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Merge pull request #144 from matrix-org/erikj/logging_context 

Preserving logging contexts
This commit is contained in:
Mark Haines 2015-05-12 15:23:50 +01:00
parent 1fce36b111 8022b27fc2
commit a6fb2aa2a5
21 changed files with 236 additions and 153 deletions
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1
demo/start.sh
View File

@ -31,6 +31,7 @@ for port in 8080 8081 8082; do
#rm $DIR/etc/$port.config
python -m synapse.app.homeserver \
--generate-config \
--enable_registration \
-H "localhost:$https_port" \
--config-path "$DIR/etc/$port.config" \

13
synapse/crypto/keyclient.py
View File

@ -18,7 +18,9 @@ from twisted.web.http import HTTPClient
from twisted.internet.protocol import Factory
from twisted.internet import defer, reactor
from synapse.http.endpoint import matrix_federation_endpoint
from synapse.util.logcontext import PreserveLoggingContext
from synapse.util.logcontext import (
preserve_context_over_fn, preserve_context_over_deferred
)
import simplejson as json
import logging
@ -40,9 +42,12 @@ def fetch_server_key(server_name, ssl_context_factory, path=KEY_API_V1):
for i in range(5):
try:
with PreserveLoggingContext():
protocol = yield endpoint.connect(factory)
server_response, server_certificate = yield protocol.remote_key
protocol = yield preserve_context_over_fn(
endpoint.connect, factory
)
server_response, server_certificate = yield preserve_context_over_deferred(
protocol.remote_key
)
defer.returnValue((server_response, server_certificate))
return
except SynapseKeyClientError as e:

4
synapse/federation/federation_base.py
View File

@ -24,6 +24,8 @@ from synapse.crypto.event_signing import check_event_content_hash
from synapse.api.errors import SynapseError
from synapse.util import unwrapFirstError
import logging
@ -94,7 +96,7 @@ class FederationBase(object):
yield defer.gatherResults(
[do(pdu) for pdu in pdus],
consumeErrors=True
)
).addErrback(unwrapFirstError)
defer.returnValue(signed_pdus)

2
synapse/federation/federation_server.py
View File

@ -20,7 +20,6 @@ from .federation_base import FederationBase
from .units import Transaction, Edu
from synapse.util.logutils import log_function
from synapse.util.logcontext import PreserveLoggingContext
from synapse.events import FrozenEvent
import synapse.metrics
@ -123,7 +122,6 @@ class FederationServer(FederationBase):
logger.debug("[%s] Transaction is new", transaction.transaction_id)
with PreserveLoggingContext():
results = []
for pdu in pdu_list:

3
synapse/handlers/_base.py
View File

@ -20,6 +20,8 @@ from synapse.crypto.event_signing import add_hashes_and_signatures
from synapse.api.constants import Membership, EventTypes
from synapse.types import UserID
from synapse.util.logcontext import PreserveLoggingContext
import logging
@ -137,6 +139,7 @@ class BaseHandler(object):
"Failed to get destination from event %s", s.event_id
)
with PreserveLoggingContext():
# Don't block waiting on waking up all the listeners.
notify_d = self.notifier.on_new_room_event(
event, extra_users=extra_users

2
synapse/handlers/events.py
View File

@ -15,7 +15,6 @@
from twisted.internet import defer
from synapse.util.logcontext import PreserveLoggingContext
from synapse.util.logutils import log_function
from synapse.types import UserID
from synapse.events.utils import serialize_event
@ -81,7 +80,6 @@ class EventStreamHandler(BaseHandler):
# thundering herds on restart.
timeout = random.randint(int(timeout*0.9), int(timeout*1.1))
with PreserveLoggingContext():
events, tokens = yield self.notifier.get_events_for(
auth_user, room_ids, pagin_config, timeout
)

8
synapse/handlers/federation.py
View File

@ -21,6 +21,8 @@ from synapse.api.errors import (
AuthError, FederationError, StoreError, CodeMessageException, SynapseError,
)
from synapse.api.constants import EventTypes, Membership, RejectedReason
from synapse.util import unwrapFirstError
from synapse.util.logcontext import PreserveLoggingContext
from synapse.util.logutils import log_function
from synapse.util.async import run_on_reactor
from synapse.util.frozenutils import unfreeze
@ -199,6 +201,7 @@ class FederationHandler(BaseHandler):
target_user = UserID.from_string(target_user_id)
extra_users.append(target_user)
with PreserveLoggingContext():
d = self.notifier.on_new_room_event(
event, extra_users=extra_users
)
@ -566,6 +569,7 @@ class FederationHandler(BaseHandler):
auth_events=auth_events,
)
with PreserveLoggingContext():
d = self.notifier.on_new_room_event(
new_event, extra_users=[joinee]
)
@ -647,6 +651,7 @@ class FederationHandler(BaseHandler):
target_user = UserID.from_string(target_user_id)
extra_users.append(target_user)
with PreserveLoggingContext():
d = self.notifier.on_new_room_event(
event, extra_users=extra_users
)
@ -729,6 +734,7 @@ class FederationHandler(BaseHandler):
)
target_user = UserID.from_string(event.state_key)
with PreserveLoggingContext():
d = self.notifier.on_new_room_event(
event, extra_users=[target_user],
)
@ -1056,7 +1062,7 @@ class FederationHandler(BaseHandler):
if d in have_events and not have_events[d]
],
consumeErrors=True
)
).addErrback(unwrapFirstError)
if different_events:
local_view = dict(auth_events)

