def test_get_entities_changed(self):
"""
StreamChangeCache.get_entities_changed will return the entities in the
given list that have changed since the provided stream ID. If the
stream position is earlier than the earliest known position, it will
return all of the entities queried for.
"""
cache = StreamChangeCache("#test", 1)
cache.entity_has_changed("*****@*****.**", 2)
cache.entity_has_changed("*****@*****.**", 3)
cache.entity_has_changed("*****@*****.**", 4)
# Query all the entries, but mid-way through the stream. We should only
# get the ones after that point.
self.assertEqual(
cache.get_entities_changed(
["*****@*****.**", "*****@*****.**", "*****@*****.**"], stream_pos=2
),
set(["*****@*****.**", "*****@*****.**"]),
)
# Query all the entries mid-way through the stream, but include one
# that doesn't exist in it. We should get back the one that doesn't
# exist, too.
self.assertEqual(
cache.get_entities_changed(
[
"*****@*****.**",
"*****@*****.**",
"*****@*****.**",
"*****@*****.**",
],
stream_pos=2,
),
set(["*****@*****.**", "*****@*****.**", "*****@*****.**"]),
)
# Query all the entries, but before the first known point. We will get
# all the entries we queried for, including ones that don't exist.
self.assertEqual(
cache.get_entities_changed(
[
"*****@*****.**",
"*****@*****.**",
"*****@*****.**",
"*****@*****.**",
],
stream_pos=0,
),
set(
[
"*****@*****.**",
"*****@*****.**",
"*****@*****.**",
"*****@*****.**",
]
),
)
class StreamWorkerStore(EventsWorkerStore, SQLBaseStore):
"""This is an abstract base class where subclasses must implement
`get_room_max_stream_ordering` and `get_room_min_stream_ordering`
which can be called in the initializer.
"""
__metaclass__ = abc.ABCMeta
def __init__(self, db_conn, hs):
super(StreamWorkerStore, self).__init__(db_conn, hs)
events_max = self.get_room_max_stream_ordering()
event_cache_prefill, min_event_val = self._get_cache_dict(
db_conn,
"events",
entity_column="room_id",
stream_column="stream_ordering",
max_value=events_max,
)
self._events_stream_cache = StreamChangeCache(
"EventsRoomStreamChangeCache",
min_event_val,
prefilled_cache=event_cache_prefill,
)
self._membership_stream_cache = StreamChangeCache(
"MembershipStreamChangeCache", events_max
)
self._stream_order_on_start = self.get_room_max_stream_ordering()
@abc.abstractmethod
def get_room_max_stream_ordering(self):
raise NotImplementedError()
@abc.abstractmethod
def get_room_min_stream_ordering(self):
raise NotImplementedError()
@defer.inlineCallbacks
def get_room_events_stream_for_rooms(
self, room_ids, from_key, to_key, limit=0, order='DESC'
):
"""Get new room events in stream ordering since `from_key`.
Args:
room_id (str)
from_key (str): Token from which no events are returned before
to_key (str): Token from which no events are returned after. (This
is typically the current stream token)
limit (int): Maximum number of events to return
order (str): Either "DESC" or "ASC". Determines which events are
returned when the result is limited. If "DESC" then the most
recent `limit` events are returned, otherwise returns the
oldest `limit` events.
Returns:
Deferred[dict[str,tuple[list[FrozenEvent], str]]]
A map from room id to a tuple containing:
- list of recent events in the room
- stream ordering key for the start of the chunk of events returned.
"""
from_id = RoomStreamToken.parse_stream_token(from_key).stream
room_ids = yield self._events_stream_cache.get_entities_changed(
room_ids, from_id
)
if not room_ids:
defer.returnValue({})
results = {}
room_ids = list(room_ids)
for rm_ids in (room_ids[i : i + 20] for i in range(0, len(room_ids), 20)):
res = yield make_deferred_yieldable(
defer.gatherResults(
[
run_in_background(
self.get_room_events_stream_for_room,
room_id,
from_key,
to_key,
limit,
order=order,
)
for room_id in rm_ids
],
consumeErrors=True,
)
)
results.update(dict(zip(rm_ids, res)))
defer.returnValue(results)
def get_rooms_that_changed(self, room_ids, from_key):
"""Given a list of rooms and a token, return rooms where there may have
been changes.
Args:
room_ids (list)
from_key (str): The room_key portion of a StreamToken
"""
from_key = RoomStreamToken.parse_stream_token(from_key).stream
return set(
room_id
for room_id in room_ids
if self._events_stream_cache.has_entity_changed(room_id, from_key)
)
@defer.inlineCallbacks
def get_room_events_stream_for_room(
self, room_id, from_key, to_key, limit=0, order='DESC'
):
"""Get new room events in stream ordering since `from_key`.
Args:
room_id (str)
from_key (str): Token from which no events are returned before
to_key (str): Token from which no events are returned after. (This
is typically the current stream token)
limit (int): Maximum number of events to return
order (str): Either "DESC" or "ASC". Determines which events are
returned when the result is limited. If "DESC" then the most
recent `limit` events are returned, otherwise returns the
oldest `limit` events.
Returns:
Deferred[tuple[list[FrozenEvent], str]]: Returns the list of
events (in ascending order) and the token from the start of
the chunk of events returned.
"""
if from_key == to_key:
defer.returnValue(([], from_key))
from_id = RoomStreamToken.parse_stream_token(from_key).stream
to_id = RoomStreamToken.parse_stream_token(to_key).stream
has_changed = yield self._events_stream_cache.has_entity_changed(
room_id, from_id
)
if not has_changed:
defer.returnValue(([], from_key))
def f(txn):
sql = (
"SELECT event_id, stream_ordering FROM events WHERE"
" room_id = ?"
" AND not outlier"
" AND stream_ordering > ? AND stream_ordering <= ?"
" ORDER BY stream_ordering %s LIMIT ?"
) % (order,)
txn.execute(sql, (room_id, from_id, to_id, limit))
rows = [_EventDictReturn(row[0], None, row[1]) for row in txn]
return rows
rows = yield self.runInteraction("get_room_events_stream_for_room", f)
ret = yield self.get_events_as_list([
r.event_id for r in rows], get_prev_content=True,
)
self._set_before_and_after(ret, rows, topo_order=from_id is None)
if order.lower() == "desc":
ret.reverse()
if rows:
key = "s%d" % min(r.stream_ordering for r in rows)
else:
# Assume we didn't get anything because there was nothing to
# get.
key = from_key
defer.returnValue((ret, key))
@defer.inlineCallbacks
def get_membership_changes_for_user(self, user_id, from_key, to_key):
from_id = RoomStreamToken.parse_stream_token(from_key).stream
to_id = RoomStreamToken.parse_stream_token(to_key).stream
if from_key == to_key:
defer.returnValue([])
if from_id:
has_changed = self._membership_stream_cache.has_entity_changed(
user_id, int(from_id)
)
if not has_changed:
defer.returnValue([])
def f(txn):
sql = (
"SELECT m.event_id, stream_ordering FROM events AS e,"
" room_memberships AS m"
" WHERE e.event_id = m.event_id"
" AND m.user_id = ?"
" AND e.stream_ordering > ? AND e.stream_ordering <= ?"
" ORDER BY e.stream_ordering ASC"
)
txn.execute(sql, (user_id, from_id, to_id))
rows = [_EventDictReturn(row[0], None, row[1]) for row in txn]
return rows
rows = yield self.runInteraction("get_membership_changes_for_user", f)
ret = yield self.get_events_as_list(
[r.event_id for r in rows], get_prev_content=True,
)
self._set_before_and_after(ret, rows, topo_order=False)
defer.returnValue(ret)
@defer.inlineCallbacks
def get_recent_events_for_room(self, room_id, limit, end_token):
"""Get the most recent events in the room in topological ordering.
Args:
room_id (str)
limit (int)
end_token (str): The stream token representing now.
Returns:
Deferred[tuple[list[FrozenEvent], str]]: Returns a list of
events and a token pointing to the start of the returned
events.
The events returned are in ascending order.
"""
rows, token = yield self.get_recent_event_ids_for_room(
room_id, limit, end_token
)
logger.debug("stream before")
events = yield self.get_events_as_list(
[r.event_id for r in rows], get_prev_content=True
)
logger.debug("stream after")
self._set_before_and_after(events, rows)
defer.returnValue((events, token))
@defer.inlineCallbacks
def get_recent_event_ids_for_room(self, room_id, limit, end_token):
"""Get the most recent events in the room in topological ordering.
Args:
room_id (str)
limit (int)
end_token (str): The stream token representing now.
Returns:
Deferred[tuple[list[_EventDictReturn], str]]: Returns a list of
_EventDictReturn and a token pointing to the start of the returned
events.
The events returned are in ascending order.
"""
# Allow a zero limit here, and no-op.
if limit == 0:
defer.returnValue(([], end_token))
end_token = RoomStreamToken.parse(end_token)
rows, token = yield self.runInteraction(
"get_recent_event_ids_for_room",
self._paginate_room_events_txn,
room_id,
from_token=end_token,
limit=limit,
)
# We want to return the results in ascending order.
rows.reverse()
defer.returnValue((rows, token))
def get_room_event_after_stream_ordering(self, room_id, stream_ordering):
"""Gets details of the first event in a room at or after a stream ordering
Args:
room_id (str):
stream_ordering (int):
Returns:
Deferred[(int, int, str)]:
(stream ordering, topological ordering, event_id)
"""
def _f(txn):
sql = (
"SELECT stream_ordering, topological_ordering, event_id"
" FROM events"
" WHERE room_id = ? AND stream_ordering >= ?"
" AND NOT outlier"
" ORDER BY stream_ordering"
" LIMIT 1"
)
txn.execute(sql, (room_id, stream_ordering))
return txn.fetchone()
return self.runInteraction("get_room_event_after_stream_ordering", _f)
@defer.inlineCallbacks
def get_room_events_max_id(self, room_id=None):
"""Returns the current token for rooms stream.
By default, it returns the current global stream token. Specifying a
`room_id` causes it to return the current room specific topological
token.
"""
token = yield self.get_room_max_stream_ordering()
if room_id is None:
defer.returnValue("s%d" % (token,))
else:
topo = yield self.runInteraction(
"_get_max_topological_txn", self._get_max_topological_txn, room_id
)
defer.returnValue("t%d-%d" % (topo, token))
def get_stream_token_for_event(self, event_id):
"""The stream token for an event
Args:
event_id(str): The id of the event to look up a stream token for.
Raises:
StoreError if the event wasn't in the database.
Returns:
A deferred "s%d" stream token.
"""
return self._simple_select_one_onecol(
table="events", keyvalues={"event_id": event_id}, retcol="stream_ordering"
).addCallback(lambda row: "s%d" % (row,))
def get_topological_token_for_event(self, event_id):
"""The stream token for an event
Args:
event_id(str): The id of the event to look up a stream token for.
Raises:
StoreError if the event wasn't in the database.
Returns:
A deferred "t%d-%d" topological token.
"""
return self._simple_select_one(
table="events",
keyvalues={"event_id": event_id},
retcols=("stream_ordering", "topological_ordering"),
desc="get_topological_token_for_event",
).addCallback(
lambda row: "t%d-%d" % (row["topological_ordering"], row["stream_ordering"])
)
def get_max_topological_token(self, room_id, stream_key):
"""Get the max topological token in a room before the given stream
ordering.
Args:
room_id (str)
stream_key (int)
Returns:
Deferred[int]
"""
sql = (
"SELECT coalesce(max(topological_ordering), 0) FROM events"
" WHERE room_id = ? AND stream_ordering < ?"
)
return self._execute(
"get_max_topological_token", None, sql, room_id, stream_key
).addCallback(lambda r: r[0][0] if r else 0)
def _get_max_topological_txn(self, txn, room_id):
txn.execute(
"SELECT MAX(topological_ordering) FROM events" " WHERE room_id = ?",
(room_id,),
)
rows = txn.fetchall()
return rows[0][0] if rows else 0
@staticmethod
def _set_before_and_after(events, rows, topo_order=True):
"""Inserts ordering information to events' internal metadata from
the DB rows.
Args:
events (list[FrozenEvent])
rows (list[_EventDictReturn])
topo_order (bool): Whether the events were ordered topologically
or by stream ordering. If true then all rows should have a non
null topological_ordering.
"""
for event, row in zip(events, rows):
stream = row.stream_ordering
if topo_order and row.topological_ordering:
topo = row.topological_ordering
else:
topo = None
internal = event.internal_metadata
internal.before = str(RoomStreamToken(topo, stream - 1))
internal.after = str(RoomStreamToken(topo, stream))
internal.order = (int(topo) if topo else 0, int(stream))
@defer.inlineCallbacks
def get_events_around(
self, room_id, event_id, before_limit, after_limit, event_filter=None
):
"""Retrieve events and pagination tokens around a given event in a
room.
Args:
room_id (str)
event_id (str)
before_limit (int)
after_limit (int)
event_filter (Filter|None)
Returns:
dict
"""
results = yield self.runInteraction(
"get_events_around",
self._get_events_around_txn,
room_id,
event_id,
before_limit,
after_limit,
event_filter,
)
events_before = yield self.get_events_as_list(
[e for e in results["before"]["event_ids"]], get_prev_content=True
)
events_after = yield self.get_events_as_list(
[e for e in results["after"]["event_ids"]], get_prev_content=True
)
defer.returnValue(
{
"events_before": events_before,
"events_after": events_after,
"start": results["before"]["token"],
"end": results["after"]["token"],
}
)
def _get_events_around_txn(
self, txn, room_id, event_id, before_limit, after_limit, event_filter
):
"""Retrieves event_ids and pagination tokens around a given event in a
room.
Args:
room_id (str)
event_id (str)
before_limit (int)
after_limit (int)
event_filter (Filter|None)
Returns:
dict
"""
results = self._simple_select_one_txn(
txn,
"events",
keyvalues={"event_id": event_id, "room_id": room_id},
retcols=["stream_ordering", "topological_ordering"],
)
# Paginating backwards includes the event at the token, but paginating
# forward doesn't.
before_token = RoomStreamToken(
results["topological_ordering"] - 1, results["stream_ordering"]
)
after_token = RoomStreamToken(
results["topological_ordering"], results["stream_ordering"]
)
rows, start_token = self._paginate_room_events_txn(
txn,
room_id,
before_token,
direction='b',
limit=before_limit,
event_filter=event_filter,
)
events_before = [r.event_id for r in rows]
rows, end_token = self._paginate_room_events_txn(
txn,
room_id,
after_token,
direction='f',
limit=after_limit,
event_filter=event_filter,
)
events_after = [r.event_id for r in rows]
return {
"before": {"event_ids": events_before, "token": start_token},
"after": {"event_ids": events_after, "token": end_token},
}
@defer.inlineCallbacks
def get_all_new_events_stream(self, from_id, current_id, limit):
"""Get all new events
Returns all events with from_id < stream_ordering <= current_id.
Args:
from_id (int): the stream_ordering of the last event we processed
current_id (int): the stream_ordering of the most recently processed event
limit (int): the maximum number of events to return
Returns:
Deferred[Tuple[int, list[FrozenEvent]]]: A tuple of (next_id, events), where
`next_id` is the next value to pass as `from_id` (it will either be the
stream_ordering of the last returned event, or, if fewer than `limit` events
were found, `current_id`.
"""
def get_all_new_events_stream_txn(txn):
sql = (
"SELECT e.stream_ordering, e.event_id"
" FROM events AS e"
" WHERE"
" ? < e.stream_ordering AND e.stream_ordering <= ?"
" ORDER BY e.stream_ordering ASC"
" LIMIT ?"
)
txn.execute(sql, (from_id, current_id, limit))
rows = txn.fetchall()
upper_bound = current_id
if len(rows) == limit:
upper_bound = rows[-1][0]
return upper_bound, [row[1] for row in rows]
upper_bound, event_ids = yield self.runInteraction(
"get_all_new_events_stream", get_all_new_events_stream_txn
)
events = yield self.get_events_as_list(event_ids)
defer.returnValue((upper_bound, events))
def get_federation_out_pos(self, typ):
return self._simple_select_one_onecol(
table="federation_stream_position",
retcol="stream_id",
keyvalues={"type": typ},
desc="get_federation_out_pos",
)
def update_federation_out_pos(self, typ, stream_id):
return self._simple_update_one(
table="federation_stream_position",
keyvalues={"type": typ},
updatevalues={"stream_id": stream_id},
desc="update_federation_out_pos",
)
def has_room_changed_since(self, room_id, stream_id):
return self._events_stream_cache.has_entity_changed(room_id, stream_id)
def _paginate_room_events_txn(
self,
txn,
room_id,
from_token,
to_token=None,
direction='b',
limit=-1,
event_filter=None,
):
"""Returns list of events before or after a given token.
Args:
txn
room_id (str)
from_token (RoomStreamToken): The token used to stream from
to_token (RoomStreamToken|None): A token which if given limits the
results to only those before
direction(char): Either 'b' or 'f' to indicate whether we are
paginating forwards or backwards from `from_key`.
limit (int): The maximum number of events to return.
event_filter (Filter|None): If provided filters the events to
those that match the filter.
Returns:
Deferred[tuple[list[_EventDictReturn], str]]: Returns the results
as a list of _EventDictReturn and a token that points to the end
of the result set.
"""
assert int(limit) >= 0
# Tokens really represent positions between elements, but we use
# the convention of pointing to the event before the gap. Hence
# we have a bit of asymmetry when it comes to equalities.
args = [False, room_id]
if direction == 'b':
order = "DESC"
else:
order = "ASC"
bounds = generate_pagination_where_clause(
direction=direction,
column_names=("topological_ordering", "stream_ordering"),
from_token=from_token,
to_token=to_token,
engine=self.database_engine,
)
filter_clause, filter_args = filter_to_clause(event_filter)
if filter_clause:
bounds += " AND " + filter_clause
args.extend(filter_args)
args.append(int(limit))
sql = (
"SELECT event_id, topological_ordering, stream_ordering"
" FROM events"
" WHERE outlier = ? AND room_id = ? AND %(bounds)s"
" ORDER BY topological_ordering %(order)s,"
" stream_ordering %(order)s LIMIT ?"
) % {"bounds": bounds, "order": order}
txn.execute(sql, args)
rows = [_EventDictReturn(row[0], row[1], row[2]) for row in txn]
if rows:
topo = rows[-1].topological_ordering
toke = rows[-1].stream_ordering
if direction == 'b':
# Tokens are positions between events.
# This token points *after* the last event in the chunk.
# We need it to point to the event before it in the chunk
# when we are going backwards so we subtract one from the
# stream part.
toke -= 1
next_token = RoomStreamToken(topo, toke)
else:
# TODO (erikj): We should work out what to do here instead.
next_token = to_token if to_token else from_token
return rows, str(next_token)
@defer.inlineCallbacks
def paginate_room_events(
self, room_id, from_key, to_key=None, direction='b', limit=-1, event_filter=None
):
"""Returns list of events before or after a given token.
Args:
room_id (str)
from_key (str): The token used to stream from
to_key (str|None): A token which if given limits the results to
only those before
direction(char): Either 'b' or 'f' to indicate whether we are
paginating forwards or backwards from `from_key`.
limit (int): The maximum number of events to return. Zero or less
means no limit.
event_filter (Filter|None): If provided filters the events to
those that match the filter.
