diff options
| -rw-r--r-- | synapse/events/utils.py | 85 | ||||
| -rw-r--r-- | synapse/handlers/__init__.py | 2 | ||||
| -rw-r--r-- | synapse/handlers/sync.py | 380 | ||||
| -rw-r--r-- | synapse/notifier.py | 48 | ||||
| -rw-r--r-- | synapse/rest/client/v2_alpha/__init__.py | 4 | ||||
| -rw-r--r-- | synapse/rest/client/v2_alpha/sync.py | 198 | ||||
| -rw-r--r-- | synapse/storage/stream.py | 47 |
7 files changed, 720 insertions, 44 deletions
diff --git a/synapse/events/utils.py b/synapse/events/utils.py index e391aca4cc..21316cc125 100644 --- a/synapse/events/utils.py +++ b/synapse/events/utils.py @@ -89,7 +89,47 @@ def prune_event(event): return type(event)(allowed_fields) -def serialize_event(e, time_now_ms, client_event=True): +def format_event_raw(d): + return d + + +def format_event_for_client_v1(d): + d["user_id"] = d.pop("sender", None) + + move_keys = ("age", "redacted_because", "replaces_state", "prev_content") + for key in move_keys: + if key in d["unsigned"]: + d[key] = d["unsigned"][key] + + drop_keys = ( + "auth_events", "prev_events", "hashes", "signatures", "depth", + "unsigned", "origin", "prev_state" + ) + for key in drop_keys: + d.pop(key, None) + return d + + +def format_event_for_client_v2(d): + drop_keys = ( + "auth_events", "prev_events", "hashes", "signatures", "depth", + "origin", "prev_state", + ) + for key in drop_keys: + d.pop(key, None) + return d + + +def format_event_for_client_v2_without_event_id(d): + d = format_event_for_client_v2(d) + d.pop("room_id", None) + d.pop("event_id", None) + return d + + +def serialize_event(e, time_now_ms, as_client_event=True, + event_format=format_event_for_client_v1, + token_id=None): # FIXME(erikj): To handle the case of presence events and the like if not isinstance(e, EventBase): return e @@ -99,43 +139,22 @@ def serialize_event(e, time_now_ms, client_event=True): # Should this strip out None's? d = {k: v for k, v in e.get_dict().items()} - if not client_event: - # set the age and keep all other keys - if "age_ts" in d["unsigned"]: - d["unsigned"]["age"] = time_now_ms - d["unsigned"]["age_ts"] - return d - if "age_ts" in d["unsigned"]: - d["age"] = time_now_ms - d["unsigned"]["age_ts"] + d["unsigned"]["age"] = time_now_ms - d["unsigned"]["age_ts"] del d["unsigned"]["age_ts"] - d["user_id"] = d.pop("sender", None) - if "redacted_because" in e.unsigned: - d["redacted_because"] = serialize_event( + d["unsigned"]["redacted_because"] = serialize_event( e.unsigned["redacted_because"], time_now_ms ) - del d["unsigned"]["redacted_because"] + if token_id is not None: + if token_id == getattr(e.internal_metadata, "token_id", None): + txn_id = getattr(e.internal_metadata, "txn_id", None) + if txn_id is not None: + d["unsigned"]["transaction_id"] = txn_id - if "redacted_by" in e.unsigned: - d["redacted_by"] = e.unsigned["redacted_by"] - del d["unsigned"]["redacted_by"] - - if "replaces_state" in e.unsigned: - d["replaces_state"] = e.unsigned["replaces_state"] - del d["unsigned"]["replaces_state"] - - if "prev_content" in e.unsigned: - d["prev_content"] = e.unsigned["prev_content"] - del d["unsigned"]["prev_content"] - - del d["auth_events"] - del d["prev_events"] - del d["hashes"] - del d["signatures"] - d.pop("depth", None) - d.pop("unsigned", None) - d.pop("origin", None) - - return d + if as_client_event: + return event_format(d) + else: + return d diff --git a/synapse/handlers/__init__.py b/synapse/handlers/__init__.py index fe071a4bc2..a32eab9316 100644 --- a/synapse/handlers/__init__.py +++ b/synapse/handlers/__init__.py @@ -26,6 +26,7 @@ from .presence import PresenceHandler from .directory import DirectoryHandler from .typing import TypingNotificationHandler from .admin import AdminHandler +from .sync import SyncHandler class Handlers(object): @@ -51,3 +52,4 @@ class Handlers(object): self.directory_handler = DirectoryHandler(hs) self.typing_notification_handler = TypingNotificationHandler(hs) self.admin_handler = AdminHandler(hs) + self.sync_handler = SyncHandler(hs) diff --git a/synapse/handlers/sync.py b/synapse/handlers/sync.py new file mode 100644 index 0000000000..8c7681a48d --- /dev/null +++ b/synapse/handlers/sync.py @@ -0,0 +1,380 @@ +# -*- coding: utf-8 -*- +# Copyright 2015 OpenMarket Ltd +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +from ._base import BaseHandler + +from synapse.streams.config import PaginationConfig +from synapse.api.constants import Membership + +from twisted.internet import defer + +import collections +import logging + +logger = logging.getLogger(__name__) + + +SyncConfig = collections.namedtuple("SyncConfig", [ + "user", + "device", + "limit", + "gap", + "sort", + "backfill", + "filter", +]) + + +class RoomSyncResult(collections.namedtuple("RoomSyncResult", [ + "room_id", + "limited", + "published", + "events", + "state", + "prev_batch", + "ephemeral", +])): + __slots__ = [] + + def __nonzero__(self): + return bool(self.events or self.state or self.ephemeral) + + +class SyncResult(collections.namedtuple("SyncResult", [ + "next_batch", # Token for the next sync + "private_user_data", # List of private events for the user. + "public_user_data", # List of public events for all users. + "rooms", # RoomSyncResult for each room. +])): + __slots__ = [] + + def __nonzero__(self): + return bool( + self.private_user_data or self.public_user_data or self.rooms + ) + + +class SyncHandler(BaseHandler): + + def __init__(self, hs): + super(SyncHandler, self).__init__(hs) + self.event_sources = hs.get_event_sources() + self.clock = hs.get_clock() + + @defer.inlineCallbacks + def wait_for_sync_for_user(self, sync_config, since_token=None, timeout=0): + """Get the sync for a client if we have new data for it now. Otherwise + wait for new data to arrive on the server. If the timeout expires, then + return an empty sync result. + Returns: + A Deferred SyncResult. + """ + if timeout == 0 or since_token is None: + result = yield self.current_sync_for_user(sync_config, since_token) + defer.returnValue(result) + else: + def current_sync_callback(): + return self.current_sync_for_user(sync_config, since_token) + + rm_handler = self.hs.get_handlers().room_member_handler + room_ids = yield rm_handler.get_rooms_for_user(sync_config.user) + result = yield self.notifier.wait_for_events( + sync_config.user, room_ids, + sync_config.filter, timeout, current_sync_callback + ) + defer.returnValue(result) + + def current_sync_for_user(self, sync_config, since_token=None): + """Get the sync for client needed to match what the server has now. + Returns: + A Deferred SyncResult. + """ + if since_token is None: + return self.initial_sync(sync_config) + else: + if sync_config.gap: + return self.incremental_sync_with_gap(sync_config, since_token) + else: + #TODO(mjark): Handle gapless sync + pass + + @defer.inlineCallbacks + def initial_sync(self, sync_config): + """Get a sync for a client which is starting without any state + Returns: + A Deferred SyncResult. + """ + if sync_config.sort == "timeline,desc": + # TODO(mjark): Handle going through events in reverse order?. + # What does "most recent events" mean when applying the limits mean + # in this case? + raise NotImplementedError() + + now_token = yield self.event_sources.get_current_token() + + presence_stream = self.event_sources.sources["presence"] + # TODO (mjark): This looks wrong, shouldn't we be getting the presence + # UP to the present rather than after the present? + pagination_config = PaginationConfig(from_token=now_token) + presence, _ = yield presence_stream.get_pagination_rows( + user=sync_config.user, + pagination_config=pagination_config.get_source_config("presence"), + key=None + ) + room_list = yield self.store.get_rooms_for_user_where_membership_is( + user_id=sync_config.user.to_string(), + membership_list=[Membership.INVITE, Membership.JOIN] + ) + + # TODO (mjark): Does public mean "published"? + published_rooms = yield self.store.get_rooms(is_public=True) + published_room_ids = set(r["room_id"] for r in published_rooms) + + rooms = [] + for event in room_list: + room_sync = yield self.initial_sync_for_room( + event.room_id, sync_config, now_token, published_room_ids + ) + rooms.append(room_sync) + + defer.returnValue(SyncResult( + public_user_data=presence, + private_user_data=[], + rooms=rooms, + next_batch=now_token, + )) + + @defer.inlineCallbacks + def initial_sync_for_room(self, room_id, sync_config, now_token, + published_room_ids): + """Sync a room for a client which is starting without any state + Returns: + A Deferred RoomSyncResult. + """ + recent_events, token = yield self.store.get_recent_events_for_room( + room_id, + limit=sync_config.limit, + end_token=now_token.room_key, + ) + prev_batch_token = now_token.copy_and_replace("room_key", token[0]) + current_state_events = yield self.state_handler.get_current_state( + room_id + ) + + defer.returnValue(RoomSyncResult( + room_id=room_id, + published=room_id in published_room_ids, + events=recent_events, + prev_batch=prev_batch_token, + state=current_state_events, + limited=True, + ephemeral=[], + )) + + @defer.inlineCallbacks + def incremental_sync_with_gap(self, sync_config, since_token): + """ Get the incremental delta needed to bring the client up to + date with the server. + Returns: + A Deferred SyncResult. + """ + if sync_config.sort == "timeline,desc": + # TODO(mjark): Handle going through events in reverse order?. + # What does "most recent events" mean when applying the limits mean + # in this case? + raise NotImplementedError() + + now_token = yield self.event_sources.get_current_token() + + presence_source = self.event_sources.sources["presence"] + presence, presence_key = yield presence_source.get_new_events_for_user( + user=sync_config.user, + from_key=since_token.presence_key, + limit=sync_config.limit, + ) + now_token = now_token.copy_and_replace("presence_key", presence_key) + + typing_source = self.event_sources.sources["typing"] + typing, typing_key = yield typing_source.get_new_events_for_user( + user=sync_config.user, + from_key=since_token.typing_key, + limit=sync_config.limit, + ) + now_token = now_token.copy_and_replace("typing_key", typing_key) + + typing_by_room = {event["room_id"]: [event] for event in typing} + for event in typing: + event.pop("room_id") + logger.debug("Typing %r", typing_by_room) + + rm_handler = self.hs.get_handlers().room_member_handler + room_ids = yield rm_handler.get_rooms_for_user(sync_config.user) + + # TODO (mjark): Does public mean "published"? + published_rooms = yield self.store.get_rooms(is_public=True) + published_room_ids = set(r["room_id"] for r in published_rooms) + + room_events, _ = yield self.store.get_room_events_stream( + sync_config.user.to_string(), + from_key=since_token.room_key, + to_key=now_token.room_key, + room_id=None, + limit=sync_config.limit + 1, + ) + + rooms = [] + if len(room_events) <= sync_config.limit: + # There is no gap in any of the rooms. Therefore we can just + # partition the new events by room and return them. + events_by_room_id = {} + for event in room_events: + events_by_room_id.setdefault(event.room_id, []).append(event) + + for room_id in room_ids: + recents = events_by_room_id.get(room_id, []) + state = [event for event in recents if event.is_state()] + if recents: + prev_batch = now_token.copy_and_replace( + "room_key", recents[0].internal_metadata.before + ) + else: + prev_batch = now_token + room_sync = RoomSyncResult( + room_id=room_id, + published=room_id in published_room_ids, + events=recents, + prev_batch=prev_batch, + state=state, + limited=False, + ephemeral=typing_by_room.get(room_id, []) + ) + if room_sync: + rooms.append(room_sync) + else: + for room_id in room_ids: + room_sync = yield self.incremental_sync_with_gap_for_room( + room_id, sync_config, since_token, now_token, + published_room_ids, typing_by_room + ) + if room_sync: + rooms.append(room_sync) + + defer.returnValue(SyncResult( + public_user_data=presence, + private_user_data=[], + rooms=rooms, + next_batch=now_token, + )) + + @defer.inlineCallbacks + def incremental_sync_with_gap_for_room(self, room_id, sync_config, + since_token, now_token, + published_room_ids, typing_by_room): + """ Get the incremental delta needed to bring the client up to date for + the room. Gives the client the most recent events and the changes to + state. + Returns: + A Deferred RoomSyncResult + """ + # TODO(mjark): Check if they have joined the room between + # the previous sync and this one. + # TODO(mjark): Apply the event filter in sync_config + # TODO(mjark): Check for redactions we might have missed. + recents, token = yield self.store.get_recent_events_for_room( + room_id, + limit=sync_config.limit + 1, + from_token=since_token.room_key, + end_token=now_token.room_key, + ) + + logging.debug("Recents %r", recents) + + if len(recents) > sync_config.limit: + limited = True + recents = recents[1:] + else: + limited = False + + prev_batch_token = now_token.copy_and_replace("room_key", token[0]) + + # TODO(mjark): This seems racy since this isn't being passed a + # token to indicate what point in the stream this is + current_state_events = yield self.state_handler.get_current_state( + room_id + ) + + state_at_previous_sync = yield self.get_state_at_previous_sync( + room_id, since_token=since_token + ) + + state_events_delta = yield self.compute_state_delta( + since_token=since_token, + previous_state=state_at_previous_sync, + current_state=current_state_events, + ) + + room_sync = RoomSyncResult( + room_id=room_id, + published=room_id in published_room_ids, + events=recents, + prev_batch=prev_batch_token, + state=state_events_delta, + limited=limited, + typing=typing_by_room.get(room_id, None) + ) + + logging.debug("Room sync: %r", room_sync) + + defer.returnValue(room_sync) + + @defer.inlineCallbacks + def get_state_at_previous_sync(self, room_id, since_token): + """ Get the room state at the previous sync the client made. + Returns: + A Deferred list of Events. + """ + last_events, token = yield self.store.get_recent_events_for_room( + room_id, end_token=since_token.room_key, limit=1, + ) + + if last_events: + last_event = last_events[0] + last_context = yield self.state_handler.compute_event_context( + last_event + ) + if last_event.is_state(): + state = [last_event] + last_context.current_state.values() + else: + state = last_context.current_state.values() + else: + state = () + defer.returnValue(state) + + def compute_state_delta(self, since_token, previous_state, current_state): + """ Works out the differnce in state between the current state and the + state the client got when it last performed a sync. + Returns: + A list of events. + """ + # TODO(mjark) Check if the state events were received by the server + # after the previous sync, since we need to include those state + # updates even if they occured logically before the previous event. + # TODO(mjark) Check for new redactions in the state events. + previous_dict = {event.event_id: event for event in previous_state} + state_delta = [] + for event in current_state: + if event.event_id not in previous_dict: + state_delta.append(event) + return state_delta diff --git a/synapse/notifier.py b/synapse/notifier.py index 3aec1d4af2..e3b6ead620 100644 --- a/synapse/notifier.py +++ b/synapse/notifier.py @@ -18,6 +18,7 @@ from twisted.internet import defer from synapse.util.logutils import log_function from synapse.util.logcontext import PreserveLoggingContext from synapse.util.async import run_on_reactor +from synapse.types import StreamToken import logging @@ -205,6 +206,53 @@ class Notifier(object): [notify(l).addErrback(eb) for l in listeners] ) + @defer.inlineCallbacks + def wait_for_events(self, user, rooms, filter, timeout, callback): + """Wait until the callback returns a non empty response or the + timeout fires. + """ + + deferred = defer.Deferred() + + from_token = StreamToken("s0", "0", "0") + + listener = [_NotificationListener( + user=user, + rooms=rooms, + from_token=from_token, + limit=1, + timeout=timeout, + deferred=deferred, + )] + + if timeout: + self._register_with_keys(listener[0]) + + result = yield callback() + if timeout: + timed_out = [False] + + def _timeout_listener(): + timed_out[0] = True + listener[0].notify(self, [], from_token, from_token) + + self.clock.call_later(timeout/1000., _timeout_listener) + while not result and not timed_out[0]: + yield deferred + deferred = defer.Deferred() + listener[0] = _NotificationListener( + user=user, + rooms=rooms, + from_token=from_token, + limit=1, + timeout=timeout, + deferred=deferred, + ) + self._register_with_keys(listener[0]) + result = yield callback() + + defer.returnValue(result) + def get_events_for(self, user, rooms, pagination_config, timeout): """ For the given user and rooms, return any new events for them. If there are no new events wait for up to `timeout` milliseconds for any diff --git a/synapse/rest/client/v2_alpha/__init__.py b/synapse/rest/client/v2_alpha/__init__.py index 4349579ab7..8f611de3a8 100644 --- a/synapse/rest/client/v2_alpha/__init__.py +++ b/synapse/rest/client/v2_alpha/__init__.py @@ -13,12 +13,11 @@ # See the License for the specific language governing permissions and # limitations under the License. - from . import ( + sync, filter ) - from synapse.http.server import JsonResource @@ -31,4 +30,5 @@ class ClientV2AlphaRestResource(JsonResource): @staticmethod def register_servlets(client_resource, hs): + sync.register_servlets(hs, client_resource) filter.register_servlets(hs, client_resource) diff --git a/synapse/rest/client/v2_alpha/sync.py b/synapse/rest/client/v2_alpha/sync.py new file mode 100644 index 0000000000..2ae2eec55d --- /dev/null +++ b/synapse/rest/client/v2_alpha/sync.py @@ -0,0 +1,198 @@ +# -*- coding: utf-8 -*- +# Copyright 2015 OpenMarket Ltd +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +from twisted.internet import defer + +from synapse.http.servlet import RestServlet +from synapse.handlers.sync import SyncConfig +from synapse.types import StreamToken +from synapse.events.utils import ( + serialize_event, format_event_for_client_v2_without_event_id, +) +from ._base import client_v2_pattern + +import logging + +logger = logging.getLogger(__name__) + + +class SyncRestServlet(RestServlet): + """ + + GET parameters:: + timeout(int): How long to wait for new events in milliseconds. + limit(int): Maxiumum number of events per room to return. + gap(bool): Create gaps the message history if limit is exceeded to + ensure that the client has the most recent messages. Defaults to + "true". + sort(str,str): tuple of sort key (e.g. "timeline") and direction + (e.g. "asc", "desc"). Defaults to "timeline,asc". + since(batch_token): Batch token when asking for incremental deltas. + set_presence(str): What state the device presence should be set to. + default is "online". + backfill(bool): Should the HS request message history from other + servers. This may take a long time making it unsuitable for clients + expecting a prompt response. Defaults to "true". + filter(filter_id): A filter to apply to the events returned. + filter_*: Filter override parameters. + + Response JSON:: + { + "next_batch": // batch token for the next /sync + "private_user_data": // private events for this user. + "public_user_data": // public events for all users including the + // public events for this user. + "rooms": [{ // List of rooms with updates. + "room_id": // Id of the room being updated + "limited": // Was the per-room event limit exceeded? + "published": // Is the room published by our HS? + "event_map": // Map of EventID -> event JSON. + "events": { // The recent events in the room if gap is "true" + // otherwise the next events in the room. + "batch": [] // list of EventIDs in the "event_map". + "prev_batch": // back token for getting previous events. + } + "state": [] // list of EventIDs updating the current state to + // be what it should be at the end of the batch. + "ephemeral": [] + }] + } + """ + + PATTERN = client_v2_pattern("/sync$") + ALLOWED_SORT = set(["timeline,asc", "timeline,desc"]) + ALLOWED_PRESENCE = set(["online", "offline", "idle"]) + + def __init__(self, hs): + super(SyncRestServlet, self).__init__() + self.auth = hs.get_auth() + self.sync_handler = hs.get_handlers().sync_handler + self.clock = hs.get_clock() + + @defer.inlineCallbacks + def on_GET(self, request): + user, client = yield self.auth.get_user_by_req(request) + + timeout = self.parse_integer(request, "timeout", default=0) + limit = self.parse_integer(request, "limit", required=True) + gap = self.parse_boolean(request, "gap", default=True) + sort = self.parse_string( + request, "sort", default="timeline,asc", + allowed_values=self.ALLOWED_SORT + ) + since = self.parse_string(request, "since") + set_presence = self.parse_string( + request, "set_presence", default="online", + allowed_values=self.ALLOWED_PRESENCE + ) + backfill = self.parse_boolean(request, "backfill", default=False) + filter_id = self.parse_string(request, "filter", default=None) + + logger.info( + "/sync: user=%r, timeout=%r, limit=%r, gap=%r, sort=%r, since=%r," + " set_presence=%r, backfill=%r, filter_id=%r" % ( + user, timeout, limit, gap, sort, since, set_presence, + backfill, filter_id + ) + ) + + # TODO(mjark): Load filter and apply overrides. + # filter = self.filters.load_fitler(filter_id_str) + # filter = filter.apply_overrides(http_request) + # if