mirror of
https://github.com/element-hq/synapse.git
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91 lines
3.2 KiB
Python
91 lines
3.2 KiB
Python
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# -*- coding: utf-8 -*-
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# Copyright 2018 New Vector Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from __future__ import print_function
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import functools
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import sys
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from twisted.internet import defer
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from twisted.internet.defer import Deferred
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from twisted.python.failure import Failure
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def do_patch():
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"""
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Patch defer.inlineCallbacks so that it checks the state of the logcontext on exit
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"""
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from synapse.util.logcontext import LoggingContext
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orig_inline_callbacks = defer.inlineCallbacks
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def new_inline_callbacks(f):
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orig = orig_inline_callbacks(f)
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@functools.wraps(f)
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def wrapped(*args, **kwargs):
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start_context = LoggingContext.current_context()
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try:
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res = orig(*args, **kwargs)
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except Exception:
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if LoggingContext.current_context() != start_context:
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err = "%s changed context from %s to %s on exception" % (
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f, start_context, LoggingContext.current_context()
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)
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print(err, file=sys.stderr)
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raise Exception(err)
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raise
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if not isinstance(res, Deferred) or res.called:
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if LoggingContext.current_context() != start_context:
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err = "%s changed context from %s to %s" % (
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f, start_context, LoggingContext.current_context()
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)
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# print the error to stderr because otherwise all we
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# see in travis-ci is the 500 error
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print(err, file=sys.stderr)
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raise Exception(err)
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return res
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if LoggingContext.current_context() != LoggingContext.sentinel:
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err = (
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"%s returned incomplete deferred in non-sentinel context "
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"%s (start was %s)"
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) % (
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f, LoggingContext.current_context(), start_context,
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)
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print(err, file=sys.stderr)
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raise Exception(err)
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def check_ctx(r):
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if LoggingContext.current_context() != start_context:
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err = "%s completion of %s changed context from %s to %s" % (
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"Failure" if isinstance(r, Failure) else "Success",
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f, start_context, LoggingContext.current_context(),
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)
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print(err, file=sys.stderr)
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raise Exception(err)
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return r
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res.addBoth(check_ctx)
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return res
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return wrapped
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defer.inlineCallbacks = new_inline_callbacks
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