or so
     _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
     _end_epsilon = 1e-6
 
-    def __init__(self, client, path, start = None, end = None):
+    def __init__(self, http, 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 +249,37 @@ 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
-        self._last_time = time.time()
+    def insert(self, data):
+        """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.
-        # Only the older one actually gets processed; the newer one
-        # is used to "look-ahead" to the next timestamp if we need
-        # to internally split an insertion into two requests.
-        self._line_old = None
-        self._line_new = None
-
-    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:
+        if length > maxdata:
+            # This could make our buffer more than twice what we
+            # wanted to send, so split it up.  This is a bit
+            # inefficient, but the user really shouldn't be providing
+            # this much data at once.
+            for cut in range(0, length, maxdata):
+                self.insert(data[cut:(cut + maxdata)])
             return
 
-        # If starting a new block, pull out the timestamp if needed.
-        if self._block_start is None:
-            if self._interval_start is not None:
-                # 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)
+        # Append this string to our list
+        self._block_data.append(data)
+        self._block_len += length
 
-        # Save the line
-        self._block_data.append(self._line_old)
-        self._block_len += len(self._line_old)
-
-        if allow_intermediate:
-            # Send an intermediate block to the server if needed.
-            elapsed = time.time() - self._last_time
-            if (self._block_len > self._max_data) or (elapsed > self._max_time):
-                self._send_block_intermediate()
+        # Send the block once we have enough data
+        if self._block_len >= maxdata:
+            self._send_block(final = False)
+            if self._block_len >= self._max_data_after_send: # pragma: no cover
+                raise ValueError("too much data left over after trying"
+                                 " to send intermediate block; is it"
+                                 " missing newlines or malformed?")
 
     def update_start(self, start):
         """Update the start time for the next contiguous interval.
@@ -318,63 +302,111 @@ 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.insert_line(None, allow_intermediate = False)
+        self._send_block(final = True)
 
-        if self._block_len > 0:
-            # We have data pending, so send the final block
-            self._send_block_final()
-        elif None not in (self._interval_start, self._interval_end):
-            # We have no data, but enough information to create an
-            # empty interval.
-            self._block_start = self._interval_start
+    def _get_first_noncomment(self, block):
+        """Return the (start, end) indices of the first full line in
+        block that isn't a comment, or raise IndexError if
+        there isn't one."""
+        start = 0
+        while True:
+            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 += self._end_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
-            block_end = extract_timestamp(self._line_old) + self._end_epsilon
-        self._send_block(block_end)
+            # An intermediate block, e.g. "line1\nline2\nline3\nline4"
+            # We need to save "line3\nline4" for the next block, and
+            # 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):
-        """Send current block to the server"""
-        self.last_response = self._client.stream_insert_block(
-            self._path, "".join(self._block_data),
-            self._block_start, block_end)
+            # Next block continues where this one ended
+            self._interval_start = end_ts
 
-        # Clear out the block
-        self._block_data = []
-        self._block_len = 0
-        self._block_start = None
+        # Double check endpoints
+        if start_ts is None or end_ts is None:
+            # If the block has no non-comment lines, it's OK
+            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
-        self._last_time = time.time()
+        # Send it
+        params = { "path": self._path,
+                   "start": float_time_to_string(start_ts),
+                   "end": float_time_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)
-        for line in response.iter_lines():
-            if isjson:
+        (response, isjson) = self._do_req(method, url, query, body,
+                                          stream = True, headers = headers)
+        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
@@ -13,7 +14,8 @@ from argparse import ArgumentDefaultsHelpFormatter as def_form
 # 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" ]
 
 # Import the subcommand modules
 subcmd_mods = {}
@@ -84,7 +86,7 @@ class Cmdline(object):
         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

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

nilmdb/cmdline/extract.py

@@ -44,7 +44,7 @@ def cmd_extract(self):
     layout = streams[0][1]
 
     if self.args.timestamp_raw:
-        time_string = repr
+        time_string = nilmdb.utils.time.float_time_to_string
     else:
         time_string = nilmdb.utils.time.format_time
 

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 +10,118 @@ 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
-                                   input date, use --none.  Otherwise,
-                                   provide --start, or use --filename to
-                                   try to deduce timestamps from the file.
-
-                                   Set the TZ environment variable to change
-                                   the default timezone.
+                                   To add timestamps, specify the
+                                   arguments --timestamp and --rate,
+                                   and provide a starting time.
                                    """)
 
+    group.add_argument("-t", "--timestamp", action="store_true",
+                       help="Add timestamps to each line")
     group.add_argument("-r", "--rate", type=float,
-                       help="""
-                       If needed, rate in Hz (required when using --start)
-                       """)
+                       help="Data rate, in Hz")
+
+    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)")
     exc.add_argument("-f", "--filename", action="store_true",
-                     help="""
-                     Use filenames to determine start time
-                     (default, if filenames are provided)
-                     """)
-    exc.add_argument("-n", "--none", action="store_true",
-                     help="Timestamp is already present, don't add one")
+                     help="Use filename to determine start time")
+
+    group = cmd.add_argument_group("End time",
+                                   description="""
+                                   End time for the overall stream.
+                                   (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)")
 
     group = cmd.add_argument_group("Required parameters")
     group.add_argument("path",
                        help="Path of stream, e.g. /foo/bar")
-    group.add_argument("file", nargs="*", default=['-'],
-                       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:
-        self.die("error: --start can only be used with one input file")
+    arg = self.args
 
-    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 self.args.none:
-            ts = timestamper.TimestamperNull(infile)
+        if arg.start is None:
+            try:
+                arg.start = nilmdb.utils.time.parse_time(filename).totimestamp()
+            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:
-                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)
+            data = iter(lambda: infile.read(1048576), '')
 
         # Print info
-        if not self.args.quiet:
-            printf("Input file: %s\n", filename)
-            printf("Timestamper: %s\n", str(ts))
+        if not arg.quiet:
+            printf(" Input file: %s\n", filename)
+            printf(" Start time: %s\n",
+                   nilmdb.utils.time.format_time(arg.start))
+            if arg.end:
+                printf("   End time: %s\n",
+                       nilmdb.utils.time.format_time(arg.end))
+            if arg.timestamp:
+                printf("Timestamper: %s\n", str(data))
 
         # Insert the data
-        try:
-            self.client.stream_insert(self.args.path, ts)
-        except nilmdb.client.Error as e:
-            # TODO: It would be nice to be able to offer better errors
-            # here, particularly in the case of overlap, which just shows
-            # ugly bracketed ranges of 16-digit numbers and a mangled URL.
-            # Need to consider adding something like e.prettyprint()
-            # that is smarter about the contents of the error.
-            self.die("error inserting data: %s", str(e))
+        self.client.stream_insert(arg.path, data, arg.start, arg.end)
+
+    except nilmdb.client.Error as e:
+        # TODO: It would be nice to be able to offer better errors
+        # here, particularly in the case of overlap, which just shows
+        # ugly bracketed ranges of 16-digit numbers and a mangled URL.
+        # Need to consider adding something like e.prettyprint()
+        # that is smarter about the contents of the error.
+        self.die("error inserting data: %s", str(e))
 
     return

nilmdb/cmdline/intervals.py

@@ -0,0 +1,62 @@
+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")
+    group.add_argument("-d", "--diff", metavar="PATH",
+                       help="Subtract intervals from this 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)")
+    group.add_argument("-e", "--end",
+                       metavar="TIME", type=self.arg_time,
+                       help="Ending timestamp for intervals "
+                       "(free-form, noninclusive)")
+
+    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.float_time_to_string
+    else:
+        time_string = nilmdb.utils.time.format_time
+
+    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

@@ -24,23 +24,26 @@ def setup(self, sub):
     group.add_argument("-l", "--layout", default="*",
                        help="Match only this stream layout")
 
-    group = cmd.add_argument_group("Interval extent")
-    group.add_argument("-E", "--extent", action="store_true",
-                       help="Show min/max timestamps in this stream")
+    group = cmd.add_argument_group("Interval info")
+    group.add_argument("-E", "--ext", action="store_true",
+                       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)")
     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)")
 
     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 +68,29 @@ 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.float_time_to_string
     else:
         time_string = nilmdb.utils.time.format_time
 
-    for (path, layout, extent_min, extent_max) in streams:
+    for stream in streams:
+        (path, layout, int_min, int_max, rows, seconds) = 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 extent_min is None or extent_max is None:
-                printf("  extent: (no data)\n")
+        if self.args.ext:
+            if int_min is None or int_max is None:
+                printf("  interval extents: (no data)\n")
             else:
-                printf("  extent: %s -> %s\n",
-                       time_string(extent_min), time_string(extent_max))
+                printf("  interval extents: %s -> %s\n",
+                       time_string(int_min), time_string(int_max))
+            printf("        total data: %d rows, %.6f seconds\n",
+                   rows or 0, seconds or 0);
 
         if self.args.detail:
             printed = False

nilmdb/cmdline/remove.py

@@ -1,5 +1,4 @@
 from nilmdb.utils.printf import *
-import nilmdb
 import nilmdb.client
 
 def setup(self, sub):

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 '
-                       'commits for sqlite transactions',
+    group.add_argument('-t', '--traceback',
+                       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,
-                                                      sync = not args.nosync)
+    db = nilmdb.utils.serializer_proxy(nilmdb.server.NilmDB)(args.database)
 
