384 lines
14 KiB
Python
384 lines
14 KiB
Python
# Copyright 2014-2016 OpenMarket Ltd
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
from typing import TYPE_CHECKING, Dict, Iterable, List, Tuple
|
|
|
|
from synapse.api.presence import PresenceState, UserPresenceState
|
|
from synapse.replication.tcp.streams import PresenceStream
|
|
from synapse.storage._base import SQLBaseStore, make_in_list_sql_clause
|
|
from synapse.storage.database import DatabasePool
|
|
from synapse.storage.engines import PostgresEngine
|
|
from synapse.storage.types import Connection
|
|
from synapse.storage.util.id_generators import MultiWriterIdGenerator, StreamIdGenerator
|
|
from synapse.util.caches.descriptors import cached, cachedList
|
|
from synapse.util.caches.stream_change_cache import StreamChangeCache
|
|
from synapse.util.iterutils import batch_iter
|
|
|
|
if TYPE_CHECKING:
|
|
from synapse.server import HomeServer
|
|
|
|
|
|
class PresenceBackgroundUpdateStore(SQLBaseStore):
|
|
def __init__(
|
|
self,
|
|
database: DatabasePool,
|
|
db_conn: Connection,
|
|
hs: "HomeServer",
|
|
):
|
|
super().__init__(database, db_conn, hs)
|
|
|
|
# Used by `PresenceStore._get_active_presence()`
|
|
self.db_pool.updates.register_background_index_update(
|
|
"presence_stream_not_offline_index",
|
|
index_name="presence_stream_state_not_offline_idx",
|
|
table="presence_stream",
|
|
columns=["state"],
|
|
where_clause="state != 'offline'",
|
|
)
|
|
|
|
|
|
class PresenceStore(PresenceBackgroundUpdateStore):
|
|
def __init__(
|
|
self,
|
|
database: DatabasePool,
|
|
db_conn: Connection,
|
|
hs: "HomeServer",
|
|
):
|
|
super().__init__(database, db_conn, hs)
|
|
|
|
self._can_persist_presence = (
|
|
hs.get_instance_name() in hs.config.worker.writers.presence
|
|
)
|
|
|
|
if isinstance(database.engine, PostgresEngine):
|
|
self._presence_id_gen = MultiWriterIdGenerator(
|
|
db_conn=db_conn,
|
|
db=database,
|
|
stream_name="presence_stream",
|
|
instance_name=self._instance_name,
|
|
tables=[("presence_stream", "instance_name", "stream_id")],
|
|
sequence_name="presence_stream_sequence",
|
|
writers=hs.config.worker.writers.presence,
|
|
)
|
|
else:
|
|
self._presence_id_gen = StreamIdGenerator(
|
|
db_conn, "presence_stream", "stream_id"
|
|
)
|
|
|
|
self.hs = hs
|
|
self._presence_on_startup = self._get_active_presence(db_conn)
|
|
|
|
presence_cache_prefill, min_presence_val = self.db_pool.get_cache_dict(
|
|
db_conn,
|
|
"presence_stream",
|
|
entity_column="user_id",
|
|
stream_column="stream_id",
|
|
max_value=self._presence_id_gen.get_current_token(),
|
|
)
|
|
self.presence_stream_cache = StreamChangeCache(
|
|
"PresenceStreamChangeCache",
|
|
min_presence_val,
|
|
prefilled_cache=presence_cache_prefill,
|
|
)
|
|
|
|
async def update_presence(self, presence_states) -> Tuple[int, int]:
|
|
assert self._can_persist_presence
|
|
|
|
stream_ordering_manager = self._presence_id_gen.get_next_mult(
|
|
len(presence_states)
|
|
)
|
|
|
|
async with stream_ordering_manager as stream_orderings:
|
|
await self.db_pool.runInteraction(
|
|
"update_presence",
|
|
self._update_presence_txn,
|
|
stream_orderings,
|
|
presence_states,
|
|
)
|
|
|
|
return stream_orderings[-1], self._presence_id_gen.get_current_token()
|
|
|
|
def _update_presence_txn(self, txn, stream_orderings, presence_states):
|
|
for stream_id, state in zip(stream_orderings, presence_states):
|
|
txn.call_after(
|
|
self.presence_stream_cache.entity_has_changed, state.user_id, stream_id
|
|
)
|
|
txn.call_after(self._get_presence_for_user.invalidate, (state.user_id,))
|
|
|
|
# Delete old rows to stop database from getting really big
|
|
sql = "DELETE FROM presence_stream WHERE stream_id < ? AND "
|
|
|
|
for states in batch_iter(presence_states, 50):
|
|
clause, args = make_in_list_sql_clause(
|
|
self.database_engine, "user_id", [s.user_id for s in states]
|
|
)
|
|
txn.execute(sql + clause, [stream_id] + list(args))
|
|
|
|
# Actually insert new rows
|
|
self.db_pool.simple_insert_many_txn(
|
|
txn,
|
|
table="presence_stream",
|
|
values=[
|
|
{
|
|
"stream_id": stream_id,
|
|
"user_id": state.user_id,
|
|
"state": state.state,
|
|
"last_active_ts": state.last_active_ts,
|
|
"last_federation_update_ts": state.last_federation_update_ts,
|
|
"last_user_sync_ts": state.last_user_sync_ts,
|
|
"status_msg": state.status_msg,
|
|
"currently_active": state.currently_active,
|
|
"instance_name": self._instance_name,
|
|
}
|
|
for stream_id, state in zip(stream_orderings, presence_states)
|
|
],
|
|
)
|
|
|
|
async def get_all_presence_updates(
|
|
self, instance_name: str, last_id: int, current_id: int, limit: int
|
|
) -> Tuple[List[Tuple[int, list]], int, bool]:
|
|
"""Get updates for presence replication stream.
