synapse-product/synapse/storage/databases/main/receipts.py

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# Copyright 2014-2016 OpenMarket Ltd
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# Copyright 2018 New Vector 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.
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import logging
from typing import (
TYPE_CHECKING,
Any,
Collection,
Dict,
Iterable,
List,
Optional,
Set,
Tuple,
cast,
)
from synapse.api.constants import ReceiptTypes
from synapse.replication.slave.storage._slaved_id_tracker import SlavedIdTracker
from synapse.replication.tcp.streams import ReceiptsStream
from synapse.storage._base import SQLBaseStore, db_to_json, make_in_list_sql_clause
from synapse.storage.database import (
DatabasePool,
LoggingDatabaseConnection,
LoggingTransaction,
)
from synapse.storage.engines import PostgresEngine
from synapse.storage.util.id_generators import (
AbstractStreamIdTracker,
MultiWriterIdGenerator,
StreamIdGenerator,
)
from synapse.types import JsonDict
from synapse.util import json_encoder
from synapse.util.caches.descriptors import cached, cachedList
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from synapse.util.caches.stream_change_cache import StreamChangeCache
if TYPE_CHECKING:
from synapse.server import HomeServer
logger = logging.getLogger(__name__)
class ReceiptsWorkerStore(SQLBaseStore):
def __init__(
self,
database: DatabasePool,
db_conn: LoggingDatabaseConnection,
hs: "HomeServer",
):
self._instance_name = hs.get_instance_name()
self._receipts_id_gen: AbstractStreamIdTracker
if isinstance(database.engine, PostgresEngine):
self._can_write_to_receipts = (
self._instance_name in hs.config.worker.writers.receipts
)
self._receipts_id_gen = MultiWriterIdGenerator(
db_conn=db_conn,
db=database,
stream_name="receipts",
instance_name=self._instance_name,
tables=[("receipts_linearized", "instance_name", "stream_id")],
sequence_name="receipts_sequence",
writers=hs.config.worker.writers.receipts,
)
else:
self._can_write_to_receipts = True
# We shouldn't be running in worker mode with SQLite, but its useful
# to support it for unit tests.
#
# If this process is the writer than we need to use
# `StreamIdGenerator`, otherwise we use `SlavedIdTracker` which gets
# updated over replication. (Multiple writers are not supported for
# SQLite).
if hs.get_instance_name() in hs.config.worker.writers.receipts:
self._receipts_id_gen = StreamIdGenerator(
db_conn, "receipts_linearized", "stream_id"
)
else:
self._receipts_id_gen = SlavedIdTracker(
db_conn, "receipts_linearized", "stream_id"
)
super().__init__(database, db_conn, hs)
max_receipts_stream_id = self.get_max_receipt_stream_id()
receipts_stream_prefill, min_receipts_stream_id = self.db_pool.get_cache_dict(
db_conn,
"receipts_linearized",
entity_column="room_id",
stream_column="stream_id",
max_value=max_receipts_stream_id,
limit=10000,
)
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self._receipts_stream_cache = StreamChangeCache(
"ReceiptsRoomChangeCache",
min_receipts_stream_id,
prefilled_cache=receipts_stream_prefill,
)
def get_max_receipt_stream_id(self) -> int:
"""Get the current max stream ID for receipts stream"""
return self._receipts_id_gen.get_current_token()
@cached()
async def get_users_with_read_receipts_in_room(self, room_id: str) -> Set[str]:
receipts = await self.get_receipts_for_room(room_id, ReceiptTypes.READ)
return {r["user_id"] for r in receipts}
@cached()
async def get_receipts_for_room(
self, room_id: str, receipt_type: str
) -> List[Dict[str, Any]]:
"""
Fetch the event IDs for the latest receipt for all users in a room with the given receipt type.
Args:
room_id: The room ID to fetch the receipt for.
receipt_type: The receipt type to fetch.
Returns:
A list of dictionaries, one for each user ID. Each dictionary
contains a user ID and the event ID of that user's latest receipt.
