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https://git.anonymousland.org/anonymousland/synapse-product.git
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fae81f2f68
Split off from https://github.com/matrix-org/synapse/pull/9491
Adds a storage method for getting the current presence of all local users, optionally excluding those that are offline. This will be used by the code in #9491 when a PresenceRouter module informs Synapse that a given user should have `"ALL"` user presence updates routed to them. Specifically, it is used here: b588f16e39/synapse/handlers/presence.py (L1131-L1133)
Note that there is a `get_all_presence_updates` function just above. That function is intended to walk up the table through stream IDs, and is primarily used by the presence replication stream. I could possibly make use of it in the PresenceRouter-related code, but it would be a bit of a bodge.
220 lines
7.8 KiB
Python
220 lines
7.8 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 typing import Dict, List, Tuple
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from synapse.api.presence import UserPresenceState
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from synapse.storage._base import SQLBaseStore, make_in_list_sql_clause
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from synapse.util.caches.descriptors import cached, cachedList
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from synapse.util.iterutils import batch_iter
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class PresenceStore(SQLBaseStore):
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async def update_presence(self, presence_states):
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stream_ordering_manager = self._presence_id_gen.get_next_mult(
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len(presence_states)
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)
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async with stream_ordering_manager as stream_orderings:
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await self.db_pool.runInteraction(
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"update_presence",
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self._update_presence_txn,
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stream_orderings,
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presence_states,
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)
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return stream_orderings[-1], self._presence_id_gen.get_current_token()
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def _update_presence_txn(self, txn, stream_orderings, presence_states):
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for stream_id, state in zip(stream_orderings, presence_states):
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txn.call_after(
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self.presence_stream_cache.entity_has_changed, state.user_id, stream_id
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)
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txn.call_after(self._get_presence_for_user.invalidate, (state.user_id,))
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# Actually insert new rows
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self.db_pool.simple_insert_many_txn(
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txn,
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table="presence_stream",
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values=[
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{
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"stream_id": stream_id,
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"user_id": state.user_id,
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"state": state.state,
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"last_active_ts": state.last_active_ts,
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"last_federation_update_ts": state.last_federation_update_ts,
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"last_user_sync_ts": state.last_user_sync_ts,
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"status_msg": state.status_msg,
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"currently_active": state.currently_active,
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}
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for stream_id, state in zip(stream_orderings, presence_states)
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],
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)
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# Delete old rows to stop database from getting really big
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sql = "DELETE FROM presence_stream WHERE stream_id < ? AND "
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for states in batch_iter(presence_states, 50):
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clause, args = make_in_list_sql_clause(
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self.database_engine, "user_id", [s.user_id for s in states]
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)
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txn.execute(sql + clause, [stream_id] + list(args))
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async def get_all_presence_updates(
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self, instance_name: str, last_id: int, current_id: int, limit: int
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) -> Tuple[List[Tuple[int, list]], int, bool]:
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"""Get updates for presence replication stream.
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Args:
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instance_name: The writer we want to fetch updates from. Unused
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here since there is only ever one writer.
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last_id: The token to fetch updates from. Exclusive.
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current_id: The token to fetch updates up to. Inclusive.
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limit: The requested limit for the number of rows to return. The
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function may return more or fewer rows.
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Returns:
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A tuple consisting of: the updates, a token to use to fetch
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subsequent updates, and whether we returned fewer rows than exists
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between the requested tokens due to the limit.
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The token returned can be used in a subsequent call to this
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function to get further updatees.
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The updates are a list of 2-tuples of stream ID and the row data
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"""
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if last_id == current_id:
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return [], current_id, False
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def get_all_presence_updates_txn(txn):
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sql = """
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SELECT stream_id, user_id, state, last_active_ts,
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last_federation_update_ts, last_user_sync_ts,
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status_msg,
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currently_active
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FROM presence_stream
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WHERE ? < stream_id AND stream_id <= ?
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ORDER BY stream_id ASC
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LIMIT ?
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"""
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txn.execute(sql, (last_id, current_id, limit))
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updates = [(row[0], row[1:]) for row in txn]
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upper_bound = current_id
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limited = False
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if len(updates) >= limit:
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upper_bound = updates[-1][0]
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limited = True
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return updates, upper_bound, limited
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return await self.db_pool.runInteraction(
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"get_all_presence_updates", get_all_presence_updates_txn
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)
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@cached()
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def _get_presence_for_user(self, user_id):
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raise NotImplementedError()
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@cachedList(
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cached_method_name="_get_presence_for_user",
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list_name="user_ids",
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num_args=1,
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)
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async def get_presence_for_users(self, user_ids):
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rows = await self.db_pool.simple_select_many_batch(
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table="presence_stream",
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column="user_id",
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iterable=user_ids,
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keyvalues={},
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retcols=(
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"user_id",
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"state",
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"last_active_ts",
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"last_federation_update_ts",
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"last_user_sync_ts",
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"status_msg",
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"currently_active",
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),
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desc="get_presence_for_users",
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)
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for row in rows:
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row["currently_active"] = bool(row["currently_active"])
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return {row["user_id"]: UserPresenceState(**row) for row in rows}
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async def get_presence_for_all_users(
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self,
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include_offline: bool = True,
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) -> Dict[str, UserPresenceState]:
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"""Retrieve the current presence state for all users.
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Note that the presence_stream table is culled frequently, so it should only
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contain the latest presence state for each user.
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Args:
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include_offline: Whether to include offline presence states
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Returns:
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A dict of user IDs to their current UserPresenceState.
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"""
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users_to_state = {}
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exclude_keyvalues = None
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if not include_offline:
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# Exclude offline presence state
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exclude_keyvalues = {"state": "offline"}
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# This may be a very heavy database query.
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# We paginate in order to not block a database connection.
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limit = 100
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offset = 0
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while True:
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rows = await self.db_pool.runInteraction(
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"get_presence_for_all_users",
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self.db_pool.simple_select_list_paginate_txn,
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"presence_stream",
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orderby="stream_id",
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start=offset,
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limit=limit,
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exclude_keyvalues=exclude_keyvalues,
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retcols=(
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"user_id",
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"state",
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"last_active_ts",
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"last_federation_update_ts",
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"last_user_sync_ts",
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"status_msg",
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"currently_active",
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),
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order_direction="ASC",
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)
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for row in rows:
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users_to_state[row["user_id"]] = UserPresenceState(**row)
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# We've run out of updates to query
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if len(rows) < limit:
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break
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offset += limit
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return users_to_state
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def get_current_presence_token(self):
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return self._presence_id_gen.get_current_token()
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