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Rename and move the classes

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Richard van der Hoff 2019-03-13 20:02:56 +00:00
parent 5d89a526f1
commit 02e23b36bc
7 changed files with 864 additions and 811 deletions
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synapse/federation/sender/per_destination_queue.py Normal file
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# -*- coding: utf-8 -*-
# Copyright 2014-2016 OpenMarket Ltd
# Copyright 2019 New Vector 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.
import datetime
import logging
from prometheus_client import Counter
from twisted.internet import defer
from synapse.api.errors import (
FederationDeniedError,
HttpResponseException,
RequestSendFailed,
)
from synapse.events import EventBase
from synapse.federation.units import Edu
from synapse.handlers.presence import format_user_presence_state
from synapse.metrics import sent_transactions_counter
from synapse.metrics.background_process_metrics import run_as_background_process
from synapse.storage import UserPresenceState
from synapse.util.retryutils import NotRetryingDestination, get_retry_limiter
logger = logging.getLogger(__name__)
sent_edus_counter = Counter(
"synapse_federation_client_sent_edus",
"Total number of EDUs successfully sent",
)
sent_edus_by_type = Counter(
"synapse_federation_client_sent_edus_by_type",
"Number of sent EDUs successfully sent, by event type",
["type"],
)
class PerDestinationQueue(object):
"""
Manages the per-destination transmission queues.
Args:
hs (synapse.HomeServer):
transaction_sender (TransactionManager):
destination (str): the server_name of the destination that we are managing
transmission for.
"""
def __init__(self, hs, transaction_manager, destination):
self._server_name = hs.hostname
self._clock = hs.get_clock()
self._store = hs.get_datastore()
self._transaction_manager = transaction_manager
self._destination = destination
self.transmission_loop_running = False
# a list of tuples of (pending pdu, order)
self._pending_pdus = [] # type: list[tuple[EventBase, int]]
self._pending_edus = [] # type: list[Edu]
# Pending EDUs by their "key". Keyed EDUs are EDUs that get clobbered
# based on their key (e.g. typing events by room_id)
# Map of (edu_type, key) -> Edu
self._pending_edus_keyed = {} # type: dict[tuple[str, str], Edu]
# Map of user_id -> UserPresenceState of pending presence to be sent to this
# destination
self._pending_presence = {} # type: dict[str, UserPresenceState]
# stream_id of last successfully sent to-device message.
# NB: may be a long or an int.
self._last_device_stream_id = 0
# stream_id of last successfully sent device list update.
self._last_device_list_stream_id = 0
def pending_pdu_count(self):
return len(self._pending_pdus)
def pending_edu_count(self):
return (
len(self._pending_edus)
+ len(self._pending_presence)
+ len(self._pending_edus_keyed)
)
def send_pdu(self, pdu, order):
"""Add a PDU to the queue, and start the transmission loop if neccessary
Args:
pdu (EventBase): pdu to send
order (int):
"""
self._pending_pdus.append((pdu, order))
self.attempt_new_transaction()
def send_presence(self, states):
"""Add presence updates to the queue. Start the transmission loop if neccessary.
Args:
states (iterable[UserPresenceState]): presence to send
"""
self._pending_presence.update({
state.user_id: state for state in states
})
self.attempt_new_transaction()
def send_keyed_edu(self, edu, key):
self._pending_edus_keyed[(edu.edu_type, key)] = edu
self.attempt_new_transaction()
def send_edu(self, edu):
self._pending_edus.append(edu)
self.attempt_new_transaction()
def attempt_new_transaction(self):
"""Try to start a new transaction to this destination
If there is already a transaction in progress to this destination,
returns immediately. Otherwise kicks off the process of sending a
transaction in the background.
"""
# list of (pending_pdu, deferred, order)
if self.transmission_loop_running:
