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Factor per-destination stuff out of TransactionQueue

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This is easier than having to have a million fields keyed on destination.
This commit is contained in:
Richard van der Hoff 2019-03-12 21:57:47 +00:00
parent 6accbd25bc
commit 5d89a526f1
1 changed files with 182 additions and 132 deletions
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314
synapse/federation/transaction_queue.py
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@ -27,6 +27,7 @@ from synapse.api.errors import (
HttpResponseException,
RequestSendFailed,
)
from synapse.events import EventBase
from synapse.handlers.presence import format_user_presence_state, get_interested_remotes
from synapse.metrics import (
LaterGauge,
@ -36,6 +37,7 @@ 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 import logcontext
from synapse.util.metrics import measure_func
from synapse.util.retryutils import NotRetryingDestination, get_retry_limiter
@ -80,73 +82,47 @@ class TransactionQueue(object):
self.store = hs.get_datastore()
self.state = hs.get_state_handler()
self.transaction_actions = TransactionActions(self.store)
self.transport_layer = hs.get_federation_transport_client()
self.clock = hs.get_clock()
self.is_mine_id = hs.is_mine_id
# Is a mapping from destinations -> deferreds. Used to keep track
# of which destinations have transactions in flight and when they are
# done
self.pending_transactions = {}
self._transaction_sender = TransactionSender(hs)
# map from destination to PerDestinationQueue
self._per_destination_queues = {} # type: dict[str, PerDestinationQueue]
LaterGauge(
"synapse_federation_transaction_queue_pending_destinations",
"",
[],
lambda: len(self.pending_transactions),
lambda: sum(
1 for d in self._per_destination_queues.values()
if d.transmission_loop_running
),
)
# Is a mapping from destination -> list of
# tuple(pending pdus, deferred, order)
self.pending_pdus_by_dest = pdus = {}
# destination -> list of tuple(edu, deferred)
self.pending_edus_by_dest = edus = {}
# Map of user_id -> UserPresenceState for all the pending presence
# to be sent out by user_id. Entries here get processed and put in
# pending_presence_by_dest
self.pending_presence = {}
# Map of destination -> user_id -> UserPresenceState of pending presence
# to be sent to each destinations
self.pending_presence_by_dest = presence = {}
# 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 destination -> (edu_type, key) -> Edu
self.pending_edus_keyed_by_dest = edus_keyed = {}
LaterGauge(
"synapse_federation_transaction_queue_pending_pdus",
"",
[],
lambda: sum(map(len, pdus.values())),
lambda: sum(
d.pending_pdu_count() for d in self._per_destination_queues.values()
),
)
LaterGauge(
"synapse_federation_transaction_queue_pending_edus",
"",
[],
lambda: (
sum(map(len, edus.values()))
+ sum(map(len, presence.values()))
+ sum(map(len, edus_keyed.values()))
lambda: sum(
d.pending_edu_count() for d in self._per_destination_queues.values()
),
)
# destination -> stream_id of last successfully sent to-device message.
# NB: may be a long or an int.
self.last_device_stream_id_by_dest = {}
# destination -> stream_id of last successfully sent device list
# update.
self.last_device_list_stream_id_by_dest = {}
# HACK to get unique tx id
self._next_txn_id = int(self.clock.time_msec())
self._order = 1
self._is_processing = False
@ -154,6 +130,13 @@ class TransactionQueue(object):
self._processing_pending_presence = False
def _get_per_destination_queue(self, destination):
queue = self._per_destination_queues.get(destination)
if not queue:
queue = PerDestinationQueue(self.hs, self._transaction_sender, destination)
self._per_destination_queues[destination] = queue
return queue
def notify_new_events(self, current_id):
"""This gets called when we have some new events we might want to
send out to other servers.