Returns:
tuple[list[dict], str]: Returns the results as a list of dicts and
a token that points to the end of the result set. The dicts have
the keys "event_id", "topological_ordering" and "stream_orderign".
"""
from_key = RoomStreamToken.parse(from_key)
if to_key:
to_key = RoomStreamToken.parse(to_key)
rows, token = yield self.runInteraction(
"paginate_room_events",
self._paginate_room_events_txn,
room_id,
from_key,
to_key,
direction,
limit,
event_filter,
)
events = yield self.get_events_as_list(
[r.event_id for r in rows], get_prev_content=True
)
self._set_before_and_after(events, rows)
defer.returnValue((events, token))
class ReceiptsWorkerStore(SQLBaseStore):
"""This is an abstract base class where subclasses must implement
`get_max_receipt_stream_id` which can be called in the initializer.
"""
# This ABCMeta metaclass ensures that we cannot be instantiated without
# the abstract methods being implemented.
__metaclass__ = abc.ABCMeta
def __init__(self, db_conn, hs):
super(ReceiptsWorkerStore, self).__init__(db_conn, hs)
self._receipts_stream_cache = StreamChangeCache(
"ReceiptsRoomChangeCache", self.get_max_receipt_stream_id())
@abc.abstractmethod
def get_max_receipt_stream_id(self):
"""Get the current max stream ID for receipts stream
Returns:
int
"""
raise NotImplementedError()
@cachedInlineCallbacks()
def get_users_with_read_receipts_in_room(self, room_id):
receipts = yield self.get_receipts_for_room(room_id, "m.read")
defer.returnValue(set(r['user_id'] for r in receipts))
@cached(num_args=2)
def get_receipts_for_room(self, room_id, receipt_type):
return self._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",
)
@cached(num_args=3)
def get_last_receipt_event_id_for_user(self, user_id, room_id,
receipt_type):
return self._simple_select_one_onecol(
table="receipts_linearized",
keyvalues={
"room_id": room_id,
"receipt_type": receipt_type,
"user_id": user_id
},
retcol="event_id",
desc="get_own_receipt_for_user",
allow_none=True,
)
@cachedInlineCallbacks(num_args=2)
def get_receipts_for_user(self, user_id, receipt_type):
rows = yield self._simple_select_list(
table="receipts_linearized",
keyvalues={
"user_id": user_id,
"receipt_type": receipt_type,
},
retcols=("room_id", "event_id"),
desc="get_receipts_for_user",
)
defer.returnValue({row["room_id"]: row["event_id"] for row in rows})
@defer.inlineCallbacks
def get_receipts_for_user_with_orderings(self, user_id, receipt_type):
def f(txn):
sql = ("SELECT rl.room_id, rl.event_id,"
" e.topological_ordering, e.stream_ordering"
" FROM receipts_linearized AS rl"
" INNER JOIN events AS e USING (room_id, event_id)"
" WHERE rl.room_id = e.room_id"
" AND rl.event_id = e.event_id"
" AND user_id = ?")
txn.execute(sql, (user_id, ))
return txn.fetchall()
rows = yield self.runInteraction(
"get_receipts_for_user_with_orderings", f)
defer.returnValue({
row[0]: {
"event_id": row[1],
"topological_ordering": row[2],
"stream_ordering": row[3],
}
for row in rows
})
@defer.inlineCallbacks
def get_linearized_receipts_for_rooms(self,
room_ids,
to_key,
from_key=None):
"""Get receipts for multiple rooms for sending to clients.
Args:
room_ids (list): List of room_ids.
to_key (int): Max stream id to fetch receipts upto.
from_key (int): Min stream id to fetch receipts from. None fetches
from the start.
Returns:
list: A list of receipts.
"""
room_ids = set(room_ids)
if from_key:
room_ids = yield self._receipts_stream_cache.get_entities_changed(
room_ids, from_key)
results = yield self._get_linearized_receipts_for_rooms(
room_ids, to_key, from_key=from_key)
defer.returnValue([ev for res in results.values() for ev in res])
@cachedInlineCallbacks(num_args=3, tree=True)
def get_linearized_receipts_for_room(self, room_id, to_key, from_key=None):
"""Get receipts for a single room for sending to clients.
Args:
room_ids (str): The room id.
to_key (int): Max stream id to fetch receipts upto.
from_key (int): Min stream id to fetch receipts from. None fetches
from the start.
Returns:
list: A list of receipts.
"""
def f(txn):
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))
else:
sql = ("SELECT * FROM receipts_linearized WHERE"
" room_id = ? AND stream_id <= ?")
txn.execute(sql, (room_id, to_key))
rows = self.cursor_to_dict(txn)
return rows
rows = yield self.runInteraction("get_linearized_receipts_for_room", f)
if not rows:
defer.returnValue([])
content = {}
for row in rows:
content.setdefault(row["event_id"], {}).setdefault(
row["receipt_type"],
{})[row["user_id"]] = json.loads(row["data"])
defer.returnValue([{
"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,
inlineCallbacks=True)
def _get_linearized_receipts_for_rooms(self,
room_ids,
to_key,
from_key=None):
if not room_ids:
defer.returnValue({})
def f(txn):
if from_key:
sql = ("SELECT * FROM receipts_linearized WHERE"
" room_id IN (%s) AND stream_id > ? AND stream_id <= ?"
) % (",".join(["?"] * len(room_ids)))
args = list(room_ids)
args.extend([from_key, to_key])
txn.execute(sql, args)
else:
sql = ("SELECT * FROM receipts_linearized WHERE"
" room_id IN (%s) AND stream_id <= ?") % (",".join(
["?"] * len(room_ids)))
args = list(room_ids)
args.append(to_key)
txn.execute(sql, args)
return self.cursor_to_dict(txn)
txn_results = yield self.runInteraction(
"_get_linearized_receipts_for_rooms", f)
results = {}
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"]] = json.loads(row["data"])
results = {
room_id: [results[room_id]] if room_id in results else []
for room_id in room_ids
}
defer.returnValue(results)
def get_all_updated_receipts(self, last_id, current_id, limit=None):
if last_id == current_id:
return defer.succeed([])
def get_all_updated_receipts_txn(txn):
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")
args = [last_id, current_id]
if limit is not None:
sql += " LIMIT ?"
args.append(limit)
txn.execute(sql, args)
return txn.fetchall()
return self.runInteraction("get_all_updated_receipts",
get_all_updated_receipts_txn)
def _invalidate_get_users_with_receipts_in_room(self, room_id,
receipt_type, user_id):
if receipt_type != "m.read":
return
# Returns either an ObservableDeferred or the raw result
res = self.get_users_with_read_receipts_in_room.cache.get(
room_id,
None,
update_metrics=False,
)
# first handle the Deferred case
if isinstance(res, defer.Deferred):
if res.called:
res = res.result
else:
res = None
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
self.get_users_with_read_receipts_in_room.invalidate((room_id, ))
class ReceiptsStore(SQLBaseStore):
def __init__(self, hs):
super(ReceiptsStore, self).__init__(hs)
self._receipts_stream_cache = StreamChangeCache(
"ReceiptsRoomChangeCache", self._receipts_id_gen.get_current_token()
)
@cachedInlineCallbacks()
def get_users_with_read_receipts_in_room(self, room_id):
receipts = yield self.get_receipts_for_room(room_id, "m.read")
defer.returnValue(set(r['user_id'] for r in receipts))
def _invalidate_get_users_with_receipts_in_room(self, room_id, receipt_type,
user_id):
if receipt_type != "m.read":
return
# Returns an ObservableDeferred
res = self.get_users_with_read_receipts_in_room.cache.get((room_id,), None)
if res:
if isinstance(res, defer.Deferred) and res.called:
res = res.result
if user_id in res:
# We'd only be adding to the set, so no point invalidating if the
# user is already there
return
self.get_users_with_read_receipts_in_room.invalidate((room_id,))
@cached(num_args=2)
def get_receipts_for_room(self, room_id, receipt_type):
return self._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",
)
@cached(num_args=3)
def get_last_receipt_event_id_for_user(self, user_id, room_id, receipt_type):
return self._simple_select_one_onecol(
table="receipts_linearized",
keyvalues={
"room_id": room_id,
"receipt_type": receipt_type,
"user_id": user_id
},
retcol="event_id",
desc="get_own_receipt_for_user",
allow_none=True,
)
@cachedInlineCallbacks(num_args=2)
def get_receipts_for_user(self, user_id, receipt_type):
rows = yield self._simple_select_list(
table="receipts_linearized",
keyvalues={
"user_id": user_id,
"receipt_type": receipt_type,
},
retcols=("room_id", "event_id"),
desc="get_receipts_for_user",
)
defer.returnValue({row["room_id"]: row["event_id"] for row in rows})
@defer.inlineCallbacks
def get_receipts_for_user_with_orderings(self, user_id, receipt_type):
def f(txn):
sql = (
"SELECT rl.room_id, rl.event_id,"
" e.topological_ordering, e.stream_ordering"
" FROM receipts_linearized AS rl"
" INNER JOIN events AS e USING (room_id, event_id)"
" WHERE rl.room_id = e.room_id"
" AND rl.event_id = e.event_id"
" AND user_id = ?"
)
txn.execute(sql, (user_id,))
return txn.fetchall()
rows = yield self.runInteraction(
"get_receipts_for_user_with_orderings", f
)
defer.returnValue({
row[0]: {
"event_id": row[1],
"topological_ordering": row[2],
"stream_ordering": row[3],
} for row in rows
})
@defer.inlineCallbacks
def get_linearized_receipts_for_rooms(self, room_ids, to_key, from_key=None):
"""Get receipts for multiple rooms for sending to clients.
Args:
room_ids (list): List of room_ids.
to_key (int): Max stream id to fetch receipts upto.
from_key (int): Min stream id to fetch receipts from. None fetches
from the start.
Returns:
list: A list of receipts.
"""
room_ids = set(room_ids)
if from_key:
room_ids = yield self._receipts_stream_cache.get_entities_changed(
room_ids, from_key
)
results = yield self._get_linearized_receipts_for_rooms(
room_ids, to_key, from_key=from_key
)
defer.returnValue([ev for res in results.values() for ev in res])
@cachedInlineCallbacks(num_args=3, tree=True)
def get_linearized_receipts_for_room(self, room_id, to_key, from_key=None):
"""Get receipts for a single room for sending to clients.
Args:
room_ids (str): The room id.
to_key (int): Max stream id to fetch receipts upto.
from_key (int): Min stream id to fetch receipts from. None fetches
from the start.
Returns:
list: A list of receipts.
"""
def f(txn):
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)
)
else:
sql = (
"SELECT * FROM receipts_linearized WHERE"
" room_id = ? AND stream_id <= ?"
)
txn.execute(
sql,
(room_id, to_key)
)
rows = self.cursor_to_dict(txn)
return rows
rows = yield self.runInteraction(
"get_linearized_receipts_for_room", f
)
if not rows:
defer.returnValue([])
content = {}
for row in rows:
content.setdefault(
row["event_id"], {}
).setdefault(
row["receipt_type"], {}
)[row["user_id"]] = json.loads(row["data"])
defer.returnValue([{
"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, inlineCallbacks=True)
def _get_linearized_receipts_for_rooms(self, room_ids, to_key, from_key=None):
if not room_ids:
defer.returnValue({})
def f(txn):
if from_key:
sql = (
"SELECT * FROM receipts_linearized WHERE"
" room_id IN (%s) AND stream_id > ? AND stream_id <= ?"
) % (
",".join(["?"] * len(room_ids))
)
args = list(room_ids)
args.extend([from_key, to_key])
txn.execute(sql, args)
else:
sql = (
"SELECT * FROM receipts_linearized WHERE"
" room_id IN (%s) AND stream_id <= ?"
) % (
",".join(["?"] * len(room_ids))
)
args = list(room_ids)
args.append(to_key)
txn.execute(sql, args)
return self.cursor_to_dict(txn)
txn_results = yield self.runInteraction(
"_get_linearized_receipts_for_rooms", f
)
results = {}
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"]] = json.loads(row["data"])
results = {
room_id: [results[room_id]] if room_id in results else []
for room_id in room_ids
}
defer.returnValue(results)
def get_max_receipt_stream_id(self):
return self._receipts_id_gen.get_current_token()
def insert_linearized_receipt_txn(self, txn, room_id, receipt_type,
user_id, event_id, data, stream_id):
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.invalidate, (user_id, receipt_type)
)
# FIXME: This shouldn't invalidate the whole cache
txn.call_after(self.get_linearized_receipts_for_room.invalidate_many, (room_id,))
txn.call_after(
self._receipts_stream_cache.entity_has_changed,
room_id, stream_id
)
txn.call_after(
self.get_last_receipt_event_id_for_user.invalidate,
(user_id, room_id, receipt_type)
)
res = self._simple_select_one_txn(
txn,
table="events",
retcols=["topological_ordering", "stream_ordering"],
keyvalues={"event_id": event_id},
allow_none=True
)
topological_ordering = int(res["topological_ordering"]) if res else None
stream_ordering = int(res["stream_ordering"]) if res else None
# We don't want to clobber receipts for more recent events, so we
# have to compare orderings of existing receipts
sql = (
"SELECT topological_ordering, 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))
if topological_ordering:
for to, so, _ in txn:
if int(to) > topological_ordering:
return False
elif int(to) == topological_ordering and int(so) >= stream_ordering:
return False
self._simple_delete_txn(
txn,
table="receipts_linearized",
keyvalues={
"room_id": room_id,
"receipt_type": receipt_type,
"user_id": user_id,
}
)
self._simple_insert_txn(
txn,
table="receipts_linearized",
values={
"stream_id": stream_id,
"room_id": room_id,
"receipt_type": receipt_type,
"user_id": user_id,
"event_id": event_id,
"data": json.dumps(data),
}
)
if receipt_type == "m.read" and topological_ordering:
self._remove_old_push_actions_before_txn(
txn,
room_id=room_id,
user_id=user_id,
topological_ordering=topological_ordering,
stream_ordering=stream_ordering,
)
return True
@defer.inlineCallbacks
def insert_receipt(self, room_id, receipt_type, user_id, event_ids, data):
"""Insert a receipt, either from local client or remote server.
Automatically does conversion between linearized and graph
representations.
"""
if not event_ids:
return
if len(event_ids) == 1:
linearized_event_id = event_ids[0]
else:
# we need to points in graph -> linearized form.
# TODO: Make this better.
def graph_to_linear(txn):
query = (
"SELECT event_id WHERE room_id = ? AND stream_ordering IN ("
" SELECT max(stream_ordering) WHERE event_id IN (%s)"
")"
) % (",".join(["?"] * len(event_ids)))
txn.execute(query, [room_id] + event_ids)
rows = txn.fetchall()
if rows:
return rows[0][0]
else:
raise RuntimeError("Unrecognized event_ids: %r" % (event_ids,))
linearized_event_id = yield self.runInteraction(
"insert_receipt_conv", graph_to_linear
)
stream_id_manager = self._receipts_id_gen.get_next()
with stream_id_manager as stream_id:
have_persisted = yield self.runInteraction(
"insert_linearized_receipt",
self.insert_linearized_receipt_txn,
room_id, receipt_type, user_id, linearized_event_id,
data,
stream_id=stream_id,
)
if not have_persisted:
defer.returnValue(None)
yield self.insert_graph_receipt(
room_id, receipt_type, user_id, event_ids, data
)
max_persisted_id = self._receipts_id_gen.get_current_token()
defer.returnValue((stream_id, max_persisted_id))
def insert_graph_receipt(self, room_id, receipt_type, user_id, event_ids,
data):
return self.runInteraction(
"insert_graph_receipt",
self.insert_graph_receipt_txn,
room_id, receipt_type, user_id, event_ids, data
)
def insert_graph_receipt_txn(self, txn, room_id, receipt_type,
user_id, event_ids, data):
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.invalidate, (user_id, receipt_type)
)
# FIXME: This shouldn't invalidate the whole cache
txn.call_after(self.get_linearized_receipts_for_room.invalidate_many, (room_id,))
self._simple_delete_txn(
txn,
table="receipts_graph",
keyvalues={
"room_id": room_id,
"receipt_type": receipt_type,
"user_id": user_id,
}
)
self._simple_insert_txn(
txn,
table="receipts_graph",
values={
"room_id": room_id,
"receipt_type": receipt_type,
"user_id": user_id,
"event_ids": json.dumps(event_ids),
"data": json.dumps(data),
}
)
def get_all_updated_receipts(self, last_id, current_id, limit=None):
if last_id == current_id:
return defer.succeed([])
def get_all_updated_receipts_txn(txn):
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"
)
args = [last_id, current_id]
if limit is not None:
sql += " LIMIT ?"
args.append(limit)
txn.execute(sql, args)
return txn.fetchall()
return self.runInteraction(
"get_all_updated_receipts", get_all_updated_receipts_txn
)
class ReceiptsStore(SQLBaseStore):
def __init__(self, hs):
super(ReceiptsStore, self).__init__(hs)
self._receipts_stream_cache = StreamChangeCache(
"ReceiptsRoomChangeCache", self._receipts_id_gen.get_current_token()
)
@cachedInlineCallbacks()
def get_users_with_read_receipts_in_room(self, room_id):
receipts = yield self.get_receipts_for_room(room_id, "m.read")
defer.returnValue(set(r['user_id'] for r in receipts))
def _invalidate_get_users_with_receipts_in_room(self, room_id, receipt_type,
user_id):
if receipt_type != "m.read":
return
# Returns an ObservableDeferred
res = self.get_users_with_read_receipts_in_room.cache.get((room_id,), None)
if res and res.called and user_id in res.result:
# We'd only be adding to the set, so no point invalidating if the
# user is already there
return
self.get_users_with_read_receipts_in_room.invalidate((room_id,))
@cached(num_args=2)
def get_receipts_for_room(self, room_id, receipt_type):
return self._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",
)
@cached(num_args=3)
def get_last_receipt_event_id_for_user(self, user_id, room_id, receipt_type):
return self._simple_select_one_onecol(
table="receipts_linearized",
keyvalues={
"room_id": room_id,
"receipt_type": receipt_type,
"user_id": user_id
},
retcol="event_id",
desc="get_own_receipt_for_user",
allow_none=True,
)
@cachedInlineCallbacks(num_args=2)
def get_receipts_for_user(self, user_id, receipt_type):
rows = yield self._simple_select_list(
table="receipts_linearized",
keyvalues={
"user_id": user_id,
"receipt_type": receipt_type,
},
retcols=("room_id", "event_id"),
desc="get_receipts_for_user",
)
defer.returnValue({row["room_id"]: row["event_id"] for row in rows})
@defer.inlineCallbacks
def get_linearized_receipts_for_rooms(self, room_ids, to_key, from_key=None):
"""Get receipts for multiple rooms for sending to clients.
Args:
room_ids (list): List of room_ids.
to_key (int): Max stream id to fetch receipts upto.
from_key (int): Min stream id to fetch receipts from. None fetches
from the start.
Returns:
list: A list of receipts.
