diff options
Diffstat (limited to 'synapse/storage/stream.py')
| -rw-r--r-- | synapse/storage/stream.py | 186 |
1 files changed, 157 insertions, 29 deletions
diff --git a/synapse/storage/stream.py b/synapse/storage/stream.py index c03c983e14..87fc978813 100644 --- a/synapse/storage/stream.py +++ b/synapse/storage/stream.py @@ -16,8 +16,9 @@ from twisted.internet import defer from ._base import SQLBaseStore - +from synapse.api.errors import SynapseError from synapse.api.constants import Membership +from synapse.util.logutils import log_function import json import logging @@ -29,9 +30,96 @@ logger = logging.getLogger(__name__) MAX_STREAM_SIZE = 1000 +_STREAM_TOKEN = "stream" +_TOPOLOGICAL_TOKEN = "topological" + + +def _parse_stream_token(string): + try: + if string[0] != 's': + raise + return int(string[1:]) + except: + logger.debug("Not stream token: %s", string) + raise SynapseError(400, "Invalid token") + + +def _parse_topological_token(string): + try: + if string[0] != 't': + raise + parts = string[1:].split('-', 1) + return (int(parts[0]), int(parts[1])) + except: + logger.debug("Not topological token: %s", string) + raise SynapseError(400, "Invalid token") + + +def is_stream_token(string): + try: + _parse_stream_token(string) + return True + except: + return False + + +def is_topological_token(string): + try: + _parse_topological_token(string) + return True + except: + return False + + +def _get_token_bound(token, comparison): + try: + s = _parse_stream_token(token) + return "%s %s %d" % ("stream_ordering", comparison, s) + except: + pass + + try: + top, stream = _parse_topological_token(token) + return "%s %s %d AND %s %s %d" % ( + "topological_ordering", comparison, top, + "stream_ordering", comparison, stream, + ) + except: + pass + + raise SynapseError(400, "Invalid token") + + class StreamStore(SQLBaseStore): + @log_function + def get_room_events(self, user_id, from_key, to_key, room_id, limit=0, + direction='f', with_feedback=False): + is_events = ( + direction == 'f' + and is_stream_token(from_key) + and to_key and is_stream_token(to_key) + ) + + if is_events: + return self.get_room_events_stream( + user_id=user_id, + from_key=from_key, + to_key=to_key, + room_id=room_id, + limit=limit, + with_feedback=with_feedback, + ) + else: + return self.paginate_room_events( + from_key=from_key, + to_key=to_key, + room_id=room_id, + limit=limit, + with_feedback=with_feedback, + ) @defer.inlineCallbacks + @log_function def get_room_events_stream(self, user_id, from_key, to_key, room_id, limit=0, with_feedback=False): # TODO (erikj): Handle compressed feedback @@ -54,8 +142,8 @@ class StreamStore(SQLBaseStore): limit = MAX_STREAM_SIZE # From and to keys should be integers from ordering. - from_key = int(from_key) - to_key = int(to_key) + from_id = _parse_stream_token(from_key) + to_id = _parse_stream_token(to_key) if from_key == to_key: defer.returnValue(([], to_key)) @@ -65,42 +153,79 @@ class StreamStore(SQLBaseStore): "SELECT * FROM events as e WHERE " "((room_id IN (%(current)s)) OR " "(event_id IN (%(invites)s))) " + "AND e.stream_ordering > ? AND e.stream_ordering < ? " + "ORDER BY stream_ordering ASC LIMIT %(limit)d " ) % { "current": current_room_membership_sql, "invites": invites_sql, + "limit": limit } - # Constraints and ordering depend on direction. - if from_key < to_key: - sql += ( - "AND e.token_ordering > ? AND e.token_ordering < ? " - "ORDER BY token_ordering ASC LIMIT %(limit)d " - ) % {"limit": limit} - else: - sql += ( - "AND e.token_ordering < ? " - "AND e.token_ordering > ? " - "ORDER BY e.token_ordering DESC LIMIT %(limit)d " - ) % {"limit": int(limit)} - rows = yield self._execute_and_decode( sql, - user_id, user_id, Membership.INVITE, from_key, to_key + user_id, user_id, Membership.INVITE, from_id, to_id ) ret = [self._parse_event_from_row(r) for r in rows] if rows: - if from_key < to_key: - key = max([r["token_ordering"] for r in rows]) - else: - key = min([r["token_ordering"] for r in rows]) + key = "s%d" % max([r["stream_ordering"] for r in rows]) else: + # Assume we didn't get anything because there was nothing to get. key = to_key defer.returnValue((ret, key)) @defer.inlineCallbacks + @log_function + def paginate_room_events(self, room_id, from_key, to_key=None, + direction='b', limit=-1, + with_feedback=False): + # TODO (erikj): Handle compressed feedback + + from_comp = '<' if direction =='b' else '>' + to_comp = '>' if direction =='b' else '<' + order = "DESC" if direction == 'b' else "ASC" + + args = [room_id] + + bounds = _get_token_bound(from_key, from_comp) + if to_key: + bounds = "%s AND %s" % (bounds, _get_token_bound(to_key, to_comp)) + + if int(limit) > 0: + args.append(int(limit)) + limit_str = " LIMIT ?" + else: + limit_str = "" + + sql = ( + "SELECT * FROM events " + "WHERE room_id = ? AND %(bounds)s " + "ORDER BY topological_ordering %(order)s, stream_ordering %(order)s %(limit)s " + ) % {"bounds": bounds, "order": order, "limit": limit_str} + + rows = yield self._execute_and_decode( + sql, + *args + ) + + if rows: + topo = rows[-1]["topological_ordering"] + toke = rows[-1]["stream_ordering"] + next_token = "t%s-%s" % (topo, toke) + else: + # TODO (erikj): We should work out what to do here instead. + next_token = to_key if to_key else from_key + + defer.returnValue( + ( + [self._parse_event_from_row(r) for r in rows], + next_token + ) + ) + + @defer.inlineCallbacks def get_recent_events_for_room(self, room_id, limit, with_feedback=False): # TODO (erikj): Handle compressed feedback @@ -108,8 +233,8 @@ class StreamStore(SQLBaseStore): sql = ( "SELECT * FROM events " - "WHERE room_id = ? AND token_ordering <= ? " - "ORDER BY topological_ordering, token_ordering DESC LIMIT ? " + "WHERE room_id = ? AND stream_ordering <= ? " + "ORDER BY topological_ordering, stream_ordering DESC LIMIT ? " ) rows = yield self._execute_and_decode( @@ -121,12 +246,12 @@ class StreamStore(SQLBaseStore): if rows: topo = rows[0]["topological_ordering"] - toke = rows[0]["token_ordering"] + toke = rows[0]["stream_ordering"] start_token = "p%s-%s" % (topo, toke) token = (start_token, end_token) else: - token = ("START", end_token) + token = (end_token, end_token) defer.returnValue( ( @@ -138,11 +263,14 @@ class StreamStore(SQLBaseStore): @defer.inlineCallbacks def get_room_events_max_id(self): res = yield self._execute_and_decode( - "SELECT MAX(token_ordering) as m FROM events" + "SELECT MAX(stream_ordering) as m FROM events" ) - if not res: - defer.returnValue(0) + logger.debug("get_room_events_max_id: %s", res) + + if not res or not res[0] or not res[0]["m"]: + defer.returnValue("s1") return - defer.returnValue(res[0]["m"]) + key = res[0]["m"] + 1 + defer.returnValue("s%d" % (key,)) |