@ -284,11 +267,7 @@ class TransactionQueue(object):
sent_pdus_destination_dist_count.inc()
for destination in destinations:
self.pending_pdus_by_dest.setdefault(destination, []).append(
(pdu, order)
)
self._attempt_new_transaction(destination)
self._get_per_destination_queue(destination).send_pdu(pdu, order)
@defer.inlineCallbacks
def send_read_receipt(self, receipt):
@ -387,14 +366,7 @@ class TransactionQueue(object):
for destination in destinations:
if destination == self.server_name:
continue
self.pending_presence_by_dest.setdefault(
destination, {}
).update({
state.user_id: state for state in states
})
self._attempt_new_transaction(destination)
self._get_per_destination_queue(destination).send_presence(states)
def build_and_send_edu(self, destination, edu_type, content, key=None):
"""Construct an Edu object, and queue it for sending
@ -425,73 +397,136 @@ class TransactionQueue(object):
edu (Edu): edu to send
key (Any|None): clobbering key for this edu
"""
queue = self._get_per_destination_queue(edu.destination)
if key:
self.pending_edus_keyed_by_dest.setdefault(
edu.destination, {}
)[(edu.edu_type, key)] = edu
queue.send_keyed_edu(edu, key)
else:
self.pending_edus_by_dest.setdefault(edu.destination, []).append(edu)
self._attempt_new_transaction(edu.destination)
queue.send_edu(edu)
def send_device_messages(self, destination):
if destination == self.server_name:
logger.info("Not sending device update to ourselves")
return
self._attempt_new_transaction(destination)
self._get_per_destination_queue(destination).attempt_new_transaction()
def get_current_token(self):
return 0
def _attempt_new_transaction(self, destination):
class PerDestinationQueue(object):
"""
Manages the per-destination transmission queues.
"""
def __init__(self, hs, transaction_sender, destination):
self._server_name = hs.hostname
self._clock = hs.get_clock()
self._store = hs.get_datastore()
self._transaction_sender = transaction_sender
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.
Args:
destination (str):
Returns:
None
"""
# list of (pending_pdu, deferred, order)
if destination in self.pending_transactions:
# XXX: pending_transactions can get stuck on by a never-ending
# request at which point pending_pdus_by_dest just keeps growing.
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",
destination
self._destination
)
return
logger.debug("TX [%s] Starting transaction loop", destination)
logger.debug("TX [%s] Starting transaction loop", self._destination)
run_as_background_process(
"federation_transaction_transmission_loop",
self._transaction_transmission_loop,
destination,
)
@defer.inlineCallbacks
def _transaction_transmission_loop(self, destination):
def _transaction_transmission_loop(self):
pending_pdus = []
try:
self.pending_transactions[destination] = 1
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(destination, self.clock, self.store)
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(destination)
yield self._get_new_device_messages()
)
# BEGIN CRITICAL SECTION
@ -501,39 +536,38 @@ class TransactionQueue(object):
# 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
# pending_transactions flag.
# transmission_loop_running flag.
pending_pdus = self.pending_pdus_by_dest.pop(destination, [])
pending_pdus = self._pending_pdus
# We can only include at most 50 PDUs per transactions
pending_pdus, leftover_pdus = pending_pdus[:50], pending_pdus[50:]
if leftover_pdus:
self.pending_pdus_by_dest[destination] = leftover_pdus
pending_pdus, self._pending_pdus = pending_pdus[:50], pending_pdus[50:]
pending_edus = self.pending_edus_by_dest.pop(destination, [])
pending_edus = self._pending_edus
# We can only include at most 100 EDUs per transactions
pending_edus, leftover_edus = pending_edus[:100], pending_edus[100:]
if leftover_edus:
self.pending_edus_by_dest[destination] = leftover_edus
pending_presence = self.pending_presence_by_dest.pop(destination, {})
pending_edus, self._pending_edus = pending_edus[:100], pending_edus[100:]
pending_edus.extend(
self.pending_edus_keyed_by_dest.pop(destination, {}).values()
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=destination,
origin=self._server_name,
destination=self._destination,
edu_type="m.presence",
content={
"push": [
format_user_presence_state(
presence, self.clock.time_msec()
presence, self._clock.time_msec()
)
for presence in pending_presence.values()
]
@ -543,19 +577,17 @@ class TransactionQueue(object):
if pending_pdus:
logger.debug("TX [%s] len(pending_pdus_by_dest[dest]) = %d",
destination, len(pending_pdus))
self._destination, len(pending_pdus))
if not pending_pdus and not pending_edus:
logger.debug("TX [%s] Nothing to send", destination)
self.last_device_stream_id_by_dest[destination] = (