     # Configure the server
     if args.quiet:
@@ -49,10 +48,12 @@ 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:
+        print "Version: %s" % nilmdb.__version__
         print "Database: %s" % (os.path.realpath(args.database))
         if args.address == '0.0.0.0' or args.address == '::':
             host = socket.getfqdn()

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 float_time_to_string as ftts
+import nilmdb.utils
 
 import os
 import cPickle as pickle
-import struct
-import mmap
 import re
+import sys
 
-# If we have the faulthandler module, use it.  All of the mmap stuff
-# 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
+#from . import pyrocket as rocket
+from . import rocket
 
 # Up to 256 open file descriptors at any given time.
 # These variables are global so they can be used in the decorator arguments.
@@ -83,26 +76,6 @@ class BulkData(object):
             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)
@@ -122,11 +95,20 @@ class BulkData(object):
             raise ValueError("subdirs of this path already exist")
         os.mkdir(ospath)
 
-        # Write format string to file
-        Table.create(ospath, struct_fmt, self.file_size, self.files_per_dir)
+        try:
+            # Write format string to file
+            Table.create(ospath, layout_name, self.file_size,
+                         self.files_per_dir)
 
-        # Open and cache it
-        self.getnode(unicodepath)
+            # Open and cache it
+            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
@@ -171,64 +153,6 @@ 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:
-            for i in xrange(count):
-                row = dataiter.next()
-                self._f.write(packer(*row))
-        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)."""
@@ -241,19 +165,20 @@ class Table(object):
         return os.path.isfile(os.path.join(root, "_format"))
 
     @classmethod
-    def create(cls, root, struct_fmt, file_size, files_per_dir):
-        """Initialize a table at the given OS path.
-        'struct_fmt' is a Struct module format description"""
+    def create(cls, root, layout, file_size, files_per_dir):
+        """Initialize a table at the given OS path with the
+        given layout string"""
 
         # Calculate rows per file so that each file is approximately
         # file_size bytes.
-        packer = struct.Struct(struct_fmt)
-        rows_per_file = max(file_size // packer.size, 1)
+        rkt = rocket.Rocket(layout, None)
+        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,
-                "version": 1 }
+                "layout": layout,
+                "version": 2 }
         with open(os.path.join(root, "_format"), "wb") as f:
             pickle.dump(fmt, f, 2)
 
@@ -262,18 +187,35 @@ 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)
-            raise NotImplementedError("version " + fmt["version"] +
+        if fmt["version"] == 1: # pragma: no cover
+            # We can handle this old version by converting from
+            # struct_fmt back to layout name.
+            compat = { "<dHHHHHH": "uint16_6",
+                       "<dHHHHHHHHH": "uint16_9",
+                       "<dffffffff": "float32_8" }
+            if fmt["struct_fmt"] in compat:
+                fmt["version"] = 2
+                fmt["layout"] = compat[fmt["struct_fmt"]]
+            else:
+                raise NotImplementedError("old version 1 data with format "
+                                          + fmt["struct_fmt"] + " is no good")
+        elif fmt["version"] != 2: # pragma: no cover (just future proofing)
+            raise NotImplementedError("version " + str(fmt["version"]) +
                                       " bulk data store 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.file_size = self.packer.size * self.rows_per_file
+        self.layout = fmt["layout"]
+
+        # 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()
@@ -328,26 +270,53 @@ 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):
         """Append the data and flush it to disk.
@@ -363,10 +332,111 @@ class Table(object):
             f = self.file_open(subdir, fname)
 
             # Write the data
-            f.append_pack_iter(count, self.packer.pack, dataiter)
+            written = f.append_iter(count, dataiter)
+            if written != count: # pragma: no cover
+                raise Exception("Didn't write the expected number of rows: "
+                                + str(written) + " != " + str(count))
             remaining -= count
             self.nrows += count
 
+    def append_string(self, data, start, end):
+        """Parse the formatted string in 'data', according to the
+        current layout, and append it to the table.  If any timestamps
+        are non-monotonic, or don't fall between 'start' and 'end',
+        a ValueError is raised.
+
+        If this function succeeds, it returns normally.  Otherwise,
+        the table is reverted back to its original state by truncating
+        or deleting files as necessary."""
+        data_offset = 0
+        last_timestamp = -1e12
+        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",
+                                          ftts(obj), ftts(start))
+                        else:
+                            err = sprintf("Data timestamp %s >= end time %s",
+                                          ftts(obj), ftts(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, as_string):
+        """Extract data corresponding to Python range [n:m],
+        and returns a numeric list or formatted string,
+        depending on as_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)
+            if as_string:
+                ret.append(f.extract_string(offset, count))
+            else:
+                ret.extend(f.extract_list(offset, count))
+            remaining -= count
+            row += count
+        if as_string:
+            return "".join(ret)
+        return ret
+
+    def get_as_text(self, start, stop):
+        """Extract data corresponding to Python range [n:m],
+        and returns a formatted string"""
+        return self._get_data(start, stop, True)
+
     def __getitem__(self, key):
         """Extract data and return it.  Supports simple indexing
         (table[n]) and range slices (table[n:m]).  Returns a nested
@@ -375,41 +445,32 @@ class Table(object):
         # 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):
+            try:
+                if (key.step is not None and key.step != 1):
+                    raise IndexError
+                return self._get_data(key.start, key.stop, False)
+            except IndexError:
                 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
+        # Handle single points (inefficiently!)
         if key < 0 or key >= self.nrows:
             raise IndexError("Index out of range")
         (subdir, filename, offset, count) = self._offset_from_row(key)
-        mm = self.file_open(subdir, filename).mmap
-        # unpack_from ignores the mmap object's current seek position
-        return list(self.packer.unpack_from(mm, offset))
+        f = self.file_open(subdir, filename)
+        return f.extract_list(offset, 1)[0]
 
     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."""
-        # Import an existing list of deleted rows for this file
+        file, and potentially remove or truncate the file itself."""
+        # 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:
@@ -449,20 +510,19 @@ 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)
-
-            # Try deleting subdir, too
-            try:
-                os.rmdir(os.path.join(self.root, subdir))
-            except:
-                pass
+            self._remove_or_truncate_file(subdir, filename, 0)
         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))
@@ -483,7 +543,7 @@ 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

nilmdb/server/interval.pyx

@@ -19,6 +19,10 @@ 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.
 
+from ..utils.time import float_time_to_string as ftts
+from ..utils.iterator import imerge
+import itertools
+
 cimport rbtree
 cdef extern from "stdint.h":
     ctypedef unsigned long long uint64_t
@@ -47,7 +51,7 @@ cdef class Interval:
         return self.__class__.__name__ + "(" + s + ")"
 
     def __str__(self):
-        return "[" + repr(self.start) + " -> " + repr(self.end) + ")"
+        return "[" + ftts(self.start) + " -> " + ftts(self.end) + ")"
 
     def __cmp__(self, Interval other):
         """Compare two intervals.  If non-equal, order by start then end"""
@@ -262,21 +266,15 @@ 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()
-
-        if not isinstance(other, IntervalSet):
-            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))
-
+        for i in self.intersection(other):
+            out.tree.insert(rbtree.RBNode(i.start, i.end, i))
         return out
 
     def intersection(self, Interval interval not None, orig = False):
@@ -311,6 +309,62 @@ cdef class IntervalSet:
                     else:
                         yield subset
 
+    def set_difference(self, IntervalSet other not None,
+                       Interval bounds = None):
+        """
+        Compute the difference (self \\ other) between this
+        IntervalSet and the given IntervalSet; i.e., the ranges
+        that are present in 'self' but not 'other'.
+
+        If 'bounds' is not None, results are limited to the range
+        specified by the interval 'bounds'.
+
+        Returns a generator that yields each interval in turn.
+        Output intervals are built as subsets of the intervals in the
+        first argument (self).
+        """
+        # 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
+        if bounds is None:
+            bounds = Interval(-1e12, 1e12)
+        self_iter = decorate(self.intersection(bounds), 0, 2)
+        other_iter = decorate(other.intersection(bounds), 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.
+        self_interval = None
+        other_interval = None
+        out_start = None
+        for (ts, k, i) in imerge(self_iter, other_iter):
+            if k == 0:
+                # start self interval
+                self_interval = i
+                if other_interval is None:
+                    out_start = ts
+            elif k == 1:
+                # start other interval
+                other_interval = i
+                if out_start is not None and out_start != ts:
+                    yield self_interval.subset(out_start, ts)
+                out_start = None
+            elif k == 2:
+                # end self interval
+                if out_start is not None and out_start != ts:
+                    yield self_interval.subset(out_start, ts)
+                out_start = None
+                self_interval = None
+            elif k == 3:
+                # end other interval
+                other_interval = None
+                if self_interval:
+                    out_start = ts
+
     cpdef intersects(self, Interval other):
         """Return True if this IntervalSet intersects another interval"""
         for n in self.tree.intersect(other.start, other.end):

nilmdb/server/layout.pyx

@@ -43,9 +43,13 @@ class Layout:
             self.parse = self.parse_uint16
             self.format_str = "%.6f" + " %d" * self.count
             self.format = self.format_generic
-        elif datatype == 'float32' or datatype == 'float64':
+        elif datatype == 'float32':
             self.parse = self.parse_float64
-            self.format_str = "%.6f" + " %f" * self.count
+            self.format_str = "%.6f" + " %.6e" * self.count
+            self.format = self.format_generic
+        elif datatype == 'float64':
+            self.parse = self.parse_float64
+            self.format_str = "%.6f" + " %.16e" * self.count
             self.format = self.format_generic
         else:
             raise KeyError("invalid type")

nilmdb/server/nilmdb.py

@@ -10,7 +10,7 @@ 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)
@@ -31,11 +31,9 @@ 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,
-# the sync=False option to NilmDB.__init__ will set PRAGMA synchronous=OFF.
-
-
-# Don't touch old entries -- just add new ones.
+# To speed things up, we can set 'PRAGMA synchronous=OFF'.  Or, it
+# seems that 'PRAGMA synchronous=NORMAL' and 'PRAGMA journal_mode=WAL'
+# give an equivalent speedup more safely.  That is what is used here.
 _sql_schema_updates = {
     0: """
     -- All streams
@@ -77,7 +75,7 @@ _sql_schema_updates = {
 class NilmDB(object):
     verbose = 0
 
