94 lines
3.2 KiB
Python
94 lines
3.2 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 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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import logging
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from typing import Dict, Optional
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import six
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from synapse.storage.data_stores.main.cache import (
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CURRENT_STATE_CACHE_NAME,
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CacheInvalidationWorkerStore,
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)
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from synapse.storage.database import Database
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from synapse.storage.engines import PostgresEngine
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from ._slaved_id_tracker import SlavedIdTracker
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logger = logging.getLogger(__name__)
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def __func__(inp):
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if six.PY3:
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return inp
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else:
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return inp.__func__
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class BaseSlavedStore(CacheInvalidationWorkerStore):
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def __init__(self, database: Database, db_conn, hs):
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super(BaseSlavedStore, self).__init__(database, db_conn, hs)
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if isinstance(self.database_engine, PostgresEngine):
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self._cache_id_gen = SlavedIdTracker(
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db_conn, "cache_invalidation_stream", "stream_id"
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) # type: Optional[SlavedIdTracker]
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else:
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self._cache_id_gen = None
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self.hs = hs
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def stream_positions(self) -> Dict[str, int]:
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"""
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Get the current positions of all the streams this store wants to subscribe to
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Returns:
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map from stream name to the most recent update we have for
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that stream (ie, the point we want to start replicating from)
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"""
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pos = {}
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if self._cache_id_gen:
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pos["caches"] = self._cache_id_gen.get_current_token()
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return pos
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def get_cache_stream_token(self):
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if self._cache_id_gen:
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return self._cache_id_gen.get_current_token()
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else:
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return 0
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def process_replication_rows(self, stream_name, token, rows):
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if stream_name == "caches":
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if self._cache_id_gen:
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self._cache_id_gen.advance(token)
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for row in rows:
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if row.cache_func == CURRENT_STATE_CACHE_NAME:
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if row.keys is None:
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raise Exception(
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"Can't send an 'invalidate all' for current state cache"
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)
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room_id = row.keys[0]
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members_changed = set(row.keys[1:])
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self._invalidate_state_caches(room_id, members_changed)
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else:
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self._attempt_to_invalidate_cache(row.cache_func, row.keys)
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def _invalidate_cache_and_stream(self, txn, cache_func, keys):
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txn.call_after(cache_func.invalidate, keys)
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txn.call_after(self._send_invalidation_poke, cache_func, keys)
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def _send_invalidation_poke(self, cache_func, keys):
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self.hs.get_tcp_replication().send_invalidate_cache(cache_func, keys)
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