device_stream_id
)
logger.debug("TX [%s] Nothing to send", self._destination)
self._last_device_stream_id = device_stream_id
return
# END CRITICAL SECTION
success = yield self._send_new_transaction(
destination, pending_pdus, pending_edus,
success = yield self._transaction_sender.send_new_transaction(
self._destination, pending_pdus, pending_edus
)
if success:
sent_transactions_counter.inc()
@ -565,23 +597,25 @@ class TransactionQueue(object):
# 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(
destination, device_stream_id
yield self._store.delete_device_msgs_for_remote(
self._destination, device_stream_id
)
logger.info("Marking as sent %r %r", destination, dev_list_id)
yield self.store.mark_as_sent_devices_by_remote(
destination, dev_list_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_by_dest[destination] = device_stream_id
self.last_device_list_stream_id_by_dest[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",
destination,
self._destination,
datetime.datetime.fromtimestamp(
(e.retry_last_ts + e.retry_interval) / 1000.0
),
@ -591,51 +625,51 @@ class TransactionQueue(object):
except HttpResponseException as e:
logger.warning(
"TX [%s] Received %d response to transaction: %s",
destination, e.code, e,
self._destination, e.code, e,
)
except RequestSendFailed as e:
logger.warning("TX [%s] Failed to send transaction: %s", destination, 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,
destination)
self._destination)
except Exception:
logger.exception(
"TX [%s] Failed to send transaction",
destination,
self._destination,
)
for p, _ in pending_pdus:
logger.info("Failed to send event %s to %s", p.event_id,
destination)
self._destination)
finally:
# We want to be *very* sure we delete this after we stop processing
self.pending_transactions.pop(destination, None)
# 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, destination):
last_device_stream_id = self.last_device_stream_id_by_dest.get(destination, 0)
to_device_stream_id = self.store.get_to_device_stream_token()
contents, stream_id = yield self.store.get_new_device_msgs_for_remote(
destination, last_device_stream_id, to_device_stream_id
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=destination,
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_by_dest.get(destination, 0)
now_stream_id, results = yield self.store.get_devices_by_remote(
destination, last_device_list
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=destination,
origin=self._server_name,
destination=self._destination,
edu_type="m.device_list_update",
content=content,
)
@ -643,9 +677,25 @@ class TransactionQueue(object):
)
defer.returnValue((edus, stream_id, now_stream_id))
class TransactionSender(object):
"""Helper class which handles building and sending transactions
shared between PerDestinationQueue objects
"""
def __init__(self, hs):
self._server_name = hs.hostname
self._clock = hs.get_clock()
self._store = hs.get_datastore()
self._transaction_actions = TransactionActions(self._store)
self._transport_layer = hs.get_federation_transport_client()
# HACK to get unique tx id
self._next_txn_id = int(self._clock.time_msec())
@measure_func("_send_new_transaction")
@defer.inlineCallbacks
def _send_new_transaction(self, destination, pending_pdus, pending_edus):
def send_new_transaction(self, destination, pending_pdus, pending_edus):
# Sort based on the order field
pending_pdus.sort(key=lambda t: t[1])
@ -669,9 +719,9 @@ class TransactionQueue(object):
logger.debug("TX [%s] Persisting transaction...", destination)
transaction = Transaction.create_new(
origin_server_ts=int(self.clock.time_msec()),
origin_server_ts=int(self._clock.time_msec()),
transaction_id=txn_id,
origin=self.server_name,
origin=self._server_name,
destination=destination,
pdus=pdus,
edus=edus,
@ -679,7 +729,7 @@ class TransactionQueue(object):
self._next_txn_id += 1
yield self.transaction_actions.prepare_to_send(transaction)
yield self._transaction_actions.prepare_to_send(transaction)
logger.debug("TX [%s] Persisted transaction", destination)
logger.info(
@ -697,7 +747,7 @@ class TransactionQueue(object):
# keys work
def json_data_cb():
data = transaction.get_dict()
now = int(self.clock.time_msec())
now = int(self._clock.time_msec())
if "pdus" in data:
for p in data["pdus"]:
if "age_ts" in p:
@ -707,7 +757,7 @@ class TransactionQueue(object):
return data
try:
response = yield self.transport_layer.send_transaction(
response = yield self._transport_layer.send_transaction(
transaction, json_data_cb
)
code = 200
@ -727,7 +777,7 @@ class TransactionQueue(object):
destination, txn_id, code
)
yield self.transaction_actions.delivered(
yield self._transaction_actions.delivered(
transaction, code, response
)