5
synapse/handlers/message.py
View File

@ -20,6 +20,7 @@ from synapse.api.errors import RoomError, SynapseError
from synapse.streams.config import PaginationConfig
from synapse.events.utils import serialize_event
from synapse.events.validator import EventValidator
from synapse.util import unwrapFirstError
from synapse.util.logcontext import PreserveLoggingContext
from synapse.types import UserID, RoomStreamToken
@ -313,7 +314,7 @@ class MessageHandler(BaseHandler):
event.room_id
),
]
)
).addErrback(unwrapFirstError)
start_token = now_token.copy_and_replace("room_key", token[0])
end_token = now_token.copy_and_replace("room_key", token[1])
@ -338,7 +339,7 @@ class MessageHandler(BaseHandler):
yield defer.gatherResults(
[handle_room(e) for e in room_list],
consumeErrors=True
)
).addErrback(unwrapFirstError)
ret = {
"rooms": rooms_ret,

8
synapse/handlers/presence.py
View File

@ -18,8 +18,8 @@ from twisted.internet import defer
from synapse.api.errors import SynapseError, AuthError
from synapse.api.constants import PresenceState
from synapse.util.logutils import log_function
from synapse.util.logcontext import PreserveLoggingContext
from synapse.util.logutils import log_function
from synapse.types import UserID
import synapse.metrics
@ -278,7 +278,6 @@ class PresenceHandler(BaseHandler):
now_online = state["presence"] != PresenceState.OFFLINE
was_polling = target_user in self._user_cachemap
with PreserveLoggingContext():
if now_online and not was_polling:
self.start_polling_presence(target_user, state=state)
elif not now_online and was_polling:
@ -408,7 +407,7 @@ class PresenceHandler(BaseHandler):
yield self.store.set_presence_list_accepted(
observer_user.localpart, observed_user.to_string()
)
with PreserveLoggingContext():
self.start_polling_presence(
observer_user, target_user=observed_user
)
@ -430,7 +429,6 @@ class PresenceHandler(BaseHandler):
observer_user.localpart, observed_user.to_string()
)
with PreserveLoggingContext():
self.stop_polling_presence(
observer_user, target_user=observed_user
)
@ -766,7 +764,6 @@ class PresenceHandler(BaseHandler):
if not self._remote_sendmap[user]:
del self._remote_sendmap[user]
with PreserveLoggingContext():
yield defer.DeferredList(deferreds, consumeErrors=True)
@defer.inlineCallbacks
@ -812,6 +809,7 @@ class PresenceHandler(BaseHandler):
def push_update_to_clients(self, observed_user, users_to_push=[],
room_ids=[], statuscache=None):
with PreserveLoggingContext():
self.notifier.on_new_user_event(
users_to_push,
room_ids,

5
synapse/handlers/profile.py
View File

@ -17,8 +17,8 @@ from twisted.internet import defer
from synapse.api.errors import SynapseError, AuthError, CodeMessageException
from synapse.api.constants import EventTypes, Membership
from synapse.util.logcontext import PreserveLoggingContext
from synapse.types import UserID
from synapse.util import unwrapFirstError
from ._base import BaseHandler
@ -154,14 +154,13 @@ class ProfileHandler(BaseHandler):
if not self.hs.is_mine(user):
defer.returnValue(None)
with PreserveLoggingContext():
(displayname, avatar_url) = yield defer.gatherResults(
[
self.store.get_profile_displayname(user.localpart),
self.store.get_profile_avatar_url(user.localpart),
],
consumeErrors=True
)
).addErrback(unwrapFirstError)
state["displayname"] = displayname
state["avatar_url"] = avatar_url

