194 lines
6.7 KiB
Python
194 lines
6.7 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2019 New Vector Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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from typing import TYPE_CHECKING, List
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from prometheus_client import Gauge
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from synapse.api.errors import HttpResponseException
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from synapse.events import EventBase
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from synapse.federation.persistence import TransactionActions
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from synapse.federation.units import Edu, Transaction
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from synapse.logging.opentracing import (
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extract_text_map,
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set_tag,
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start_active_span_follows_from,
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tags,
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whitelisted_homeserver,
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)
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from synapse.util import json_decoder
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from synapse.util.metrics import measure_func
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if TYPE_CHECKING:
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import synapse.server
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logger = logging.getLogger(__name__)
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last_pdu_age_metric = Gauge(
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"synapse_federation_last_sent_pdu_age",
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"The age (in seconds) of the last PDU successfully sent to the given domain",
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labelnames=("server_name",),
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)
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class TransactionManager:
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"""Helper class which handles building and sending transactions
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shared between PerDestinationQueue objects
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"""
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def __init__(self, hs: "synapse.server.HomeServer"):
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self._server_name = hs.hostname
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self.clock = hs.get_clock() # nb must be called this for @measure_func
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self._store = hs.get_datastore()
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self._transaction_actions = TransactionActions(self._store)
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self._transport_layer = hs.get_federation_transport_client()
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self._federation_metrics_domains = (
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hs.get_config().federation.federation_metrics_domains
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)
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# HACK to get unique tx id
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self._next_txn_id = int(self.clock.time_msec())
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@measure_func("_send_new_transaction")
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async def send_new_transaction(
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self, destination: str, pdus: List[EventBase], edus: List[Edu],
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) -> bool:
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"""
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Args:
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destination: The destination to send to (e.g. 'example.org')
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pdus: In-order list of PDUs to send
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edus: List of EDUs to send
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Returns:
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True iff the transaction was successful
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"""
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# Make a transaction-sending opentracing span. This span follows on from
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# all the edus in that transaction. This needs to be done since there is
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# no active span here, so if the edus were not received by the remote the
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# span would have no causality and it would be forgotten.
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span_contexts = []
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keep_destination = whitelisted_homeserver(destination)
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for edu in edus:
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context = edu.get_context()
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if context:
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span_contexts.append(extract_text_map(json_decoder.decode(context)))
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if keep_destination:
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edu.strip_context()
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with start_active_span_follows_from("send_transaction", span_contexts):
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success = True
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logger.debug("TX [%s] _attempt_new_transaction", destination)
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txn_id = str(self._next_txn_id)
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logger.debug(
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"TX [%s] {%s} Attempting new transaction (pdus: %d, edus: %d)",
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destination,
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txn_id,
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len(pdus),
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len(edus),
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)
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transaction = Transaction.create_new(
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origin_server_ts=int(self.clock.time_msec()),
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transaction_id=txn_id,
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origin=self._server_name,
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destination=destination,
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pdus=pdus,
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edus=edus,
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)
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self._next_txn_id += 1
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logger.info(
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"TX [%s] {%s} Sending transaction [%s], (PDUs: %d, EDUs: %d)",
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destination,
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txn_id,
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transaction.transaction_id,
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len(pdus),
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len(edus),
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)
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# Actually send the transaction
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# FIXME (erikj): This is a bit of a hack to make the Pdu age
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# keys work
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# FIXME (richardv): I also believe it no longer works. We (now?) store
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# "age_ts" in "unsigned" rather than at the top level. See
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# https://github.com/matrix-org/synapse/issues/8429.
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def json_data_cb():
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data = transaction.get_dict()
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now = int(self.clock.time_msec())
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if "pdus" in data:
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for p in data["pdus"]:
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if "age_ts" in p:
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unsigned = p.setdefault("unsigned", {})
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unsigned["age"] = now - int(p["age_ts"])
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del p["age_ts"]
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return data
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try:
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response = await self._transport_layer.send_transaction(
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transaction, json_data_cb
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)
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code = 200
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except HttpResponseException as e:
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code = e.code
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response = e.response
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if e.code in (401, 404, 429) or 500 <= e.code:
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logger.info(
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"TX [%s] {%s} got %d response", destination, txn_id, code
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)
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raise e
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logger.info("TX [%s] {%s} got %d response", destination, txn_id, code)
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if code == 200:
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for e_id, r in response.get("pdus", {}).items():
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if "error" in r:
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logger.warning(
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"TX [%s] {%s} Remote returned error for %s: %s",
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destination,
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txn_id,
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e_id,
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r,
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)
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else:
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for p in pdus:
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logger.warning(
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"TX [%s] {%s} Failed to send event %s",
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destination,
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txn_id,
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p.event_id,
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)
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success = False
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if success and pdus and destination in self._federation_metrics_domains:
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last_pdu = pdus[-1]
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last_pdu_age = self.clock.time_msec() - last_pdu.origin_server_ts
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last_pdu_age_metric.labels(server_name=destination).set(
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last_pdu_age / 1000
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)
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set_tag(tags.ERROR, not success)
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return success
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