-    def __init__(self, basepath, sync=True, max_results=None,
+    def __init__(self, basepath, max_results=None,
                  bulkdata_args=None):
         if bulkdata_args is None:
             bulkdata_args = {}
@@ -101,10 +99,8 @@ class NilmDB(object):
         self._sql_schema_update()
 
         # See big comment at top about the performance implications of this
-        if sync:
-            self.con.execute("PRAGMA synchronous=FULL")
-        else:
-            self.con.execute("PRAGMA synchronous=OFF")
+        self.con.execute("PRAGMA synchronous=NORMAL")
+        self.con.execute("PRAGMA journal_mode=WAL")
 
         # Approximate largest number of elements that we want to send
         # in a single reply (for stream_intervals, stream_extract)
@@ -269,7 +265,7 @@ 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 +274,26 @@ 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
-        path, layout, and min/max extent of the data:
-        [ path, layout, extent_min, extent_max ]
+        If extended = True, returns a list of lists containing
+        more information:
+           path
+           layout
+           interval_min (earliest interval start)
+           interval_max (latest interval end)
+           rows         (total number of rows of data)
+           seconds      (total time covered by this stream)
         """
         params = ()
         query = "SELECT streams.path, streams.layout"
-        if extent:
-            query += ", min(ranges.start_time), max(ranges.end_time)"
+        if extended:
+            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:
@@ -303,8 +306,13 @@ 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 'path2'.
+
         Returns (intervals, restart) tuple.
 
         intervals is a list of [start,end] timestamps of all intervals
@@ -318,10 +326,17 @@ class NilmDB(object):
         """
         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 = intervals.set_difference(diffintervals, requested)
+        else:
+            getter = intervals.intersection(requested)
+        for n, i in enumerate(getter):
             if n >= self.max_results:
                 restart = i.start
                 break
@@ -412,8 +427,7 @@ 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
-                 method.  E.g. nilmdb.layout.Parser.data
+           data: Textual data, formatted according to the layout of path
            """
         # First check for basic overlap using timestamp info given.
         stream_id = self._stream_id(path)
@@ -423,10 +437,11 @@ 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.
@@ -473,9 +488,8 @@ class NilmDB(object):
         """
         Returns (data, restart) tuple.
 
-        data is a list of raw data from the database, suitable for
-        passing to e.g. nilmdb.layout.Formatter to translate into
-        textual form.
+        data is ASCII-formatted data from the database, formatted
+        according to the layout of the stream.
 
         restart, if nonzero, means that there were too many results to
         return in a single request.  The data is complete from the
@@ -516,7 +530,7 @@ class NilmDB(object):
                 restart = table[row_max][0]
 
             # Gather these results up
-            result.extend(table[row_start:row_end])
+            result.append(table.get_as_text(row_start, row_end))
 
             # Count them
             remaining -= row_end - row_start
@@ -526,7 +540,7 @@ class NilmDB(object):
 
         if count:
             return matched
-        return (result, restart)
+        return ("".join(result), restart)
 
     def stream_remove(self, path, start = None, end = None):
         """

nilmdb/server/pyrocket.py

@@ -0,0 +1,143 @@
+# Python implementation of the "rocket" data parsing interface.
+# This interface translates between the binary format on disk
+# and the ASCII format used when communicating with clients.
+
+# This is slow!  Use the C version instead.
+
+from __future__ import absolute_import
+import struct
+import cStringIO
+import itertools
+from . import layout as _layout
+import nilmdb.utils
+from nilmdb.utils.time import float_time_to_string as ftts
+
+ERR_UNKNOWN = 0
+ERR_NON_MONOTONIC = 1
+ERR_OUT_OF_INTERVAL = 2
+class ParseError(Exception):
+    pass
+
+@nilmdb.utils.must_close(wrap_verify = False)
+class Rocket(object):
+    def __init__(self, layout, filename):
+        self.layout = layout
+        if filename:
+            self.file = open(filename, "a+b")
+        else:
+            self.file = None
+
+        # For packing/unpacking into a binary file.
+        # This will change in the C version
+        try:
+            (self.ltype, lcount) = layout.split('_', 2)
+            self.lcount = int(lcount)
+        except:
+            raise ValueError("no such layout: badly formatted string")
+        if self.lcount < 1:
+            raise ValueError("no such layout: bad count")
+        try:
+            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[self.ltype] * self.lcount
+        except KeyError:
+            raise ValueError("no such layout: bad data type")
+        self.packer = struct.Struct(struct_fmt)
+
+        # For packing/unpacking from strings.
+        self.layoutparser = _layout.Layout(self.layout)
+        self.formatter = _layout.Formatter(self.layout)
+
+    def close(self):
+        if self.file:
+            self.file.close()
+
+    @property
+    def binary_size(self):
+        """Return size of one row of data in the binary file, in bytes"""
+        return self.packer.size
+
+    def append_iter(self, maxrows, data):
+        """Append the list data to the file"""
+        # We assume the file is opened in append mode,
+        # so all writes go to the end.
+        written = 0
+        for row in itertools.islice(data, maxrows):
+            self.file.write(self.packer.pack(*row))
+            written += 1
+        self.file.flush()
+        return written
+
+    def append_string(self, count, data, data_offset, linenum,
+                      start, end, last_timestamp):
+        """Parse string and append data.
+
+          count: maximum number of rows to add
+          data: string data
+          data_offset: byte offset into data to start parsing
+          linenum: current line number of data
+          start: starting timestamp for interval
+          end: end timestamp for interval
+          last_timestamp: last timestamp that was previously parsed
+
+        Raises ParseError if timestamps are non-monotonic, outside the
+        start/end interval, etc.
+
+        On success, return a tuple with three values:
+          added_rows: how many rows were added from the file
+          data_offset: current offset into the data string
+          last_timestamp: last timestamp we parsed
+        """
+        # Parse the input data
+        indata = cStringIO.StringIO(data)
+        indata.seek(data_offset)
+        written = 0
+        while written < count:
+            line = indata.readline()
+            linenum += 1
+            if line == "":
+                break
+            comment = line.find('#')
+            if comment >= 0:
+                line = line.split('#', 1)[0]
+            line = line.strip()
+            if line == "":
+                continue
+            try:
+                (ts, row) = self.layoutparser.parse(line)
+            except ValueError as e:
+                raise ParseError(linenum, 0, ERR_UNKNOWN, e)
+            if ts <= last_timestamp:
+                raise ParseError(linenum, 0, ERR_NON_MONOTONIC, ts)
+            last_timestamp = ts
+            if ts < start or ts >= end:
+                raise ParseError(linenum, 0, ERR_OUT_OF_INTERVAL, ts)
+            self.append_iter(1, [row])
+            written += 1
+        return (written, indata.tell(), last_timestamp, linenum)
+
+    def extract_list(self, offset, count):
+        """Extract count rows of data from the file at offset offset.
+        Return a list of lists [[row],[row],...]"""
+        ret = []
+        self.file.seek(offset)
+        for i in xrange(count):
+            data = self.file.read(self.binary_size)
+            ret.append(list(self.packer.unpack(data)))
+        return ret
+
+    def extract_string(self, offset, count):
+        """Extract count rows of data from the file at offset offset.
+        Return an ascii formatted string according to the layout"""
+        return self.formatter.format(self.extract_list(offset, count))