|
|
|
|
Args:
|
|
instance_name: The writer we want to fetch updates from. Unused
|
|
here since there is only ever one writer.
|
|
last_id: The token to fetch updates from. Exclusive.
|
|
current_id: The token to fetch updates up to. Inclusive.
|
|
limit: The requested limit for the number of rows to return. The
|
|
function may return more or fewer rows.
|
|
|
|
Returns:
|
|
A tuple consisting of: the updates, a token to use to fetch
|
|
subsequent updates, and whether we returned fewer rows than exists
|
|
between the requested tokens due to the limit.
|
|
|
|
The token returned can be used in a subsequent call to this
|
|
function to get further updatees.
|
|
|
|
The updates are a list of 2-tuples of stream ID and the row data
|
|
"""
|
|
|
|
if last_id == current_id:
|
|
return [], current_id, False
|
|
|
|
def get_all_presence_updates_txn(txn):
|
|
sql = """
|
|
SELECT stream_id, user_id, state, last_active_ts,
|
|
last_federation_update_ts, last_user_sync_ts,
|
|
status_msg,
|
|
currently_active
|
|
FROM presence_stream
|
|
WHERE ? < stream_id AND stream_id <= ?
|
|
ORDER BY stream_id ASC
|
|
LIMIT ?
|
|
"""
|
|
txn.execute(sql, (last_id, current_id, limit))
|
|
updates = [(row[0], row[1:]) for row in txn]
|
|
|
|
upper_bound = current_id
|
|
limited = False
|
|
if len(updates) >= limit:
|
|
upper_bound = updates[-1][0]
|
|
limited = True
|
|
|
|
return updates, upper_bound, limited
|
|
|
|
return await self.db_pool.runInteraction(
|
|
"get_all_presence_updates", get_all_presence_updates_txn
|
|
)
|
|
|
|
@cached()
|
|
def _get_presence_for_user(self, user_id):
|
|
raise NotImplementedError()
|
|
|
|
@cachedList(
|
|
cached_method_name="_get_presence_for_user",
|
|
list_name="user_ids",
|
|
num_args=1,
|
|
)
|
|
async def get_presence_for_users(self, user_ids):
|
|
rows = await self.db_pool.simple_select_many_batch(
|
|
table="presence_stream",
|
|
column="user_id",
|
|
iterable=user_ids,
|
|
keyvalues={},
|
|
retcols=(
|
|
"user_id",
|
|
"state",
|
|
"last_active_ts",
|
|
"last_federation_update_ts",
|
|
"last_user_sync_ts",
|
|
"status_msg",
|
|
"currently_active",
|
|
),
|
|
desc="get_presence_for_users",
|
|
)
|
|
|
|
for row in rows:
|
|
row["currently_active"] = bool(row["currently_active"])
|
|
|
|
return {row["user_id"]: UserPresenceState(**row) for row in rows}
|
|
|
|
async def should_user_receive_full_presence_with_token(
|
|
self,
|
|
user_id: str,
|
|
from_token: int,
|
|
) -> bool:
|
|
"""Check whether the given user should receive full presence using the stream token
|
|
they're updating from.
|
|
|
|
Args:
|
|
user_id: The ID of the user to check.
|
|
from_token: The stream token included in their /sync token.
|
|
|
|
Returns:
|
|
True if the user should have full presence sent to them, False otherwise.
|
|
"""
|
|
|
|
def _should_user_receive_full_presence_with_token_txn(txn):
|
|
sql = """
|
|
SELECT 1 FROM users_to_send_full_presence_to
|
|
WHERE user_id = ?
|
|
AND presence_stream_id >= ?
