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80 lines
2.5 KiB
Python
80 lines
2.5 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from twisted.internet import defer
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from synapse.types import StreamToken
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from synapse.handlers.presence import PresenceEventSource
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from synapse.handlers.room import RoomEventSource
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from synapse.handlers.typing import TypingNotificationEventSource
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class NullSource(object):
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"""This event source never yields any events and its token remains at
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zero. It may be useful for unit-testing."""
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def __init__(self, hs):
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pass
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def get_new_events_for_user(self, user, from_key, limit):
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return defer.succeed(([], from_key))
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def get_current_key(self):
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return defer.succeed(0)
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def get_pagination_rows(self, user, pagination_config, key):
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return defer.succeed(([], pagination_config.from_token))
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class EventSources(object):
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SOURCE_TYPES = {
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"room": RoomEventSource,
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"presence": PresenceEventSource,
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"typing": TypingNotificationEventSource,
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}
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def __init__(self, hs):
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self.sources = {
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name: cls(hs)
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for name, cls in EventSources.SOURCE_TYPES.items()
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}
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@defer.inlineCallbacks
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def get_current_token(self):
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token = StreamToken(
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room_key=(
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yield self.sources["room"].get_current_key()
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),
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presence_key=(
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yield self.sources["presence"].get_current_key()
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),
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typing_key=(
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yield self.sources["typing"].get_current_key()
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)
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)
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defer.returnValue(token)
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class StreamSource(object):
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def get_new_events_for_user(self, user, from_key, limit):
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"""from_key is the key within this event source."""
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raise NotImplementedError("get_new_events_for_user")
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def get_current_key(self):
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raise NotImplementedError("get_current_key")
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def get_pagination_rows(self, user, pagination_config, key):
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raise NotImplementedError("get_rows")
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