"""
room_ids = set(room_ids)
if from_key:
room_ids = yield self._receipts_stream_cache.get_entities_changed(
room_ids, from_key
)
results = yield self._get_linearized_receipts_for_rooms(
room_ids, to_key, from_key=from_key
)
defer.returnValue([ev for res in results.values() for ev in res])
@cachedInlineCallbacks(num_args=3, max_entries=5000, lru=True, tree=True)
def get_linearized_receipts_for_room(self, room_id, to_key, from_key=None):
"""Get receipts for a single room for sending to clients.
Args:
room_ids (str): The room id.
to_key (int): Max stream id to fetch receipts upto.
from_key (int): Min stream id to fetch receipts from. None fetches
from the start.
Returns:
list: A list of receipts.
"""
def f(txn):
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)
)
else:
sql = (
"SELECT * FROM receipts_linearized WHERE"
" room_id = ? AND stream_id <= ?"
)
txn.execute(
sql,
(room_id, to_key)
)
rows = self.cursor_to_dict(txn)
return rows
rows = yield self.runInteraction(
"get_linearized_receipts_for_room", f
)
if not rows:
defer.returnValue([])
content = {}
for row in rows:
content.setdefault(
row["event_id"], {}
).setdefault(
row["receipt_type"], {}
)[row["user_id"]] = json.loads(row["data"])
defer.returnValue([{
"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, inlineCallbacks=True)
def _get_linearized_receipts_for_rooms(self, room_ids, to_key, from_key=None):
if not room_ids:
defer.returnValue({})
def f(txn):
if from_key:
sql = (
"SELECT * FROM receipts_linearized WHERE"
" room_id IN (%s) AND stream_id > ? AND stream_id <= ?"
) % (
",".join(["?"] * len(room_ids))
)
args = list(room_ids)
args.extend([from_key, to_key])
txn.execute(sql, args)
else:
sql = (
"SELECT * FROM receipts_linearized WHERE"
" room_id IN (%s) AND stream_id <= ?"
) % (
",".join(["?"] * len(room_ids))
)
args = list(room_ids)
args.append(to_key)
txn.execute(sql, args)
return self.cursor_to_dict(txn)
txn_results = yield self.runInteraction(
"_get_linearized_receipts_for_rooms", f
)
results = {}
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"]] = json.loads(row["data"])
results = {
room_id: [results[room_id]] if room_id in results else []
for room_id in room_ids
}
defer.returnValue(results)
def get_max_receipt_stream_id(self):
return self._receipts_id_gen.get_current_token()
def insert_linearized_receipt_txn(self, txn, room_id, receipt_type,
user_id, event_id, data, stream_id):
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.invalidate, (user_id, receipt_type)
)
# FIXME: This shouldn't invalidate the whole cache
txn.call_after(self.get_linearized_receipts_for_room.invalidate_many, (room_id,))
txn.call_after(
self._receipts_stream_cache.entity_has_changed,
room_id, stream_id
)
txn.call_after(
self.get_last_receipt_event_id_for_user.invalidate,
(user_id, room_id, receipt_type)
)
res = self._simple_select_one_txn(
txn,
table="events",
retcols=["topological_ordering", "stream_ordering"],
keyvalues={"event_id": event_id},
allow_none=True
)
topological_ordering = int(res["topological_ordering"]) if res else None
stream_ordering = int(res["stream_ordering"]) if res else None
# We don't want to clobber receipts for more recent events, so we
# have to compare orderings of existing receipts
sql = (
"SELECT topological_ordering, 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))
results = txn.fetchall()
if results and topological_ordering:
for to, so, _ in results:
if int(to) > topological_ordering:
return False
elif int(to) == topological_ordering and int(so) >= stream_ordering:
return False
self._simple_delete_txn(
txn,
table="receipts_linearized",
keyvalues={
"room_id": room_id,
"receipt_type": receipt_type,
"user_id": user_id,
}
)
self._simple_insert_txn(
txn,
table="receipts_linearized",
values={
"stream_id": stream_id,
"room_id": room_id,
"receipt_type": receipt_type,
"user_id": user_id,
"event_id": event_id,
"data": json.dumps(data),
}
)
if receipt_type == "m.read" and topological_ordering:
self._remove_old_push_actions_before_txn(
txn,
room_id=room_id,
user_id=user_id,
topological_ordering=topological_ordering,
)
return True
@defer.inlineCallbacks
def insert_receipt(self, room_id, receipt_type, user_id, event_ids, data):
"""Insert a receipt, either from local client or remote server.
Automatically does conversion between linearized and graph
representations.
"""
if not event_ids:
return
if len(event_ids) == 1:
linearized_event_id = event_ids[0]
else:
# we need to points in graph -> linearized form.
# TODO: Make this better.
def graph_to_linear(txn):
query = (
"SELECT event_id WHERE room_id = ? AND stream_ordering IN ("
" SELECT max(stream_ordering) WHERE event_id IN (%s)"
")"
) % (",".join(["?"] * len(event_ids)))
txn.execute(query, [room_id] + event_ids)
rows = txn.fetchall()
if rows:
return rows[0][0]
else:
raise RuntimeError("Unrecognized event_ids: %r" % (event_ids,))
linearized_event_id = yield self.runInteraction(
"insert_receipt_conv", graph_to_linear
)
stream_id_manager = self._receipts_id_gen.get_next()
with stream_id_manager as stream_id:
have_persisted = yield self.runInteraction(
"insert_linearized_receipt",
self.insert_linearized_receipt_txn,
room_id, receipt_type, user_id, linearized_event_id,
data,
stream_id=stream_id,
)
if not have_persisted:
defer.returnValue(None)
yield self.insert_graph_receipt(
room_id, receipt_type, user_id, event_ids, data
)
max_persisted_id = self._stream_id_gen.get_current_token()
defer.returnValue((stream_id, max_persisted_id))
def insert_graph_receipt(self, room_id, receipt_type, user_id, event_ids,
data):
return self.runInteraction(
"insert_graph_receipt",
self.insert_graph_receipt_txn,
room_id, receipt_type, user_id, event_ids, data
)
def insert_graph_receipt_txn(self, txn, room_id, receipt_type,
user_id, event_ids, data):
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.invalidate, (user_id, receipt_type)
)
# FIXME: This shouldn't invalidate the whole cache
txn.call_after(self.get_linearized_receipts_for_room.invalidate_many, (room_id,))
self._simple_delete_txn(
txn,
table="receipts_graph",
keyvalues={
"room_id": room_id,
"receipt_type": receipt_type,
"user_id": user_id,
}
)
self._simple_insert_txn(
txn,
table="receipts_graph",
values={
"room_id": room_id,
"receipt_type": receipt_type,
"user_id": user_id,
"event_ids": json.dumps(event_ids),
"data": json.dumps(data),
}
)
def get_all_updated_receipts(self, last_id, current_id, limit=None):
if last_id == current_id:
return defer.succeed([])
def get_all_updated_receipts_txn(txn):
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"
)
args = [last_id, current_id]
if limit is not None:
sql += " LIMIT ?"
args.append(limit)
txn.execute(sql, args)
return txn.fetchall()
return self.runInteraction(
"get_all_updated_receipts", get_all_updated_receipts_txn
)
class StreamWorkerStore(EventsWorkerStore, SQLBaseStore):
"""This is an abstract base class where subclasses must implement
`get_room_max_stream_ordering` and `get_room_min_stream_ordering`
which can be called in the initializer.
"""
__metaclass__ = abc.ABCMeta
def __init__(self, database: DatabasePool, db_conn, hs):
super(StreamWorkerStore, self).__init__(database, db_conn, hs)
self._instance_name = hs.get_instance_name()
self._send_federation = hs.should_send_federation()
self._federation_shard_config = hs.config.worker.federation_shard_config
# If we're a process that sends federation we may need to reset the
# `federation_stream_position` table to match the current sharding
# config. We don't do this now as otherwise two processes could conflict
# during startup which would cause one to die.
self._need_to_reset_federation_stream_positions = self._send_federation
events_max = self.get_room_max_stream_ordering()
event_cache_prefill, min_event_val = self.db_pool.get_cache_dict(
db_conn,
"events",
entity_column="room_id",
stream_column="stream_ordering",
max_value=events_max,
)
self._events_stream_cache = StreamChangeCache(
"EventsRoomStreamChangeCache",
min_event_val,
prefilled_cache=event_cache_prefill,
)
self._membership_stream_cache = StreamChangeCache(
"MembershipStreamChangeCache", events_max
)
self._stream_order_on_start = self.get_room_max_stream_ordering()
@abc.abstractmethod
def get_room_max_stream_ordering(self):
raise NotImplementedError()
@abc.abstractmethod
def get_room_min_stream_ordering(self):
raise NotImplementedError()
async def get_room_events_stream_for_rooms(
self,
room_ids: Iterable[str],
from_key: str,
to_key: str,
limit: int = 0,
order: str = "DESC",
) -> Dict[str, Tuple[List[EventBase], str]]:
"""Get new room events in stream ordering since `from_key`.
Args:
room_ids
from_key: Token from which no events are returned before
to_key: Token from which no events are returned after. (This
is typically the current stream token)
limit: Maximum number of events to return
order: Either "DESC" or "ASC". Determines which events are
returned when the result is limited. If "DESC" then the most
recent `limit` events are returned, otherwise returns the
oldest `limit` events.
Returns:
A map from room id to a tuple containing:
- list of recent events in the room
- stream ordering key for the start of the chunk of events returned.
"""
from_id = RoomStreamToken.parse_stream_token(from_key).stream
room_ids = self._events_stream_cache.get_entities_changed(room_ids, from_id)
if not room_ids:
return {}
results = {}
room_ids = list(room_ids)
for rm_ids in (room_ids[i : i + 20] for i in range(0, len(room_ids), 20)):
res = await make_deferred_yieldable(
defer.gatherResults(
[
run_in_background(
self.get_room_events_stream_for_room,
room_id,
from_key,
to_key,
limit,
order=order,
)
for room_id in rm_ids
],
consumeErrors=True,
)
)
results.update(dict(zip(rm_ids, res)))
return results
def get_rooms_that_changed(self, room_ids, from_key):
"""Given a list of rooms and a token, return rooms where there may have
been changes.
Args:
room_ids (list)
from_key (str): The room_key portion of a StreamToken
"""
from_key = RoomStreamToken.parse_stream_token(from_key).stream
return {
room_id
for room_id in room_ids
if self._events_stream_cache.has_entity_changed(room_id, from_key)
}
async def get_room_events_stream_for_room(
self,
room_id: str,
from_key: str,
to_key: str,
limit: int = 0,
order: str = "DESC",
) -> Tuple[List[EventBase], str]:
"""Get new room events in stream ordering since `from_key`.
Args:
room_id
from_key: Token from which no events are returned before
to_key: Token from which no events are returned after. (This
is typically the current stream token)
limit: Maximum number of events to return
order: Either "DESC" or "ASC". Determines which events are
returned when the result is limited. If "DESC" then the most
recent `limit` events are returned, otherwise returns the
oldest `limit` events.
Returns:
The list of events (in ascending order) and the token from the start
of the chunk of events returned.
"""
if from_key == to_key:
return [], from_key
from_id = RoomStreamToken.parse_stream_token(from_key).stream
to_id = RoomStreamToken.parse_stream_token(to_key).stream
has_changed = self._events_stream_cache.has_entity_changed(room_id, from_id)
if not has_changed:
return [], from_key
def f(txn):
sql = (
"SELECT event_id, stream_ordering FROM events WHERE"
" room_id = ?"
" AND not outlier"
" AND stream_ordering > ? AND stream_ordering <= ?"
" ORDER BY stream_ordering %s LIMIT ?"
) % (order,)
txn.execute(sql, (room_id, from_id, to_id, limit))
rows = [_EventDictReturn(row[0], None, row[1]) for row in txn]
return rows
rows = await self.db_pool.runInteraction("get_room_events_stream_for_room", f)
ret = await self.get_events_as_list(
[r.event_id for r in rows], get_prev_content=True
)
self._set_before_and_after(ret, rows, topo_order=from_id is None)
if order.lower() == "desc":
ret.reverse()
if rows:
key = "s%d" % min(r.stream_ordering for r in rows)
else:
# Assume we didn't get anything because there was nothing to
# get.
key = from_key
return ret, key
async def get_membership_changes_for_user(self, user_id, from_key, to_key):
from_id = RoomStreamToken.parse_stream_token(from_key).stream
to_id = RoomStreamToken.parse_stream_token(to_key).stream
if from_key == to_key:
return []
if from_id:
has_changed = self._membership_stream_cache.has_entity_changed(
user_id, int(from_id)
)
if not has_changed:
return []
def f(txn):
sql = (
"SELECT m.event_id, stream_ordering FROM events AS e,"
" room_memberships AS m"
" WHERE e.event_id = m.event_id"
" AND m.user_id = ?"
" AND e.stream_ordering > ? AND e.stream_ordering <= ?"
" ORDER BY e.stream_ordering ASC"
)
txn.execute(sql, (user_id, from_id, to_id))
rows = [_EventDictReturn(row[0], None, row[1]) for row in txn]
return rows
rows = await self.db_pool.runInteraction("get_membership_changes_for_user", f)
ret = await self.get_events_as_list(
[r.event_id for r in rows], get_prev_content=True
)
self._set_before_and_after(ret, rows, topo_order=False)
return ret
async def get_recent_events_for_room(
self, room_id: str, limit: int, end_token: str
) -> Tuple[List[EventBase], str]:
"""Get the most recent events in the room in topological ordering.
Args:
room_id
limit
end_token: The stream token representing now.
Returns:
A list of events and a token pointing to the start of the returned
events. The events returned are in ascending order.
"""
rows, token = await self.get_recent_event_ids_for_room(
room_id, limit, end_token
)
events = await self.get_events_as_list(
[r.event_id for r in rows], get_prev_content=True
)
self._set_before_and_after(events, rows)
return (events, token)
async def get_recent_event_ids_for_room(
self, room_id: str, limit: int, end_token: str
) -> Tuple[List[_EventDictReturn], str]:
"""Get the most recent events in the room in topological ordering.
Args:
room_id
limit
end_token: The stream token representing now.
Returns:
A list of _EventDictReturn and a token pointing to the start of the
returned events. The events returned are in ascending order.
"""
# Allow a zero limit here, and no-op.
if limit == 0:
return [], end_token
end_token = RoomStreamToken.parse(end_token)
rows, token = await self.db_pool.runInteraction(
"get_recent_event_ids_for_room",
self._paginate_room_events_txn,
room_id,
from_token=end_token,
limit=limit,
)
# We want to return the results in ascending order.
rows.reverse()
return rows, token
def get_room_event_before_stream_ordering(self, room_id: str, stream_ordering: int):
"""Gets details of the first event in a room at or before a stream ordering
Args:
room_id:
stream_ordering:
Returns:
Deferred[(int, int, str)]:
(stream ordering, topological ordering, event_id)
"""
def _f(txn):
sql = (
"SELECT stream_ordering, topological_ordering, event_id"
" FROM events"
" WHERE room_id = ? AND stream_ordering <= ?"
" AND NOT outlier"
" ORDER BY stream_ordering DESC"
" LIMIT 1"
)
txn.execute(sql, (room_id, stream_ordering))
return txn.fetchone()
return self.db_pool.runInteraction("get_room_event_before_stream_ordering", _f)
async def get_room_events_max_id(self, room_id: Optional[str] = None) -> str:
"""Returns the current token for rooms stream.
By default, it returns the current global stream token. Specifying a
`room_id` causes it to return the current room specific topological
token.
"""
token = self.get_room_max_stream_ordering()
if room_id is None:
return "s%d" % (token,)
else:
topo = await self.db_pool.runInteraction(
"_get_max_topological_txn", self._get_max_topological_txn, room_id
)
return "t%d-%d" % (topo, token)
async def get_stream_token_for_event(self, event_id: str) -> str:
"""The stream token for an event
Args:
event_id: The id of the event to look up a stream token for.
Raises:
StoreError if the event wasn't in the database.
Returns:
A "s%d" stream token.
"""
row = await self.db_pool.simple_select_one_onecol(
table="events", keyvalues={"event_id": event_id}, retcol="stream_ordering"
)
return "s%d" % (row,)
async def get_topological_token_for_event(self, event_id: str) -> str:
"""The stream token for an event
Args:
event_id: The id of the event to look up a stream token for.
Raises:
StoreError if the event wasn't in the database.
Returns:
A "t%d-%d" topological token.
"""
row = await self.db_pool.simple_select_one(
table="events",
keyvalues={"event_id": event_id},
retcols=("stream_ordering", "topological_ordering"),
desc="get_topological_token_for_event",
)
return "t%d-%d" % (row["topological_ordering"], row["stream_ordering"])
async def get_max_topological_token(self, room_id: str, stream_key: int) -> int:
"""Get the max topological token in a room before the given stream
ordering.
Args:
room_id
stream_key
Returns:
The maximum topological token.
"""
sql = (
"SELECT coalesce(max(topological_ordering), 0) FROM events"
" WHERE room_id = ? AND stream_ordering < ?"
)
row = await self.db_pool.execute(
"get_max_topological_token", None, sql, room_id, stream_key
)
return row[0][0] if row else 0
def _get_max_topological_txn(self, txn, room_id):
txn.execute(
"SELECT MAX(topological_ordering) FROM events WHERE room_id = ?",
(room_id,),
)
rows = txn.fetchall()
return rows[0][0] if rows else 0
@staticmethod
def _set_before_and_after(
events: List[EventBase], rows: List[_EventDictReturn], topo_order: bool = True
):
"""Inserts ordering information to events' internal metadata from
the DB rows.
Args:
events
rows
topo_order: Whether the events were ordered topologically or by stream
ordering. If true then all rows should have a non null
topological_ordering.
"""
for event, row in zip(events, rows):
stream = row.stream_ordering
if topo_order and row.topological_ordering:
topo = row.topological_ordering
else:
topo = None
internal = event.internal_metadata
internal.before = str(RoomStreamToken(topo, stream - 1))
internal.after = str(RoomStreamToken(topo, stream))
internal.order = (int(topo) if topo else 0, int(stream))
async def get_events_around(
self,
room_id: str,
event_id: str,
before_limit: int,
after_limit: int,
event_filter: Optional[Filter] = None,
) -> dict:
"""Retrieve events and pagination tokens around a given event in a
room.
"""
results = await self.db_pool.runInteraction(
"get_events_around",
self._get_events_around_txn,
room_id,
event_id,
before_limit,
after_limit,
event_filter,
)
events_before = await self.get_events_as_list(
list(results["before"]["event_ids"]), get_prev_content=True
)
events_after = await self.get_events_as_list(
list(results["after"]["event_ids"]), get_prev_content=True
)
return {
"events_before": events_before,
"events_after": events_after,
"start": results["before"]["token"],
"end": results["after"]["token"],
}
def _get_events_around_txn(
self,
txn,
room_id: str,
event_id: str,
before_limit: int,
after_limit: int,
event_filter: Optional[Filter],
) -> dict:
"""Retrieves event_ids and pagination tokens around a given event in a
room.