nilmdb/server/rocket.c

@@ -0,0 +1,816 @@
+#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
+
+/* 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_num(int line, int col, int code, double num)
+{
+	PyObject *o;
+	o = Py_BuildValue("(iiid)", 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 iterator
+ */
+
+/* Helper for writing Python objects to the file */
+static inline void append_pyobject(FILE *out, PyObject *val, layout_type_t type)
+{
+	union8_t t8;
+	union16_t t16;
+	union32_t t32;
+	union64_t t64;
+	int ret = 0;
+
+	switch (type) {
+#define CASE(type, pyconvert, pytype, disktype, htole, bytes)	     \
+		case LAYOUT_TYPE_##type:			     \
+			pytype = pyconvert(val);		     \
+			if (PyErr_Occurred())			     \
+				return;				     \
+			disktype = htole(disktype);		     \
+			ret = fwrite(&disktype, bytes, 1, out);	     \
+			break
+		CASE(INT8,   PyInt_AsLong, t8.i,  t8.u,         , 1);
+		CASE(UINT8,  PyInt_AsLong, t8.u,  t8.u,         , 1);
+		CASE(INT16,  PyInt_AsLong, t16.i, t16.u, htole16, 2);
+		CASE(UINT16, PyInt_AsLong, t16.u, t16.u, htole16, 2);
+		CASE(INT32,  PyInt_AsLong, t32.i, t32.u, htole32, 4);
+		CASE(UINT32, PyInt_AsLong, t32.u, t32.u, htole32, 4);
+		CASE(INT64,  PyInt_AsLong, t64.i, t64.u, htole64, 8);
+		CASE(UINT64, PyInt_AsLong, t64.u, t64.u, htole64, 8);
+		CASE(FLOAT32, PyFloat_AsDouble, t32.f, t32.u, htole32, 4);
+		CASE(FLOAT64, PyFloat_AsDouble, t64.d, t64.u, htole64, 8);
+#undef CASE
+	default:
+		PyErr_SetString(PyExc_TypeError, "unknown type");
+		return;
+	}
+	if (ret <= 0) {
+		PyErr_SetFromErrno(PyExc_OSError);
+	}
+}
+/* .append_iter(maxrows, dataiter) */
+static PyObject *Rocket_append_iter(Rocket *self, PyObject *args)
+{
+	int maxrows;
+	PyObject *iter;
+	PyObject *rowlist;
+	if (!PyArg_ParseTuple(args, "iO:append_iter", &maxrows, &iter))
+		return NULL;
+	if (!PyIter_Check(iter)) {
+		PyErr_SetString(PyExc_TypeError, "need an iterable");
+		return NULL;
+	}
+	if (!self->file) {
+		PyErr_SetString(PyExc_Exception, "no file");
+		return NULL;
+	}
+
+	/* Mark file size so that it will get updated next time it's read */
+	self->file_size = -1;
+
+	int row;
+	for (row = 0; row < maxrows; row++) {
+		rowlist = PyIter_Next(iter);
+		if (!rowlist)
+			break;
+		if (!PyList_Check(rowlist)) {
+			PyErr_SetString(PyExc_TypeError, "rows must be lists");
+			goto row_err;
+		}
+		if (PyList_Size(rowlist) != self->layout_count + 1) {
+			PyErr_SetString(PyExc_TypeError, "short row");
+			goto row_err;
+		}
+
+		/* Extract and write timestamp */
+		append_pyobject(self->file, PyList_GetItem(rowlist, 0),
+				LAYOUT_TYPE_FLOAT64);
+		if (PyErr_Occurred())
+			goto row_err;
+
+		/* Extract and write values */
+		int i;
+		for (i = 0; i < self->layout_count; i++) {
+			append_pyobject(self->file,
+					PyList_GetItem(rowlist, i+1),
+					self->layout_type);
+			if (PyErr_Occurred())
+				goto row_err;
+		}
+	}
+	fflush(self->file);
+	/* All done */
+	return PyLong_FromLong(row);
+row_err:
+	fflush(self->file);
+	Py_DECREF(rowlist);
+	return NULL;
+}
+
+/****
+ * 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;
+	double start;
+	double end;
+	double 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, "isiiddd: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.d = strtod(buf, &endptr);
+		if (endptr == buf)
+			return raise_str(linenum, buf - linestart + 1,
+					 ERR_OTHER, "bad timestamp");
+		if (t64.d <= last_timestamp)
+			return raise_num(linenum, buf - linestart + 1,
+					 ERR_NON_MONOTONIC, t64.d);
+		last_timestamp = t64.d;
+		if (t64.d < start || t64.d >= end)
+			return raise_num(linenum, buf - linestart + 1,
+					 ERR_OUT_OF_INTERVAL, t64.d);
+		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("(iidi)", written, offset, last_timestamp, linenum);
+	return o;
+err:
+	PyErr_SetFromErrno(PyExc_OSError);
+	return NULL;
+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 Python list
+ */
+
+static int _extract_handle_params(Rocket *self, PyObject *args, long *count)
+{
+	long offset;
+	if (!PyArg_ParseTuple(args, "ll", &offset, count))
+		return -1;
+	if (!self->file) {
+		PyErr_SetString(PyExc_Exception, "no file");
+		return -1;
+	}
+	/* Seek to target location */
+	if (fseek(self->file, offset, SEEK_SET) < 0) {
+		PyErr_SetFromErrno(PyExc_OSError);
+		return -1;
+	}
+	return 0;
+}
+
+/* Helper for extracting data from a file as a Python object */
+static inline void *extract_pyobject(FILE *in, layout_type_t type)
+{
+	union8_t t8;
+	union16_t t16;
+	union32_t t32;
+	union64_t t64;
+
+	switch (type) {
+#define CASE(type, pyconvert, pytype, disktype, letoh, bytes)		\
+		case LAYOUT_TYPE_##type:				\
+			if (fread(&disktype, bytes, 1, in) <= 0)	\
+				break;					\
+			disktype = letoh(disktype);			\
+			return pyconvert(pytype);			\
+			break
+		CASE(INT8,   PyInt_FromLong, t8.i,  t8.u,         , 1);
+		CASE(UINT8,  PyInt_FromLong, t8.u,  t8.u,         , 1);
+		CASE(INT16,  PyInt_FromLong, t16.i, t16.u, le16toh, 2);
+		CASE(UINT16, PyInt_FromLong, t16.u, t16.u, le16toh, 2);
+		CASE(INT32,  PyInt_FromLong, t32.i, t32.u, le32toh, 4);
+		CASE(UINT32, PyInt_FromLong, t32.u, t32.u, le32toh, 4);
+		CASE(INT64,  PyInt_FromLong, t64.i, t64.u, le64toh, 8);
+		CASE(UINT64, PyInt_FromLong, t64.u, t64.u, le64toh, 8);
+		CASE(FLOAT32, PyFloat_FromDouble, t32.f, t32.u, le32toh, 4);
+		CASE(FLOAT64, PyFloat_FromDouble, t64.d, t64.u, le64toh, 8);
+#undef CASE
+	default:
+		PyErr_SetString(PyExc_TypeError, "unknown type");
+		return NULL;
+	}
+	PyErr_SetString(PyExc_OSError, "failed to read from file");
+	return NULL;
+}
+
+static PyObject *Rocket_extract_list(Rocket *self, PyObject *args)
+{
+	long count;
+	if (_extract_handle_params(self, args, &count) < 0)
+		return NULL;
+
+	/* Make a list to return */
+	PyObject *retlist = PyList_New(0);
+	if (!retlist)
+		return NULL;
+
+	/* Read data into new Python lists */
+	int row;
+	for (row = 0; row < count; row++)
+	{
+		PyObject *rowlist = PyList_New(self->layout_count + 1);
+		if (!rowlist) {
+			Py_DECREF(retlist);
+			return NULL;
+		}
+
+		/* Timestamp */
+		PyObject *entry = extract_pyobject(self->file,
+						   LAYOUT_TYPE_FLOAT64);
+		if (!entry || (PyList_SetItem(rowlist, 0, entry) < 0)) {
+			Py_DECREF(rowlist);
+			Py_DECREF(retlist);
+			return NULL;
+		}
+
+		/* Data */
+		int i;
+		for (i = 0; i < self->layout_count; i++) {
+			PyObject *ent = extract_pyobject(self->file,
+							 self->layout_type);
+			if (!ent || (PyList_SetItem(rowlist, i+1, ent) < 0)) {
+				Py_DECREF(rowlist);
+				Py_DECREF(retlist);
+				return NULL;
+			}
+		}
+
+		/* Add row to return value */
+		if (PyList_Append(retlist, rowlist) < 0) {
+			Py_DECREF(rowlist);
+			Py_DECREF(retlist);
+			return NULL;
+		}
+
+		Py_DECREF(rowlist);
+	}
+	return retlist;
+}
+
+/****
+ * Extract to string
+ */
+
+static PyObject *Rocket_extract_string(Rocket *self, PyObject *args)
+{
+	long count;
+	if (_extract_handle_params(self, args, &count) < 0)
+		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);
+		/* Timestamps are always printed to the microsecond */
+		ret = sprintf(&str[len], "%.6f", t64.d);
+		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;
+}
+
+/****
+ * 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_iter", (PyCFunction)Rocket_append_iter, METH_VARARGS,
+	  "append_iter(self, maxrows, iterable)\n\n"
+	  "Append up to maxrows of data from iter to the file" },
+
+	{ "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_list", (PyCFunction)Rocket_extract_list, METH_VARARGS,
+	  "extract_list(self, offset, count)\n\n"
+	  "Extract count rows of data from the file at offset offset.\n"
+	  "Return a list of lists [[row],[row],...]" },
+
+	{ "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" },
+
+	{ 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

@@ -3,7 +3,7 @@
 # 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
 
@@ -12,7 +12,6 @@ import sys
 import os
 import simplejson as json
 import decorator
-import traceback
 import psutil
 
 class NilmApp(object):
@@ -45,12 +44,17 @@ 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" +
-                        traceback.format_exc())
+        # Re-raise it, but maintain the original traceback
+        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
@@ -61,26 +65,74 @@ def exception_to_httperror(*expected):
             pass
     """
     def wrapper(func, *args, **kwargs):
+        exc_info = None
         try:
             return func(*args, **kwargs)
-        except expected as e:
-            message = sprintf("%s", str(e))
-            raise cherrypy.HTTPError("400 Bad Request", message)
+        except expected:
+            # Re-raise it, but maintain the original traceback
+            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.
     return decorator.decorator(wrapper)
 
