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https://github.com/element-hq/synapse
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Rename table. Add docs.
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parent
784a2d4f2c
commit
d9664344ec
4 changed files with 16 additions and 6 deletions
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@ -29,7 +29,7 @@ class BaseSlavedStore(SQLBaseStore):
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super(BaseSlavedStore, self).__init__(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_stream", "stream_id",
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db_conn, "cache_invalidation_stream", "stream_id",
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)
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else:
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self._cache_id_gen = None
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@ -126,7 +126,7 @@ class DataStore(RoomMemberStore, RoomStore,
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if isinstance(self.database_engine, PostgresEngine):
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self._cache_id_gen = StreamIdGenerator(
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db_conn, "cache_stream", "stream_id",
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db_conn, "cache_invalidation_stream", "stream_id",
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)
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else:
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self._cache_id_gen = None
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@ -863,6 +863,13 @@ class SQLBaseStore(object):
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return cache, min_val
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def _invalidate_cache_and_stream(self, txn, cache_func, keys):
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"""Invalidates the cache and adds it to the cache stream so slaves
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will know to invalidate their caches.
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This should only be used to invalidate caches where slaves won't
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otherwise know from other replication streams that the cache should
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be invalidated.
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"""
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txn.call_after(cache_func.invalidate, keys)
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if isinstance(self.database_engine, PostgresEngine):
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@ -872,7 +879,7 @@ class SQLBaseStore(object):
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self._simple_insert_txn(
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txn,
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table="cache_stream",
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table="cache_invalidation_stream",
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values={
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"stream_id": stream_id,
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"cache_func": cache_func.__name__,
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@ -887,7 +894,8 @@ class SQLBaseStore(object):
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# send across cache invalidations as quickly as possible. Cache
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# invalidations are idempotent, so duplicates are fine.
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sql = (
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"SELECT stream_id, cache_func, keys, invalidation_ts FROM cache_stream"
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"SELECT stream_id, cache_func, keys, invalidation_ts"
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" FROM cache_invalidation_stream"
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" WHERE stream_id > ? ORDER BY stream_id ASC LIMIT ?"
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)
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txn.execute(sql, (last_id, limit,))
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@ -20,15 +20,17 @@ import logging
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logger = logging.getLogger(__name__)
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# This stream is used to notify replication slaves that some caches have
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# been invalidated that they cannot infer from the other streams.
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CREATE_TABLE = """
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CREATE TABLE cache_stream (
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CREATE TABLE cache_invalidation_stream (
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stream_id BIGINT,
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cache_func TEXT,
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keys TEXT[],
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invalidation_ts BIGINT
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);
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CREATE INDEX cache_stream_id ON cache_stream(stream_id);
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CREATE INDEX cache_invalidation_stream_id ON cache_invalidation_stream(stream_id);
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"""
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