4
synapse/handlers/room.py
View File

@ -21,7 +21,7 @@ from ._base import BaseHandler
from synapse.types import UserID, RoomAlias, RoomID
from synapse.api.constants import EventTypes, Membership, JoinRules
from synapse.api.errors import StoreError, SynapseError
from synapse.util import stringutils
from synapse.util import stringutils, unwrapFirstError
from synapse.util.async import run_on_reactor
from synapse.events.utils import serialize_event
@ -537,7 +537,7 @@ class RoomListHandler(BaseHandler):
for room in chunk
],
consumeErrors=True,
)
).addErrback(unwrapFirstError)
for i, room in enumerate(chunk):
room["num_joined_members"] = len(results[i])

2
synapse/handlers/typing.py
View File

@ -18,6 +18,7 @@ from twisted.internet import defer
from ._base import BaseHandler
from synapse.api.errors import SynapseError, AuthError
from synapse.util.logcontext import PreserveLoggingContext
from synapse.types import UserID
import logging
@ -216,6 +217,7 @@ class TypingNotificationHandler(BaseHandler):
self._latest_room_serial += 1
self._room_serials[room_id] = self._latest_room_serial
with PreserveLoggingContext():
self.notifier.on_new_user_event(rooms=[room_id])

6
synapse/http/client.py
View File

@ -14,6 +14,7 @@
# limitations under the License.
from synapse.api.errors import CodeMessageException
from synapse.util.logcontext import preserve_context_over_fn
from syutil.jsonutil import encode_canonical_json
import synapse.metrics
@ -61,7 +62,10 @@ class SimpleHttpClient(object):
# A small wrapper around self.agent.request() so we can easily attach
# counters to it
outgoing_requests_counter.inc(method)
d = self.agent.request(method, *args, **kwargs)
d = preserve_context_over_fn(
self.agent.request,
method, *args, **kwargs
)
def _cb(response):
incoming_responses_counter.inc(method, response.code)

6
synapse/http/matrixfederationclient.py
View File

@ -22,7 +22,7 @@ from twisted.web._newclient import ResponseDone
from synapse.http.endpoint import matrix_federation_endpoint
from synapse.util.async import sleep
from synapse.util.logcontext import PreserveLoggingContext
from synapse.util.logcontext import preserve_context_over_fn
import synapse.metrics
from syutil.jsonutil import encode_canonical_json
@ -144,8 +144,8 @@ class MatrixFederationHttpClient(object):
producer = body_callback(method, url_bytes, headers_dict)
try:
with PreserveLoggingContext():
request_deferred = self.agent.request(
request_deferred = preserve_context_over_fn(
self.agent.request,
destination,
endpoint,
method,

6
synapse/http/server.py
View File

@ -17,7 +17,7 @@
from synapse.api.errors import (
cs_exception, SynapseError, CodeMessageException, UnrecognizedRequestError
)
from synapse.util.logcontext import LoggingContext
from synapse.util.logcontext import LoggingContext, PreserveLoggingContext
import synapse.metrics
from syutil.jsonutil import (
@ -85,7 +85,9 @@ def request_handler(request_handler):
"Received request: %s %s",
request.method, request.path
)
yield request_handler(self, request)
d = request_handler(self, request)
with PreserveLoggingContext():
yield d
code = request.code
except CodeMessageException as e:
code = e.code

3
synapse/notifier.py
View File

@ -16,7 +16,6 @@
from twisted.internet import defer
from synapse.util.logutils import log_function
from synapse.util.logcontext import PreserveLoggingContext
from synapse.types import StreamToken
import synapse.metrics
@ -223,7 +222,6 @@ class Notifier(object):
def eb(failure):
logger.exception("Failed to notify listener", failure)
with PreserveLoggingContext():
yield defer.DeferredList(
[notify(l).addErrback(eb) for l in listeners],
consumeErrors=True,
@ -298,7 +296,6 @@ class Notifier(object):
failure.getTracebackObject())
)
with PreserveLoggingContext():
yield defer.DeferredList(
[notify(l).addErrback(eb) for l in listeners],
consumeErrors=True,

7
synapse/storage/_base.py
View File

@ -18,7 +18,7 @@ from synapse.api.errors import StoreError
from synapse.events import FrozenEvent
from synapse.events.utils import prune_event
from synapse.util.logutils import log_function
from synapse.util.logcontext import PreserveLoggingContext, LoggingContext
from synapse.util.logcontext import preserve_context_over_fn, LoggingContext
from synapse.util.lrucache import LruCache
import synapse.metrics
@ -420,10 +420,11 @@ class SQLBaseStore(object):
self._txn_perf_counters.update(desc, start, end)
sql_txn_timer.inc_by(duration, desc)
with PreserveLoggingContext():
result = yield self._db_pool.runWithConnection(
result = yield preserve_context_over_fn(
self._db_pool.runWithConnection,
inner_func, *args, **kwargs
)
for after_callback, after_args in after_callbacks:
after_callback(*after_args)
defer.returnValue(result)