-# Custom Cherrypy tools
-def allow_methods(methods):
-    method = cherrypy.request.method.upper()
-    if method not in methods:
-        if method in cherrypy.request.methods_with_bodies:
-            cherrypy.request.body.read()
-        allowed = ', '.join(methods)
-        cherrypy.response.headers['Allow'] = allowed
-        raise cherrypy.HTTPError(405, method + " not allowed; use " + allowed)
-cherrypy.tools.allow_methods = cherrypy.Tool('before_handler', allow_methods)
+# Custom CherryPy tools
+
+def CORS_allow(methods):
+    """This does several things:
+
+    Handles CORS preflight requests.
+    Adds Allow: header to all requests.
+    Raise 405 if request.method not in method.
+
+    It is similar to cherrypy.tools.allow, with the CORS stuff added.
+    """
+    request = cherrypy.request.headers
+    response = cherrypy.response.headers
+
+    if not isinstance(methods, (tuple, list)): # pragma: no cover
+        methods = [ methods ]
+    methods = [ m.upper() for m in methods if m ]
+    if not methods: # pragma: no cover
+        methods = [ 'GET', 'HEAD' ]
+    elif 'GET' in methods and 'HEAD' not in methods: # pragma: no cover
+        methods.append('HEAD')
+    response['Allow'] = ', '.join(methods)
+
+    # Allow all origins
+    if 'Origin' in request:
+        response['Access-Control-Allow-Origin'] = request['Origin']
+
+    # If it's a CORS request, send response.
+    request_method = request.get("Access-Control-Request-Method", None)
+    request_headers = request.get("Access-Control-Request-Headers", None)
+    if (cherrypy.request.method == "OPTIONS" and
+        request_method and request_headers):
+        response['Access-Control-Allow-Headers'] = request_headers
+        response['Access-Control-Allow-Methods'] = ', '.join(methods)
+        # Try to stop further processing and return a 200 OK
+        cherrypy.response.status = "200 OK"
+        cherrypy.response.body = ""
+        cherrypy.request.handler = lambda: ""
+        return
+
+    # Reject methods that were not explicitly allowed
+    if cherrypy.request.method not in methods:
+        raise cherrypy.HTTPError(405)
+
+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):
@@ -120,11 +172,11 @@ class Stream(NilmApp):
     """Stream-specific operations"""
 
     # /stream/list
-    # /stream/list?layout=PrepData
-    # /stream/list?path=/newton/prep&extent=1
+    # /stream/list?layout=float32_8
+    # /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.
@@ -132,17 +184,18 @@ 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
-        path, layout, and min/max extent of the data:
-        [ path, layout, extent_min, extent_max ]
+        If extended is provided, returns a list of lists containing
+        extended info: [ 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.allow_methods(methods = ["POST"])
+    @cherrypy.tools.CORS_allow(methods = ["POST"])
     def create(self, path, layout):
         """Create a new stream in the database.  Provide path
         and one of the nilmdb.layout.layouts keys.
@@ -151,9 +204,10 @@ class Stream(NilmApp):
 
     # /stream/destroy?path=/newton/prep
     @cherrypy.expose
+    @cherrypy.tools.json_in()
     @cherrypy.tools.json_out()
     @exception_to_httperror(NilmDBError)
-    @cherrypy.tools.allow_methods(methods = ["POST"])
+    @cherrypy.tools.CORS_allow(methods = ["POST"])
     def destroy(self, path):
         """Delete a stream and its associated data."""
         return self.db.stream_destroy(path)
@@ -182,33 +236,47 @@ 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)
-    @cherrypy.tools.allow_methods(methods = ["POST"])
+    @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
-        existing metadata.  Data should be a json-encoded
-        dictionary"""
-        data_dict = json.loads(data)
-        self.db.stream_set_metadata(path, data_dict)
+        """Set metadata for the named stream, replacing any existing
+        metadata.  Data can be json-encoded or a plain dictionary."""
+        self._metadata_helper(self.db.stream_set_metadata, path, data)
 
     # /stream/update_metadata?path=/newton/prep&data=<json>
     @cherrypy.expose
+    @cherrypy.tools.json_in()
     @cherrypy.tools.json_out()
-    @exception_to_httperror(NilmDBError, LookupError, TypeError)
-    @cherrypy.tools.allow_methods(methods = ["POST"])
+    @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
-        should be a json-encoded dictionary"""
-        data_dict = json.loads(data)
-        self.db.stream_update_metadata(path, data_dict)
+        """Set metadata for the named stream, replacing any existing
+        metadata.  Data can be json-encoded or a plain dictionary."""
+        self._metadata_helper(self.db.stream_update_metadata, path, data)
 
     # /stream/insert?path=/newton/prep
     @cherrypy.expose
     @cherrypy.tools.json_out()
-    @cherrypy.tools.allow_methods(methods = ["PUT"])
+    @exception_to_httperror(NilmDBError, ValueError)
+    @cherrypy.tools.CORS_allow(methods = ["PUT"])
     def insert(self, path, start, end):
         """
         Insert new data into the database.  Provide textual data
@@ -224,16 +292,6 @@ 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]
-
-        # 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)
@@ -241,20 +299,10 @@ class Stream(NilmApp):
         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.
-        try:
-            self.db.stream_insert(path, start, end, parser.data)
-        except NilmDBError as e:
-            raise cherrypy.HTTPError("400 Bad Request", e.message)
+        # Pass the data directly to nilmdb, which will parse it and
+        # raise a ValueError if there are any problems.
+        self.db.stream_insert(path, start, end, body)
 
         # Done
         return
@@ -262,9 +310,10 @@ 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.allow_methods(methods = ["POST"])
+    @cherrypy.tools.CORS_allow(methods = ["POST"])
     def remove(self, path, start = None, end = None):
         """
         Remove data from the backend database.  Removes all data in
@@ -283,16 +332,22 @@ class Stream(NilmApp):
 
     # /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.
         """
@@ -306,15 +361,18 @@ class Stream(NilmApp):
                 raise cherrypy.HTTPError("400 Bad Request",
                                          "start must precede end")
 
-        streams = self.db.stream_list(path = path)
-        if len(streams) != 1:
-            raise cherrypy.HTTPError("404 Not Found", "No such stream")
+        if len(self.db.stream_list(path = path)) != 1:
+            raise cherrypy.HTTPError("404", "No such stream: " + path)
+
+        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:
@@ -350,10 +408,6 @@ 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):
@@ -365,9 +419,7 @@ class Stream(NilmApp):
 
             while True:
                 (data, restart) = self.db.stream_extract(path, start, end)
-
-                # Format the data and yield it
-                yield formatter.format(data)
+                yield data
 
                 if restart == 0:
                     return
@@ -419,16 +471,20 @@ class Server(object):
             'error_page.default': self.json_error_page,
             })
 
-        # Send a permissive Access-Control-Allow-Origin (CORS) header
-        # with all responses so that browsers can send cross-domain
-        # requests to this server.
-        app_config.update({ 'response.headers.Access-Control-Allow-Origin':
-                            '*' })
+        # Some default headers to just help identify that things are working
+        app_config.update({ 'response.headers.X-Jim-Is-Awesome': 'yeah' })
 
-        # Only allow GET and HEAD by default.  Individual handlers
-        # can override.
-        app_config.update({ 'tools.allow_methods.on': True,
-                            'tools.allow_methods.methods': ['GET', 'HEAD'] })
+        # Set up Cross-Origin Resource Sharing (CORS) handler so we
+        # can correctly respond to browsers' CORS preflight requests.
+        # This also limits verbs to GET and HEAD by default.
+        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).

nilmdb/utils/__init__.py

@@ -8,3 +8,6 @@ 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

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/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

@@ -19,6 +19,16 @@ def parse_time(toparse):
     except ValueError:
         pass
 
+    # Try to treat it as a single double
+    try:
+        timestamp = float(toparse)
+        # range is from about year 2001 - 2065
+        if timestamp < 1e9 or timestamp > 3e9:
+            raise ValueError
+        return datetime_tz.datetime_tz.fromtimestamp(timestamp)
+    except ValueError:
+        pass
+
     # Try to extract a substring in a condensed format that we expect
     # to see in a filename or header comment
     res = re.search(r"(^|[^\d])("            # non-numeric or SOL
@@ -52,3 +62,8 @@ def format_time(timestamp):
     """
     dt = datetime_tz.datetime_tz.fromtimestamp(timestamp)
     return dt.strftime("%a, %d %b %Y %H:%M:%S.%f %z")
+
+def float_time_to_string(timestamp):
+    """Convert a floating-point Unix timestamp to a string,
+    like '1234567890.000000'"""
+    return "%.6f" % timestamp

nilmdb/utils/timestamper.py

@@ -70,9 +70,6 @@ class TimestamperRate(Timestamper):
                     raise StopIteration
                 yield sprintf("%.6f ", start + n / rate)
                 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
@@ -92,13 +89,3 @@ class TimestamperNow(Timestamper):
         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

@@ -56,7 +56,7 @@ 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:

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
-1332496830.025000 257614.000000 223323.000000 5003.660156 3525.139893 7165.310059 4685.620117 1715.380005 3440.479980
-1332496830.033333 255780.000000 221915.000000 6357.310059 2145.290039 8426.969727 3775.350098 1475.390015 3797.239990
-1332496830.041667 260166.000000 223008.000000 6702.589844 1484.959961 9288.099609 3330.830078 1228.500000 3214.320068
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tests/data/extract-2