filter.matches(event): + # # stuff + + sync_config = SyncConfig( + user=user, + device="TODO", # TODO(mjark) Get the device_id from access_token + gap=gap, + limit=limit, + sort=sort, + backfill=backfill, + filter="TODO", # TODO(mjark) Add the filter to the config. + ) + + if since is not None: + since_token = StreamToken.from_string(since) + else: + since_token = None + + sync_result = yield self.sync_handler.wait_for_sync_for_user( + sync_config, since_token=since_token, timeout=timeout + ) + + time_now = self.clock.time_msec() + + response_content = { + "public_user_data": self.encode_user_data( + sync_result.public_user_data, filter, time_now + ), + "private_user_data": self.encode_user_data( + sync_result.private_user_data, filter, time_now + ), + "rooms": self.encode_rooms( + sync_result.rooms, filter, time_now, client.token_id + ), + "next_batch": sync_result.next_batch.to_string(), + } + + defer.returnValue((200, response_content)) + + def encode_user_data(self, events, filter, time_now): + return events + + def encode_rooms(self, rooms, filter, time_now, token_id): + return [ + self.encode_room(room, filter, time_now, token_id) + for room in rooms + ] + + @staticmethod + def encode_room(room, filter, time_now, token_id): + event_map = {} + state_event_ids = [] + recent_event_ids = [] + for event in room.state: + # TODO(mjark): Respect formatting requirements in the filter. + event_map[event.event_id] = serialize_event( + event, time_now, token_id=token_id, + event_format=format_event_for_client_v2_without_event_id, + ) + state_event_ids.append(event.event_id) + + for event in room.events: + # TODO(mjark): Respect formatting requirements in the filter. + event_map[event.event_id] = serialize_event( + event, time_now, token_id=token_id, + event_format=format_event_for_client_v2_without_event_id, + ) + recent_event_ids.append(event.event_id) + result = { + "room_id": room.room_id, + "event_map": event_map, + "events": { + "batch": recent_event_ids, + "prev_batch": room.prev_batch.to_string(), + }, + "state": state_event_ids, + "limited": room.limited, + "published": room.published, + "ephemeral": room.ephemeral, + } + return result + + +def register_servlets(hs, http_server): + SyncRestServlet(hs).register(http_server) diff --git a/synapse/storage/stream.py b/synapse/storage/stream.py index 062ca06fb3..2ea5e1a021 100644 --- a/synapse/storage/stream.py +++ b/synapse/storage/stream.py @@ -181,6 +181,13 @@ class StreamStore(SQLBaseStore): get_prev_content=True ) + for event, row in zip(ret, rows): + stream = row["stream_ordering"] + topo = event.depth + internal = event.internal_metadata + internal.before = str(_StreamToken(topo, stream - 1)) + internal.after = str(_StreamToken(topo, stream)) + if rows: key = "s%d" % max([r["stream_ordering"] for r in rows]) else: @@ -265,17 +272,37 @@ class StreamStore(SQLBaseStore): return self.runInteraction("paginate_room_events", f) def get_recent_events_for_room(self, room_id, limit, end_token, - with_feedback=False): + with_feedback=False, from_token=None): # TODO (erikj): Handle compressed feedback - sql = ( - "SELECT stream_ordering, topological_ordering, event_id FROM events " - "WHERE room_id = ? AND stream_ordering <= ? AND outlier = 0 " - "ORDER BY topological_ordering DESC, stream_ordering DESC LIMIT ? " - ) + end_token = _StreamToken.parse_stream_token(end_token) - def f(txn): - txn.execute(sql, (room_id, end_token, limit,)) + if from_token is None: + sql = ( + "SELECT stream_ordering, topological_ordering, event_id" + " FROM events" + " WHERE room_id = ? AND stream_ordering <= ? AND outlier = 0" + " ORDER BY topological_ordering DESC, stream_ordering DESC" + " LIMIT ?" + ) + else: + from_token = _StreamToken.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 = 0" + " 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, limit,)) + else: + txn.execute(sql, ( + room_id, from_token.stream, end_token.stream, limit + )) rows = self.cursor_to_dict(txn) @@ -303,7 +330,9 @@ class StreamStore(SQLBaseStore): return events, token - return self.runInteraction("get_recent_events_for_room", f) + return self.runInteraction( + "get_recent_events_for_room", get_recent_events_for_room_txn + ) def get_room_events_max_id(self): return self.runInteraction( |