1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
# 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.types import JsonDict
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.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],
) -> None:
"""
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
"""
# 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):
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(
origin_server_ts=int(self.clock.time_msec()),
transaction_id=txn_id,
origin=self._server_name,
destination=destination,
pdus=[p.get_pdu_json() for p in pdus],
edus=[edu.get_dict() for edu in 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() -> JsonDict:
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
)
except HttpResponseException as e:
code = e.code
set_tag(tags.ERROR, True)
logger.info("TX [%s] {%s} got %d response", destination, txn_id, code)
raise
logger.info("TX [%s] {%s} got 200 response", destination, txn_id)
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,
)
if 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
)
|