|
|
"""
|
|
txn.execute(sql, (user_id, from_token))
|
|
return bool(txn.fetchone())
|
|
|
|
return await self.db_pool.runInteraction(
|
|
"should_user_receive_full_presence_with_token",
|
|
_should_user_receive_full_presence_with_token_txn,
|
|
)
|
|
|
|
async def add_users_to_send_full_presence_to(self, user_ids: Iterable[str]):
|
|
"""Adds to the list of users who should receive a full snapshot of presence
|
|
upon their next sync.
|
|
|
|
Args:
|
|
user_ids: An iterable of user IDs.
|
|
"""
|
|
# Add user entries to the table, updating the presence_stream_id column if the user already
|
|
# exists in the table.
|
|
await self.db_pool.simple_upsert_many(
|
|
table="users_to_send_full_presence_to",
|
|
key_names=("user_id",),
|
|
key_values=[(user_id,) for user_id in user_ids],
|
|
value_names=("presence_stream_id",),
|
|
# We save the current presence stream ID token along with the user ID entry so
|
|
# that when a user /sync's, even if they syncing multiple times across separate
|
|
# devices at different times, each device will receive full presence once - when
|
|
# the presence stream ID in their sync token is less than the one in the table
|
|
# for their user ID.
|
|
value_values=(
|
|
(self._presence_id_gen.get_current_token(),) for _ in user_ids
|
|
),
|
|
desc="add_users_to_send_full_presence_to",
|
|
)
|
|
|
|
async def get_presence_for_all_users(
|
|
self,
|
|
include_offline: bool = True,
|
|
) -> Dict[str, UserPresenceState]:
|
|
"""Retrieve the current presence state for all users.
|
|
|
|
Note that the presence_stream table is culled frequently, so it should only
|
|
contain the latest presence state for each user.
|
|
|
|
Args:
|
|
include_offline: Whether to include offline presence states
|
|
|
|
Returns:
|
|
A dict of user IDs to their current UserPresenceState.
|
|
"""
|
|
users_to_state = {}
|
|
|
|
exclude_keyvalues = None
|
|
if not include_offline:
|
|
# Exclude offline presence state
|
|
exclude_keyvalues = {"state": "offline"}
|
|
|
|
# This may be a very heavy database query.
|
|
# We paginate in order to not block a database connection.
|
|
limit = 100
|
|
offset = 0
|
|
while True:
|
|
rows = await self.db_pool.runInteraction(
|
|
"get_presence_for_all_users",
|
|
self.db_pool.simple_select_list_paginate_txn,
|
|
"presence_stream",
|
|
orderby="stream_id",
|
|
start=offset,
|
|
limit=limit,
|
|
exclude_keyvalues=exclude_keyvalues,
|
|
retcols=(
|
|
"user_id",
|
|
"state",
|
|
"last_active_ts",
|
|
"last_federation_update_ts",
|
|
"last_user_sync_ts",
|
|
"status_msg",
|
|
"currently_active",
|
|
),
|
|
order_direction="ASC",
|
|
)
|
|
|
|
for row in rows:
|
|
users_to_state[row["user_id"]] = UserPresenceState(**row)
|
|
|
|
# We've run out of updates to query
|
|
if len(rows) < limit:
|
|
break
|
|
|
|
offset += limit
|
|
|
|
return users_to_state
|
|
|
|
def get_current_presence_token(self):
|
|
return self._presence_id_gen.get_current_token()
|
|
|
|
def _get_active_presence(self, db_conn: Connection):
|
|
"""Fetch non-offline presence from the database so that we can register
|
|
the appropriate time outs.
|
|
"""
|
|
|
|
# The `presence_stream_state_not_offline_idx` index should be used for this
|
|
# query.
|
|
sql = (
|
|
"SELECT user_id, state, last_active_ts, last_federation_update_ts,"
|
|
" last_user_sync_ts, status_msg, currently_active FROM presence_stream"
|
|
" WHERE state != ?"
|
|
)
|
|
|
|
txn = db_conn.cursor()
|
|
txn.execute(sql, (PresenceState.OFFLINE,))
|
|
rows = self.db_pool.cursor_to_dict(txn)
|
|
txn.close()
|
|
|
|
for row in rows:
|
|
row["currently_active"] = bool(row["currently_active"])
|
|
|
|
return [UserPresenceState(**row) for row in rows]
|
|
|
|
def take_presence_startup_info(self):
|
|
active_on_startup = self._presence_on_startup
|
|
self._presence_on_startup = None
|
|
return active_on_startup
|
|
|
|
def process_replication_rows(self, stream_name, instance_name, token, rows):
|
|
if stream_name == PresenceStream.NAME:
|
|
self._presence_id_gen.advance(instance_name, token)
|
|
for row in rows:
|
|
self.presence_stream_cache.entity_has_changed(row.user_id, token)
|
|
self._get_presence_for_user.invalidate((row.user_id,))
|
|
return super().process_replication_rows(stream_name, instance_name, token, rows)
|