author | Julien Cristau <julien.cristau@logilab.fr> |
Mon, 09 Nov 2015 17:08:21 +0100 | |
changeset 10882 | 634cc266e48f |
parent 10650 | 28b3d39bcbc6 |
permissions | -rw-r--r-- |
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# copyright 2015 LOGILAB S.A. (Paris, FRANCE), all rights reserved. |
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr |
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# |
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# This file is part of CubicWeb. |
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# |
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# CubicWeb is free software: you can redistribute it and/or modify it under the |
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# terms of the GNU Lesser General Public License as published by the Free |
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# Software Foundation, either version 2.1 of the License, or (at your option) |
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# any later version. |
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# |
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# CubicWeb is distributed in the hope that it will be useful, but WITHOUT |
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more |
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# details. |
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# |
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# You should have received a copy of the GNU Lesser General Public License along |
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# with CubicWeb. If not, see <http://www.gnu.org/licenses/>. |
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"""Simple statsd_ logger for cubicweb. |
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This module is meant to be configured by setting a couple of global variables: |
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- ``bucket`` global variable will be used as statsd bucket in every |
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statsd_ UDP sent packet. |
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`- `address`` is a pair (IP, port) specifying the address of the |
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statsd_ server |
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There are 3 kinds of statds_ message:: |
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- ``statsd_c(context, n)`` is a simple function to send statsd_ |
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counter-type of messages like:: |
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<bucket>.<context>:<n>|c\n |
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- ``statsd_g(context, value)`` to send statsd_ gauge-type of messages |
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like:: |
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<bucket>.<context>:<n>|g\n |
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- ``statsd_t(context, ms)`` to send statsd_ time-type of messages |
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like:: |
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<bucket>.<context>:<ms>|ms\n |
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There is also a decorator (``statsd_timeit``) that may be used to |
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measure and send to the statsd_ server the time passed in a function |
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or a method and the number of calls. It will send a message like:: |
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<bucket>.<funcname>:<ms>|ms\n<bucket>.<funcname>:1|c\n |
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.. _statsd: https://github.com/etsy/statsd |
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""" |
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__docformat__ = "restructuredtext en" |
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import time |
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import socket |
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_bucket = 'cubicweb' |
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_address = None |
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_socket = None |
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def setup(bucket, address): |
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"""Configure the statsd endpoint |
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:param bucket: the name of the statsd bucket that will be used to |
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build messages. |
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:param address: the UDP endpoint of the statsd server. Must a |
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couple (ip, port). |
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""" |
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global _bucket, _address, _socket |
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packed = None |
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for family in (socket.AF_INET6, socket.AF_INET): |
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try: |
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packed = socket.inet_pton(family, address[0]) |
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break |
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except socket.error: |
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continue |
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if packed is None: |
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return |
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_bucket, _address = bucket, address |
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_socket = socket.socket(family, socket.SOCK_DGRAM) |
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def statsd_c(context, n=1): |
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if _address is not None: |
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_socket.sendto('{0}.{1}:{2}|c\n'.format(_bucket, context, n), _address) |
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def statsd_g(context, value): |
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if _address is not None: |
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_socket.sendto('{0}.{1}:{2}|g\n'.format(_bucket, context, value), _address) |
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def statsd_t(context, value): |
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if _address is not None: |
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_socket.sendto('{0}.{1}:{2:.4f}|ms\n'.format(_bucket, context, value), _address) |
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class statsd_timeit(object): |
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__slots__ = ('callable',) |
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def __init__(self, callableobj): |
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self.callable = callableobj |
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@property |
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def __doc__(self): |
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return self.callable.__doc__ |
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@property |
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def __name__(self): |
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return self.callable.__name__ |
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118 |
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def __call__(self, *args, **kw): |
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if _address is None: |
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return self.callable(*args, **kw) |
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t0 = time.time() |
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try: |
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return self.callable(*args, **kw) |
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finally: |
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dt = 1000*(time.time()-t0) |
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msg = '{0}.{1}:{2:.4f}|ms\n{0}.{1}:1|c\n'.format(_bucket, self.__name__, dt) |
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_socket.sendto(msg, _address) |
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def __get__(self, obj, objtype): |
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"""Support instance methods.""" |
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if obj is None: # class method or some already wrapped method |
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return self |
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import functools |
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return functools.partial(self.__call__, obj) |