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- # -*- coding: utf-8 -*-
- # 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 logging
- from typing import TYPE_CHECKING, List
- from prometheus_client import Gauge
- from synapse.api.errors import HttpResponseException
- from synapse.events import EventBase
- from synapse.federation.persistence import TransactionActions
- from synapse.federation.units import Edu, Transaction
- from synapse.logging.opentracing import (
- extract_text_map,
- set_tag,
- start_active_span_follows_from,
- tags,
- whitelisted_homeserver,
- )
- from synapse.util import json_decoder
- from synapse.util.metrics import measure_func
- if TYPE_CHECKING:
- import synapse.server
- logger = logging.getLogger(__name__)
- last_pdu_ts_metric = Gauge(
- "synapse_federation_last_sent_pdu_time",
- "The timestamp of the last PDU which was successfully sent to the given domain",
- labelnames=("server_name",),
- )
- class TransactionManager:
- """Helper class which handles building and sending transactions
- shared between PerDestinationQueue objects
- """
- def __init__(self, hs: "synapse.server.HomeServer"):
- self._server_name = hs.hostname
- self.clock = hs.get_clock() # nb must be called this for @measure_func
- self._store = hs.get_datastore()
- self._transaction_actions = TransactionActions(self._store)
- self._transport_layer = hs.get_federation_transport_client()
- self._federation_metrics_domains = (
- hs.get_config().federation.federation_metrics_domains
- )
- # HACK to get unique tx id
- self._next_txn_id = int(self.clock.time_msec())
- @measure_func("_send_new_transaction")
- async def send_new_transaction(
- self,
- destination: str,
- pdus: List[EventBase],
- edus: List[Edu],
- ) -> bool:
- """
- Args:
- destination: The destination to send to (e.g. 'example.org')
- pdus: In-order list of PDUs to send
- edus: List of EDUs to send
- Returns:
- True iff the transaction was successful
- """
- # Make a transaction-sending opentracing span. This span follows on from
- # all the edus in that transaction. This needs to be done since there is
- # no active span here, so if the edus were not received by the remote the
- # span would have no causality and it would be forgotten.
- span_contexts = []
- keep_destination = whitelisted_homeserver(destination)
- for edu in edus:
- context = edu.get_context()
- if context:
- span_contexts.append(extract_text_map(json_decoder.decode(context)))
- if keep_destination:
- edu.strip_context()
- with start_active_span_follows_from("send_transaction", span_contexts):
- success = True
- logger.debug("TX [%s] _attempt_new_transaction", destination)
- txn_id = str(self._next_txn_id)
- logger.debug(
- "TX [%s] {%s} Attempting new transaction (pdus: %d, edus: %d)",
- destination,
- txn_id,
- len(pdus),
- len(edus),
- )
- transaction = Transaction.create_new(
- origin_server_ts=int(self.clock.time_msec()),
- transaction_id=txn_id,
- origin=self._server_name,
- destination=destination,
- pdus=pdus,
- edus=edus,
- )
- self._next_txn_id += 1
- logger.info(
- "TX [%s] {%s} Sending transaction [%s], (PDUs: %d, EDUs: %d)",
- destination,
- txn_id,
- transaction.transaction_id,
- len(pdus),
- len(edus),
- )
- # Actually send the transaction
- # FIXME (erikj): This is a bit of a hack to make the Pdu age
- # keys work
- # FIXME (richardv): I also believe it no longer works. We (now?) store
- # "age_ts" in "unsigned" rather than at the top level. See
- # https://github.com/matrix-org/synapse/issues/8429.
- def json_data_cb():
- data = transaction.get_dict()
- now = int(self.clock.time_msec())
- if "pdus" in data:
- for p in data["pdus"]:
- if "age_ts" in p:
- unsigned = p.setdefault("unsigned", {})
- unsigned["age"] = now - int(p["age_ts"])
- del p["age_ts"]
- return data
- try:
- response = await self._transport_layer.send_transaction(
- transaction, json_data_cb
- )
- code = 200
- except HttpResponseException as e:
- code = e.code
- response = e.response
- if e.code in (401, 404, 429) or 500 <= e.code:
- logger.info(
- "TX [%s] {%s} got %d response", destination, txn_id, code
- )
- raise e
- logger.info("TX [%s] {%s} got %d response", destination, txn_id, code)
- if code == 200:
- for e_id, r in response.get("pdus", {}).items():
- if "error" in r:
- logger.warning(
- "TX [%s] {%s} Remote returned error for %s: %s",
- destination,
- txn_id,
- e_id,
- r,
- )
- else:
- for p in pdus:
- logger.warning(
- "TX [%s] {%s} Failed to send event %s",
- destination,
- txn_id,
- p.event_id,
- )
- success = False
- if success and pdus and destination in self._federation_metrics_domains:
- last_pdu = pdus[-1]
- last_pdu_ts_metric.labels(server_name=destination).set(
- last_pdu.origin_server_ts / 1000
- )
- set_tag(tags.ERROR, not success)
- return success
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