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tests/data/extract-3

@@ -1 +1 @@
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tests/data/extract-4

@@ -1,2 +1,2 @@
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tests/data/extract-5

@@ -1,124 +1,124 @@
 # path: /newton/prep
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 # 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
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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/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):
@@ -70,6 +68,13 @@ class TestBulkData(object):
         for s in misc_slices:
             eq_(node[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([[0,0,0,0,0,0,0,0,0]])
+            raw.append([0,0,0,0,0,0,0,0,0])
+            eq_(node[s], raw[s])
+
         # Get some coverage of remove; remove is more fully tested
         # in cmdline
         with assert_raises(IndexError):

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_server = nilmdb.Server(test_db, host = "127.0.0.1",
-                                port = 32180, stoppable = False,
-                                fast_shutdown = True,
-                                force_traceback = False)
+    test_db = nilmdb.utils.serializer_proxy(nilmdb.server.NilmDB)(testdb)
+    test_server = nilmdb.server.Server(test_db, host = "127.0.0.1",
+                                       port = 32180, stoppable = False,
+                                       fast_shutdown = True,
+                                       force_traceback = True)
     test_server.start(blocking = False)
 
 def teardown_module():
@@ -50,30 +52,24 @@ class TestClient(object):
 
     def test_client_01_basic(self):
         # Test a fake host
-        client = nilmdb.Client(url = "http://localhost:1/")
-        with assert_raises(nilmdb.client.ServerError):
-            client.version()
-        client.close()
-
-        # Trigger same error with a PUT request
-        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))
@@ -85,16 +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")
@@ -106,23 +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/raw", "RawData")
-        client.stream_create("/newton/zzz/rawnotch", "RawNotchedData")
+        client.stream_create("/newton/prep", "float32_8")
+        client.stream_create("/newton/raw", "uint16_6")
+        client.stream_create("/newton/zzz/rawnotch", "uint16_9")
 
         # Verify we got 3 streams
-        eq_(client.stream_list(), [ ["/newton/prep", "PrepData"],
-                                    ["/newton/raw", "RawData"],
-                                    ["/newton/zzz/rawnotch", "RawNotchedData"]
+        eq_(client.stream_list(), [ ["/newton/prep", "float32_8"],
+                                    ["/newton/raw", "uint16_6"],
+                                    ["/newton/zzz/rawnotch", "uint16_9"]
                                     ])
         # Match just one type or one path
-        eq_(client.stream_list(layout="RawData"),
-            [ ["/newton/raw", "RawData"] ])
+        eq_(client.stream_list(layout="uint16_6"),
+            [ ["/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
@@ -131,13 +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"), {})
@@ -168,10 +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
@@ -196,7 +202,8 @@ 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("")
@@ -238,7 +245,7 @@ class TestClient(object):
             result = client.stream_insert("/newton/prep", data,
                                           start + 5, start + 120)
         in_("400 Bad Request", str(e.exception))
-        in_("Data timestamp 1332511200.0 < start time 1332511205.0",
+        in_("Data timestamp 1332511200.000000 < start time 1332511205.000000",
             str(e.exception))
 
         # Specify start/end (ends too early)
@@ -250,7 +257,7 @@ class TestClient(object):
         # 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]+ "
-                         ">= end time 1332511201.0", str(e.exception))
+                         ">= end time 1332511201.000000", str(e.exception))
                is not None)
 
         # Now do the real load
@@ -275,7 +282,7 @@ 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):
             raise AssertionError("shouldn't be any data for this request")
@@ -291,7 +298,7 @@ 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")
@@ -327,7 +334,7 @@ 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
@@ -360,52 +367,48 @@ class TestClient(object):
             raise AssertionError("/stream/extract is not text/plain:\n" +
                                  headers())
 
-        # Make sure Access-Control-Allow-Origin gets set
-        if "access-control-allow-origin: " not in headers():
-            raise AssertionError("No Access-Control-Allow-Origin (CORS) "
-                                 "header in /stream/extract response:\n" +
-                                 headers())
-
         client.close()
 
     def test_client_08_unicode(self):
-        # Basic Unicode tests
-        client = nilmdb.Client(url = testurl)
+        # Try both with and without posting JSON
+        for post_json in (False, True):
+            # Basic Unicode tests
+            client = nilmdb.client.Client(url = testurl, post_json = post_json)
 
-        # Delete streams that exist
-        for stream in client.stream_list():
-            client.stream_destroy(stream[0])
+            # Delete streams that exist
+            for stream in client.stream_list():
+                client.stream_destroy(stream[0])
 
-        # Database is empty
-        eq_(client.stream_list(), [])
+            # Database is empty
+            eq_(client.stream_list(), [])
 
-        # Create Unicode stream, match it
-        raw = [ u"/düsseldorf/raw", u"uint16_6" ]
-        prep = [ u"/düsseldorf/prep", u"uint16_6" ]
-        client.stream_create(*raw)
-        eq_(client.stream_list(), [raw])
-        eq_(client.stream_list(layout=raw[1]), [raw])
-        eq_(client.stream_list(path=raw[0]), [raw])
-        client.stream_create(*prep)
-        eq_(client.stream_list(), [prep, raw])
+            # Create Unicode stream, match it
+            raw = [ u"/düsseldorf/raw", u"uint16_6" ]
+            prep = [ u"/düsseldorf/prep", u"uint16_6" ]
+            client.stream_create(*raw)
+            eq_(client.stream_list(), [raw])
+            eq_(client.stream_list(layout=raw[1]), [raw])
+            eq_(client.stream_list(path=raw[0]), [raw])
+            client.stream_create(*prep)
+            eq_(client.stream_list(), [prep, raw])
 
-        # Set / get metadata with Unicode keys and values
-        eq_(client.stream_get_metadata(raw[0]), {})
-        eq_(client.stream_get_metadata(prep[0]), {})
-        meta1 = { u"alpha": u"α",
-                  u"β": u"beta" }
-        meta2 = { u"alpha": u"α" }
-        meta3 = { u"β": u"beta" }
-        client.stream_set_metadata(prep[0], meta1)
-        client.stream_update_metadata(prep[0], {})
-        client.stream_update_metadata(raw[0], meta2)
-        client.stream_update_metadata(raw[0], meta3)
-        eq_(client.stream_get_metadata(prep[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", "β" ]), meta1)
+            # Set / get metadata with Unicode keys and values
+            eq_(client.stream_get_metadata(raw[0]), {})
+            eq_(client.stream_get_metadata(prep[0]), {})
+            meta1 = { u"alpha": u"α",
+                      u"β": u"beta" }
+            meta2 = { u"alpha": u"α" }
+            meta3 = { u"β": u"beta" }
+            client.stream_set_metadata(prep[0], meta1)
+            client.stream_update_metadata(prep[0], {})
+            client.stream_update_metadata(raw[0], meta2)
+            client.stream_update_metadata(raw[0], meta3)
+            eq_(client.stream_get_metadata(prep[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", "β" ]), meta1)
 
-        client.close()
+            client.close()
 
     def test_client_09_closing(self):
         # Make sure we actually close sockets correctly.  New
@@ -419,68 +422,86 @@ 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_line("100 1")
+            ctx.insert("100 1\n")
 
-            ctx.insert_line("100 1\n")
-            ctx.insert_iter([ "101 1\n",
-                              "102 1\n",
-                              "103 1\n" ])
-            ctx.insert_line("104 1\n")
-            ctx.insert_line("105 1\n")
+            ctx.insert("101 ")
+            ctx.insert("1\n102 1")
+            ctx.insert("")
+            ctx.insert("\n103 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("106 1\n")
             ctx.update_end(106.5)
             ctx.finalize()
             ctx.update_start(106.8)
-            ctx.insert_line("107 1\n")
-            ctx.insert_line("108 1\n")
-            ctx.insert_line("109 1\n")
-            ctx.insert_line("110 1\n")
-            ctx.insert_line("111 1\n")
+            ctx.insert("107 1\n")
+            ctx.insert("108 1\n")
+            ctx.insert("109 1\n")
+            ctx.insert("110 1\n")
+            ctx.insert("111 1\n")
             ctx.update_end(113)
-            ctx.insert_line("112 1\n")
+            ctx.insert("112 1\n")
             ctx.update_end(114)
-            ctx.insert_line("113 1\n")
+            ctx.insert("113 1\n")
             ctx.update_end(115)
-            ctx.insert_line("114 1\n")
+            ctx.insert("114 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("115 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("115 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 ],
               [ 106, 106.5 ],
@@ -494,7 +515,7 @@ 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():
@@ -509,9 +530,9 @@ 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_line("150 1\n")
-            ctx.insert_line("160 1\n")
+            ctx.insert("140 1\n")
+            ctx.insert("150 1\n")
+            ctx.insert("160 1\n")
             ctx.update_end(200)
             ctx.finalize()
 
@@ -524,7 +545,7 @@ 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
@@ -545,10 +566,10 @@ 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.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)
@@ -556,8 +577,15 @@ 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
@@ -570,6 +598,7 @@ class TestClient(object):
                      (1, [1100, 1100.000001]),
                      (1, [1199, 1250]),
                      (0, [1400, 1450]),
+                     (0, [1500, 1550]),
                      ])
 
         # Clean up
@@ -580,7 +609,7 @@ 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

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
@@ -11,12 +12,7 @@ from nose.tools import assert_raises
 import itertools
 import os
 import re
-import shutil
 import sys
-import threading
-import urllib2
-from urllib2 import urlopen, HTTPError
-import Queue
 import StringIO
 import shlex
 