"""
return await self.db_pool.simple_select_list(
table="receipts_linearized",
keyvalues={"room_id": room_id, "receipt_type": receipt_type},
retcols=("user_id", "event_id"),
desc="get_receipts_for_room",
)
async def get_last_receipt_event_id_for_user(
self, user_id: str, room_id: str, receipt_types: Iterable[str]
) -> Optional[str]:
"""
Fetch the event ID for the latest receipt in a room with one of the given receipt types.
Args:
user_id: The user to fetch receipts for.
room_id: The room ID to fetch the receipt for.
receipt_type: The receipt types to fetch. Earlier receipt types
are given priority if multiple receipts point to the same event.
Returns:
The latest receipt, if one exists.
"""
latest_event_id: Optional[str] = None
latest_stream_ordering = 0
for receipt_type in receipt_types:
result = await self._get_last_receipt_event_id_for_user(
user_id, room_id, receipt_type
)
if result is None:
continue
event_id, stream_ordering = result
if latest_event_id is None or latest_stream_ordering < stream_ordering:
latest_event_id = event_id
latest_stream_ordering = stream_ordering
return latest_event_id
@cached()
async def _get_last_receipt_event_id_for_user(
self, user_id: str, room_id: str, receipt_type: str
) -> Optional[Tuple[str, int]]:
"""
Fetch the event ID and stream ordering for the latest receipt.
Args:
user_id: The user to fetch receipts for.
room_id: The room ID to fetch the receipt for.
receipt_type: The receipt type to fetch.
Returns:
The event ID and stream ordering of the latest receipt, if one exists;
otherwise `None`.
"""
sql = """
SELECT event_id, stream_ordering
FROM receipts_linearized
INNER JOIN events USING (room_id, event_id)
WHERE user_id = ?
AND room_id = ?
AND receipt_type = ?
"""
def f(txn: LoggingTransaction) -> Optional[Tuple[str, int]]:
txn.execute(sql, (user_id, room_id, receipt_type))
return cast(Optional[Tuple[str, int]], txn.fetchone())
return await self.db_pool.runInteraction("get_own_receipt_for_user", f)
async def get_receipts_for_user(
self, user_id: str, receipt_types: Iterable[str]
) -> Dict[str, str]:
"""
Fetch the event IDs for the latest receipts sent by the given user.
Args:
user_id: The user to fetch receipts for.
receipt_types: The receipt types to check.
Returns:
A map of room ID to the event ID of the latest receipt for that room.
If the user has not sent a receipt to a room then it will not appear
in the returned dictionary.
"""
results = await self.get_receipts_for_user_with_orderings(
user_id, receipt_types
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)
# Reduce the result to room ID -> event ID.
return {
room_id: room_result["event_id"] for room_id, room_result in results.items()
}
async def get_receipts_for_user_with_orderings(
self, user_id: str, receipt_types: Iterable[str]
) -> JsonDict:
"""
Fetch receipts for all rooms that the given user is joined to.
Args:
user_id: The user to fetch receipts for.
receipt_types: The receipt types to fetch. Earlier receipt types
are given priority if multiple receipts point to the same event.
Returns:
A map of room ID to the latest receipt (for the given types).
"""
results: JsonDict = {}
for receipt_type in receipt_types:
partial_result = await self._get_receipts_for_user_with_orderings(
user_id, receipt_type
)
for room_id, room_result in partial_result.items():
# If the room has not yet been seen, or the receipt is newer,
# use it.
if (
room_id not in results
or results[room_id]["stream_ordering"]
< room_result["stream_ordering"]
):
results[room_id] = room_result
return results
@cached()
async def _get_receipts_for_user_with_orderings(
self, user_id: str, receipt_type: str
) -> JsonDict:
"""
Fetch receipts for all rooms that the given user is joined to.
Args:
user_id: The user to fetch receipts for.
receipt_type: The receipt type to fetch.
Returns:
A map of room ID to the latest receipt information.