Args:
room_id
event_id
before_limit
after_limit
event_filter
Returns:
dict
"""
results = self.db_pool.simple_select_one_txn(
txn,
"events",
keyvalues={"event_id": event_id, "room_id": room_id},
retcols=["stream_ordering", "topological_ordering"],
)
# Paginating backwards includes the event at the token, but paginating
# forward doesn't.
before_token = RoomStreamToken(
results["topological_ordering"] - 1, results["stream_ordering"]
)
after_token = RoomStreamToken(
results["topological_ordering"], results["stream_ordering"]
)
rows, start_token = self._paginate_room_events_txn(
txn,
room_id,
before_token,
direction="b",
limit=before_limit,
event_filter=event_filter,
)
events_before = [r.event_id for r in rows]
rows, end_token = self._paginate_room_events_txn(
txn,
room_id,
after_token,
direction="f",
limit=after_limit,
event_filter=event_filter,
)
events_after = [r.event_id for r in rows]
return {
"before": {"event_ids": events_before, "token": start_token},
"after": {"event_ids": events_after, "token": end_token},
}
async def get_all_new_events_stream(
self, from_id: int, current_id: int, limit: int
) -> Tuple[int, List[EventBase]]:
"""Get all new events
Returns all events with from_id < stream_ordering <= current_id.
Args:
from_id: the stream_ordering of the last event we processed
current_id: the stream_ordering of the most recently processed event
limit: the maximum number of events to return
Returns:
A tuple of (next_id, events), where `next_id` is the next value to
pass as `from_id` (it will either be the stream_ordering of the
last returned event, or, if fewer than `limit` events were found,
the `current_id`).
"""
def get_all_new_events_stream_txn(txn):
sql = (
"SELECT e.stream_ordering, e.event_id"
" FROM events AS e"
" WHERE"
" ? < e.stream_ordering AND e.stream_ordering <= ?"
" ORDER BY e.stream_ordering ASC"
" LIMIT ?"
)
txn.execute(sql, (from_id, current_id, limit))
rows = txn.fetchall()
upper_bound = current_id
if len(rows) == limit:
upper_bound = rows[-1][0]
return upper_bound, [row[1] for row in rows]
upper_bound, event_ids = await self.db_pool.runInteraction(
"get_all_new_events_stream", get_all_new_events_stream_txn
)
events = await self.get_events_as_list(event_ids)
return upper_bound, events
async def get_federation_out_pos(self, typ: str) -> int:
if self._need_to_reset_federation_stream_positions:
await self.db_pool.runInteraction(
"_reset_federation_positions_txn", self._reset_federation_positions_txn
)
self._need_to_reset_federation_stream_positions = False
return await self.db_pool.simple_select_one_onecol(
table="federation_stream_position",
retcol="stream_id",
keyvalues={"type": typ, "instance_name": self._instance_name},
desc="get_federation_out_pos",
)
async def update_federation_out_pos(self, typ: str, stream_id: int) -> None:
if self._need_to_reset_federation_stream_positions:
await self.db_pool.runInteraction(
"_reset_federation_positions_txn", self._reset_federation_positions_txn
)
self._need_to_reset_federation_stream_positions = False
await self.db_pool.simple_update_one(
table="federation_stream_position",
keyvalues={"type": typ, "instance_name": self._instance_name},
updatevalues={"stream_id": stream_id},
desc="update_federation_out_pos",
)
def _reset_federation_positions_txn(self, txn) -> None:
"""Fiddles with the `federation_stream_position` table to make it match
the configured federation sender instances during start up.
"""
# The federation sender instances may have changed, so we need to
# massage the `federation_stream_position` table to have a row per type
# per instance sending federation. If there is a mismatch we update the
# table with the correct rows using the *minimum* stream ID seen. This
# may result in resending of events/EDUs to remote servers, but that is
# preferable to dropping them.
if not self._send_federation:
return
# Pull out the configured instances. If we don't have a shard config then
# we assume that we're the only instance sending.
configured_instances = self._federation_shard_config.instances
if not configured_instances:
configured_instances = [self._instance_name]
elif self._instance_name not in configured_instances:
return
instances_in_table = self.db_pool.simple_select_onecol_txn(
txn,
table="federation_stream_position",
keyvalues={},
retcol="instance_name",
)
if set(instances_in_table) == set(configured_instances):
# Nothing to do
return
sql = """
SELECT type, MIN(stream_id) FROM federation_stream_position
GROUP BY type
"""
txn.execute(sql)
min_positions = dict(txn) # Map from type -> min position
# Ensure we do actually have some values here
assert set(min_positions) == {"federation", "events"}
sql = """
DELETE FROM federation_stream_position
WHERE NOT (%s)
"""
clause, args = make_in_list_sql_clause(
txn.database_engine, "instance_name", configured_instances
)
txn.execute(sql % (clause,), args)
for typ, stream_id in min_positions.items():
self.db_pool.simple_upsert_txn(
txn,
table="federation_stream_position",
keyvalues={"type": typ, "instance_name": self._instance_name},
values={"stream_id": stream_id},
)
def has_room_changed_since(self, room_id: str, stream_id: int) -> bool:
return self._events_stream_cache.has_entity_changed(room_id, stream_id)
def _paginate_room_events_txn(
self,
txn,
room_id: str,
from_token: RoomStreamToken,
to_token: Optional[RoomStreamToken] = None,
direction: str = "b",
limit: int = -1,
event_filter: Optional[Filter] = None,
) -> Tuple[List[_EventDictReturn], str]:
"""Returns list of events before or after a given token.
Args:
txn
room_id
from_token: The token used to stream from
to_token: A token which if given limits the results to only those before
direction: Either 'b' or 'f' to indicate whether we are paginating
forwards or backwards from `from_key`.
limit: The maximum number of events to return.
event_filter: If provided filters the events to
those that match the filter.
Returns:
A list of _EventDictReturn and a token that points to the end of the
result set. If no events are returned then the end of the stream has
been reached (i.e. there are no events between `from_token` and
`to_token`), or `limit` is zero.
"""
assert int(limit) >= 0
# Tokens really represent positions between elements, but we use
# the convention of pointing to the event before the gap. Hence
# we have a bit of asymmetry when it comes to equalities.
args = [False, room_id]
if direction == "b":
order = "DESC"
else:
order = "ASC"
bounds = generate_pagination_where_clause(
direction=direction,
column_names=("topological_ordering", "stream_ordering"),
from_token=from_token,
to_token=to_token,
engine=self.database_engine,
)
filter_clause, filter_args = filter_to_clause(event_filter)
if filter_clause:
bounds += " AND " + filter_clause
args.extend(filter_args)
args.append(int(limit))
select_keywords = "SELECT"
join_clause = ""
if event_filter and event_filter.labels:
# If we're not filtering on a label, then joining on event_labels will
# return as many row for a single event as the number of labels it has. To
# avoid this, only join if we're filtering on at least one label.
join_clause = """
LEFT JOIN event_labels
USING (event_id, room_id, topological_ordering)
"""
if len(event_filter.labels) > 1:
# Using DISTINCT in this SELECT query is quite expensive, because it
# requires the engine to sort on the entire (not limited) result set,
# i.e. the entire events table. We only need to use it when we're
# filtering on more than two labels, because that's the only scenario
# in which we can possibly to get multiple times the same event ID in
# the results.
select_keywords += "DISTINCT"
sql = """
%(select_keywords)s event_id, topological_ordering, stream_ordering
FROM events
%(join_clause)s
WHERE outlier = ? AND room_id = ? AND %(bounds)s
ORDER BY topological_ordering %(order)s,
stream_ordering %(order)s LIMIT ?
""" % {
"select_keywords": select_keywords,
"join_clause": join_clause,
"bounds": bounds,
"order": order,
}
txn.execute(sql, args)
rows = [_EventDictReturn(row[0], row[1], row[2]) for row in txn]
if rows:
topo = rows[-1].topological_ordering
toke = rows[-1].stream_ordering
if direction == "b":
# Tokens are positions between events.
# This token points *after* the last event in the chunk.
# We need it to point to the event before it in the chunk
# when we are going backwards so we subtract one from the
# stream part.
toke -= 1
next_token = RoomStreamToken(topo, toke)
else:
# TODO (erikj): We should work out what to do here instead.
next_token = to_token if to_token else from_token
return rows, str(next_token)
async def paginate_room_events(
self,
room_id: str,
from_key: str,
to_key: Optional[str] = None,
direction: str = "b",
limit: int = -1,
event_filter: Optional[Filter] = None,
) -> Tuple[List[EventBase], str]:
"""Returns list of events before or after a given token.
Args:
room_id
from_key: The token used to stream from
to_key: A token which if given limits the results to only those before
direction: Either 'b' or 'f' to indicate whether we are paginating
forwards or backwards from `from_key`.
limit: The maximum number of events to return.
event_filter: If provided filters the events to those that match the filter.
Returns:
The results as a list of events and a token that points to the end
of the result set. If no events are returned then the end of the
stream has been reached (i.e. there are no events between `from_key`
and `to_key`).
"""
from_key = RoomStreamToken.parse(from_key)
if to_key:
to_key = RoomStreamToken.parse(to_key)
rows, token = await self.db_pool.runInteraction(
"paginate_room_events",
self._paginate_room_events_txn,
room_id,
from_key,
to_key,
direction,
limit,
event_filter,
)
events = await self.get_events_as_list(
[r.event_id for r in rows], get_prev_content=True
)
self._set_before_and_after(events, rows)
return (events, token)
class ReceiptsWorkerStore(SQLBaseStore):
"""This is an abstract base class where subclasses must implement
`get_max_receipt_stream_id` which can be called in the initializer.
"""
# This ABCMeta metaclass ensures that we cannot be instantiated without
# the abstract methods being implemented.
__metaclass__ = abc.ABCMeta
def __init__(self, database: DatabasePool, db_conn, hs):
super(ReceiptsWorkerStore, self).__init__(database, db_conn, hs)
self._receipts_stream_cache = StreamChangeCache(
"ReceiptsRoomChangeCache", self.get_max_receipt_stream_id())
@abc.abstractmethod
def get_max_receipt_stream_id(self):
"""Get the current max stream ID for receipts stream
Returns:
int
"""
raise NotImplementedError()
@cached()
async def get_users_with_read_receipts_in_room(self, room_id):
receipts = await self.get_receipts_for_room(room_id, "m.read")
return {r["user_id"] for r in receipts}
@cached(num_args=2)
async def get_receipts_for_room(self, room_id: str,
receipt_type: str) -> List[Dict[str, Any]]:
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",
)
@cached(num_args=3)
async def get_last_receipt_event_id_for_user(
self, user_id: str, room_id: str,
receipt_type: str) -> Optional[str]:
return await self.db_pool.simple_select_one_onecol(
table="receipts_linearized",
keyvalues={
"room_id": room_id,
"receipt_type": receipt_type,
"user_id": user_id,
},
retcol="event_id",
desc="get_own_receipt_for_user",
allow_none=True,
)
@cached(num_args=2)
async def get_receipts_for_user(self, user_id, receipt_type):
rows = await self.db_pool.simple_select_list(
table="receipts_linearized",
keyvalues={
"user_id": user_id,
"receipt_type": receipt_type
},
retcols=("room_id", "event_id"),
desc="get_receipts_for_user",
)
return {row["room_id"]: row["event_id"] for row in rows}
async def get_receipts_for_user_with_orderings(self, user_id,
receipt_type):
def f(txn):
sql = ("SELECT rl.room_id, rl.event_id,"
" e.topological_ordering, e.stream_ordering"
" FROM receipts_linearized AS rl"
" INNER JOIN events AS e USING (room_id, event_id)"
" WHERE rl.room_id = e.room_id"
" AND rl.event_id = e.event_id"
" AND user_id = ?")
txn.execute(sql, (user_id, ))
return 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
}
async def get_linearized_receipts_for_rooms(
self,
room_ids: List[str],
to_key: int,
from_key: Optional[int] = None) -> List[dict]:
"""Get receipts for multiple rooms for sending to clients.
Args:
room_id: List of room_ids.
to_key: Max stream id to fetch receipts upto.
from_key: Min stream id to fetch receipts from. None fetches
from the start.
Returns:
A list of receipts.
"""
room_ids = set(room_ids)
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]:
"""Get receipts for a single room for sending to clients.
Args:
room_ids: The room id.
to_key: Max stream id to fetch receipts upto.
from_key: Min stream id to fetch receipts from. None fetches
from the start.
Returns:
A list of receipts.
"""
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(num_args=3, tree=True)
async def _get_linearized_receipts_for_room(
self,
room_id: str,
to_key: int,
from_key: Optional[int] = None) -> List[dict]:
"""See get_linearized_receipts_for_room
"""
def f(txn):
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))
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 = {}
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,
to_key,
from_key=None):
if not room_ids:
return {}
def f(txn):
if from_key:
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)
txn.execute(sql + clause, [from_key, to_key] + list(args))
else:
sql = """
SELECT * FROM receipts_linearized WHERE
stream_id <= ? AND
"""
clause, args = make_in_list_sql_clause(self.database_engine,
"room_id", room_ids)
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 = {}
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"])
results = {
room_id: [results[room_id]] if room_id in results else []
for room_id in room_ids
}
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.
"""
if last_id == current_id:
return defer.succeed([])
def _get_users_sent_receipts_between_txn(txn):
sql = """
SELECT DISTINCT user_id FROM receipts_linearized
WHERE ? < stream_id AND stream_id <= ?
"""
txn.execute(sql, (last_id, current_id))
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):
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 = [(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("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):
if receipt_type != "m.read":
return
# Returns either an ObservableDeferred or the raw result
res = self.get_users_with_read_receipts_in_room.cache.get(
room_id, None, update_metrics=False)
# first handle the ObservableDeferred case
if isinstance(res, ObservableDeferred):
if res.has_called():
res = res.get_result()
else:
res = None
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
self.get_users_with_read_receipts_in_room.invalidate((room_id, ))
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,
)
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()
async def get_last_receipt_event_id_for_user(
self, user_id: str, room_id: str, receipt_types: Collection[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.
Returns:
The latest receipt, if one exists.
"""
result = await self.db_pool.runInteraction(
"get_last_receipt_event_id_for_user",
self.get_last_receipt_for_user_txn,
user_id,
room_id,
receipt_types,
)
if not result:
return None
event_id, _ = result
return event_id
def get_last_receipt_for_user_txn(
self,
txn: LoggingTransaction,
user_id: str,
room_id: str,
receipt_types: Collection[str],
) -> Optional[Tuple[str, int]]:
"""
Fetch the event ID and stream_ordering 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.
Returns:
The latest receipt, if one exists.
"""
clause, args = make_in_list_sql_clause(
self.database_engine, "receipt_type", receipt_types
)
sql = f"""
SELECT event_id, stream_ordering
FROM receipts_linearized
INNER JOIN events USING (room_id, event_id)
WHERE {clause}
AND user_id = ?
AND room_id = ?
ORDER BY stream_ordering DESC
LIMIT 1
"""
args.extend((user_id, room_id))
txn.execute(sql, args)
return cast(Optional[Tuple[str, int]], txn.fetchone())
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
)
# 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]]:
sql = (
"SELECT rl.room_id, rl.event_id,"
" e.topological_ordering, e.stream_ordering"
" FROM receipts_linearized AS rl"
" INNER JOIN events AS e USING (room_id, event_id)"
" WHERE rl.room_id = e.room_id"
" AND rl.event_id = e.event_id"
" AND user_id = ?"
" AND receipt_type = ?"
)
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
}
async def get_linearized_receipts_for_rooms(
self, room_ids: Iterable[str], to_key: int, from_key: Optional[int] = None
) -> List[dict]:
"""Get receipts for multiple rooms for sending to clients.
Args:
room_id: The room IDs to fetch receipts of.
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 list of receipts.
"""
room_ids = set(room_ids)
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]:
"""Get receipts for a single room for sending to clients.
Args:
room_ids: The room id.
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 list of receipts.
"""
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]]:
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))
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": EduTypes.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:
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
)
txn.execute(sql + clause, [from_key, to_key] + list(args))
else:
sql = """
SELECT * FROM receipts_linearized WHERE
stream_id <= ? AND
"""
clause, args = make_in_list_sql_clause(
self.database_engine, "room_id", room_ids
)
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:
# 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": EduTypes.RECEIPT, "room_id": row["room_id"], "content": {}},
)
# The content is of the form:
# {"$foo:bar": { "read": { "@user:host": <receipt> }, .. }, .. }
event_entry = room_event["content"].setdefault(row["event_id"], {})
receipt_type = event_entry.setdefault(row["receipt_type"], {})
receipt_type[row["user_id"]] = db_to_json(row["data"])
results = {
room_id: [results[room_id]] if room_id in results else []
for room_id in room_ids
}
return results
@cached(
num_args=2,
)
async def get_linearized_receipts_for_all_rooms(
self, to_key: int, from_key: Optional[int] = None
) -> Dict[str, JsonDict]:
"""Get receipts for all rooms between two stream_ids, up
to a limit of the latest 100 read receipts.
Args:
to_key: Max stream id to fetch receipts up to.
from_key: Min stream id to fetch receipts from. None fetches
from the start.
Returns:
A dictionary of roomids to a list of receipts.
"""
def f(txn: LoggingTransaction) -> List[Dict[str, Any]]:
if from_key:
sql = """
SELECT * FROM receipts_linearized WHERE
stream_id > ? AND stream_id <= ?
ORDER BY stream_id DESC
LIMIT 100
"""
txn.execute(sql, [from_key, to_key])
else:
sql = """
SELECT * FROM receipts_linearized WHERE
stream_id <= ?
ORDER BY stream_id DESC
LIMIT 100
"""
txn.execute(sql, [to_key])
return self.db_pool.cursor_to_dict(txn)
txn_results = await self.db_pool.runInteraction(
"get_linearized_receipts_for_all_rooms", f
)
results: JsonDict = {}
for row in txn_results:
# We want a single event per room, since we want to batch the
# receipts by room, event and type.
room_event = results.setdefault(
row["room_id"],
{"type": EduTypes.RECEIPT, "room_id": row["room_id"], "content": {}},
)
# The content is of the form:
# {"$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.
"""
if last_id == current_id:
return []
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))
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(
"get_all_updated_receipts", get_all_updated_receipts_txn
)
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,))
# We use this method to invalidate so that we don't end up with circular
# dependencies between the receipts and push action stores.
self._attempt_to_invalidate_cache(
"get_unread_event_push_actions_by_room_for_user", (room_id,)
)
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={
"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,
)
return rx_ts
def _graph_to_linear(
self, txn: LoggingTransaction, room_id: str, event_ids: List[str]
) -> str:
"""
Generate a linearized event from a list of events (i.e. a list of forward
extremities in the room).
This should allow for calculation of the correct read receipt even if
servers have different event ordering.
Args:
txn: The transaction
room_id: The room ID the events are in.
event_ids: The list of event IDs to linearize.
Returns:
The linearized event ID.
"""
# TODO: Make this better.
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,
)
txn.execute(sql, [room_id] + list(args))
rows = txn.fetchall()
if rows:
return rows[0][0]
else:
raise RuntimeError("Unrecognized event_ids: %r" % (event_ids,))
async def insert_receipt(
self,
room_id: str,
receipt_type: str,
user_id: str,
event_ids: List[str],
data: dict,
) -> Optional[Tuple[int, int]]:
"""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.
