synapse-old/synapse/logging/scopecontextmanager.py

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Add basic opentracing support (#5544) * Configure and initialise tracer Includes config options for the tracer and sets up JaegerClient. * Scope manager using LogContexts We piggy-back our tracer scopes by using log context. The current log context gives us the current scope. If new scope is created we create a stack of scopes in the context. * jaeger is a dependency now * Carrier inject and extraction for Twisted Headers * Trace federation requests on the way in and out. The span is created in _started_processing and closed in _finished_processing because we need a meaningful log context. * Create logcontext for new scope. Instead of having a stack of scopes in a logcontext we create a new context for a new scope if the current logcontext already has a scope. * Remove scope from logcontext if logcontext is top level * Disable tracer if not configured * typo * Remove dependence on jaeger internals * bools * Set service name * :Explicitely state that the tracer is disabled * Black is the new black * Newsfile * Code style * Use the new config setup. * Generate config. * Copyright * Rename config to opentracing * Remove user whitelisting * Empty whitelist by default * User ConfigError instead of RuntimeError * Use isinstance * Use tag constants for opentracing. * Remove debug comment and no need to explicitely record error * Two errors a "s(c)entry" * Docstrings! * Remove debugging brainslip * Homeserver Whitlisting * Better opentracing config comment * linting * Inclue worker name in service_name * Make opentracing an optional dependency * Neater config retreival * Clean up dummy tags * Instantiate tracing as object instead of global class * Inlcude opentracing as a homeserver member. * Thread opentracing to the request level * Reference opetnracing through hs * Instantiate dummy opentracin g for tests. * About to revert, just keeping the unfinished changes just in case * Revert back to global state, commit number: 9ce4a3d9067bf9889b86c360c05ac88618b85c4f * Use class level methods in tracerutils * Start and stop requests spans in a place where we have access to the authenticated entity * Seen it, isort it * Make sure to close the active span. * I'm getting black and blue from this. * Logger formatting Co-Authored-By: Erik Johnston <erik@matrix.org> * Outdated comment * Import opentracing at the top * Return a contextmanager * Start tracing client requests from the servlet * Return noop context manager if not tracing * Explicitely say that these are federation requests * Include servlet name in client requests * Use context manager * Move opentracing to logging/ * Seen it, isort it again! * Ignore twisted return exceptions on context exit * Escape the scope * Scopes should be entered to make them useful. * Nicer decorator names * Just one init, init? * Don't need to close something that isn't open * Docs make you smarter
2019-07-11 03:36:03 -06:00
# -*- coding: utf-8 -*-
# Copyright 2019 The Matrix.org Foundation C.I.C.
#
# 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.import logging
import logging
from opentracing import Scope, ScopeManager
import twisted
from synapse.logging.context import LoggingContext, nested_logging_context
logger = logging.getLogger(__name__)
class LogContextScopeManager(ScopeManager):
"""
The LogContextScopeManager tracks the active scope in opentracing
by using the log contexts which are native to synapse. This is so
that the basic opentracing api can be used across twisted defereds.
(I would love to break logcontexts and this into an OS package. but
let's wait for twisted's contexts to be released.)
"""
def __init__(self, config):
pass
Add basic opentracing support (#5544) * Configure and initialise tracer Includes config options for the tracer and sets up JaegerClient. * Scope manager using LogContexts We piggy-back our tracer scopes by using log context. The current log context gives us the current scope. If new scope is created we create a stack of scopes in the context. * jaeger is a dependency now * Carrier inject and extraction for Twisted Headers * Trace federation requests on the way in and out. The span is created in _started_processing and closed in _finished_processing because we need a meaningful log context. * Create logcontext for new scope. Instead of having a stack of scopes in a logcontext we create a new context for a new scope if the current logcontext already has a scope. * Remove scope from logcontext if logcontext is top level * Disable tracer if not configured * typo * Remove dependence on jaeger internals * bools * Set service name * :Explicitely state that the tracer is disabled * Black is the new black * Newsfile * Code style * Use the new config setup. * Generate config. * Copyright * Rename config to opentracing * Remove user whitelisting * Empty whitelist by default * User ConfigError instead of RuntimeError * Use isinstance * Use tag constants for opentracing. * Remove debug comment and no need to explicitely record error * Two errors a "s(c)entry" * Docstrings! * Remove debugging brainslip * Homeserver Whitlisting * Better opentracing config comment * linting * Inclue worker name in service_name * Make opentracing an optional dependency * Neater config retreival * Clean up dummy tags * Instantiate tracing as object instead of global class * Inlcude opentracing as a homeserver member. * Thread opentracing to the request level * Reference opetnracing through hs * Instantiate dummy opentracin g for tests. * About to revert, just keeping the unfinished changes just in case * Revert back to global state, commit number: 9ce4a3d9067bf9889b86c360c05ac88618b85c4f * Use class level methods in tracerutils * Start and stop requests spans in a place where we have access to the authenticated entity * Seen it, isort it * Make sure to close the active span. * I'm getting black and blue from this. * Logger formatting Co-Authored-By: Erik Johnston <erik@matrix.org> * Outdated comment * Import opentracing at the top * Return a contextmanager * Start tracing client requests from the servlet * Return noop context manager if not tracing * Explicitely say that these are federation requests * Include servlet name in client requests * Use context manager * Move opentracing to logging/ * Seen it, isort it again! * Ignore twisted return exceptions on context exit * Escape the scope * Scopes should be entered to make them useful. * Nicer decorator names * Just one init, init? * Don't need to close something that isn't open * Docs make you smarter
2019-07-11 03:36:03 -06:00
@property
def active(self):
"""
Returns the currently active Scope which can be used to access the
currently active Scope.span.