"""
def f(txn: LoggingTransaction) -> List[Tuple[str, str, int, int]]:
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sql = (
"SELECT rl.room_id, rl.event_id,"
" e.topological_ordering, e.stream_ordering"
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" FROM receipts_linearized AS rl"
" INNER JOIN events AS e USING (room_id, event_id)"
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" WHERE rl.room_id = e.room_id"
" AND rl.event_id = e.event_id"
" AND user_id = ?"
" AND receipt_type = ?"
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)
txn.execute(sql, (user_id, receipt_type))
return cast(List[Tuple[str, str, int, int]], txn.fetchall())
rows = await self.db_pool.runInteraction(
"get_receipts_for_user_with_orderings", f
)
return {
row[0]: {
"event_id": row[1],
"topological_ordering": row[2],
"stream_ordering": row[3],
}
for row in rows
}
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async def get_linearized_receipts_for_rooms(
self, room_ids: Iterable[str], to_key: int, from_key: Optional[int] = None
) -> List[dict]:
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"""Get receipts for multiple rooms for sending to clients.
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Args:
room_id: The room IDs to fetch receipts of.
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to_key: Max stream id to fetch receipts up to.
from_key: Min stream id to fetch receipts from. None fetches
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from the start.
Returns:
A list of receipts.
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"""
room_ids = set(room_ids)
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if from_key is not None:
# Only ask the database about rooms where there have been new
# receipts added since `from_key`
room_ids = self._receipts_stream_cache.get_entities_changed(
room_ids, from_key
)
results = await self._get_linearized_receipts_for_rooms(
room_ids, to_key, from_key=from_key
)
return [ev for res in results.values() for ev in res]
async def get_linearized_receipts_for_room(
self, room_id: str, to_key: int, from_key: Optional[int] = None
) -> List[dict]:
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"""Get receipts for a single room for sending to clients.
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Args:
room_ids: The room id.
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to_key: Max stream id to fetch receipts up to.
from_key: Min stream id to fetch receipts from. None fetches
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from the start.
Returns:
A list of receipts.
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"""
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if from_key is not None:
# Check the cache first to see if any new receipts have been added
# since`from_key`. If not we can no-op.
if not self._receipts_stream_cache.has_entity_changed(room_id, from_key):
return []
return await self._get_linearized_receipts_for_room(room_id, to_key, from_key)
@cached(tree=True)
async def _get_linearized_receipts_for_room(
self, room_id: str, to_key: int, from_key: Optional[int] = None
) -> List[JsonDict]:
"""See get_linearized_receipts_for_room"""
def f(txn: LoggingTransaction) -> List[Dict[str, Any]]:
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if from_key:
sql = (
"SELECT * FROM receipts_linearized WHERE"
" room_id = ? AND stream_id > ? AND stream_id <= ?"
)
txn.execute(sql, (room_id, from_key, to_key))
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else:
sql = (
"SELECT * FROM receipts_linearized WHERE"
" room_id = ? AND stream_id <= ?"
)
txn.execute(sql, (room_id, to_key))
rows = self.db_pool.cursor_to_dict(txn)
return rows
rows = await self.db_pool.runInteraction("get_linearized_receipts_for_room", f)
if not rows:
return []
content: JsonDict = {}
for row in rows:
content.setdefault(row["event_id"], {}).setdefault(row["receipt_type"], {})[
row["user_id"]
] = db_to_json(row["data"])
return [{"type": "m.receipt", "room_id": room_id, "content": content}]
@cachedList(
cached_method_name="_get_linearized_receipts_for_room",
list_name="room_ids",
num_args=3,
)
async def _get_linearized_receipts_for_rooms(
self, room_ids: Collection[str], to_key: int, from_key: Optional[int] = None
) -> Dict[str, List[JsonDict]]:
if not room_ids:
return {}
def f(txn: LoggingTransaction) -> List[Dict[str, Any]]:
if from_key:
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sql = """
SELECT * FROM receipts_linearized WHERE
stream_id > ? AND stream_id <= ? AND
"""
clause, args = make_in_list_sql_clause(
self.database_engine, "room_id", room_ids
)
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txn.execute(sql + clause, [from_key, to_key] + list(args))
else:
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sql = """
SELECT * FROM receipts_linearized WHERE
stream_id <= ? AND
"""
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clause, args = make_in_list_sql_clause(
self.database_engine, "room_id", room_ids
)
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txn.execute(sql + clause, [to_key] + list(args))
return self.db_pool.cursor_to_dict(txn)
txn_results = await self.db_pool.runInteraction(
"_get_linearized_receipts_for_rooms", f
)
results: JsonDict = {}
for row in txn_results:
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# We want a single event per room, since we want to batch the