"""
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.
linearized_event_id = await self.db_pool.runInteraction(
"insert_receipt_conv", self._graph_to_linear, room_id, event_ids
)
async with self._receipts_id_gen.get_next() as stream_id: # type: ignore[attr-defined]
event_ts = await self.db_pool.runInteraction(
"insert_linearized_receipt",
self._insert_linearized_receipt_txn,
room_id,
receipt_type,
user_id,
linearized_event_id,
data,
stream_id=stream_id,
# Read committed is actually beneficial here because we check for a receipt with
# greater stream order, and checking the very latest data at select time is better
# than the data at transaction start time.
isolation_level=IsolationLevel.READ_COMMITTED,
)
# 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.db_pool.runInteraction(
"insert_graph_receipt",
self._insert_graph_receipt_txn,
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
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_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 ReceiptsWorkerStore(SQLBaseStore):
def __init__(self, database: DatabasePool, db_conn, hs):
self._instance_name = hs.get_instance_name()
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)
self._receipts_stream_cache = StreamChangeCache(
"ReceiptsRoomChangeCache", self.get_max_receipt_stream_id())
def get_max_receipt_stream_id(self):
"""Get the current max stream ID for receipts stream
Returns:
int
"""
return self._receipts_id_gen.get_current_token()
@cached()
async def get_users_with_read_receipts_in_room(self, room_id):
receipts = await self.get_receipts_for_room(room_id, "m.read")
return {r["user_id"] for r in receipts}
@cached(num_args=2)
async def get_receipts_for_room(self, room_id: str,
receipt_type: str) -> List[Dict[str, Any]]:
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",
)
@cached(num_args=3)
async def get_last_receipt_event_id_for_user(
self, user_id: str, room_id: str,
receipt_type: str) -> Optional[str]:
return await self.db_pool.simple_select_one_onecol(
table="receipts_linearized",
keyvalues={
"room_id": room_id,
"receipt_type": receipt_type,
"user_id": user_id,
},
retcol="event_id",
desc="get_own_receipt_for_user",
allow_none=True,
)
@cached(num_args=2)
async def get_receipts_for_user(self, user_id, receipt_type):
rows = await self.db_pool.simple_select_list(
table="receipts_linearized",
keyvalues={
"user_id": user_id,
"receipt_type": receipt_type
},
retcols=("room_id", "event_id"),
desc="get_receipts_for_user",
)
return {row["room_id"]: row["event_id"] for row in rows}
async def get_receipts_for_user_with_orderings(self, user_id,
receipt_type):
def f(txn):
sql = ("SELECT rl.room_id, rl.event_id,"
" e.topological_ordering, e.stream_ordering"
" FROM receipts_linearized AS rl"
" INNER JOIN events AS e USING (room_id, event_id)"
" WHERE rl.room_id = e.room_id"
" AND rl.event_id = e.event_id"
" AND user_id = ?")
txn.execute(sql, (user_id, ))
return 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
}
async def get_linearized_receipts_for_rooms(
self,
room_ids: List[str],
to_key: int,
from_key: Optional[int] = None) -> List[dict]:
"""Get receipts for multiple rooms for sending to clients.
Args:
room_id: List of room_ids.
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 list of receipts.
"""
room_ids = set(room_ids)
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]:
"""Get receipts for a single room for sending to clients.
Args:
room_ids: The room id.
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 list of receipts.
"""
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(num_args=3, tree=True)
async def _get_linearized_receipts_for_room(
self,
room_id: str,
to_key: int,
from_key: Optional[int] = None) -> List[dict]:
"""See get_linearized_receipts_for_room"""
def f(txn):
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))
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 = {}
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,
to_key,
from_key=None):
if not room_ids:
return {}
def f(txn):
if from_key:
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)
txn.execute(sql + clause, [from_key, to_key] + list(args))
else:
sql = """
SELECT * FROM receipts_linearized WHERE
stream_id <= ? AND
"""
clause, args = make_in_list_sql_clause(self.database_engine,
"room_id", room_ids)
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 = {}
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:
# {"$foo:bar": { "read": { "@user:host": <receipt> }, .. }, .. }
event_entry = room_event["content"].setdefault(row["event_id"], {})
receipt_type = event_entry.setdefault(row["receipt_type"], {})
receipt_type[row["user_id"]] = db_to_json(row["data"])
results = {
room_id: [results[room_id]] if room_id in results else []
for room_id in room_ids
}
return results
@cached(
num_args=2, )
async def get_linearized_receipts_for_all_rooms(
self,
to_key: int,
from_key: Optional[int] = None) -> Dict[str, JsonDict]:
"""Get receipts for all rooms between two stream_ids, up
to a limit of the latest 100 read receipts.
Args:
to_key: Max stream id to fetch receipts up to.
from_key: Min stream id to fetch receipts from. None fetches
from the start.
Returns:
A dictionary of roomids to a list of receipts.
"""
def f(txn):
if from_key:
sql = """
SELECT * FROM receipts_linearized WHERE
stream_id > ? AND stream_id <= ?
ORDER BY stream_id DESC
LIMIT 100
"""
txn.execute(sql, [from_key, to_key])
else:
sql = """
SELECT * FROM receipts_linearized WHERE
stream_id <= ?
ORDER BY stream_id DESC
LIMIT 100
"""
txn.execute(sql, [to_key])
return self.db_pool.cursor_to_dict(txn)
txn_results = await self.db_pool.runInteraction(
"get_linearized_receipts_for_all_rooms", f)
results = {}
for row in txn_results:
# We want a single event per room, since we want to batch the
# receipts by room, event and type.
room_event = results.setdefault(
row["room_id"],
{
"type": "m.receipt",
"room_id": row["room_id"],
"content": {}
},
)
# The content is of the form:
# {"$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.
"""
if last_id == current_id:
return defer.succeed([])
def _get_users_sent_receipts_between_txn(txn):
sql = """
SELECT DISTINCT user_id FROM receipts_linearized
WHERE ? < stream_id AND stream_id <= ?
"""
txn.execute(sql, (last_id, current_id))
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):
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 = [(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("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):
if receipt_type != "m.read":
return
res = self.get_users_with_read_receipts_in_room.cache.get_immediate(
room_id, None, update_metrics=False)
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
self.get_users_with_read_receipts_in_room.invalidate((room_id, ))
def invalidate_caches_for_receipt(self, room_id, receipt_type, user_id):
self.get_receipts_for_user.invalidate((user_id, receipt_type))
self._get_linearized_receipts_for_room.invalidate_many((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, instance_name, token,
rows):
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, room_id, receipt_type,
user_id, event_id, data, stream_id):
"""Inserts a read-receipt into the database if it's newer than the current RR
Returns: int|None
None if the RR is older than the current RR
otherwise, the rx timestamp of the event that the RR 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={
"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 == "m.read" and stream_ordering is not None:
self._remove_old_push_actions_before_txn(
txn,
room_id=room_id,
user_id=user_id,
stream_ordering=stream_ordering)
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]]:
"""Insert a receipt, either from local client or remote server.
Automatically does conversion between linearized and graph
representations.
"""
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.
# TODO: Make this better.
def graph_to_linear(txn):
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, )
txn.execute(sql, [room_id] + list(args))
rows = txn.fetchall()
if rows:
return rows[0][0]
else:
raise RuntimeError("Unrecognized event_ids: %r" %
(event_ids, ))
linearized_event_id = await self.db_pool.runInteraction(
"insert_receipt_conv", graph_to_linear)
async with self._receipts_id_gen.get_next() as stream_id:
event_ts = await self.db_pool.runInteraction(
"insert_linearized_receipt",
self.insert_linearized_receipt_txn,
room_id,
receipt_type,
user_id,
linearized_event_id,
data,
stream_id=stream_id,
)
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, receipt_type, user_id,
event_ids, data):
assert self._can_write_to_receipts
return await self.db_pool.runInteraction(
"insert_graph_receipt",
self.insert_graph_receipt_txn,
room_id,
receipt_type,
user_id,
event_ids,
data,
)
def insert_graph_receipt_txn(self, txn, room_id, receipt_type, user_id,
event_ids, data):
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.invalidate,
(user_id, receipt_type))
# FIXME: This shouldn't invalidate the whole cache
txn.call_after(self._get_linearized_receipts_for_room.invalidate_many,
(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 ReceiptsWorkerStore(SQLBaseStore):
"""This is an abstract base class where subclasses must implement
`get_max_receipt_stream_id` which can be called in the initializer.
"""
# This ABCMeta metaclass ensures that we cannot be instantiated without
# the abstract methods being implemented.
__metaclass__ = abc.ABCMeta
def __init__(self, db_conn, hs):
super(ReceiptsWorkerStore, self).__init__(db_conn, hs)
self._receipts_stream_cache = StreamChangeCache(
"ReceiptsRoomChangeCache", self.get_max_receipt_stream_id()
)
@abc.abstractmethod
def get_max_receipt_stream_id(self):
"""Get the current max stream ID for receipts stream
Returns:
int
"""
raise NotImplementedError()
@cachedInlineCallbacks()
def get_users_with_read_receipts_in_room(self, room_id):
receipts = yield self.get_receipts_for_room(room_id, "m.read")
defer.returnValue(set(r['user_id'] for r in receipts))
@cached(num_args=2)
def get_receipts_for_room(self, room_id, receipt_type):
return self._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",
)
@cached(num_args=3)
def get_last_receipt_event_id_for_user(self, user_id, room_id, receipt_type):
return self._simple_select_one_onecol(
table="receipts_linearized",
keyvalues={
"room_id": room_id,
"receipt_type": receipt_type,
"user_id": user_id
},
retcol="event_id",
desc="get_own_receipt_for_user",
allow_none=True,
)
@cachedInlineCallbacks(num_args=2)
def get_receipts_for_user(self, user_id, receipt_type):
rows = yield self._simple_select_list(
table="receipts_linearized",
keyvalues={
"user_id": user_id,
"receipt_type": receipt_type,
},
retcols=("room_id", "event_id"),
desc="get_receipts_for_user",
)
defer.returnValue({row["room_id"]: row["event_id"] for row in rows})
@defer.inlineCallbacks
def get_receipts_for_user_with_orderings(self, user_id, receipt_type):
def f(txn):
sql = (
"SELECT rl.room_id, rl.event_id,"
" e.topological_ordering, e.stream_ordering"
" FROM receipts_linearized AS rl"
" INNER JOIN events AS e USING (room_id, event_id)"
" WHERE rl.room_id = e.room_id"
" AND rl.event_id = e.event_id"
" AND user_id = ?"
)
txn.execute(sql, (user_id,))
return txn.fetchall()
rows = yield self.runInteraction(
"get_receipts_for_user_with_orderings", f
)
defer.returnValue({
row[0]: {
"event_id": row[1],
"topological_ordering": row[2],
"stream_ordering": row[3],
} for row in rows
})
@defer.inlineCallbacks
def get_linearized_receipts_for_rooms(self, room_ids, to_key, from_key=None):
"""Get receipts for multiple rooms for sending to clients.
Args:
room_ids (list): List of room_ids.
to_key (int): Max stream id to fetch receipts upto.
from_key (int): Min stream id to fetch receipts from. None fetches
from the start.
Returns:
list: A list of receipts.
"""
room_ids = set(room_ids)
if from_key is not None:
# Only ask the database about rooms where there have been new
# receipts added since `from_key`
room_ids = yield self._receipts_stream_cache.get_entities_changed(
room_ids, from_key
)
results = yield self._get_linearized_receipts_for_rooms(
room_ids, to_key, from_key=from_key
)
defer.returnValue([ev for res in results.values() for ev in res])
def get_linearized_receipts_for_room(self, room_id, to_key, from_key=None):
"""Get receipts for a single room for sending to clients.
Args:
room_ids (str): The room id.
to_key (int): Max stream id to fetch receipts upto.
from_key (int): Min stream id to fetch receipts from. None fetches
from the start.
Returns:
Deferred[list]: A list of receipts.
"""
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):
defer.succeed([])
return self._get_linearized_receipts_for_room(room_id, to_key, from_key)
@cachedInlineCallbacks(num_args=3, tree=True)
def _get_linearized_receipts_for_room(self, room_id, to_key, from_key=None):
"""See get_linearized_receipts_for_room
"""
def f(txn):
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)
)
else:
sql = (
"SELECT * FROM receipts_linearized WHERE"
" room_id = ? AND stream_id <= ?"
)
txn.execute(
sql,
(room_id, to_key)
)
rows = self.cursor_to_dict(txn)
return rows
rows = yield self.runInteraction(
"get_linearized_receipts_for_room", f
)
if not rows:
defer.returnValue([])
content = {}
for row in rows:
content.setdefault(
row["event_id"], {}
).setdefault(
row["receipt_type"], {}
)[row["user_id"]] = json.loads(row["data"])
defer.returnValue([{
"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, inlineCallbacks=True)
def _get_linearized_receipts_for_rooms(self, room_ids, to_key, from_key=None):
if not room_ids:
defer.returnValue({})
def f(txn):
if from_key:
sql = (
"SELECT * FROM receipts_linearized WHERE"
" room_id IN (%s) AND stream_id > ? AND stream_id <= ?"
) % (
",".join(["?"] * len(room_ids))
)
args = list(room_ids)
args.extend([from_key, to_key])
txn.execute(sql, args)
else:
sql = (
"SELECT * FROM receipts_linearized WHERE"
" room_id IN (%s) AND stream_id <= ?"
) % (
",".join(["?"] * len(room_ids))
)
args = list(room_ids)
args.append(to_key)
txn.execute(sql, args)
return self.cursor_to_dict(txn)
txn_results = yield self.runInteraction(
"_get_linearized_receipts_for_rooms", f
)
results = {}
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"]] = json.loads(row["data"])
results = {
room_id: [results[room_id]] if room_id in results else []
for room_id in room_ids
}
defer.returnValue(results)
def get_all_updated_receipts(self, last_id, current_id, limit=None):
if last_id == current_id:
return defer.succeed([])
def get_all_updated_receipts_txn(txn):
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"
)
args = [last_id, current_id]
if limit is not None:
sql += " LIMIT ?"
args.append(limit)
txn.execute(sql, args)
return txn.fetchall()
return self.runInteraction(
"get_all_updated_receipts", get_all_updated_receipts_txn
)
def _invalidate_get_users_with_receipts_in_room(self, room_id, receipt_type,
user_id):
if receipt_type != "m.read":
return
# Returns either an ObservableDeferred or the raw result
res = self.get_users_with_read_receipts_in_room.cache.get(
room_id, None, update_metrics=False,
)
# first handle the Deferred case
if isinstance(res, defer.Deferred):
if res.called:
res = res.result
else:
res = None
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
self.get_users_with_read_receipts_in_room.invalidate((room_id,))
class StreamWorkerStore(EventsWorkerStore, SQLBaseStore):
"""This is an abstract base class where subclasses must implement
`get_room_max_stream_ordering` and `get_room_min_stream_ordering`
which can be called in the initializer.
"""
__metaclass__ = abc.ABCMeta
def __init__(self, db_conn, hs):
super(StreamWorkerStore, self).__init__(db_conn, hs)
events_max = self.get_room_max_stream_ordering()
event_cache_prefill, min_event_val = self._get_cache_dict(
db_conn, "events",
entity_column="room_id",
stream_column="stream_ordering",
max_value=events_max,
)
self._events_stream_cache = StreamChangeCache(
"EventsRoomStreamChangeCache", min_event_val,
prefilled_cache=event_cache_prefill,
)
self._membership_stream_cache = StreamChangeCache(
"MembershipStreamChangeCache", events_max,
)
self._stream_order_on_start = self.get_room_max_stream_ordering()
@abc.abstractmethod
def get_room_max_stream_ordering(self):
raise NotImplementedError()
@abc.abstractmethod
def get_room_min_stream_ordering(self):
raise NotImplementedError()
@defer.inlineCallbacks
def get_room_events_stream_for_rooms(self, room_ids, from_key, to_key, limit=0,
order='DESC'):
from_id = RoomStreamToken.parse_stream_token(from_key).stream
room_ids = yield self._events_stream_cache.get_entities_changed(
room_ids, from_id
)
if not room_ids:
defer.returnValue({})
results = {}
room_ids = list(room_ids)
for rm_ids in (room_ids[i:i + 20] for i in range(0, len(room_ids), 20)):
res = yield make_deferred_yieldable(defer.gatherResults([
run_in_background(
self.get_room_events_stream_for_room,
room_id, from_key, to_key, limit, order=order,
)
for room_id in rm_ids
], consumeErrors=True))
results.update(dict(zip(rm_ids, res)))
defer.returnValue(results)
def get_rooms_that_changed(self, room_ids, from_key):
"""Given a list of rooms and a token, return rooms where there may have
been changes.
Args:
room_ids (list)
from_key (str): The room_key portion of a StreamToken
"""
from_key = RoomStreamToken.parse_stream_token(from_key).stream
return set(
room_id for room_id in room_ids
if self._events_stream_cache.has_entity_changed(room_id, from_key)
)
@defer.inlineCallbacks
def get_room_events_stream_for_room(self, room_id, from_key, to_key, limit=0,
order='DESC'):
"""Get new room events in stream ordering since `from_key`.
Args:
room_id (str)
from_key (str): Token from which no events are returned before
to_key (str): Token from which no events are returned after. (This
is typically the current stream token)
limit (int): Maximum number of events to return
order (str): Either "DESC" or "ASC". Determines which events are
returned when the result is limited. If "DESC" then the most
recent `limit` events are returned, otherwise returns the
oldest `limit` events.
Returns:
Deferred[tuple[list[FrozenEvent], str]]: Returns the list of
events (in ascending order) and the token from the start of
the chunk of events returned.
"""
if from_key == to_key:
defer.returnValue(([], from_key))
from_id = RoomStreamToken.parse_stream_token(from_key).stream
to_id = RoomStreamToken.parse_stream_token(to_key).stream
has_changed = yield self._events_stream_cache.has_entity_changed(
room_id, from_id
)
if not has_changed:
defer.returnValue(([], from_key))
def f(txn):
sql = (
"SELECT event_id, stream_ordering FROM events WHERE"
" room_id = ?"
" AND not outlier"
" AND stream_ordering > ? AND stream_ordering <= ?"
" ORDER BY stream_ordering %s LIMIT ?"
) % (order,)
txn.execute(sql, (room_id, from_id, to_id, limit))
rows = [_EventDictReturn(row[0], None, row[1]) for row in txn]
return rows
rows = yield self.runInteraction("get_room_events_stream_for_room", f)
ret = yield self._get_events(
[r.event_id for r in rows],
get_prev_content=True
)
self._set_before_and_after(ret, rows, topo_order=from_id is None)
if order.lower() == "desc":
ret.reverse()
if rows:
key = "s%d" % min(r.stream_ordering for r in rows)
else:
# Assume we didn't get anything because there was nothing to
# get.
key = from_key
defer.returnValue((ret, key))
@defer.inlineCallbacks
def get_membership_changes_for_user(self, user_id, from_key, to_key):
from_id = RoomStreamToken.parse_stream_token(from_key).stream
to_id = RoomStreamToken.parse_stream_token(to_key).stream
if from_key == to_key:
defer.returnValue([])
if from_id:
has_changed = self._membership_stream_cache.has_entity_changed(
user_id, int(from_id)
)
if not has_changed:
defer.returnValue([])
def f(txn):
sql = (
"SELECT m.event_id, stream_ordering FROM events AS e,"
" room_memberships AS m"
" WHERE e.event_id = m.event_id"
" AND m.user_id = ?"