11
synapse/util/__init__.py
View File

@ -13,7 +13,7 @@
# See the License for the specific language governing permissions and
# limitations under the License.
from synapse.util.logcontext import LoggingContext
from synapse.util.logcontext import LoggingContext, PreserveLoggingContext
from twisted.internet import defer, reactor, task
@ -23,6 +23,12 @@ import logging
logger = logging.getLogger(__name__)
def unwrapFirstError(failure):
# defer.gatherResults and DeferredLists wrap failures.
failure.trap(defer.FirstError)
return failure.value.subFailure
class Clock(object):
"""A small utility that obtains current time-of-day so that time may be
mocked during unit-tests.
@ -50,8 +56,11 @@ class Clock(object):
current_context = LoggingContext.current_context()
def wrapped_callback():
with PreserveLoggingContext():
LoggingContext.thread_local.current_context = current_context
callback()
with PreserveLoggingContext():
return reactor.callLater(delay, wrapped_callback)
def cancel_call_later(self, timer):

6
synapse/util/async.py
View File

@ -16,15 +16,13 @@
from twisted.internet import defer, reactor
from .logcontext import PreserveLoggingContext
from .logcontext import preserve_context_over_deferred
@defer.inlineCallbacks
def sleep(seconds):
d = defer.Deferred()
reactor.callLater(seconds, d.callback, seconds)
with PreserveLoggingContext():
yield d
return preserve_context_over_deferred(d)
def run_on_reactor():

35
synapse/util/distributor.py
View File

@ -13,10 +13,14 @@
# See the License for the specific language governing permissions and
# limitations under the License.
from synapse.util.logcontext import PreserveLoggingContext
from twisted.internet import defer
from synapse.util.logcontext import (
PreserveLoggingContext, preserve_context_over_deferred,
)
from synapse.util import unwrapFirstError
import logging
@ -93,7 +97,6 @@ class Signal(object):
Each observer callable may return a Deferred."""
self.observers.append(observer)
@defer.inlineCallbacks
def fire(self, *args, **kwargs):
"""Invokes every callable in the observer list, passing in the args and
kwargs. Exceptions thrown by observers are logged but ignored. It is
@ -101,11 +104,8 @@ class Signal(object):
Returns a Deferred that will complete when all the observers have
completed."""
with PreserveLoggingContext():
deferreds = []
for observer in self.observers:
d = defer.maybeDeferred(observer, *args, **kwargs)
def do(observer):
def eb(failure):
logger.warning(
"%s signal observer %s failed: %r",
@ -115,10 +115,17 @@ class Signal(object):
failure.value,
failure.getTracebackObject()))
if not self.suppress_failures:
failure.raiseException()
deferreds.append(d.addErrback(eb))
results = []
for deferred in deferreds:
result = yield deferred
results.append(result)
defer.returnValue(results)
return failure
return defer.maybeDeferred(observer, *args, **kwargs).addErrback(eb)
with PreserveLoggingContext():
deferreds = [
do(observer)
for observer in self.observers
]
d = defer.gatherResults(deferreds, consumeErrors=True)
d.addErrback(unwrapFirstError)
return preserve_context_over_deferred(d)

52
synapse/util/logcontext.py
View File

@ -12,6 +12,8 @@
# See the License for the specific language governing permissions and
# limitations under the License.
from twisted.internet import defer
import threading
import logging
@ -129,3 +131,53 @@ class PreserveLoggingContext(object):
def __exit__(self, type, value, traceback):
"""Restores the current logging context"""
LoggingContext.thread_local.current_context = self.current_context
if self.current_context is not LoggingContext.sentinel:
if self.current_context.parent_context is None:
logger.warn(
"Restoring dead context: %s",
self.current_context,
)
def preserve_context_over_fn(fn, *args, **kwargs):
"""Takes a function and invokes it with the given arguments, but removes
and restores the current logging context while doing so.
If the result is a deferred, call preserve_context_over_deferred before
returning it.
"""
with PreserveLoggingContext():
res = fn(*args, **kwargs)
if isinstance(res, defer.Deferred):
return preserve_context_over_deferred(res)
else:
return res
def preserve_context_over_deferred(deferred):
"""Given a deferred wrap it such that any callbacks added later to it will
be invoked with the current context.
"""
d = defer.Deferred()
current_context = LoggingContext.current_context()
def cb(res):
with PreserveLoggingContext():
LoggingContext.thread_local.current_context = current_context
res = d.callback(res)
return res
def eb(failure):
with PreserveLoggingContext():
LoggingContext.thread_local.current_context = current_context
res = d.errback(failure)
return res
if deferred.called:
return deferred
deferred.addCallbacks(cb, eb)
return d