# XXX: this can get stuck on by a never-ending
# request at which point pending_pdus just keeps growing.
# we need application-layer timeouts of some flavour of these
# requests
logger.debug(
"TX [%s] Transaction already in progress",
self._destination
)
return
logger.debug("TX [%s] Starting transaction loop", self._destination)
run_as_background_process(
"federation_transaction_transmission_loop",
self._transaction_transmission_loop,
)
@defer.inlineCallbacks
def _transaction_transmission_loop(self):
pending_pdus = []
try:
self.transmission_loop_running = True
# This will throw if we wouldn't retry. We do this here so we fail
# quickly, but we will later check this again in the http client,
# hence why we throw the result away.
yield get_retry_limiter(self._destination, self._clock, self._store)
pending_pdus = []
while True:
device_message_edus, device_stream_id, dev_list_id = (
yield self._get_new_device_messages()
)
# BEGIN CRITICAL SECTION
#
# In order to avoid a race condition, we need to make sure that
# the following code (from popping the queues up to the point
# where we decide if we actually have any pending messages) is
# atomic - otherwise new PDUs or EDUs might arrive in the
# meantime, but not get sent because we hold the
# transmission_loop_running flag.
pending_pdus = self._pending_pdus
# We can only include at most 50 PDUs per transactions
pending_pdus, self._pending_pdus = pending_pdus[:50], pending_pdus[50:]
pending_edus = self._pending_edus
# We can only include at most 100 EDUs per transactions
pending_edus, self._pending_edus = pending_edus[:100], pending_edus[100:]
pending_edus.extend(
self._pending_edus_keyed.values()
)
self._pending_edus_keyed = {}
pending_edus.extend(device_message_edus)
pending_presence = self._pending_presence
self._pending_presence = {}
if pending_presence:
pending_edus.append(
Edu(
origin=self._server_name,
destination=self._destination,
edu_type="m.presence",
content={
"push": [
format_user_presence_state(
presence, self._clock.time_msec()
)
for presence in pending_presence.values()
]
},
)
)
if pending_pdus:
logger.debug("TX [%s] len(pending_pdus_by_dest[dest]) = %d",
self._destination, len(pending_pdus))
if not pending_pdus and not pending_edus:
logger.debug("TX [%s] Nothing to send", self._destination)
self._last_device_stream_id = device_stream_id
return
# END CRITICAL SECTION
success = yield self._transaction_manager.send_new_transaction(
self._destination, pending_pdus, pending_edus
)
if success:
sent_transactions_counter.inc()
sent_edus_counter.inc(len(pending_edus))
for edu in pending_edus:
sent_edus_by_type.labels(edu.edu_type).inc()
# Remove the acknowledged device messages from the database
# Only bother if we actually sent some device messages
if device_message_edus:
yield self._store.delete_device_msgs_for_remote(
self._destination, device_stream_id
)
logger.info(
"Marking as sent %r %r", self._destination, dev_list_id
)
yield self._store.mark_as_sent_devices_by_remote(
self._destination, dev_list_id
)
self._last_device_stream_id = device_stream_id
self._last_device_list_stream_id = dev_list_id
else:
break
except NotRetryingDestination as e:
logger.debug(
"TX [%s] not ready for retry yet (next retry at %s) - "
"dropping transaction for now",
self._destination,
datetime.datetime.fromtimestamp(
(e.retry_last_ts + e.retry_interval) / 1000.0
),
)
except FederationDeniedError as e:
logger.info(e)
except HttpResponseException as e:
logger.warning(
"TX [%s] Received %d response to transaction: %s",
self._destination, e.code, e,
)
except RequestSendFailed as e:
logger.warning("TX [%s] Failed to send transaction: %s", self._destination, e)
for p, _ in pending_pdus:
logger.info("Failed to send event %s to %s", p.event_id,
self._destination)
except Exception:
logger.exception(
"TX [%s] Failed to send transaction",
self._destination,
)
for p, _ in pending_pdus:
logger.info("Failed to send event %s to %s", p.event_id,
self._destination)
finally:
# We want to be *very* sure we clear this after we stop processing
self.transmission_loop_running = False
@defer.inlineCallbacks
def _get_new_device_messages(self):
last_device_stream_id = self._last_device_stream_id
to_device_stream_id = self._store.get_to_device_stream_token()
contents, stream_id = yield self._store.get_new_device_msgs_for_remote(
self._destination, last_device_stream_id, to_device_stream_id
)
edus = [
Edu(
origin=self._server_name,
destination=self._destination,
edu_type="m.direct_to_device",
content=content,
)
for content in contents
]
last_device_list = self._last_device_list_stream_id
now_stream_id, results = yield self._store.get_devices_by_remote(
self._destination, last_device_list
)
edus.extend(
Edu(
origin=self._server_name,
destination=self._destination,
edu_type="m.device_list_update",
content=content,
)
for content in results
)
defer.returnValue((edus, stream_id, now_stream_id))