If there is a non-null Scope, its wrapped Span
becomes an implicit parent of any newly-created Span at
Tracer.start_active_span() time.
Return:
(Scope) : the Scope that is active, or None if not
available.
"""
ctx = LoggingContext.current_context()
if ctx is LoggingContext.sentinel:
return None
else:
return ctx.scope
def activate(self, span, finish_on_close):
"""
Makes a Span active.
Args
span (Span): the span that should become active.
finish_on_close (Boolean): whether Span should be automatically
finished when Scope.close() is called.
Returns:
Scope to control the end of the active period for
*span*. It is a programming error to neglect to call
Scope.close() on the returned instance.
"""
enter_logcontext = False
ctx = LoggingContext.current_context()
if ctx is LoggingContext.sentinel:
# We don't want this scope to affect.
logger.error("Tried to activate scope outside of loggingcontext")
return Scope(None, span)
elif ctx.scope is not None:
# We want the logging scope to look exactly the same so we give it
# a blank suffix
ctx = nested_logging_context("")
enter_logcontext = True
scope = _LogContextScope(self, span, ctx, enter_logcontext, finish_on_close)
ctx.scope = scope
return scope
class _LogContextScope(Scope):
"""
A custom opentracing scope. The only significant difference is that it will
close the log context it's related to if the logcontext was created specifically
for this scope.
"""
def __init__(self, manager, span, logcontext, enter_logcontext, finish_on_close):
"""
Args:
manager (LogContextScopeManager):
the manager that is responsible for this scope.
span (Span):
the opentracing span which this scope represents the local
lifetime for.
logcontext (LogContext):
the logcontext to which this scope is attached.
enter_logcontext (Boolean):
if True the logcontext will be entered and exited when the scope
is entered and exited respectively
finish_on_close (Boolean):
if True finish the span when the scope is closed
"""
super(_LogContextScope, self).__init__(manager, span)
self.logcontext = logcontext
self._finish_on_close = finish_on_close
self._enter_logcontext = enter_logcontext
def __enter__(self):
if self._enter_logcontext:
self.logcontext.__enter__()
def __exit__(self, type, value, traceback):
if type == twisted.internet.defer._DefGen_Return:
super(_LogContextScope, self).__exit__(None, None, None)
else:
super(_LogContextScope, self).__exit__(type, value, traceback)
if self._enter_logcontext:
self.logcontext.__exit__(type, value, traceback)
else: # the logcontext existed before the creation of the scope
self.logcontext.scope = None
def close(self):
if self.manager.active is not self:
logger.error("Tried to close a non-active scope!")
Add basic opentracing support (#5544) * Configure and initialise tracer Includes config options for the tracer and sets up JaegerClient. * Scope manager using LogContexts We piggy-back our tracer scopes by using log context. The current log context gives us the current scope. If new scope is created we create a stack of scopes in the context. * jaeger is a dependency now * Carrier inject and extraction for Twisted Headers * Trace federation requests on the way in and out. The span is created in _started_processing and closed in _finished_processing because we need a meaningful log context. * Create logcontext for new scope. Instead of having a stack of scopes in a logcontext we create a new context for a new scope if the current logcontext already has a scope. * Remove scope from logcontext if logcontext is top level * Disable tracer if not configured * typo * Remove dependence on jaeger internals * bools * Set service name * :Explicitely state that the tracer is disabled * Black is the new black * Newsfile * Code style * Use the new config setup. * Generate config. * Copyright * Rename config to opentracing * Remove user whitelisting * Empty whitelist by default * User ConfigError instead of RuntimeError * Use isinstance * Use tag constants for opentracing. * Remove debug comment and no need to explicitely record error * Two errors a "s(c)entry" * Docstrings! * Remove debugging brainslip * Homeserver Whitlisting * Better opentracing config comment * linting * Inclue worker name in service_name * Make opentracing an optional dependency * Neater config retreival * Clean up dummy tags * Instantiate tracing as object instead of global class * Inlcude opentracing as a homeserver member. * Thread opentracing to the request level * Reference opetnracing through hs * Instantiate dummy opentracin g for tests. * About to revert, just keeping the unfinished changes just in case * Revert back to global state, commit number: 9ce4a3d9067bf9889b86c360c05ac88618b85c4f * Use class level methods in tracerutils * Start and stop requests spans in a place where we have access to the authenticated entity * Seen it, isort it * Make sure to close the active span. * I'm getting black and blue from this. * Logger formatting Co-Authored-By: Erik Johnston <erik@matrix.org> * Outdated comment * Import opentracing at the top * Return a contextmanager * Start tracing client requests from the servlet * Return noop context manager if not tracing * Explicitely say that these are federation requests * Include servlet name in client requests * Use context manager * Move opentracing to logging/ * Seen it, isort it again! * Ignore twisted return exceptions on context exit * Escape the scope * Scopes should be entered to make them useful. * Nicer decorator names * Just one init, init? * Don't need to close something that isn't open * Docs make you smarter
2019-07-11 03:36:03 -06:00
return
if self._finish_on_close:
self.span.finish()