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author | Erik Johnston <erikj@jki.re> | 2017-01-12 14:25:51 +0000 |
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committer | GitHub <noreply@github.com> | 2017-01-12 14:25:51 +0000 |
commit | 7a13fe16f7def498d4278be51639964d02dbf51e (patch) | |
tree | f269fe2896662fbfcbcdc9f9d7f1124bb8bf5a31 /synapse/util/debug.py | |
parent | Add missing None check (diff) | |
parent | Remove full_twisted_stacktraces option (diff) | |
download | synapse-7a13fe16f7def498d4278be51639964d02dbf51e.tar.xz |
Merge pull request #1802 from matrix-org/erikj/remove_debug_deferreds
Remove full_twisted_stacktraces option
Diffstat (limited to 'synapse/util/debug.py')
-rw-r--r-- | synapse/util/debug.py | 71 |
1 files changed, 0 insertions, 71 deletions
diff --git a/synapse/util/debug.py b/synapse/util/debug.py deleted file mode 100644 index dc49162e6a..0000000000 --- a/synapse/util/debug.py +++ /dev/null @@ -1,71 +0,0 @@ -# -*- coding: utf-8 -*- -# Copyright 2015, 2016 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 twisted.internet import defer, reactor -from functools import wraps -from synapse.util.logcontext import LoggingContext, PreserveLoggingContext - - -def debug_deferreds(): - """Cause all deferreds to wait for a reactor tick before running their - callbacks. This increases the chance of getting a stack trace out of - a defer.inlineCallback since the code waiting on the deferred will get - a chance to add an errback before the deferred runs.""" - - # Helper method for retrieving and restoring the current logging context - # around a callback. - def with_logging_context(fn): - context = LoggingContext.current_context() - - def restore_context_callback(x): - with PreserveLoggingContext(context): - return fn(x) - - return restore_context_callback - - # We are going to modify the __init__ method of defer.Deferred so we - # need to get a copy of the old method so we can still call it. - old__init__ = defer.Deferred.__init__ - - # We need to create a deferred to bounce the callbacks through the reactor - # but we don't want to add a callback when we create that deferred so we - # we create a new type of deferred that uses the old __init__ method. - # This is safe as long as the old __init__ method doesn't invoke an - # __init__ using super. - class Bouncer(defer.Deferred): - __init__ = old__init__ - - # We'll add this as a callback to all Deferreds. Twisted will wait until - # the bouncer deferred resolves before calling the callbacks of the - # original deferred. - def bounce_callback(x): - bouncer = Bouncer() - reactor.callLater(0, with_logging_context(bouncer.callback), x) - return bouncer - - # We'll add this as an errback to all Deferreds. Twisted will wait until - # the bouncer deferred resolves before calling the errbacks of the - # original deferred. - def bounce_errback(x): - bouncer = Bouncer() - reactor.callLater(0, with_logging_context(bouncer.errback), x) - return bouncer - - @wraps(old__init__) - def new__init__(self, *args, **kargs): - old__init__(self, *args, **kargs) - self.addCallbacks(bounce_callback, bounce_errback) - - defer.Deferred.__init__ = new__init__ |