@@ -27,14 +23,14 @@ testdb = "tests/cmdline-testdb"
 def server_start(max_results = None, bulkdata_args = {}):
     global test_server, test_db
     # 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,
         max_results = max_results,
         bulkdata_args = bulkdata_args)
-    test_server = nilmdb.Server(test_db, host = "127.0.0.1",
-                                port = 32180, stoppable = False,
-                                fast_shutdown = True,
-                                force_traceback = False)
+    test_server = nilmdb.server.Server(test_db, host = "127.0.0.1",
+                                       port = 32180, stoppable = False,
+                                       fast_shutdown = True,
+                                       force_traceback = False)
     test_server.start(blocking = False)
 
 def server_stop():
@@ -130,8 +126,17 @@ class TestCmdline(object):
         with open(file) as f:
             contents = f.read()
             if contents != self.captured:
-                print contents[1:1000] + "\n"
-                print self.captured[1:1000] + "\n"
+                print "--- reference file (first 1000 bytes):\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):
@@ -240,10 +245,10 @@ 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")
 
         # Bad layout type
@@ -255,53 +260,53 @@ class TestCmdline(object):
         self.contain("no such layout")
 
         # Create a few streams
-        self.ok("create /newton/zzz/rawnotch RawNotchedData")
-        self.ok("create /newton/prep PrepData")
-        self.ok("create /newton/raw RawData")
+        self.ok("create /newton/zzz/rawnotch uint16_9")
+        self.ok("create /newton/prep float32_8")
+        self.ok("create /newton/raw uint16_6")
 
         # 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"
-                   "/newton/raw RawData\n"
-                   "/newton/zzz/rawnotch RawNotchedData\n")
+        self.match("/newton/prep float32_8\n"
+                   "/newton/raw uint16_6\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.match("/newton/raw RawData\n")
+        self.ok("list --layout uint16_6")
+        self.match("/newton/raw uint16_6\n")
 
         # Wildcard matches
-        self.ok("list --layout Raw*")
-        self.match("/newton/raw RawData\n"
-                   "/newton/zzz/rawnotch RawNotchedData\n")
+        self.ok("list --layout uint16*")
+        self.match("/newton/raw uint16_6\n"
+                   "/newton/zzz/rawnotch uint16_9\n")
 
-        self.ok("list --path *zzz* --layout Raw*")
-        self.match("/newton/zzz/rawnotch RawNotchedData\n")
+        self.ok("list --path *zzz* --layout uint16*")
+        self.match("/newton/zzz/rawnotch uint16_9\n")
 
-        self.ok("list *zzz* --layout Raw*")
-        self.match("/newton/zzz/rawnotch RawNotchedData\n")
+        self.ok("list *zzz* --layout uint16*")
+        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
@@ -368,43 +373,49 @@ 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.contain("error extracting time")
+        self.fail("insert /newton/prep --timestamp -f -r 120")
+        self.contain("error extracting start time")
 
-        self.fail("insert --start 19801205 /newton/prep 1 2 3 4")
-        self.contain("--start can only be used with one input file")
+        self.fail("insert /newton/prep --timestamp -r 120")
+        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 "
-                "tests/data/prep-20120323T1000 "
+        self.ok("insert --timestamp -f --rate 120 /newton/prep "
+                "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")
 
@@ -416,24 +427,33 @@ 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)
@@ -471,23 +491,28 @@ 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("[ 1332497115.500000 -> 1332497160.000000 ]")
 
-        self.ok("list --detail --path *prep -T "
-                "--start='23 Mar 2012 10:05:15.612'")
+        # bad time
+        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("[ 1332497115.612000 -> 1332497160.000000 ]")
 
-        # Check --extent output
-        self.ok("list --extent")
-        lines_(self.captured, 6)
+        # Check --ext output
+        self.ok("list --ext")
+        lines_(self.captured, 9)
 
         self.ok("list -E -T")
-        self.contain("  extent: 1332496800 -> 1332497159.991668")
-        self.contain("  extent: (no data)")
+        c = self.contain
+        c("\n  interval extents: 1332496800.000000 -> 1332497160.000000\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):
@@ -599,13 +624,13 @@ 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.
@@ -634,7 +659,7 @@ 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"
@@ -648,14 +673,15 @@ 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"
-        self.ok("insert --rate 120 /newton/prep "
-                "tests/data/prep-20120323T1000 "
+        self.ok("insert --timestamp -f --rate 120 /newton/prep "
+                "tests/data/prep-20120323T1000")
+        self.ok("insert -t --filename --rate 120 /newton/prep "
                 "tests/data/prep-20120323T1002")
 
     def test_11_destroy(self):
@@ -673,9 +699,9 @@ class TestCmdline(object):
 
         # From previous tests, we have:
         self.ok("list")
-        self.match("/newton/prep PrepData\n"
-                   "/newton/raw RawData\n"
-                   "/newton/zzz/rawnotch RawNotchedData\n")
+        self.match("/newton/prep float32_8\n"
+                   "/newton/raw uint16_6\n"
+                   "/newton/zzz/rawnotch uint16_9\n")
 
         # Notice how they're not empty
         self.ok("list --detail")
@@ -684,15 +710,15 @@ class TestCmdline(object):
         # Delete some
         self.ok("destroy /newton/prep")
         self.ok("list")
-        self.match("/newton/raw RawData\n"
-                   "/newton/zzz/rawnotch RawNotchedData\n")
+        self.match("/newton/raw uint16_6\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")
         self.ok("list")
         self.match("")
@@ -702,7 +728,7 @@ 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
@@ -740,7 +766,8 @@ 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' " +
@@ -772,7 +799,8 @@ 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)
         nfiles = 0
         for (dirpath, dirnames, filenames) in os.walk(testdb):
             nfiles += len(filenames)
@@ -788,10 +816,11 @@ class TestCmdline(object):
                                        "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 "
-                "tests/data/prep-20120323T1002 "
+        self.ok("insert -t --filename --rate 120 /newton/prep "
+                "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)
@@ -799,7 +828,7 @@ 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"
@@ -835,7 +864,7 @@ 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"
@@ -856,7 +885,7 @@ 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'")
@@ -867,8 +896,62 @@ 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 /diff/1")
+        self.ok("destroy /diff/2")

tests/test_interval.py

@@ -89,14 +89,14 @@ class TestInterval:
 
         # big integers and floats
         x = Interval(5000111222, 6000111222)
-        eq_(str(x), "[5000111222.0 -> 6000111222.0)")
+        eq_(str(x), "[5000111222.000000 -> 6000111222.000000)")
         x = Interval(123.45, 234.56)
-        eq_(str(x), "[123.45 -> 234.56)")
+        eq_(str(x), "[123.450000 -> 234.560000)")
 
         # misc
         i = Interval(d1, d2)
         eq_(repr(i), repr(eval(repr(i))))
-        eq_(str(i), "[1332561600.0 -> 1332648000.0)")
+        eq_(str(i), "[1332561600.000000 -> 1332648000.000000)")
 
     def test_interval_intersect(self):
         # Test Interval intersections
@@ -192,7 +192,8 @@ class TestInterval:
 
         # misc
         eq_(repr(iset), repr(eval(repr(iset))))
-        eq_(str(iset), "[[100.0 -> 200.0), [200.0 -> 300.0)]")
+        eq_(str(iset),
+            "[[100.000000 -> 200.000000), [200.000000 -> 300.000000)]")
 
     def test_intervalset_geniset(self):
         # Test basic iset construction
@@ -207,64 +208,89 @@ 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
-        eq_(makeset("[---|---)[)") &
-            list(makeset("  [------) "))[0],
-            makeset("  [-----)  "))
+        def do_test(a, b, c, d):
+            # a & b == c
+            ab = IntervalSet()
+            for x in b:
+                for i in (a & x):
+                    ab += i
+            eq_(ab,c)
 
-        # Intersection with sets
-        eq_(makeset("[---------)") &
-            makeset(" [---)     "),
-            makeset(" [---)     "))
+            # a \ b == d
+            eq_(IntervalSet(a.set_difference(b)), d)
 
-        eq_(makeset(" [---)     ") &
-            makeset("[---------)"),
-            makeset(" [---)     "))
+        # Intersection with intervals
+        do_test(makeset("[---|---)[)"),
+                makeset("  [------) "),
+                makeset("  [-----)  "), # intersection
+                makeset("[-)      [)")) # difference
 
-        eq_(makeset("    [-----)") &
-            makeset(" [-----)   "),
-            makeset("    [--)   "))
+        do_test(makeset("[---------)"),
+                makeset(" [---)     "),
+                makeset(" [---)     "), # intersection
+                makeset("[)   [----)")) # difference
 
-        eq_(makeset(" [--)  [--)") &
-            makeset("  [------) "),
-            makeset("  [-)  [-) "))
+        do_test(makeset(" [---)     "),
+                makeset("[---------)"),
+                makeset(" [---)     "), # intersection
+                makeset("           ")) # difference
 
-        eq_(makeset("      [---)") &
-            makeset(" [--)      "),
-            makeset("           "))
+        do_test(makeset("    [-----)"),
+                makeset(" [-----)   "),
+                makeset("    [--)   "), # intersection
+                makeset("       [--)")) # difference
 
