385 lines
12 KiB
Python
385 lines
12 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014-2016 OpenMarket 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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from ._base import SQLBaseStore
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from synapse.util.caches.descriptors import cached
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from twisted.internet import defer, reactor
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from canonicaljson import encode_canonical_json
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from collections import namedtuple
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import itertools
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import logging
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logger = logging.getLogger(__name__)
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_TransactionRow = namedtuple(
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"_TransactionRow", (
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"id", "transaction_id", "destination", "ts", "response_code",
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"response_json",
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)
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)
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_UpdateTransactionRow = namedtuple(
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"_TransactionRow", (
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"response_code", "response_json",
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)
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)
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class TransactionStore(SQLBaseStore):
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"""A collection of queries for handling PDUs.
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"""
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def __init__(self, hs):
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super(TransactionStore, self).__init__(hs)
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# New transactions that are currently in flights
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self.inflight_transactions = {}
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# Newly delievered transactions that *weren't* persisted while in flight
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self.new_delivered_transactions = {}
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# Newly delivered transactions that *were* persisted while in flight
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self.update_delivered_transactions = {}
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self.last_transaction = {}
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reactor.addSystemEventTrigger("before", "shutdown", self._persist_in_mem_txns)
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hs.get_clock().looping_call(
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self._persist_in_mem_txns,
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1000,
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)
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def get_received_txn_response(self, transaction_id, origin):
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"""For an incoming transaction from a given origin, check if we have
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already responded to it. If so, return the response code and response
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body (as a dict).
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Args:
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transaction_id (str)
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origin(str)
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Returns:
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tuple: None if we have not previously responded to
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this transaction or a 2-tuple of (int, dict)
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"""
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return self.runInteraction(
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"get_received_txn_response",
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self._get_received_txn_response, transaction_id, origin
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)
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def _get_received_txn_response(self, txn, transaction_id, origin):
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result = self._simple_select_one_txn(
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txn,
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table="received_transactions",
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keyvalues={
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"transaction_id": transaction_id,
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"origin": origin,
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},
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retcols=(
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"transaction_id", "origin", "ts", "response_code", "response_json",
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"has_been_referenced",
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),
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allow_none=True,
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)
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if result and result["response_code"]:
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return result["response_code"], result["response_json"]
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else:
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return None
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def set_received_txn_response(self, transaction_id, origin, code,
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response_dict):
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"""Persist the response we returened for an incoming transaction, and
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should return for subsequent transactions with the same transaction_id
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and origin.
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Args:
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txn
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transaction_id (str)
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origin (str)
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code (int)
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response_json (str)
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"""
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return self._simple_insert(
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table="received_transactions",
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values={
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"transaction_id": transaction_id,
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"origin": origin,
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"response_code": code,
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"response_json": buffer(encode_canonical_json(response_dict)),
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},
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or_ignore=True,
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desc="set_received_txn_response",
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)
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def prep_send_transaction(self, transaction_id, destination,
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origin_server_ts):
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"""Persists an outgoing transaction and calculates the values for the
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previous transaction id list.
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This should be called before sending the transaction so that it has the
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correct value for the `prev_ids` key.
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Args:
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transaction_id (str)
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destination (str)
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origin_server_ts (int)
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Returns:
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list: A list of previous transaction ids.
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"""
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auto_id = self._transaction_id_gen.get_next()
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txn_row = _TransactionRow(
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id=auto_id,
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transaction_id=transaction_id,
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destination=destination,
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ts=origin_server_ts,
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response_code=0,
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response_json=None,
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)
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self.inflight_transactions.setdefault(destination, {})[transaction_id] = txn_row
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prev_txn = self.last_transaction.get(destination)
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if prev_txn:
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return defer.succeed(prev_txn)
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else:
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return self.runInteraction(
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"_get_prevs_txn",
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self._get_prevs_txn,
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destination,
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)
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def _get_prevs_txn(self, txn, destination):
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# First we find out what the prev_txns should be.
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# Since we know that we are only sending one transaction at a time,
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# we can simply take the last one.
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query = (
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"SELECT * FROM sent_transactions"
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" WHERE destination = ?"
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" ORDER BY id DESC LIMIT 1"
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)
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txn.execute(query, (destination,))
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results = self.cursor_to_dict(txn)
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prev_txns = [r["transaction_id"] for r in results]
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return prev_txns
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def delivered_txn(self, transaction_id, destination, code, response_dict):
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"""Persists the response for an outgoing transaction.
