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
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
|
# -*- coding: utf-8 -*-
# Copyright 2014-2016 OpenMarket 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 collections import namedtuple
from canonicaljson import encode_canonical_json
from synapse.metrics.background_process_metrics import run_as_background_process
from synapse.storage._base import SQLBaseStore, db_to_json
from synapse.storage.database import DatabasePool
from synapse.util.caches.expiringcache import ExpiringCache
db_binary_type = memoryview
logger = logging.getLogger(__name__)
_TransactionRow = namedtuple(
"_TransactionRow",
("id", "transaction_id", "destination", "ts", "response_code", "response_json"),
)
_UpdateTransactionRow = namedtuple(
"_TransactionRow", ("response_code", "response_json")
)
SENTINEL = object()
class TransactionStore(SQLBaseStore):
"""A collection of queries for handling PDUs.
"""
def __init__(self, database: DatabasePool, db_conn, hs):
super(TransactionStore, self).__init__(database, db_conn, hs)
self._clock.looping_call(self._start_cleanup_transactions, 30 * 60 * 1000)
self._destination_retry_cache = ExpiringCache(
cache_name="get_destination_retry_timings",
clock=self._clock,
expiry_ms=5 * 60 * 1000,
)
def get_received_txn_response(self, transaction_id, origin):
"""For an incoming transaction from a given origin, check if we have
already responded to it. If so, return the response code and response
body (as a dict).
Args:
transaction_id (str)
origin(str)
Returns:
tuple: None if we have not previously responded to
this transaction or a 2-tuple of (int, dict)
"""
return self.db_pool.runInteraction(
"get_received_txn_response",
self._get_received_txn_response,
transaction_id,
origin,
)
def _get_received_txn_response(self, txn, transaction_id, origin):
result = self.db_pool.simple_select_one_txn(
txn,
table="received_transactions",
keyvalues={"transaction_id": transaction_id, "origin": origin},
retcols=(
"transaction_id",
"origin",
"ts",
"response_code",
"response_json",
"has_been_referenced",
),
allow_none=True,
)
if result and result["response_code"]:
return result["response_code"], db_to_json(result["response_json"])
else:
return None
def set_received_txn_response(self, transaction_id, origin, code, response_dict):
"""Persist the response we returened for an incoming transaction, and
should return for subsequent transactions with the same transaction_id
and origin.
Args:
txn
transaction_id (str)
origin (str)
code (int)
response_json (str)
"""
return self.db_pool.simple_insert(
table="received_transactions",
values={
"transaction_id": transaction_id,
"origin": origin,
"response_code": code,
"response_json": db_binary_type(encode_canonical_json(response_dict)),
"ts": self._clock.time_msec(),
},
or_ignore=True,
desc="set_received_txn_response",
)
async def get_destination_retry_timings(self, destination):
"""Gets the current retry timings (if any) for a given destination.
Args:
destination (str)
Returns:
None if not retrying
Otherwise a dict for the retry scheme
"""
result = self._destination_retry_cache.get(destination, SENTINEL)
if result is not SENTINEL:
return result
result = await self.db_pool.runInteraction(
"get_destination_retry_timings",
self._get_destination_retry_timings,
destination,
)
# We don't hugely care about race conditions between getting and
# invalidating the cache, since we time out fairly quickly anyway.
self._destination_retry_cache[destination] = result
return result
def _get_destination_retry_timings(self, txn, destination):
result = self.db_pool.simple_select_one_txn(
txn,
table="destinations",
keyvalues={"destination": destination},
retcols=("destination", "failure_ts", "retry_last_ts", "retry_interval"),
allow_none=True,
)
if result and result["retry_last_ts"] > 0:
return result
else:
return None
def set_destination_retry_timings(
self, destination, failure_ts, retry_last_ts, retry_interval
):
"""Sets the current retry timings for a given destination.
Both timings should be zero if retrying is no longer occuring.
Args:
destination (str)
failure_ts (int|None) - when the server started failing (ms since epoch)
retry_last_ts (int) - time of last retry attempt in unix epoch ms
retry_interval (int) - how long until next retry in ms
"""
self._destination_retry_cache.pop(destination, None)
return self.db_pool.runInteraction(
"set_destination_retry_timings",
self._set_destination_retry_timings,
destination,
failure_ts,
retry_last_ts,
retry_interval,
)
def _set_destination_retry_timings(
self, txn, destination, failure_ts, retry_last_ts, retry_interval
):
if self.database_engine.can_native_upsert:
# Upsert retry time interval if retry_interval is zero (i.e. we're
# resetting it) or greater than the existing retry interval.
sql = """
INSERT INTO destinations (
destination, failure_ts, retry_last_ts, retry_interval
)
VALUES (?, ?, ?, ?)
ON CONFLICT (destination) DO UPDATE SET
failure_ts = EXCLUDED.failure_ts,
retry_last_ts = EXCLUDED.retry_last_ts,
retry_interval = EXCLUDED.retry_interval
WHERE
EXCLUDED.retry_interval = 0
OR destinations.retry_interval < EXCLUDED.retry_interval
"""
txn.execute(sql, (destination, failure_ts, retry_last_ts, retry_interval))
return
self.database_engine.lock_table(txn, "destinations")
# We need to be careful here as the data may have changed from under us
# due to a worker setting the timings.
prev_row = self.db_pool.simple_select_one_txn(
txn,
table="destinations",
keyvalues={"destination": destination},
retcols=("failure_ts", "retry_last_ts", "retry_interval"),
allow_none=True,
)
if not prev_row:
self.db_pool.simple_insert_txn(
txn,
table="destinations",
values={
"destination": destination,
"failure_ts": failure_ts,
"retry_last_ts": retry_last_ts,
"retry_interval": retry_interval,
},
)
elif retry_interval == 0 or prev_row["retry_interval"] < retry_interval:
self.db_pool.simple_update_one_txn(
txn,
"destinations",
keyvalues={"destination": destination},
updatevalues={
"failure_ts": failure_ts,
"retry_last_ts": retry_last_ts,
"retry_interval": retry_interval,
},
)
def _start_cleanup_transactions(self):
return run_as_background_process(
"cleanup_transactions", self._cleanup_transactions
)
def _cleanup_transactions(self):
now = self._clock.time_msec()
month_ago = now - 30 * 24 * 60 * 60 * 1000
def _cleanup_transactions_txn(txn):
txn.execute("DELETE FROM received_transactions WHERE ts < ?", (month_ago,))
return self.db_pool.runInteraction(
"_cleanup_transactions", _cleanup_transactions_txn
)
|