-        eq_(makeset("    [-|---)") &
-            makeset(" [-----|-) "),
-            makeset("    [----) "))
+        do_test(makeset(" [--)  [--)"),
+                makeset("  [------) "),
+                makeset("  [-)  [-) "), # intersection
+                makeset(" [)      [)")) # difference
 
-        eq_(makeset("    [-|-)  ") &
-            makeset(" [-|--|--) "),
-            makeset("    [---)  "))
+        do_test(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,
-        # although that's a little messy since the database intervals
-        # often contain a data point at the endpoint.
-        half_open = True
-        if half_open:
-            eq_(makeset("      [---)") &
+        # half open or fully closed.  In nilmdb, they are half open.
+        do_test(makeset("      [---)"),
                 makeset(" [----)    "),
-                makeset("           "))
-            eq_(makeset(" [----)[--)") &
+                makeset("           "), # intersection
+                makeset("      [---)")) # difference
+
+        do_test(makeset(" [----)[--)"),
                 makeset("[-) [--) [)"),
-                makeset(" [) [-)  [)"))
-        else:
-            eq_(makeset("      [---)") &
-                makeset(" [----)    "),
-                makeset("      .    "))
-            eq_(makeset(" [----)[--)") &
-                makeset("[-) [--) [)"),
-                makeset(" [) [-). [)"))
+                makeset(" [) [-)  [)"), # intersection
+                makeset("  [-)  [-) ")) # difference
+
+        # Set difference with bounds
+        a = makeset(" [----)[--)")
+        b = makeset("[-) [--) [)")
+        c = makeset("[----)     ")
+        d = makeset("  [-)      ")
+        eq_(a.set_difference(b, list(c)[0]), d)
+
+        # Empty second set
+        eq_(a.set_difference(IntervalSet()), a)
 
 class TestIntervalDB:
     def test_dbinterval(self):
@@ -370,4 +396,3 @@ 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

@@ -9,14 +9,7 @@ from nose.tools import assert_raises
 import distutils.version
 import itertools
 import os
-import shutil
 import sys
-import cherrypy
-import threading
-import urllib2
-from urllib2 import urlopen, HTTPError
-import Queue
-import cStringIO
 import random
 import unittest
 
@@ -28,7 +21,7 @@ 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")
+        x = nilmdb.server.layout.get_named("float32_8")
         y = nilmdb.server.layout.get_named("float32_8")
         eq_(x.count, y.count)
         eq_(x.datatype, y.datatype)
@@ -37,7 +30,7 @@ class TestLayouts(object):
         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")
         self.real_t_parsing("float32_8", "uint16_6", "uint16_9")
     def real_t_parsing(self, name_prep, name_raw, name_rawnotch):
         # invalid layouts
@@ -72,7 +65,7 @@ class TestLayouts(object):
         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
+        # try uint16_6 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" )
@@ -106,7 +99,7 @@ class TestLayouts(object):
                  "1234567890.100001 1 2 3 4 5 6\n" )
         parser.parse(data)
 
-        # RawData with values out of bounds
+        # uint16_6 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" )
@@ -122,7 +115,7 @@ class TestLayouts(object):
         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")
         self.real_t_formatting("float32_8", "uint16_6", "uint16_9")
     def real_t_formatting(self, name_prep, name_raw, name_rawnotch):
         # invalid layout
@@ -151,12 +144,14 @@ class TestLayouts(object):
                  [ 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")
+            "1234567890.000000 1.100000e+00 2.200000e+00 3.300000e+00 "
+            "4.400000e+00 5.500000e+00 6.600000e+00 7.700000e+00 "
+            "8.800000e+00\n" +
+            "1234567890.100000 1.100000e+00 2.200000e+00 3.300000e+00 "
+            "4.400000e+00 5.500000e+00 6.600000e+00 7.700000e+00 "
+            "8.800000e+00\n")
 
-        # try RawData too
+        # try uint16_6 too
         formatter = Formatter(name_raw)
         data = [ [ 1234567890.000000, 1, 2, 3, 4, 5, 6 ],
                  [ 1234567890.100000, 1, 2, 3, 4, 5, 6 ] ]
@@ -181,7 +176,7 @@ class TestLayouts(object):
         eq_(text, "")
 
     def test_roundtrip(self):
-        self.real_t_roundtrip("PrepData", "RawData", "RawNotchedData")
+        self.real_t_roundtrip("float32_8", "uint16_6", "uint16_9")
         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
@@ -208,7 +203,7 @@ class TestLayouts(object):
                 eq_(parser1.data, parser2.data)
 
         def datagen():
-            return [ sprintf("%f", random.uniform(-1000,1000))
+            return [ sprintf("%.6e", random.uniform(-1000,1000))
                      for x in range(8) ]
         do_roundtrip(name_prep, datagen)
 
@@ -256,7 +251,7 @@ class TestLayoutSpeed:
 
         print ""
         def datagen():
-            return [ sprintf("%f", random.uniform(-1000,1000))
+            return [ sprintf("%.6e", random.uniform(-1000,1000))
                      for x in range(10) ]
         do_speedtest("float32_10", datagen)
 

tests/test_nilmdb.py

@@ -1,4 +1,4 @@
-import nilmdb
+import nilmdb.server
 
 from nose.tools import *
 from nose.tools import assert_raises
@@ -6,15 +6,13 @@ import distutils.version
 import simplejson as json
 import itertools
 import os
-import shutil
 import sys
-import cherrypy
 import threading
 import urllib2
 from urllib2 import urlopen, HTTPError
-import Queue
 import cStringIO
 import time
+import requests
 
 from nilmdb.utils import serializer_proxy
 
@@ -31,11 +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
@@ -48,29 +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/raw", "RawData")
-        db.stream_create("/newton/zzz/rawnotch", "RawNotchedData")
+        db.stream_create("/newton/prep", "float32_8")
+        db.stream_create("/newton/raw", "uint16_6")
+        db.stream_create("/newton/zzz/rawnotch", "uint16_9")
 
         # Verify we got 3 streams
-        eq_(db.stream_list(), [ ["/newton/prep", "PrepData"],
-                                ["/newton/raw", "RawData"],
-                                ["/newton/zzz/rawnotch", "RawNotchedData"]
+        eq_(db.stream_list(), [ ["/newton/prep", "float32_8"],
+                                ["/newton/raw", "uint16_6"],
+                                ["/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(path="/newton/raw"), [ ["/newton/raw", "RawData"] ])
+        eq_(db.stream_list(layout="uint16_6"), [ ["/newton/raw", "uint16_6"] ])
+        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__:
@@ -106,7 +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()
@@ -115,11 +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",
-                                    port = 32180, stoppable = True)
+        self.server = nilmdb.server.Server(self.db, host = "127.0.0.1",
+                                           port = 32180, stoppable = True)
 
         # Run it
         event = threading.Event()
@@ -147,9 +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.server = nilmdb.Server(self.db, host = "127.0.0.1",
-                                    port = 32180, stoppable = False)
+        self.db = serializer_proxy(nilmdb.server.NilmDB)(testdb)
+        self.server = nilmdb.server.Server(self.db, host = "127.0.0.1",
+                                           port = 32180, stoppable = False)
         self.server.start(blocking = False)
 
     def tearDown(self):
@@ -173,13 +171,13 @@ class TestServer(object):
         streams = getjson("/stream/list")
 
         eq_(streams, [
-            ['/newton/prep', 'PrepData'],
-            ['/newton/raw', 'RawData'],
-            ['/newton/zzz/rawnotch', 'RawNotchedData'],
+            ['/newton/prep', 'float32_8'],
+            ['/newton/raw', 'uint16_6'],
+            ['/newton/zzz/rawnotch', 'uint16_9'],
             ])
 
-        streams = getjson("/stream/list?layout=RawData")
-        eq_(streams, [['/newton/raw', 'RawData']])
+        streams = getjson("/stream/list?layout=uint16_6")
+        eq_(streams, [['/newton/raw', 'uint16_6']])
 
         streams = getjson("/stream/list?layout=NoSuchLayout")
         eq_(streams, [])
@@ -208,3 +206,51 @@ class TestServer(object):
         data = getjson("/stream/get_metadata?path=/newton/prep"
                        "&key=foo")
         eq_(data, {'foo': None})
+
+    def test_cors_headers(self):
+        # Test that CORS headers are being set correctly
+
+        # Normal GET should send simple response
+        url = "http://127.0.0.1:32180/stream/list"
+        r = requests.get(url, headers = { "Origin": "http://google.com/" })
+        eq_(r.status_code, 200)
+        if "access-control-allow-origin" not in r.headers:
+            raise AssertionError("No Access-Control-Allow-Origin (CORS) "
+                                 "header in response:\n", r.headers)
+        eq_(r.headers["access-control-allow-origin"], "http://google.com/")
+
+        # OPTIONS without CORS preflight headers should result in 405
+        r = requests.options(url, headers = {
+            "Origin": "http://google.com/",
+            })
+        eq_(r.status_code, 405)
+
+        # OPTIONS with preflight headers should give preflight response
+        r = requests.options(url, headers = {
+            "Origin": "http://google.com/",
+            "Access-Control-Request-Method": "POST",
+            "Access-Control-Request-Headers": "X-Custom",
+            })
+        eq_(r.status_code, 200)
+        if "access-control-allow-origin" not in r.headers:
+            raise AssertionError("No Access-Control-Allow-Origin (CORS) "
+                                 "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

@@ -83,10 +83,3 @@ 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)))