" AND e.stream_ordering > ? AND e.stream_ordering <= ?"
" ORDER BY e.stream_ordering ASC"
)
txn.execute(sql, (user_id, from_id, to_id,))
rows = [_EventDictReturn(row[0], None, row[1]) for row in txn]
return rows
rows = yield self.runInteraction("get_membership_changes_for_user", f)
ret = yield self._get_events(
[r.event_id for r in rows],
get_prev_content=True
)
self._set_before_and_after(ret, rows, topo_order=False)
defer.returnValue(ret)
@defer.inlineCallbacks
def get_recent_events_for_room(self, room_id, limit, end_token):
"""Get the most recent events in the room in topological ordering.
Args:
room_id (str)
limit (int)
end_token (str): The stream token representing now.
Returns:
Deferred[tuple[list[FrozenEvent], str]]: Returns a list of
events and a token pointing to the start of the returned
events.
The events returned are in ascending order.
"""
rows, token = yield self.get_recent_event_ids_for_room(
room_id, limit, end_token,
)
logger.debug("stream before")
events = yield self._get_events(
[r.event_id for r in rows],
get_prev_content=True
)
logger.debug("stream after")
self._set_before_and_after(events, rows)
defer.returnValue((events, token))
@defer.inlineCallbacks
def get_recent_event_ids_for_room(self, room_id, limit, end_token):
"""Get the most recent events in the room in topological ordering.
Args:
room_id (str)
limit (int)
end_token (str): The stream token representing now.
Returns:
Deferred[tuple[list[_EventDictReturn], str]]: Returns a list of
_EventDictReturn and a token pointing to the start of the returned
events.
The events returned are in ascending order.
"""
# Allow a zero limit here, and no-op.
if limit == 0:
defer.returnValue(([], end_token))
end_token = RoomStreamToken.parse(end_token)
rows, token = yield self.runInteraction(
"get_recent_event_ids_for_room", self._paginate_room_events_txn,
room_id, from_token=end_token, limit=limit,
)
# We want to return the results in ascending order.
rows.reverse()
defer.returnValue((rows, token))
def get_room_event_after_stream_ordering(self, room_id, stream_ordering):
"""Gets details of the first event in a room at or after a stream ordering
Args:
room_id (str):
stream_ordering (int):
Returns:
Deferred[(int, int, str)]:
(stream ordering, topological ordering, event_id)
"""
def _f(txn):
sql = (
"SELECT stream_ordering, topological_ordering, event_id"
" FROM events"
" WHERE room_id = ? AND stream_ordering >= ?"
" AND NOT outlier"
" ORDER BY stream_ordering"
" LIMIT 1"
)
txn.execute(sql, (room_id, stream_ordering, ))
return txn.fetchone()
return self.runInteraction(
"get_room_event_after_stream_ordering", _f,
)
@defer.inlineCallbacks
def get_room_events_max_id(self, room_id=None):
"""Returns the current token for rooms stream.
By default, it returns the current global stream token. Specifying a
`room_id` causes it to return the current room specific topological
token.
"""
token = yield self.get_room_max_stream_ordering()
if room_id is None:
defer.returnValue("s%d" % (token,))
else:
topo = yield self.runInteraction(
"_get_max_topological_txn", self._get_max_topological_txn,
room_id,
)
defer.returnValue("t%d-%d" % (topo, token))
def get_stream_token_for_event(self, event_id):
"""The stream token for an event
Args:
event_id(str): The id of the event to look up a stream token for.
Raises:
StoreError if the event wasn't in the database.
Returns:
A deferred "s%d" stream token.
"""
return self._simple_select_one_onecol(
table="events",
keyvalues={"event_id": event_id},
retcol="stream_ordering",
).addCallback(lambda row: "s%d" % (row,))
def get_topological_token_for_event(self, event_id):
"""The stream token for an event
Args:
event_id(str): The id of the event to look up a stream token for.
Raises:
StoreError if the event wasn't in the database.
Returns:
A deferred "t%d-%d" topological token.
"""
return self._simple_select_one(
table="events",
keyvalues={"event_id": event_id},
retcols=("stream_ordering", "topological_ordering"),
desc="get_topological_token_for_event",
).addCallback(lambda row: "t%d-%d" % (
row["topological_ordering"], row["stream_ordering"],)
)
def get_max_topological_token(self, room_id, stream_key):
sql = (
"SELECT max(topological_ordering) FROM events"
" WHERE room_id = ? AND stream_ordering < ?"
)
return self._execute(
"get_max_topological_token", None,
sql, room_id, stream_key,
).addCallback(
lambda r: r[0][0] if r else 0
)
def _get_max_topological_txn(self, txn, room_id):
txn.execute(
"SELECT MAX(topological_ordering) FROM events"
" WHERE room_id = ?",
(room_id,)
)
rows = txn.fetchall()
return rows[0][0] if rows else 0
@staticmethod
def _set_before_and_after(events, rows, topo_order=True):
"""Inserts ordering information to events' internal metadata from
the DB rows.
Args:
events (list[FrozenEvent])
rows (list[_EventDictReturn])
topo_order (bool): Whether the events were ordered topologically
or by stream ordering. If true then all rows should have a non
null topological_ordering.
"""
for event, row in zip(events, rows):
stream = row.stream_ordering
if topo_order and row.topological_ordering:
topo = row.topological_ordering
else:
topo = None
internal = event.internal_metadata
internal.before = str(RoomStreamToken(topo, stream - 1))
internal.after = str(RoomStreamToken(topo, stream))
internal.order = (
int(topo) if topo else 0,
int(stream),
)
@defer.inlineCallbacks
def get_events_around(
self, room_id, event_id, before_limit, after_limit, event_filter=None,
):
"""Retrieve events and pagination tokens around a given event in a
room.
Args:
room_id (str)
event_id (str)
before_limit (int)
after_limit (int)
event_filter (Filter|None)
Returns:
dict
"""
results = yield self.runInteraction(
"get_events_around", self._get_events_around_txn,
room_id, event_id, before_limit, after_limit, event_filter,
)
events_before = yield self._get_events(
[e for e in results["before"]["event_ids"]],
get_prev_content=True
)
events_after = yield self._get_events(
[e for e in results["after"]["event_ids"]],
get_prev_content=True
)
defer.returnValue({
"events_before": events_before,
"events_after": events_after,
"start": results["before"]["token"],
"end": results["after"]["token"],
})
def _get_events_around_txn(
self, txn, room_id, event_id, before_limit, after_limit, event_filter,
):
"""Retrieves event_ids and pagination tokens around a given event in a
room.
Args:
room_id (str)
event_id (str)
before_limit (int)
after_limit (int)
event_filter (Filter|None)
Returns:
dict
"""
results = self._simple_select_one_txn(
txn,
"events",
keyvalues={
"event_id": event_id,
"room_id": room_id,
},
retcols=["stream_ordering", "topological_ordering"],
)
# Paginating backwards includes the event at the token, but paginating
# forward doesn't.
before_token = RoomStreamToken(
results["topological_ordering"] - 1,
results["stream_ordering"],
)
after_token = RoomStreamToken(
results["topological_ordering"],
results["stream_ordering"],
)
rows, start_token = self._paginate_room_events_txn(
txn, room_id, before_token, direction='b', limit=before_limit,
event_filter=event_filter,
)
events_before = [r.event_id for r in rows]
rows, end_token = self._paginate_room_events_txn(
txn, room_id, after_token, direction='f', limit=after_limit,
event_filter=event_filter,
)
events_after = [r.event_id for r in rows]
return {
"before": {
"event_ids": events_before,
"token": start_token,
},
"after": {
"event_ids": events_after,
"token": end_token,
},
}
@defer.inlineCallbacks
def get_all_new_events_stream(self, from_id, current_id, limit):
"""Get all new events
Returns all events with from_id < stream_ordering <= current_id.
Args:
from_id (int): the stream_ordering of the last event we processed
current_id (int): the stream_ordering of the most recently processed event
limit (int): the maximum number of events to return
Returns:
Deferred[Tuple[int, list[FrozenEvent]]]: A tuple of (next_id, events), where
`next_id` is the next value to pass as `from_id` (it will either be the
stream_ordering of the last returned event, or, if fewer than `limit` events
were found, `current_id`.
"""
def get_all_new_events_stream_txn(txn):
sql = (
"SELECT e.stream_ordering, e.event_id"
" FROM events AS e"
" WHERE"
" ? < e.stream_ordering AND e.stream_ordering <= ?"
" ORDER BY e.stream_ordering ASC"
" LIMIT ?"
)
txn.execute(sql, (from_id, current_id, limit))
rows = txn.fetchall()
upper_bound = current_id
if len(rows) == limit:
upper_bound = rows[-1][0]
return upper_bound, [row[1] for row in rows]
upper_bound, event_ids = yield self.runInteraction(
"get_all_new_events_stream", get_all_new_events_stream_txn,
)
events = yield self._get_events(event_ids)
defer.returnValue((upper_bound, events))
def get_federation_out_pos(self, typ):
return self._simple_select_one_onecol(
table="federation_stream_position",
retcol="stream_id",
keyvalues={"type": typ},
desc="get_federation_out_pos"
)
def update_federation_out_pos(self, typ, stream_id):
return self._simple_update_one(
table="federation_stream_position",
keyvalues={"type": typ},
updatevalues={"stream_id": stream_id},
desc="update_federation_out_pos",
)
def has_room_changed_since(self, room_id, stream_id):
return self._events_stream_cache.has_entity_changed(room_id, stream_id)
def _paginate_room_events_txn(self, txn, room_id, from_token, to_token=None,
direction='b', limit=-1, event_filter=None):
"""Returns list of events before or after a given token.
Args:
txn
room_id (str)
from_token (RoomStreamToken): The token used to stream from
to_token (RoomStreamToken|None): A token which if given limits the
results to only those before
direction(char): Either 'b' or 'f' to indicate whether we are
paginating forwards or backwards from `from_key`.
limit (int): The maximum number of events to return.
event_filter (Filter|None): If provided filters the events to
those that match the filter.
Returns:
Deferred[tuple[list[_EventDictReturn], str]]: Returns the results
as a list of _EventDictReturn and a token that points to the end
of the result set.
"""
assert int(limit) >= 0
# Tokens really represent positions between elements, but we use
# the convention of pointing to the event before the gap. Hence
# we have a bit of asymmetry when it comes to equalities.
args = [False, room_id]
if direction == 'b':
order = "DESC"
bounds = upper_bound(
from_token, self.database_engine
)
if to_token:
bounds = "%s AND %s" % (bounds, lower_bound(
to_token, self.database_engine
))
else:
order = "ASC"
bounds = lower_bound(
from_token, self.database_engine
)
if to_token:
bounds = "%s AND %s" % (bounds, upper_bound(
to_token, self.database_engine
))
filter_clause, filter_args = filter_to_clause(event_filter)
if filter_clause:
bounds += " AND " + filter_clause
args.extend(filter_args)
args.append(int(limit))
sql = (
"SELECT event_id, topological_ordering, stream_ordering"
" FROM events"
" WHERE outlier = ? AND room_id = ? AND %(bounds)s"
" ORDER BY topological_ordering %(order)s,"
" stream_ordering %(order)s LIMIT ?"
) % {
"bounds": bounds,
"order": order,
}
txn.execute(sql, args)
rows = [_EventDictReturn(row[0], row[1], row[2]) for row in txn]
if rows:
topo = rows[-1].topological_ordering
toke = rows[-1].stream_ordering
if direction == 'b':
# Tokens are positions between events.
# This token points *after* the last event in the chunk.
# We need it to point to the event before it in the chunk
# when we are going backwards so we subtract one from the
# stream part.
toke -= 1
next_token = RoomStreamToken(topo, toke)
else:
# TODO (erikj): We should work out what to do here instead.
next_token = to_token if to_token else from_token
return rows, str(next_token),
@defer.inlineCallbacks
def paginate_room_events(self, room_id, from_key, to_key=None,
direction='b', limit=-1, event_filter=None):
"""Returns list of events before or after a given token.
Args:
room_id (str)
from_key (str): The token used to stream from
to_key (str|None): A token which if given limits the results to
only those before
direction(char): Either 'b' or 'f' to indicate whether we are
paginating forwards or backwards from `from_key`.
limit (int): The maximum number of events to return. Zero or less
means no limit.
event_filter (Filter|None): If provided filters the events to
those that match the filter.
Returns:
tuple[list[dict], str]: Returns the results as a list of dicts and
a token that points to the end of the result set. The dicts have
the keys "event_id", "topological_ordering" and "stream_orderign".
"""
from_key = RoomStreamToken.parse(from_key)
if to_key:
to_key = RoomStreamToken.parse(to_key)
rows, token = yield self.runInteraction(
"paginate_room_events", self._paginate_room_events_txn,
room_id, from_key, to_key, direction, limit, event_filter,
)
events = yield self._get_events(
[r.event_id for r in rows],
get_prev_content=True
)
self._set_before_and_after(events, rows)
defer.returnValue((events, token))
class StreamWorkerStore(EventsWorkerStore, SQLBaseStore,
metaclass=abc.ABCMeta):
"""This is an abstract base class where subclasses must implement
`get_room_max_stream_ordering` and `get_room_min_stream_ordering`
which can be called in the initializer.
"""
def __init__(self, database: DatabasePool, db_conn, hs: "HomeServer"):
super().__init__(database, db_conn, hs)
self._instance_name = hs.get_instance_name()
self._send_federation = hs.should_send_federation()
self._federation_shard_config = hs.config.worker.federation_shard_config
# If we're a process that sends federation we may need to reset the
# `federation_stream_position` table to match the current sharding
# config. We don't do this now as otherwise two processes could conflict
# during startup which would cause one to die.
self._need_to_reset_federation_stream_positions = self._send_federation
events_max = self.get_room_max_stream_ordering()
event_cache_prefill, min_event_val = self.db_pool.get_cache_dict(
db_conn,
"events",
entity_column="room_id",
stream_column="stream_ordering",
max_value=events_max,
)
self._events_stream_cache = StreamChangeCache(
"EventsRoomStreamChangeCache",
min_event_val,
prefilled_cache=event_cache_prefill,
)
self._membership_stream_cache = StreamChangeCache(
"MembershipStreamChangeCache", events_max)
self._stream_order_on_start = self.get_room_max_stream_ordering()
@abc.abstractmethod
def get_room_max_stream_ordering(self) -> int:
raise NotImplementedError()
@abc.abstractmethod
def get_room_min_stream_ordering(self) -> int:
raise NotImplementedError()
def get_room_max_token(self) -> RoomStreamToken:
"""Get a `RoomStreamToken` that marks the current maximum persisted
position of the events stream. Useful to get a token that represents
"now".
The token returned is a "live" token that may have an instance_map
component.
"""
min_pos = self._stream_id_gen.get_current_token()
positions = {}
if isinstance(self._stream_id_gen, MultiWriterIdGenerator):
# The `min_pos` is the minimum position that we know all instances
# have finished persisting to, so we only care about instances whose
# positions are ahead of that. (Instance positions can be behind the
# min position as there are times we can work out that the minimum
# position is ahead of the naive minimum across all current
# positions. See MultiWriterIdGenerator for details)
positions = {
i: p
for i, p in self._stream_id_gen.get_positions().items()
if p > min_pos
}
return RoomStreamToken(None, min_pos, frozendict(positions))
async def get_room_events_stream_for_rooms(
self,
room_ids: Collection[str],
from_key: RoomStreamToken,
to_key: RoomStreamToken,
limit: int = 0,
order: str = "DESC",
) -> Dict[str, Tuple[List[EventBase], RoomStreamToken]]:
"""Get new room events in stream ordering since `from_key`.
Args:
room_ids
from_key: Token from which no events are returned before
to_key: Token from which no events are returned after. (This
is typically the current stream token)
limit: Maximum number of events to return
order: Either "DESC" or "ASC". Determines which events are
returned when the result is limited. If "DESC" then the most
recent `limit` events are returned, otherwise returns the
oldest `limit` events.
Returns:
A map from room id to a tuple containing:
- list of recent events in the room
- stream ordering key for the start of the chunk of events returned.
"""
room_ids = self._events_stream_cache.get_entities_changed(
room_ids, from_key.stream)
if not room_ids:
return {}
results = {}
room_ids = list(room_ids)
for rm_ids in (room_ids[i:i + 20]
for i in range(0, len(room_ids), 20)):
res = await make_deferred_yieldable(
defer.gatherResults(
[
run_in_background(
self.get_room_events_stream_for_room,
room_id,
from_key,
to_key,
limit,
order=order,
) for room_id in rm_ids
],
consumeErrors=True,
))
results.update(dict(zip(rm_ids, res)))
return results
def get_rooms_that_changed(self, room_ids: Collection[str],
from_key: RoomStreamToken) -> Set[str]:
"""Given a list of rooms and a token, return rooms where there may have
been changes.
"""
from_id = from_key.stream
return {
room_id
for room_id in room_ids
if self._events_stream_cache.has_entity_changed(room_id, from_id)
}
async def get_room_events_stream_for_room(
self,
room_id: str,
from_key: RoomStreamToken,
to_key: RoomStreamToken,
limit: int = 0,
order: str = "DESC",
) -> Tuple[List[EventBase], RoomStreamToken]:
"""Get new room events in stream ordering since `from_key`.
Args:
room_id
from_key: Token from which no events are returned before
to_key: Token from which no events are returned after. (This
is typically the current stream token)
limit: Maximum number of events to return
order: Either "DESC" or "ASC". Determines which events are
returned when the result is limited. If "DESC" then the most
recent `limit` events are returned, otherwise returns the
oldest `limit` events.
Returns:
The list of events (in ascending stream order) and the token from the start
of the chunk of events returned.
"""
if from_key == to_key:
return [], from_key
has_changed = self._events_stream_cache.has_entity_changed(
room_id, from_key.stream)
if not has_changed:
return [], from_key
def f(txn: LoggingTransaction) -> List[_EventDictReturn]:
# To handle tokens with a non-empty instance_map we fetch more
# results than necessary and then filter down
min_from_id = from_key.stream
max_to_id = to_key.get_max_stream_pos()
sql = """
SELECT event_id, instance_name, topological_ordering, stream_ordering
FROM events
WHERE
room_id = ?
AND not outlier
AND stream_ordering > ? AND stream_ordering <= ?
ORDER BY stream_ordering %s LIMIT ?
""" % (order, )
txn.execute(sql, (room_id, min_from_id, max_to_id, 2 * limit))
rows = [
_EventDictReturn(event_id, None, stream_ordering) for event_id,
instance_name, topological_ordering, stream_ordering in txn
if _filter_results(
from_key,
to_key,
instance_name,
topological_ordering,
stream_ordering,
)
][:limit]
return rows
rows = await self.db_pool.runInteraction(
"get_room_events_stream_for_room", f)
ret = await self.get_events_as_list([r.event_id for r in rows],
get_prev_content=True)
self._set_before_and_after(ret, rows, topo_order=False)
if order.lower() == "desc":
ret.reverse()
if rows:
key = RoomStreamToken(None, min(r.stream_ordering for r in rows))
else:
# Assume we didn't get anything because there was nothing to
# get.
key = from_key
return ret, key
async def get_membership_changes_for_user(
self, user_id: str, from_key: RoomStreamToken,
to_key: RoomStreamToken) -> List[EventBase]:
"""Fetch membership events for a given user.