# receipts by room, event and type.
room_event = results.setdefault(
row["room_id"],
{"type": "m.receipt", "room_id": row["room_id"], "content": {}},
)
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# The content is of the form:
# {"$foo:bar": { "read": { "@user:host": <receipt> }, .. }, .. }
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event_entry = room_event["content"].setdefault(row["event_id"], {})
receipt_type = event_entry.setdefault(row["receipt_type"], {})
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receipt_type[row["user_id"]] = db_to_json(row["data"])
results = {
room_id: [results[room_id]] if room_id in results else []
for room_id in room_ids
}
return results
@cached(
num_args=2,
)
async def get_linearized_receipts_for_all_rooms(
self, to_key: int, from_key: Optional[int] = None
) -> Dict[str, JsonDict]:
"""Get receipts for all rooms between two stream_ids, up
to a limit of the latest 100 read receipts.
Args:
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to_key: Max stream id to fetch receipts up to.
from_key: Min stream id to fetch receipts from. None fetches
from the start.
Returns:
A dictionary of roomids to a list of receipts.
"""
def f(txn: LoggingTransaction) -> List[Dict[str, Any]]:
if from_key:
sql = """
SELECT * FROM receipts_linearized WHERE
stream_id > ? AND stream_id <= ?
ORDER BY stream_id DESC
LIMIT 100
"""
txn.execute(sql, [from_key, to_key])
else:
sql = """
SELECT * FROM receipts_linearized WHERE
stream_id <= ?
ORDER BY stream_id DESC
LIMIT 100
"""
txn.execute(sql, [to_key])
return self.db_pool.cursor_to_dict(txn)
txn_results = await self.db_pool.runInteraction(
"get_linearized_receipts_for_all_rooms", f
)
results: JsonDict = {}
for row in txn_results:
# We want a single event per room, since we want to batch the
# receipts by room, event and type.
room_event = results.setdefault(
row["room_id"],
{"type": "m.receipt", "room_id": row["room_id"], "content": {}},
)
# The content is of the form:
# {"$foo:bar": { "read": { "@user:host": <receipt> }, .. }, .. }
event_entry = room_event["content"].setdefault(row["event_id"], {})
receipt_type = event_entry.setdefault(row["receipt_type"], {})
receipt_type[row["user_id"]] = db_to_json(row["data"])
return results
async def get_users_sent_receipts_between(
self, last_id: int, current_id: int
) -> List[str]:
"""Get all users who sent receipts between `last_id` exclusive and
`current_id` inclusive.
Returns:
The list of users.
"""
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if last_id == current_id:
return []
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def _get_users_sent_receipts_between_txn(txn: LoggingTransaction) -> List[str]:
sql = """
SELECT DISTINCT user_id FROM receipts_linearized
WHERE ? < stream_id AND stream_id <= ?
"""
txn.execute(sql, (last_id, current_id))
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return [r[0] for r in txn]
return await self.db_pool.runInteraction(
"get_users_sent_receipts_between", _get_users_sent_receipts_between_txn
)
async def get_all_updated_receipts(
self, instance_name: str, last_id: int, current_id: int, limit: int
) -> Tuple[List[Tuple[int, list]], int, bool]:
"""Get updates for receipts 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_updated_receipts_txn(
txn: LoggingTransaction,
) -> Tuple[List[Tuple[int, list]], int, bool]:
sql = """
SELECT stream_id, room_id, receipt_type, user_id, event_id, data
FROM receipts_linearized
WHERE ? < stream_id AND stream_id <= ?
