diff options
Diffstat (limited to 'synapse/streams')
| -rw-r--r-- | synapse/streams/__init__.py | 14 | ||||
| -rw-r--r-- | synapse/streams/config.py | 84 | ||||
| -rw-r--r-- | synapse/streams/events.py | 180 |
3 files changed, 278 insertions, 0 deletions
diff --git a/synapse/streams/__init__.py b/synapse/streams/__init__.py new file mode 100644 index 0000000000..fe8a073cd3 --- /dev/null +++ b/synapse/streams/__init__.py @@ -0,0 +1,14 @@ +# -*- coding: utf-8 -*- +# Copyright 2014 matrix.org +# +# 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. diff --git a/synapse/streams/config.py b/synapse/streams/config.py new file mode 100644 index 0000000000..2434844d80 --- /dev/null +++ b/synapse/streams/config.py @@ -0,0 +1,84 @@ +# -*- coding: utf-8 -*- +# Copyright 2014 matrix.org +# +# 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 synapse.api.errors import SynapseError +from synapse.types import StreamToken + +import logging + + +logger = logging.getLogger(__name__) + + +class PaginationConfig(object): + + """A configuration object which stores pagination parameters.""" + + def __init__(self, from_token=None, to_token=None, direction='f', + limit=0): + self.from_token = from_token + self.to_token = to_token + self.direction = 'f' if direction == 'f' else 'b' + self.limit = int(limit) + + @classmethod + def from_request(cls, request, raise_invalid_params=True): + def get_param(name, default=None): + lst = request.args.get(name, []) + if len(lst) > 1: + raise SynapseError( + 400, "%s must be specified only once" % (name,) + ) + elif len(lst) == 1: + return lst[0] + else: + return default + + direction = get_param("dir", 'f') + if direction not in ['f', 'b']: + raise SynapseError(400, "'dir' parameter is invalid.") + + from_tok = get_param("from") + to_tok = get_param("to") + + try: + if from_tok == "END": + from_tok = None # For backwards compat. + elif from_tok: + from_tok = StreamToken.from_string(from_tok) + except: + raise SynapseError(400, "'from' paramater is invalid") + + try: + if to_tok: + to_tok = StreamToken.from_string(to_tok) + except: + raise SynapseError(400, "'to' paramater is invalid") + + limit = get_param("limit", "0") + if not limit.isdigit(): + raise SynapseError(400, "'limit' parameter must be an integer.") + + try: + return PaginationConfig(from_tok, to_tok, direction, limit) + except: + logger.exception("Failed to create pagination config") + raise SynapseError(400, "Invalid request.") + + def __str__(self): + return ( + "<PaginationConfig from_tok=%s, to_tok=%s, " + "direction=%s, limit=%s>" + ) % (self.from_tok, self.to_tok, self.direction, self.limit) diff --git a/synapse/streams/events.py b/synapse/streams/events.py new file mode 100644 index 0000000000..2e6ea6ca26 --- /dev/null +++ b/synapse/streams/events.py @@ -0,0 +1,180 @@ +# -*- coding: utf-8 -*- +# Copyright 2014 matrix.org +# +# 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.api.constants import Membership +from synapse.types import StreamToken + + +class RoomEventSource(object): + def __init__(self, hs): + self.store = hs.get_datastore() + + @defer.inlineCallbacks + def get_new_events_for_user(self, user, from_token, limit): + # We just ignore the key for now. + + to_key = yield self.get_current_token_part() + + events, end_key = yield self.store.get_room_events_stream( + user_id=user.to_string(), + from_key=from_token.events_key, + to_key=to_key, + room_id=None, + limit=limit, + ) + + end_token = from_token.copy_and_replace("events_key", end_key) + + defer.returnValue((events, end_token)) + + def get_current_token_part(self): + return self.store.get_room_events_max_id() + + @defer.inlineCallbacks + def get_pagination_rows(self, user, pagination_config, key): + from_token = pagination_config.from_token + to_token = pagination_config.to_token + limit = pagination_config.limit + direction = pagination_config.direction + + to_key = to_token.events_key if to_token else None + + events, next_key = yield self.store.paginate_room_events( + room_id=key, + from_key=from_token.events_key, + to_key=to_key, + direction=direction, + limit=limit, + with_feedback=True + ) + + next_token = from_token.copy_and_replace("events_key", next_key) + + defer.returnValue((events, next_token)) + + +class PresenceSource(object): + def __init__(self, hs): + self.hs = hs + self.clock = hs.get_clock() + + def get_new_events_for_user(self, user, from_token, limit): + from_key = int(from_token.presence_key) + + presence = self.hs.get_handlers().presence_handler + cachemap = presence._user_cachemap + + # TODO(paul): limit, and filter by visibility + updates = [(k, cachemap[k]) for k in cachemap + if from_key < cachemap[k].serial] + + if updates: + clock = self.clock + + latest_serial = max([x[1].serial for x in updates]) + data = [x[1].make_event(user=x[0], clock=clock) for x in updates] + + end_token = from_token.copy_and_replace( + "presence_key", latest_serial + ) + return ((data, end_token)) + else: + end_token = from_token.copy_and_replace( + "presence_key", presence._user_cachemap_latest_serial + ) + return (([], end_token)) + + def get_current_token_part(self): + presence = self.hs.get_handlers().presence_handler + return presence._user_cachemap_latest_serial + + def get_pagination_rows(self, user, pagination_config, key): + # TODO (erikj): Does this make sense? Ordering? + + from_token = pagination_config.from_token + to_token = pagination_config.to_token + + from_key = int(from_token.presence_key) + + if to_token: + to_key = int(to_token.presence_key) + else: + to_key = -1 + + presence = self.hs.get_handlers().presence_handler + cachemap = presence._user_cachemap + + # TODO(paul): limit, and filter by visibility + updates = [(k, cachemap[k]) for k in cachemap + if to_key < cachemap[k].serial < from_key] + + if updates: + clock = self.clock + + earliest_serial = max([x[1].serial for x in updates]) + data = [x[1].make_event(user=x[0], clock=clock) for x in updates] + + if to_token: + next_token = to_token + else: + next_token = from_token + + next_token = next_token.copy_and_replace( + "presence_key", earliest_serial + ) + return ((data, next_token)) + else: + if not to_token: + to_token = from_token.copy_and_replace( + "presence_key", 0 + ) + return (([], to_token)) + + +class EventSources(object): + SOURCE_TYPES = { + "room": RoomEventSource, + "presence": PresenceSource, + } + + def __init__(self, hs): + self.sources = { + name: cls(hs) + for name, cls in EventSources.SOURCE_TYPES.items() + } + + @staticmethod + def create_token(events_key, presence_key): + return StreamToken(events_key=events_key, presence_key=presence_key) + + @defer.inlineCallbacks + def get_current_token(self): + events_key = yield self.sources["room"].get_current_token_part() + presence_key = yield self.sources["presence"].get_current_token_part() + token = EventSources.create_token(events_key, presence_key) + defer.returnValue(token) + + +class StreamSource(object): + def get_new_events_for_user(self, user, from_token, limit): + raise NotImplementedError("get_new_events_for_user") + + def get_current_token_part(self): + raise NotImplementedError("get_current_token_part") + + def get_pagination_rows(self, user, pagination_config, key): + raise NotImplementedError("get_rows") |