All such events whose stream ordering `s` lies in the range
`from_key < s <= to_key` are returned. Events are ordered by ascending stream
order.
"""
# Start by ruling out cases where a DB query is not necessary.
if from_key == to_key:
return []
if from_key:
has_changed = self._membership_stream_cache.has_entity_changed(
user_id, int(from_key.stream))
if not has_changed:
return []
def f(txn: LoggingTransaction) -> List[_EventDictReturn]:
# To handle tokens with a non-empty instance_map we fetch more
# results than necessary and then filter down
min_from_id = from_key.stream
max_to_id = to_key.get_max_stream_pos()
sql = """
SELECT m.event_id, instance_name, topological_ordering, stream_ordering
FROM events AS e, room_memberships AS m
WHERE e.event_id = m.event_id
AND m.user_id = ?
AND e.stream_ordering > ? AND e.stream_ordering <= ?
ORDER BY e.stream_ordering ASC
"""
txn.execute(
sql,
(
user_id,
min_from_id,
max_to_id,
),
)
rows = [
_EventDictReturn(event_id, None, stream_ordering) for event_id,
instance_name, topological_ordering, stream_ordering in txn
if _filter_results(
from_key,
to_key,
instance_name,
topological_ordering,
stream_ordering,
)
]
return rows
rows = await self.db_pool.runInteraction(
"get_membership_changes_for_user", f)
ret = await self.get_events_as_list([r.event_id for r in rows],
get_prev_content=True)
self._set_before_and_after(ret, rows, topo_order=False)
return ret
async def get_recent_events_for_room(
self, room_id: str, limit: int, end_token: RoomStreamToken
) -> Tuple[List[EventBase], RoomStreamToken]:
"""Get the most recent events in the room in topological ordering.
Args:
room_id
limit
end_token: The stream token representing now.
Returns:
A list of events and a token pointing to the start of the returned
events. The events returned are in ascending topological order.
"""
rows, token = await self.get_recent_event_ids_for_room(
room_id, limit, end_token)
events = await self.get_events_as_list([r.event_id for r in rows],
get_prev_content=True)
self._set_before_and_after(events, rows)
return events, token
async def get_recent_event_ids_for_room(
self, room_id: str, limit: int, end_token: RoomStreamToken
) -> Tuple[List[_EventDictReturn], RoomStreamToken]:
"""Get the most recent events in the room in topological ordering.
Args:
room_id
limit
end_token: The stream token representing now.
Returns:
A list of _EventDictReturn and a token pointing to the start of the
returned events. The events returned are in ascending order.
"""
# Allow a zero limit here, and no-op.
if limit == 0:
return [], end_token
rows, token = await self.db_pool.runInteraction(
"get_recent_event_ids_for_room",
self._paginate_room_events_txn,
room_id,
from_token=end_token,
limit=limit,
)
# We want to return the results in ascending order.
rows.reverse()
return rows, token
async def get_room_event_before_stream_ordering(
self, room_id: str,
stream_ordering: int) -> Optional[Tuple[int, int, str]]:
"""Gets details of the first event in a room at or before a stream ordering
Args:
room_id:
stream_ordering:
Returns:
A tuple of (stream ordering, topological ordering, event_id)
"""
def _f(txn):
sql = ("SELECT stream_ordering, topological_ordering, event_id"
" FROM events"
" WHERE room_id = ? AND stream_ordering <= ?"
" AND NOT outlier"
" ORDER BY stream_ordering DESC"
" LIMIT 1")
txn.execute(sql, (room_id, stream_ordering))
return txn.fetchone()
return await self.db_pool.runInteraction(
"get_room_event_before_stream_ordering", _f)
async def get_room_events_max_id(self,
room_id: Optional[str] = None) -> str:
"""Returns the current token for rooms stream.
By default, it returns the current global stream token. Specifying a
`room_id` causes it to return the current room specific topological
token.
"""
token = self.get_room_max_stream_ordering()
if room_id is None:
return "s%d" % (token, )
else:
topo = await self.db_pool.runInteraction(
"_get_max_topological_txn", self._get_max_topological_txn,
room_id)
return "t%d-%d" % (topo, token)
def get_stream_id_for_event_txn(
self,
txn: LoggingTransaction,
event_id: str,
allow_none=False,
) -> int:
return self.db_pool.simple_select_one_onecol_txn(
txn=txn,
table="events",
keyvalues={"event_id": event_id},
retcol="stream_ordering",
allow_none=allow_none,
)
async def get_position_for_event(self,
event_id: str) -> PersistedEventPosition:
"""Get the persisted position for an event"""
row = await self.db_pool.simple_select_one(
table="events",
keyvalues={"event_id": event_id},
retcols=("stream_ordering", "instance_name"),
desc="get_position_for_event",
)
return PersistedEventPosition(row["instance_name"] or "master",
row["stream_ordering"])
async def get_topological_token_for_event(
self, event_id: str) -> RoomStreamToken:
"""The stream token for an event
Args:
event_id: The id of the event to look up a stream token for.
Raises:
StoreError if the event wasn't in the database.
Returns:
A `RoomStreamToken` topological token.
"""
row = await self.db_pool.simple_select_one(
table="events",
keyvalues={"event_id": event_id},
retcols=("stream_ordering", "topological_ordering"),
desc="get_topological_token_for_event",
)
return RoomStreamToken(row["topological_ordering"],
row["stream_ordering"])
async def get_current_topological_token(self, room_id: str,
stream_key: int) -> int:
"""Gets the topological token in a room after or at the given stream
ordering.
Args:
room_id
stream_key
"""
sql = ("SELECT coalesce(MIN(topological_ordering), 0) FROM events"
" WHERE room_id = ? AND stream_ordering >= ?")
row = await self.db_pool.execute("get_current_topological_token", None,
sql, room_id, stream_key)
return row[0][0] if row else 0
def _get_max_topological_txn(self, txn: LoggingTransaction,
room_id: str) -> int:
txn.execute(
"SELECT MAX(topological_ordering) FROM events WHERE room_id = ?",
(room_id, ),
)
rows = txn.fetchall()
return rows[0][0] if rows else 0
@staticmethod
def _set_before_and_after(events: List[EventBase],
rows: List[_EventDictReturn],
topo_order: bool = True):
"""Inserts ordering information to events' internal metadata from
the DB rows.
Args:
events
rows
topo_order: Whether the events were ordered topologically or by stream
ordering. If true then all rows should have a non null
topological_ordering.
"""
for event, row in zip(events, rows):
stream = row.stream_ordering
if topo_order and row.topological_ordering:
topo = row.topological_ordering
else:
topo = None
internal = event.internal_metadata
internal.before = RoomStreamToken(topo, stream - 1)
internal.after = RoomStreamToken(topo, stream)
internal.order = (int(topo) if topo else 0, int(stream))
async def get_events_around(
self,
room_id: str,
event_id: str,
before_limit: int,
after_limit: int,
event_filter: Optional[Filter] = None,
) -> dict:
"""Retrieve events and pagination tokens around a given event in a
room.
"""
results = await self.db_pool.runInteraction(
"get_events_around",
self._get_events_around_txn,
room_id,
event_id,
before_limit,
after_limit,
event_filter,
)
events_before = await self.get_events_as_list(list(
results["before"]["event_ids"]),
get_prev_content=True)
events_after = await self.get_events_as_list(list(
results["after"]["event_ids"]),
get_prev_content=True)
return {
"events_before": events_before,
"events_after": events_after,
"start": results["before"]["token"],
"end": results["after"]["token"],
}
def _get_events_around_txn(
self,
txn: LoggingTransaction,
room_id: str,
event_id: str,
before_limit: int,
after_limit: int,
event_filter: Optional[Filter],
) -> dict:
"""Retrieves event_ids and pagination tokens around a given event in a
room.
Args:
room_id
event_id
before_limit
after_limit
event_filter
Returns:
dict
"""
results = self.db_pool.simple_select_one_txn(
txn,
"events",
keyvalues={
"event_id": event_id,
"room_id": room_id
},
retcols=["stream_ordering", "topological_ordering"],
)
# This cannot happen as `allow_none=False`.
assert results is not None
# Paginating backwards includes the event at the token, but paginating
# forward doesn't.
before_token = RoomStreamToken(results["topological_ordering"] - 1,
results["stream_ordering"])
after_token = RoomStreamToken(results["topological_ordering"],
results["stream_ordering"])
rows, start_token = self._paginate_room_events_txn(
txn,
room_id,
before_token,
direction="b",
limit=before_limit,
event_filter=event_filter,
)
events_before = [r.event_id for r in rows]
rows, end_token = self._paginate_room_events_txn(
txn,
room_id,
after_token,
direction="f",
limit=after_limit,
event_filter=event_filter,
)
events_after = [r.event_id for r in rows]
return {
"before": {
"event_ids": events_before,
"token": start_token
},
"after": {
"event_ids": events_after,
"token": end_token
},
}
async def get_all_new_events_stream(
self, from_id: int, current_id: int,
limit: int) -> Tuple[int, List[EventBase]]:
"""Get all new events
Returns all events with from_id < stream_ordering <= current_id.
Args:
from_id: the stream_ordering of the last event we processed
current_id: the stream_ordering of the most recently processed event
limit: the maximum number of events to return
Returns:
A tuple of (next_id, events), where `next_id` is the next value to
pass as `from_id` (it will either be the stream_ordering of the
last returned event, or, if fewer than `limit` events were found,
the `current_id`).
"""
def get_all_new_events_stream_txn(txn):
sql = ("SELECT e.stream_ordering, e.event_id"
" FROM events AS e"
" WHERE"
" ? < e.stream_ordering AND e.stream_ordering <= ?"
" ORDER BY e.stream_ordering ASC"
" LIMIT ?")
txn.execute(sql, (from_id, current_id, limit))
rows = txn.fetchall()
upper_bound = current_id
if len(rows) == limit:
upper_bound = rows[-1][0]
return upper_bound, [row[1] for row in rows]
upper_bound, event_ids = await self.db_pool.runInteraction(
"get_all_new_events_stream", get_all_new_events_stream_txn)
events = await self.get_events_as_list(event_ids)
return upper_bound, events
async def get_federation_out_pos(self, typ: str) -> int:
if self._need_to_reset_federation_stream_positions:
await self.db_pool.runInteraction(
"_reset_federation_positions_txn",
self._reset_federation_positions_txn)
self._need_to_reset_federation_stream_positions = False
return await self.db_pool.simple_select_one_onecol(
table="federation_stream_position",
retcol="stream_id",
keyvalues={
"type": typ,
"instance_name": self._instance_name
},
desc="get_federation_out_pos",
)
async def update_federation_out_pos(self, typ: str,
stream_id: int) -> None:
if self._need_to_reset_federation_stream_positions:
await self.db_pool.runInteraction(
"_reset_federation_positions_txn",
self._reset_federation_positions_txn)
self._need_to_reset_federation_stream_positions = False
await self.db_pool.simple_update_one(
table="federation_stream_position",
keyvalues={
"type": typ,
"instance_name": self._instance_name
},
updatevalues={"stream_id": stream_id},
desc="update_federation_out_pos",
)
def _reset_federation_positions_txn(self, txn: LoggingTransaction) -> None:
"""Fiddles with the `federation_stream_position` table to make it match
the configured federation sender instances during start up.
"""
# The federation sender instances may have changed, so we need to
# massage the `federation_stream_position` table to have a row per type
# per instance sending federation. If there is a mismatch we update the
# table with the correct rows using the *minimum* stream ID seen. This
# may result in resending of events/EDUs to remote servers, but that is
# preferable to dropping them.
if not self._send_federation:
return
# Pull out the configured instances. If we don't have a shard config then
# we assume that we're the only instance sending.
configured_instances = self._federation_shard_config.instances
if not configured_instances:
configured_instances = [self._instance_name]
elif self._instance_name not in configured_instances:
return
instances_in_table = self.db_pool.simple_select_onecol_txn(
txn,
table="federation_stream_position",
keyvalues={},
retcol="instance_name",
)
if set(instances_in_table) == set(configured_instances):
# Nothing to do
return
sql = """
SELECT type, MIN(stream_id) FROM federation_stream_position
GROUP BY type
"""
txn.execute(sql)
min_positions = {typ: pos
for typ, pos in txn} # Map from type -> min position
# Ensure we do actually have some values here
assert set(min_positions) == {"federation", "events"}
sql = """
DELETE FROM federation_stream_position
WHERE NOT (%s)
"""
clause, args = make_in_list_sql_clause(txn.database_engine,
"instance_name",
configured_instances)
txn.execute(sql % (clause, ), args)
for typ, stream_id in min_positions.items():
self.db_pool.simple_upsert_txn(
txn,
table="federation_stream_position",
keyvalues={
"type": typ,
"instance_name": self._instance_name
},
values={"stream_id": stream_id},
)
def has_room_changed_since(self, room_id: str, stream_id: int) -> bool:
return self._events_stream_cache.has_entity_changed(room_id, stream_id)
def _paginate_room_events_txn(
self,
txn: LoggingTransaction,
room_id: str,
from_token: RoomStreamToken,
to_token: Optional[RoomStreamToken] = None,
direction: str = "b",
limit: int = -1,
event_filter: Optional[Filter] = None,
) -> Tuple[List[_EventDictReturn], RoomStreamToken]:
"""Returns list of events before or after a given token.
Args:
txn
room_id
from_token: The token used to stream from
to_token: A token which if given limits the results to only those before
direction: Either 'b' or 'f' to indicate whether we are paginating
forwards or backwards from `from_key`.
limit: The maximum number of events to return.
event_filter: If provided filters the events to
those that match the filter.
Returns:
A list of _EventDictReturn and a token that points to the end of the
result set. If no events are returned then the end of the stream has
been reached (i.e. there are no events between `from_token` and
`to_token`), or `limit` is zero.
"""
assert int(limit) >= 0
# Tokens really represent positions between elements, but we use
# the convention of pointing to the event before the gap. Hence
# we have a bit of asymmetry when it comes to equalities.
args = [False, room_id]
if direction == "b":
order = "DESC"
else:
order = "ASC"
# The bounds for the stream tokens are complicated by the fact
# that we need to handle the instance_map part of the tokens. We do this
# by fetching all events between the min stream token and the maximum
# stream token (as returned by `RoomStreamToken.get_max_stream_pos`) and
# then filtering the results.
if from_token.topological is not None:
from_bound: Tuple[Optional[int],
int] = from_token.as_historical_tuple()
elif direction == "b":
from_bound = (
None,
from_token.get_max_stream_pos(),
)
else:
from_bound = (
None,
from_token.stream,
)
to_bound: Optional[Tuple[Optional[int], int]] = None
if to_token:
if to_token.topological is not None:
to_bound = to_token.as_historical_tuple()
elif direction == "b":
to_bound = (
None,
to_token.stream,
)
else:
to_bound = (
None,
to_token.get_max_stream_pos(),
)
bounds = generate_pagination_where_clause(
direction=direction,
column_names=("event.topological_ordering",
"event.stream_ordering"),
from_token=from_bound,
to_token=to_bound,
engine=self.database_engine,
)
filter_clause, filter_args = filter_to_clause(event_filter)
if filter_clause:
bounds += " AND " + filter_clause
args.extend(filter_args)
# We fetch more events as we'll filter the result set
args.append(int(limit) * 2)
select_keywords = "SELECT"
join_clause = ""
# Using DISTINCT in this SELECT query is quite expensive, because it
# requires the engine to sort on the entire (not limited) result set,
# i.e. the entire events table. Only use it in scenarios that could result
# in the same event ID occurring multiple times in the results.
needs_distinct = False
if event_filter and event_filter.labels:
# If we're not filtering on a label, then joining on event_labels will
# return as many row for a single event as the number of labels it has. To
# avoid this, only join if we're filtering on at least one label.
join_clause += """
LEFT JOIN event_labels
USING (event_id, room_id, topological_ordering)
"""
if len(event_filter.labels) > 1:
# Multiple labels could cause the same event to appear multiple times.
needs_distinct = True
# If there is a filter on relation_senders and relation_types join to the
# relations table.
if event_filter and (event_filter.relation_senders
or event_filter.relation_types):
# Filtering by relations could cause the same event to appear multiple
# times (since there's no limit on the number of relations to an event).
needs_distinct = True
join_clause += """
LEFT JOIN event_relations AS relation ON (event.event_id = relation.relates_to_id)
"""
if event_filter.relation_senders:
join_clause += """
LEFT JOIN events AS related_event ON (relation.event_id = related_event.event_id)
"""
if needs_distinct:
select_keywords += " DISTINCT"
sql = """
%(select_keywords)s
event.event_id, event.instance_name,
event.topological_ordering, event.stream_ordering
FROM events AS event
%(join_clause)s
WHERE event.outlier = ? AND event.room_id = ? AND %(bounds)s
ORDER BY event.topological_ordering %(order)s,
event.stream_ordering %(order)s LIMIT ?
""" % {
"select_keywords": select_keywords,
"join_clause": join_clause,
"bounds": bounds,
"order": order,
}
txn.execute(sql, args)
# Filter the result set.
rows = [
_EventDictReturn(event_id, topological_ordering, stream_ordering)
for event_id, instance_name, topological_ordering, stream_ordering
in txn if _filter_results(
lower_token=to_token if direction == "b" else from_token,
upper_token=from_token if direction == "b" else to_token,
instance_name=instance_name,
topological_ordering=topological_ordering,
stream_ordering=stream_ordering,
)
][:limit]
if rows:
topo = rows[-1].topological_ordering
toke = rows[-1].stream_ordering
if direction == "b":
# Tokens are positions between events.
# This token points *after* the last event in the chunk.
# We need it to point to the event before it in the chunk
# when we are going backwards so we subtract one from the
# stream part.
toke -= 1
next_token = RoomStreamToken(topo, toke)
else:
# TODO (erikj): We should work out what to do here instead.
next_token = to_token if to_token else from_token
return rows, next_token
async def paginate_room_events(
self,
room_id: str,
from_key: RoomStreamToken,
to_key: Optional[RoomStreamToken] = None,
direction: str = "b",
limit: int = -1,
event_filter: Optional[Filter] = None,
) -> Tuple[List[EventBase], RoomStreamToken]:
"""Returns list of events before or after a given token.
Args:
room_id
from_key: The token used to stream from
to_key: A token which if given limits the results to only those before
direction: Either 'b' or 'f' to indicate whether we are paginating
forwards or backwards from `from_key`.
limit: The maximum number of events to return.
event_filter: If provided filters the events to those that match the filter.
Returns:
The results as a list of events and a token that points to the end
of the result set. If no events are returned then the end of the
stream has been reached (i.e. there are no events between `from_key`
and `to_key`).