ORDER BY stream_id ASC
LIMIT ?
"""
txn.execute(sql, (last_id, current_id, limit))
updates = cast(
List[Tuple[int, list]],
[(r[0], r[1:5] + (db_to_json(r[5]),)) for r in txn],
)
limited = False
upper_bound = current_id
if len(updates) == limit:
limited = True
upper_bound = updates[-1][0]
return updates, upper_bound, limited
return await self.db_pool.runInteraction(
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"get_all_updated_receipts", get_all_updated_receipts_txn
)
def _invalidate_get_users_with_receipts_in_room(
self, room_id: str, receipt_type: str, user_id: str
) -> None:
if receipt_type != ReceiptTypes.READ:
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return
res = self.get_users_with_read_receipts_in_room.cache.get_immediate(
room_id, None, update_metrics=False
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)
if res and user_id in res:
# We'd only be adding to the set, so no point invalidating if the
# user is already there
return
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self.get_users_with_read_receipts_in_room.invalidate((room_id,))
def invalidate_caches_for_receipt(
self, room_id: str, receipt_type: str, user_id: str
) -> None:
self._get_receipts_for_user_with_orderings.invalidate((user_id, receipt_type))
self._get_linearized_receipts_for_room.invalidate((room_id,))
self._get_last_receipt_event_id_for_user.invalidate(
(user_id, room_id, receipt_type)
)
self._invalidate_get_users_with_receipts_in_room(room_id, receipt_type, user_id)
self.get_receipts_for_room.invalidate((room_id, receipt_type))
def process_replication_rows(
self,
stream_name: str,
instance_name: str,
token: int,
rows: Iterable[Any],
) -> None:
if stream_name == ReceiptsStream.NAME:
self._receipts_id_gen.advance(instance_name, token)
for row in rows:
self.invalidate_caches_for_receipt(
row.room_id, row.receipt_type, row.user_id
)
self._receipts_stream_cache.entity_has_changed(row.room_id, token)
return super().process_replication_rows(stream_name, instance_name, token, rows)
def insert_linearized_receipt_txn(
self,
txn: LoggingTransaction,
room_id: str,
receipt_type: str,
user_id: str,
event_id: str,
data: JsonDict,
stream_id: int,
) -> Optional[int]:
"""Inserts a receipt into the database if it's newer than the current one.
Returns:
None if the receipt is older than the current receipt
otherwise, the rx timestamp of the event that the receipt corresponds to
(or 0 if the event is unknown)
"""
assert self._can_write_to_receipts
res = self.db_pool.simple_select_one_txn(
txn,
table="events",
retcols=["stream_ordering", "received_ts"],
keyvalues={"event_id": event_id},
allow_none=True,
)
stream_ordering = int(res["stream_ordering"]) if res else None
rx_ts = res["received_ts"] if res else 0
# We don't want to clobber receipts for more recent events, so we
# have to compare orderings of existing receipts
if stream_ordering is not None:
sql = (
"SELECT stream_ordering, event_id FROM events"
" INNER JOIN receipts_linearized AS r USING (event_id, room_id)"
" WHERE r.room_id = ? AND r.receipt_type = ? AND r.user_id = ?"
)
txn.execute(sql, (room_id, receipt_type, user_id))
for so, eid in txn:
if int(so) >= stream_ordering:
logger.debug(
"Ignoring new receipt for %s in favour of existing "
"one for later event %s",
event_id,
eid,
)
return None
txn.call_after(
self.invalidate_caches_for_receipt, room_id, receipt_type, user_id
)
txn.call_after(
self._receipts_stream_cache.entity_has_changed, room_id, stream_id
)
self.db_pool.simple_upsert_txn(
txn,
table="receipts_linearized",
keyvalues={
"room_id": room_id,
"receipt_type": receipt_type,
"user_id": user_id,
},
values={
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"stream_id": stream_id,
"event_id": event_id,
"data": json_encoder.encode(data),
},
# receipts_linearized has a unique constraint on
# (user_id, room_id, receipt_type), so no need to lock
lock=False,
)
if (
receipt_type in (ReceiptTypes.READ, ReceiptTypes.READ_PRIVATE)
and stream_ordering is not None
):
self._remove_old_push_actions_before_txn( # type: ignore[attr-defined]
txn, room_id=room_id, user_id=user_id, stream_ordering=stream_ordering
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)
return rx_ts
async def insert_receipt(
self,
room_id: str,
receipt_type: str,
user_id: str,
event_ids: List[str],
data: dict,
) -> Optional[Tuple[int, int]]:
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"""Insert a receipt, either from local client or remote server.
