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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, Tuple
-
- from canonicaljson import json
-
- 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.metrics import measure_func
-
- if TYPE_CHECKING:
- import synapse.server
-
- logger = logging.getLogger(__name__)
-
-
- class TransactionManager(object):
- """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()
-
- # 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,
- pending_pdus: List[Tuple[EventBase, int]],
- pending_edus: List[Edu],
- ):
-
- # 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 pending_edus:
- context = edu.get_context()
- if context:
- span_contexts.append(extract_text_map(json.loads(context)))
- if keep_destination:
- edu.strip_context()
-
- with start_active_span_follows_from("send_transaction", span_contexts):
-
- # Sort based on the order field
- pending_pdus.sort(key=lambda t: t[1])
- pdus = [x[0] for x in pending_pdus]
- edus = pending_edus
-
- 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
- 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
-
- set_tag(tags.ERROR, not success)
- return success
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