[web] remove PropertySheet._cache
Instead of remembering that a css file has been processed, we re-process it at
every request. This prevents our cache getting out of date with the file
system. Closes #6893185
While we're at it, write the file atomically so that we don't risk serving
partial data.
# copyright 2015 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of CubicWeb.
#
# CubicWeb is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
#
# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with CubicWeb. If not, see <http://www.gnu.org/licenses/>.
"""Simple statsd_ logger for cubicweb.
This module is meant to be configured by setting a couple of global variables:
- ``bucket`` global variable will be used as statsd bucket in every
statsd_ UDP sent packet.
`- `address`` is a pair (IP, port) specifying the address of the
statsd_ server
There are 3 kinds of statds_ message::
- ``statsd_c(context, n)`` is a simple function to send statsd_
counter-type of messages like::
<bucket>.<context>:<n>|c\n
- ``statsd_g(context, value)`` to send statsd_ gauge-type of messages
like::
<bucket>.<context>:<n>|g\n
- ``statsd_t(context, ms)`` to send statsd_ time-type of messages
like::
<bucket>.<context>:<ms>|ms\n
There is also a decorator (``statsd_timeit``) that may be used to
measure and send to the statsd_ server the time passed in a function
or a method and the number of calls. It will send a message like::
<bucket>.<funcname>:<ms>|ms\n<bucket>.<funcname>:1|c\n
.. _statsd: https://github.com/etsy/statsd
"""
__docformat__ = "restructuredtext en"
import time
import socket
_bucket = 'cubicweb'
_address = None
_socket = None
def setup(bucket, address):
"""Configure the statsd endpoint
:param bucket: the name of the statsd bucket that will be used to
build messages.
:param address: the UDP endpoint of the statsd server. Must a
couple (ip, port).
"""
global _bucket, _address, _socket
packed = None
for family in (socket.AF_INET6, socket.AF_INET):
try:
packed = socket.inet_pton(family, address[0])
break
except socket.error:
continue
if packed is None:
return
_bucket, _address = bucket, address
_socket = socket.socket(family, socket.SOCK_DGRAM)
def statsd_c(context, n=1):
if _address is not None:
_socket.sendto('{0}.{1}:{2}|c\n'.format(_bucket, context, n), _address)
def statsd_g(context, value):
if _address is not None:
_socket.sendto('{0}.{1}:{2}|g\n'.format(_bucket, context, value), _address)
def statsd_t(context, value):
if _address is not None:
_socket.sendto('{0}.{1}:{2:.4f}|ms\n'.format(_bucket, context, value), _address)
class statsd_timeit(object):
__slots__ = ('callable',)
def __init__(self, callableobj):
self.callable = callableobj
@property
def __doc__(self):
return self.callable.__doc__
@property
def __name__(self):
return self.callable.__name__
def __call__(self, *args, **kw):
if _address is None:
return self.callable(*args, **kw)
t0 = time.time()
try:
return self.callable(*args, **kw)
finally:
dt = 1000*(time.time()-t0)
msg = '{0}.{1}:{2:.4f}|ms\n{0}.{1}:1|c\n'.format(_bucket, self.__name__, dt)
_socket.sendto(msg, _address)
def __get__(self, obj, objtype):
"""Support instance methods."""
if obj is None: # class method or some already wrapped method
return self
import functools
return functools.partial(self.__call__, obj)