Automatically does conversion between linearized and graph
representations.
Returns:
The new receipts stream ID and token, if the receipt is newer than
what was previously persisted. None, otherwise.
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"""
assert self._can_write_to_receipts
if not event_ids:
return None
if len(event_ids) == 1:
linearized_event_id = event_ids[0]
else:
# we need to points in graph -> linearized form.
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# TODO: Make this better.
def graph_to_linear(txn: LoggingTransaction) -> str:
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clause, args = make_in_list_sql_clause(
self.database_engine, "event_id", event_ids
)
sql = """
SELECT event_id WHERE room_id = ? AND stream_ordering IN (
SELECT max(stream_ordering) WHERE %s
)
""" % (
clause,
)
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txn.execute(sql, [room_id] + list(args))
rows = txn.fetchall()
if rows:
return rows[0][0]
else:
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raise RuntimeError("Unrecognized event_ids: %r" % (event_ids,))
linearized_event_id = await self.db_pool.runInteraction(
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"insert_receipt_conv", graph_to_linear
)
async with self._receipts_id_gen.get_next() as stream_id: # type: ignore[attr-defined]
event_ts = await self.db_pool.runInteraction(
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"insert_linearized_receipt",
self.insert_linearized_receipt_txn,
room_id,
receipt_type,
user_id,
linearized_event_id,
data,
stream_id=stream_id,
)
# If the receipt was older than the currently persisted one, nothing to do.
if event_ts is None:
return None
now = self._clock.time_msec()
logger.debug(
"RR for event %s in %s (%i ms old)",
linearized_event_id,
room_id,
now - event_ts,
)
await self.insert_graph_receipt(room_id, receipt_type, user_id, event_ids, data)
max_persisted_id = self._receipts_id_gen.get_current_token()
return stream_id, max_persisted_id
async def insert_graph_receipt(
self,
room_id: str,
receipt_type: str,
user_id: str,
event_ids: List[str],
data: JsonDict,
) -> None:
assert self._can_write_to_receipts
await self.db_pool.runInteraction(
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"insert_graph_receipt",
self.insert_graph_receipt_txn,
room_id,
receipt_type,
user_id,
event_ids,
data,
)
def insert_graph_receipt_txn(
self,
txn: LoggingTransaction,
room_id: str,
receipt_type: str,
user_id: str,
event_ids: List[str],
data: JsonDict,
) -> None:
assert self._can_write_to_receipts
txn.call_after(self.get_receipts_for_room.invalidate, (room_id, receipt_type))
txn.call_after(
self._invalidate_get_users_with_receipts_in_room,
room_id,
receipt_type,
user_id,
)
txn.call_after(
self._get_receipts_for_user_with_orderings.invalidate,
(user_id, receipt_type),
)
# FIXME: This shouldn't invalidate the whole cache
txn.call_after(self._get_linearized_receipts_for_room.invalidate, (room_id,))
self.db_pool.simple_delete_txn(
txn,
table="receipts_graph",
keyvalues={
"room_id": room_id,
"receipt_type": receipt_type,
"user_id": user_id,
},
)
self.db_pool.simple_insert_txn(
txn,
table="receipts_graph",
values={
"room_id": room_id,
"receipt_type": receipt_type,
"user_id": user_id,
"event_ids": json_encoder.encode(event_ids),
"data": json_encoder.encode(data),
},
)
class ReceiptsStore(ReceiptsWorkerStore):
pass