mirror of https://github.com/watcha-fr/synapse
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
147 lines
3.7 KiB
147 lines
3.7 KiB
# -*- coding: utf-8 -*-
|
|
# Copyright 2014, 2015 OpenMarket Ltd
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
from synapse.util.logcontext import LoggingContext, PreserveLoggingContext
|
|
|
|
from twisted.internet import defer, reactor, task
|
|
|
|
import time
|
|
import logging
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
def unwrapFirstError(failure):
|
|
# defer.gatherResults and DeferredLists wrap failures.
|
|
failure.trap(defer.FirstError)
|
|
return failure.value.subFailure
|
|
|
|
|
|
def unwrap_deferred(d):
|
|
"""Given a deferred that we know has completed, return its value or raise
|
|
the failure as an exception
|
|
"""
|
|
if not d.called:
|
|
raise RuntimeError("deferred has not finished")
|
|
|
|
res = []
|
|
|
|
def f(r):
|
|
res.append(r)
|
|
return r
|
|
d.addCallback(f)
|
|
|
|
if res:
|
|
return res[0]
|
|
|
|
def f(r):
|
|
res.append(r)
|
|
return r
|
|
d.addErrback(f)
|
|
|
|
if res:
|
|
res[0].raiseException()
|
|
else:
|
|
raise RuntimeError("deferred did not call callbacks")
|
|
|
|
|
|
class Clock(object):
|
|
"""A small utility that obtains current time-of-day so that time may be
|
|
mocked during unit-tests.
|
|
|
|
TODO(paul): Also move the sleep() functionallity into it
|
|
"""
|
|
|
|
def time(self):
|
|
"""Returns the current system time in seconds since epoch."""
|
|
return time.time()
|
|
|
|
def time_msec(self):
|
|
"""Returns the current system time in miliseconds since epoch."""
|
|
return self.time() * 1000
|
|
|
|
def looping_call(self, f, msec):
|
|
l = task.LoopingCall(f)
|
|
l.start(msec/1000.0, now=False)
|
|
return l
|
|
|
|
def stop_looping_call(self, loop):
|
|
loop.stop()
|
|
|
|
def call_later(self, delay, callback, *args, **kwargs):
|
|
current_context = LoggingContext.current_context()
|
|
|
|
def wrapped_callback(*args, **kwargs):
|
|
with PreserveLoggingContext():
|
|
LoggingContext.thread_local.current_context = current_context
|
|
callback(*args, **kwargs)
|
|
|
|
with PreserveLoggingContext():
|
|
return reactor.callLater(delay, wrapped_callback, *args, **kwargs)
|
|
|
|
def cancel_call_later(self, timer, ignore_errs=False):
|
|
try:
|
|
timer.cancel()
|
|
except:
|
|
if not ignore_errs:
|
|
raise
|
|
|
|
def time_bound_deferred(self, given_deferred, time_out):
|
|
if given_deferred.called:
|
|
return given_deferred
|
|
|
|
ret_deferred = defer.Deferred()
|
|
|
|
def timed_out_fn():
|
|
try:
|
|
ret_deferred.errback(RuntimeError("Timed out"))
|
|
except:
|
|
pass
|
|
|
|
try:
|
|
given_deferred.cancel()
|
|
except:
|
|
pass
|
|
|
|
timer = None
|
|
|
|
def cancel(res):
|
|
try:
|
|
self.cancel_call_later(timer)
|
|
except:
|
|
pass
|
|
return res
|
|
|
|
ret_deferred.addBoth(cancel)
|
|
|
|
def sucess(res):
|
|
try:
|
|
ret_deferred.callback(res)
|
|
except:
|
|
pass
|
|
|
|
return res
|
|
|
|
def err(res):
|
|
try:
|
|
ret_deferred.errback(res)
|
|
except:
|
|
pass
|
|
|
|
given_deferred.addCallbacks(callback=sucess, errback=err)
|
|
|
|
timer = self.call_later(time_out, timed_out_fn)
|
|
|
|
return ret_deferred
|
|
|