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Args:
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transaction_id (str)
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destination (str)
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code (int)
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response_json (str)
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"""
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txn_row = self.inflight_transactions.get(
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destination, {}
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).pop(transaction_id, None)
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self.last_transaction[destination] = transaction_id
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if txn_row:
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d = self.new_delivered_transactions.setdefault(destination, {})
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d[transaction_id] = txn_row._replace(
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response_code=code,
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response_json=None, # For now, don't persist response
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)
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else:
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d = self.update_delivered_transactions.setdefault(destination, {})
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# For now, don't persist response
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d[transaction_id] = _UpdateTransactionRow(code, None)
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def get_transactions_after(self, transaction_id, destination):
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"""Get all transactions after a given local transaction_id.
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Args:
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transaction_id (str)
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destination (str)
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Returns:
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list: A list of dicts
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"""
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return self.runInteraction(
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"get_transactions_after",
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self._get_transactions_after, transaction_id, destination
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)
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def _get_transactions_after(self, txn, transaction_id, destination):
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query = (
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"SELECT * FROM sent_transactions"
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" WHERE destination = ? AND id >"
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" ("
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" SELECT id FROM sent_transactions"
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" WHERE transaction_id = ? AND destination = ?"
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" )"
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)
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txn.execute(query, (destination, transaction_id, destination))
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return self.cursor_to_dict(txn)
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@cached()
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def get_destination_retry_timings(self, destination):
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"""Gets the current retry timings (if any) for a given destination.
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Args:
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destination (str)
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Returns:
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None if not retrying
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Otherwise a dict for the retry scheme
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"""
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return self.runInteraction(
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"get_destination_retry_timings",
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self._get_destination_retry_timings, destination)
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def _get_destination_retry_timings(self, txn, destination):
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result = self._simple_select_one_txn(
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txn,
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table="destinations",
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keyvalues={
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"destination": destination,
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},
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retcols=("destination", "retry_last_ts", "retry_interval"),
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allow_none=True,
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)
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if result and result["retry_last_ts"] > 0:
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return result
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else:
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return None
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def set_destination_retry_timings(self, destination,
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retry_last_ts, retry_interval):
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"""Sets the current retry timings for a given destination.
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Both timings should be zero if retrying is no longer occuring.
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Args:
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destination (str)
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retry_last_ts (int) - time of last retry attempt in unix epoch ms
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retry_interval (int) - how long until next retry in ms
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"""
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# XXX: we could chose to not bother persisting this if our cache thinks
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# this is a NOOP
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return self.runInteraction(
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"set_destination_retry_timings",
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self._set_destination_retry_timings,
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destination,
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retry_last_ts,
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retry_interval,
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)
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def _set_destination_retry_timings(self, txn, destination,
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retry_last_ts, retry_interval):
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txn.call_after(self.get_destination_retry_timings.invalidate, (destination,))
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self._simple_upsert_txn(
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txn,
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"destinations",
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keyvalues={
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"destination": destination,
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},
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values={
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"retry_last_ts": retry_last_ts,
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"retry_interval": retry_interval,
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},
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insertion_values={
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"destination": destination,
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"retry_last_ts": retry_last_ts,
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"retry_interval": retry_interval,
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}
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)
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def get_destinations_needing_retry(self):
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"""Get all destinations which are due a retry for sending a transaction.
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Returns:
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list: A list of dicts
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"""
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return self.runInteraction(
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"get_destinations_needing_retry",
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self._get_destinations_needing_retry
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)
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def _get_destinations_needing_retry(self, txn):
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query = (
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"SELECT * FROM destinations"
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" WHERE retry_last_ts > 0 and retry_next_ts < ?"
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)
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txn.execute(query, (self._clock.time_msec(),))
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return self.cursor_to_dict(txn)
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@defer.inlineCallbacks
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def _persist_in_mem_txns(self):
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try:
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inflight = self.inflight_transactions
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new_delivered = self.new_delivered_transactions
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update_delivered = self.update_delivered_transactions
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self.inflight_transactions = {}
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self.new_delivered_transactions = {}
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self.update_delivered_transactions = {}
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full_rows = [
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row._asdict()
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for txn_map in itertools.chain(inflight.values(), new_delivered.values())
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for row in txn_map.values()
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]
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def f(txn):
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if full_rows:
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self._simple_insert_many_txn(
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txn=txn,
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table="sent_transactions",
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values=full_rows
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)
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for dest, txn_map in update_delivered.items():
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for txn_id, update_row in txn_map.items():
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self._simple_update_one_txn(
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txn,
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table="sent_transactions",
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keyvalues={
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"transaction_id": txn_id,
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"destination": dest,
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},
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updatevalues={
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"response_code": update_row.response_code,
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"response_json": None, # For now, don't persist response
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}
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)
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if full_rows or update_delivered:
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yield self.runInteraction("_persist_in_mem_txns", f)
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except:
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logger.exception("Failed to persist transactions!")
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