354 lines
11 KiB
Python
354 lines
11 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014, 2015 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, Table
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from collections import namedtuple
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from twisted.internet import defer
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import logging
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logger = logging.getLogger(__name__)
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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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# a write-through cache of DestinationsTable.EntryType indexed by
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# destination string
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destination_retry_cache = {}
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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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where_clause = "transaction_id = ? AND origin = ?"
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query = ReceivedTransactionsTable.select_statement(where_clause)
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txn.execute(query, (transaction_id, origin))
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results = ReceivedTransactionsTable.decode_results(txn.fetchall())
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if results and results[0].response_code:
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return (results[0].response_code, results[0].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.runInteraction(
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"set_received_txn_response",
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self._set_received_txn_response,
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transaction_id, origin, code, response_dict
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)
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def _set_received_txn_response(self, txn, transaction_id, origin, code,
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response_json):
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query = (
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"UPDATE %s "
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"SET response_code = ?, response_json = ? "
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"WHERE transaction_id = ? AND origin = ?"
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) % ReceivedTransactionsTable.table_name
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txn.execute(query, (code, response_json, transaction_id, origin))
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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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return self.runInteraction(
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"prep_send_transaction",
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self._prep_send_transaction,
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transaction_id, destination, origin_server_ts
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)
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def _prep_send_transaction(self, txn, transaction_id, destination,
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origin_server_ts):
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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 = "%s ORDER BY id DESC LIMIT 1" % (
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SentTransactions.select_statement("destination = ?"),
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)
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results = txn.execute(query, (destination,))
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results = SentTransactions.decode_results(results)
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prev_txns = [r.transaction_id for r in results]
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# Actually add the new transaction to the sent_transactions table.
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query = SentTransactions.insert_statement()
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txn.execute(query, SentTransactions.EntryType(
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None,
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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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# Update the tx id -> pdu id mapping
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# values = [
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# (transaction_id, destination, pdu[0], pdu[1])
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# for pdu in pdu_list
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# ]
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#
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# logger.debug("Inserting: %s", repr(values))
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#
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# query = TransactionsToPduTable.insert_statement()
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# txn.executemany(query, values)
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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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return self.runInteraction(
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"delivered_txn",
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self._delivered_txn,
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transaction_id, destination, code, response_dict
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)
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def _delivered_txn(cls, txn, transaction_id, destination,
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code, response_json):
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query = (
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"UPDATE %s "
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"SET response_code = ?, response_json = ? "
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"WHERE transaction_id = ? AND destination = ?"
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) % SentTransactions.table_name
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txn.execute(query, (code, response_json, transaction_id, destination))
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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 `ReceivedTransactionsTable.EntryType`
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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(cls, txn, transaction_id, destination):
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where = (
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"destination = ? AND id > (select id FROM %s WHERE "
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"transaction_id = ? AND destination = ?)"
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) % (
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SentTransactions.table_name
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)
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query = SentTransactions.select_statement(where)
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txn.execute(query, (destination, transaction_id, destination))
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return ReceivedTransactionsTable.decode_results(txn.fetchall())
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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 DestinationsTable.EntryType for the retry scheme
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"""
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if destination in self.destination_retry_cache:
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return defer.succeed(self.destination_retry_cache[destination])
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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(cls, txn, destination):
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query = DestinationsTable.select_statement("destination = ?")
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txn.execute(query, (destination,))
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result = txn.fetchall()
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if result:
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result = DestinationsTable.decode_single_result(result)
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if 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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self.destination_retry_cache[destination] = (
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DestinationsTable.EntryType(
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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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)
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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(cls, txn, destination,
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retry_last_ts, retry_interval):
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query = (
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"INSERT OR REPLACE INTO %s "
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"(destination, retry_last_ts, retry_interval) "
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"VALUES (?, ?, ?) "
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) % DestinationsTable.table_name
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txn.execute(query, (destination, retry_last_ts, retry_interval))
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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 `DestinationsTable.EntryType`
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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(cls, txn):
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where = "retry_last_ts > 0 and retry_next_ts < now()"
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query = DestinationsTable.select_statement(where)
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txn.execute(query)
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return DestinationsTable.decode_results(txn.fetchall())
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class ReceivedTransactionsTable(Table):
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table_name = "received_transactions"
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fields = [
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"transaction_id",
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"origin",
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"ts",
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"response_code",
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"response_json",
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"has_been_referenced",
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]
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EntryType = namedtuple("ReceivedTransactionsEntry", fields)
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class SentTransactions(Table):
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table_name = "sent_transactions"
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fields = [
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"id",
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"transaction_id",
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"destination",
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"ts",
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"response_code",
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"response_json",
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]
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EntryType = namedtuple("SentTransactionsEntry", fields)
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class TransactionsToPduTable(Table):
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table_name = "transaction_id_to_pdu"
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fields = [
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"transaction_id",
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"destination",
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"pdu_id",
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"pdu_origin",
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]
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EntryType = namedtuple("TransactionsToPduEntry", fields)
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class DestinationsTable(Table):
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table_name = "destinations"
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fields = [
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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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EntryType = namedtuple("DestinationsEntry", fields)
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