"""
rows, token = await self.db_pool.runInteraction(
"paginate_room_events",
self._paginate_room_events_txn,
room_id,
from_key,
to_key,
direction,
limit,
event_filter,
)
events = await self.get_events_as_list([r.event_id for r in rows],
get_prev_content=True)
self._set_before_and_after(events, rows)
return events, token
@cached()
async def get_id_for_instance(self, instance_name: str) -> int:
"""Get a unique, immutable ID that corresponds to the given Synapse worker instance."""
def _get_id_for_instance_txn(txn):
instance_id = self.db_pool.simple_select_one_onecol_txn(
txn,
table="instance_map",
keyvalues={"instance_name": instance_name},
retcol="instance_id",
allow_none=True,
)
if instance_id is not None:
return instance_id
# If we don't have an entry upsert one.
#
# We could do this before the first check, and rely on the cache for
# efficiency, but each UPSERT causes the next ID to increment which
# can quickly bloat the size of the generated IDs for new instances.
self.db_pool.simple_upsert_txn(
txn,
table="instance_map",
keyvalues={"instance_name": instance_name},
values={},
)
return self.db_pool.simple_select_one_onecol_txn(
txn,
table="instance_map",
keyvalues={"instance_name": instance_name},
retcol="instance_id",
)
return await self.db_pool.runInteraction("get_id_for_instance",
_get_id_for_instance_txn)
@cached()
async def get_name_from_instance_id(self, instance_id: int) -> str:
"""Get the instance name from an ID previously returned by
`get_id_for_instance`.
"""
return await self.db_pool.simple_select_one_onecol(
table="instance_map",
keyvalues={"instance_id": instance_id},
retcol="instance_name",
desc="get_name_from_instance_id",
)
class StreamWorkerStore(EventsWorkerStore, SQLBaseStore):
"""This is an abstract base class where subclasses must implement
`get_room_max_stream_ordering` and `get_room_min_stream_ordering`
which can be called in the initializer.
"""
__metaclass__ = abc.ABCMeta
def __init__(self, db_conn, hs):
super(StreamWorkerStore, self).__init__(db_conn, hs)
events_max = self.get_room_max_stream_ordering()
event_cache_prefill, min_event_val = self._get_cache_dict(
db_conn, "events",
entity_column="room_id",
stream_column="stream_ordering",
max_value=events_max,
)
self._events_stream_cache = StreamChangeCache(
"EventsRoomStreamChangeCache", min_event_val,
prefilled_cache=event_cache_prefill,
)
self._membership_stream_cache = StreamChangeCache(
"MembershipStreamChangeCache", events_max,
)
self._stream_order_on_start = self.get_room_max_stream_ordering()
@abc.abstractmethod
def get_room_max_stream_ordering(self):
raise NotImplementedError()
@abc.abstractmethod
def get_room_min_stream_ordering(self):
raise NotImplementedError()
@defer.inlineCallbacks
def get_room_events_stream_for_rooms(self, room_ids, from_key, to_key, limit=0,
order='DESC'):
from_id = RoomStreamToken.parse_stream_token(from_key).stream
room_ids = yield self._events_stream_cache.get_entities_changed(
room_ids, from_id
)
if not room_ids:
defer.returnValue({})
results = {}
room_ids = list(room_ids)
for rm_ids in (room_ids[i:i + 20] for i in xrange(0, len(room_ids), 20)):
res = yield make_deferred_yieldable(defer.gatherResults([
preserve_fn(self.get_room_events_stream_for_room)(
room_id, from_key, to_key, limit, order=order,
)
for room_id in rm_ids
]))
results.update(dict(zip(rm_ids, res)))
defer.returnValue(results)
def get_rooms_that_changed(self, room_ids, from_key):
"""Given a list of rooms and a token, return rooms where there may have
been changes.
Args:
room_ids (list)
from_key (str): The room_key portion of a StreamToken
"""
from_key = RoomStreamToken.parse_stream_token(from_key).stream
return set(
room_id for room_id in room_ids
if self._events_stream_cache.has_entity_changed(room_id, from_key)
)
@defer.inlineCallbacks
def get_room_events_stream_for_room(self, room_id, from_key, to_key, limit=0,
order='DESC'):
# Note: If from_key is None then we return in topological order. This
# is because in that case we're using this as a "get the last few messages
# in a room" function, rather than "get new messages since last sync"
if from_key is not None:
from_id = RoomStreamToken.parse_stream_token(from_key).stream
else:
from_id = None
to_id = RoomStreamToken.parse_stream_token(to_key).stream
if from_key == to_key:
defer.returnValue(([], from_key))
if from_id:
has_changed = yield self._events_stream_cache.has_entity_changed(
room_id, from_id
)
if not has_changed:
defer.returnValue(([], from_key))
def f(txn):
if from_id is not None:
sql = (
"SELECT event_id, stream_ordering FROM events WHERE"
" room_id = ?"
" AND not outlier"
" AND stream_ordering > ? AND stream_ordering <= ?"
" ORDER BY stream_ordering %s LIMIT ?"
) % (order,)
txn.execute(sql, (room_id, from_id, to_id, limit))
else:
sql = (
"SELECT event_id, stream_ordering FROM events WHERE"
" room_id = ?"
" AND not outlier"
" AND stream_ordering <= ?"
" ORDER BY topological_ordering %s, stream_ordering %s LIMIT ?"
) % (order, order,)
txn.execute(sql, (room_id, to_id, limit))
rows = self.cursor_to_dict(txn)
return rows
rows = yield self.runInteraction("get_room_events_stream_for_room", f)
ret = yield self._get_events(
[r["event_id"] for r in rows],
get_prev_content=True
)
self._set_before_and_after(ret, rows, topo_order=from_id is None)
if order.lower() == "desc":
ret.reverse()
if rows:
key = "s%d" % min(r["stream_ordering"] for r in rows)
else:
# Assume we didn't get anything because there was nothing to
# get.
key = from_key
defer.returnValue((ret, key))
@defer.inlineCallbacks
def get_membership_changes_for_user(self, user_id, from_key, to_key):
if from_key is not None:
from_id = RoomStreamToken.parse_stream_token(from_key).stream
else:
from_id = None
to_id = RoomStreamToken.parse_stream_token(to_key).stream
if from_key == to_key:
defer.returnValue([])
if from_id:
has_changed = self._membership_stream_cache.has_entity_changed(
user_id, int(from_id)
)
if not has_changed:
defer.returnValue([])
def f(txn):
if from_id is not None:
sql = (
"SELECT m.event_id, stream_ordering FROM events AS e,"
" room_memberships AS m"
" WHERE e.event_id = m.event_id"
" AND m.user_id = ?"
" AND e.stream_ordering > ? AND e.stream_ordering <= ?"
" ORDER BY e.stream_ordering ASC"
)
txn.execute(sql, (user_id, from_id, to_id,))
else:
sql = (
"SELECT m.event_id, stream_ordering FROM events AS e,"
" room_memberships AS m"
" WHERE e.event_id = m.event_id"
" AND m.user_id = ?"
" AND stream_ordering <= ?"
" ORDER BY stream_ordering ASC"
)
txn.execute(sql, (user_id, to_id,))
rows = self.cursor_to_dict(txn)
return rows
rows = yield self.runInteraction("get_membership_changes_for_user", f)
ret = yield self._get_events(
[r["event_id"] for r in rows],
get_prev_content=True
)
self._set_before_and_after(ret, rows, topo_order=False)
defer.returnValue(ret)
@defer.inlineCallbacks
def get_recent_events_for_room(self, room_id, limit, end_token, from_token=None):
rows, token = yield self.get_recent_event_ids_for_room(
room_id, limit, end_token, from_token
)
logger.debug("stream before")
events = yield self._get_events(
[r["event_id"] for r in rows],
get_prev_content=True
)
logger.debug("stream after")
self._set_before_and_after(events, rows)
defer.returnValue((events, token))
@cached(num_args=4)
def get_recent_event_ids_for_room(self, room_id, limit, end_token, from_token=None):
end_token = RoomStreamToken.parse_stream_token(end_token)
if from_token is None:
sql = (
"SELECT stream_ordering, topological_ordering, event_id"
" FROM events"
" WHERE room_id = ? AND stream_ordering <= ? AND outlier = ?"
" ORDER BY topological_ordering DESC, stream_ordering DESC"
" LIMIT ?"
)
else:
from_token = RoomStreamToken.parse_stream_token(from_token)
sql = (
"SELECT stream_ordering, topological_ordering, event_id"
" FROM events"
" WHERE room_id = ? AND stream_ordering > ?"
" AND stream_ordering <= ? AND outlier = ?"
" ORDER BY topological_ordering DESC, stream_ordering DESC"
" LIMIT ?"
)
def get_recent_events_for_room_txn(txn):
if from_token is None:
txn.execute(sql, (room_id, end_token.stream, False, limit,))
else:
txn.execute(sql, (
room_id, from_token.stream, end_token.stream, False, limit
))
rows = self.cursor_to_dict(txn)
rows.reverse() # As we selected with reverse ordering
if rows:
# Tokens are positions between events.
# This token points *after* the last event in the chunk.
# We need it to point to the event before it in the chunk
# since we are going backwards so we subtract one from the
# stream part.
topo = rows[0]["topological_ordering"]
toke = rows[0]["stream_ordering"] - 1
start_token = str(RoomStreamToken(topo, toke))
token = (start_token, str(end_token))
else:
token = (str(end_token), str(end_token))
return rows, token
return self.runInteraction(
"get_recent_events_for_room", get_recent_events_for_room_txn
)
def get_room_event_after_stream_ordering(self, room_id, stream_ordering):
"""Gets details of the first event in a room at or after a stream ordering
Args:
room_id (str):
stream_ordering (int):
Returns:
Deferred[(int, int, str)]:
(stream ordering, topological ordering, event_id)
"""
def _f(txn):
sql = (
"SELECT stream_ordering, topological_ordering, event_id"
" FROM events"
" WHERE room_id = ? AND stream_ordering >= ?"
" AND NOT outlier"
" ORDER BY stream_ordering"
" LIMIT 1"
)
txn.execute(sql, (room_id, stream_ordering, ))
return txn.fetchone()
return self.runInteraction(
"get_room_event_after_stream_ordering", _f,
)
@defer.inlineCallbacks
def get_room_events_max_id(self, room_id=None):
"""Returns the current token for rooms stream.
By default, it returns the current global stream token. Specifying a
`room_id` causes it to return the current room specific topological
token.
"""
token = yield self.get_room_max_stream_ordering()
if room_id is None:
defer.returnValue("s%d" % (token,))
else:
topo = yield self.runInteraction(
"_get_max_topological_txn", self._get_max_topological_txn,
room_id,
)
defer.returnValue("t%d-%d" % (topo, token))
def get_stream_token_for_event(self, event_id):
"""The stream token for an event
Args:
event_id(str): The id of the event to look up a stream token for.
Raises:
StoreError if the event wasn't in the database.
Returns:
A deferred "s%d" stream token.
"""
return self._simple_select_one_onecol(
table="events",
keyvalues={"event_id": event_id},
retcol="stream_ordering",
).addCallback(lambda row: "s%d" % (row,))
def get_topological_token_for_event(self, event_id):
"""The stream token for an event
Args:
event_id(str): The id of the event to look up a stream token for.
Raises:
StoreError if the event wasn't in the database.
Returns:
A deferred "t%d-%d" topological token.
"""
return self._simple_select_one(
table="events",
keyvalues={"event_id": event_id},
retcols=("stream_ordering", "topological_ordering"),
desc="get_topological_token_for_event",
).addCallback(lambda row: "t%d-%d" % (
row["topological_ordering"], row["stream_ordering"],)
)
def get_max_topological_token(self, room_id, stream_key):
sql = (
"SELECT max(topological_ordering) FROM events"
" WHERE room_id = ? AND stream_ordering < ?"
)
return self._execute(
"get_max_topological_token", None,
sql, room_id, stream_key,
).addCallback(
lambda r: r[0][0] if r else 0
)
def _get_max_topological_txn(self, txn, room_id):
txn.execute(
"SELECT MAX(topological_ordering) FROM events"
" WHERE room_id = ?",
(room_id,)
)
rows = txn.fetchall()
return rows[0][0] if rows else 0
@staticmethod
def _set_before_and_after(events, rows, topo_order=True):
for event, row in zip(events, rows):
stream = row["stream_ordering"]
if topo_order:
topo = event.depth
else:
topo = None
internal = event.internal_metadata
internal.before = str(RoomStreamToken(topo, stream - 1))
internal.after = str(RoomStreamToken(topo, stream))
internal.order = (
int(topo) if topo else 0,
int(stream),
)
@defer.inlineCallbacks
def get_events_around(self, room_id, event_id, before_limit, after_limit):
"""Retrieve events and pagination tokens around a given event in a
room.
Args:
room_id (str)
event_id (str)
before_limit (int)
after_limit (int)
Returns:
dict
"""
results = yield self.runInteraction(
"get_events_around", self._get_events_around_txn,
room_id, event_id, before_limit, after_limit
)
events_before = yield self._get_events(
[e for e in results["before"]["event_ids"]],
get_prev_content=True
)
events_after = yield self._get_events(
[e for e in results["after"]["event_ids"]],
get_prev_content=True
)
defer.returnValue({
"events_before": events_before,
"events_after": events_after,
"start": results["before"]["token"],
"end": results["after"]["token"],
})
def _get_events_around_txn(self, txn, room_id, event_id, before_limit, after_limit):
"""Retrieves event_ids and pagination tokens around a given event in a
room.
Args:
room_id (str)
event_id (str)
before_limit (int)
after_limit (int)
Returns:
dict
"""
results = self._simple_select_one_txn(
txn,
"events",
keyvalues={
"event_id": event_id,
"room_id": room_id,
},
retcols=["stream_ordering", "topological_ordering"],
)
token = RoomStreamToken(
results["topological_ordering"],
results["stream_ordering"],
)
if isinstance(self.database_engine, Sqlite3Engine):
# SQLite3 doesn't optimise ``(x < a) OR (x = a AND y < b)``
# So we give pass it to SQLite3 as the UNION ALL of the two queries.
query_before = (
"SELECT topological_ordering, stream_ordering, event_id FROM events"
" WHERE room_id = ? AND topological_ordering < ?"
" UNION ALL"
" SELECT topological_ordering, stream_ordering, event_id FROM events"
" WHERE room_id = ? AND topological_ordering = ? AND stream_ordering < ?"
" ORDER BY topological_ordering DESC, stream_ordering DESC LIMIT ?"
)
before_args = (
room_id, token.topological,
room_id, token.topological, token.stream,
before_limit,
)
query_after = (
"SELECT topological_ordering, stream_ordering, event_id FROM events"
" WHERE room_id = ? AND topological_ordering > ?"
" UNION ALL"
" SELECT topological_ordering, stream_ordering, event_id FROM events"
" WHERE room_id = ? AND topological_ordering = ? AND stream_ordering > ?"
" ORDER BY topological_ordering ASC, stream_ordering ASC LIMIT ?"
)
after_args = (
room_id, token.topological,
room_id, token.topological, token.stream,
after_limit,
)
else:
query_before = (
"SELECT topological_ordering, stream_ordering, event_id FROM events"
" WHERE room_id = ? AND %s"
" ORDER BY topological_ordering DESC, stream_ordering DESC LIMIT ?"
) % (upper_bound(token, self.database_engine, inclusive=False),)
before_args = (room_id, before_limit)
query_after = (
"SELECT topological_ordering, stream_ordering, event_id FROM events"
" WHERE room_id = ? AND %s"
" ORDER BY topological_ordering ASC, stream_ordering ASC LIMIT ?"
) % (lower_bound(token, self.database_engine, inclusive=False),)
after_args = (room_id, after_limit)
txn.execute(query_before, before_args)
rows = self.cursor_to_dict(txn)
events_before = [r["event_id"] for r in rows]
if rows:
start_token = str(RoomStreamToken(
rows[0]["topological_ordering"],
rows[0]["stream_ordering"] - 1,
))
else:
start_token = str(RoomStreamToken(
token.topological,
token.stream - 1,
))
txn.execute(query_after, after_args)
rows = self.cursor_to_dict(txn)
events_after = [r["event_id"] for r in rows]
if rows:
end_token = str(RoomStreamToken(
rows[-1]["topological_ordering"],
rows[-1]["stream_ordering"],
))
else:
end_token = str(token)
return {
"before": {
"event_ids": events_before,
"token": start_token,
},
"after": {
"event_ids": events_after,
"token": end_token,
},
}
@defer.inlineCallbacks
def get_all_new_events_stream(self, from_id, current_id, limit):
"""Get all new events"""
def get_all_new_events_stream_txn(txn):
sql = (
"SELECT e.stream_ordering, e.event_id"
" FROM events AS e"
" WHERE"
" ? < e.stream_ordering AND e.stream_ordering <= ?"
" ORDER BY e.stream_ordering ASC"
" LIMIT ?"
)
txn.execute(sql, (from_id, current_id, limit))
rows = txn.fetchall()
upper_bound = current_id
if len(rows) == limit:
upper_bound = rows[-1][0]
return upper_bound, [row[1] for row in rows]
upper_bound, event_ids = yield self.runInteraction(
"get_all_new_events_stream", get_all_new_events_stream_txn,
)
events = yield self._get_events(event_ids)
defer.returnValue((upper_bound, events))
def get_federation_out_pos(self, typ):
return self._simple_select_one_onecol(
table="federation_stream_position",
retcol="stream_id",
keyvalues={"type": typ},
desc="get_federation_out_pos"
)
def update_federation_out_pos(self, typ, stream_id):
return self._simple_update_one(
table="federation_stream_position",
keyvalues={"type": typ},
updatevalues={"stream_id": stream_id},
desc="update_federation_out_pos",
)
def has_room_changed_since(self, room_id, stream_id):
return self._events_stream_cache.has_entity_changed(room_id, stream_id)
def test_get_entities_changed(self):
"""
StreamChangeCache.get_entities_changed will return the entities in the
given list that have changed since the provided stream ID. If the
stream position is earlier than the earliest known position, it will
return all of the entities queried for.
"""
cache = StreamChangeCache("#test", 1)
cache.entity_has_changed("*****@*****.**", 2)
cache.entity_has_changed("*****@*****.**", 3)
cache.entity_has_changed("*****@*****.**", 4)
# Query all the entries, but mid-way through the stream. We should only
# get the ones after that point.
self.assertEqual(
cache.get_entities_changed(
["*****@*****.**", "*****@*****.**", "*****@*****.**"], stream_pos=2
),
set(["*****@*****.**", "*****@*****.**"]),
)
# Query all the entries mid-way through the stream, but include one
# that doesn't exist in it. We shouldn't get back the one that doesn't
# exist.
self.assertEqual(
cache.get_entities_changed(
[
"*****@*****.**",
"*****@*****.**",
"*****@*****.**",
"*****@*****.**",
],
stream_pos=2,
),
set(["*****@*****.**", "*****@*****.**"]),
)
# Query all the entries, but before the first known point. We will get
# all the entries we queried for, including ones that don't exist.
self.assertEqual(
cache.get_entities_changed(
[
"*****@*****.**",
"*****@*****.**",
"*****@*****.**",
"*****@*****.**",
],
stream_pos=0,
),
set(
[
"*****@*****.**",
"*****@*****.**",
"*****@*****.**",
"*****@*****.**",
]
),
)
# Query a subset of the entries mid-way through the stream. We should
# only get back the subset.
self.assertEqual(
cache.get_entities_changed(["*****@*****.**"], stream_pos=2),
set(["*****@*****.**"]),
)
