From ee5aef6c72575045fc441076b29b0c06eb46a28c Mon Sep 17 00:00:00 2001 From: Erik Johnston Date: Thu, 7 Apr 2016 15:29:34 +0100 Subject: [PATCH] Log contexts and squash things together --- synapse/util/async.py | 32 +++++++++++++++----------------- 1 file changed, 15 insertions(+), 17 deletions(-) diff --git a/synapse/util/async.py b/synapse/util/async.py index 14a3dfd43..072b6362b 100644 --- a/synapse/util/async.py +++ b/synapse/util/async.py @@ -16,7 +16,9 @@ from twisted.internet import defer, reactor -from .logcontext import PreserveLoggingContext, preserve_fn +from .logcontext import ( + PreserveLoggingContext, preserve_fn, preserve_context_over_deferred, +) from synapse.util import unwrapFirstError from contextlib import contextmanager @@ -141,14 +143,6 @@ def concurrently_execute(func, args, limit): ], consumeErrors=True).addErrback(unwrapFirstError) -@contextmanager -def _trigger_defer_manager(d): - try: - yield - finally: - d.callback(None) - - class Linearizer(object): """Linearizes access to resources based on a key. Useful to ensure only one thing is happening at a time on a given resource. @@ -177,13 +171,17 @@ class Linearizer(object): new_defer = defer.Deferred() self.key_to_defer[key] = new_defer - def remove_if_current(_): - d = self.key_to_defer.get(key) - if d is new_defer: - self.key_to_defer.pop(key, None) + if current_defer: + yield preserve_context_over_deferred(current_defer) - new_defer.addBoth(remove_if_current) + @contextmanager + def _ctx_manager(d): + try: + yield + finally: + d.callback(None) + d = self.key_to_defer.get(key) + if d is new_defer: + self.key_to_defer.pop(key, None) - yield current_defer - - defer.returnValue(_trigger_defer_manager(new_defer)) + defer.returnValue(_ctx_manager(new_defer))