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- # Copyright 2014-2016 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 typing import TYPE_CHECKING, Iterator, Tuple
- import attr
- from synapse.handlers.account_data import AccountDataEventSource
- from synapse.handlers.presence import PresenceEventSource
- from synapse.handlers.receipts import ReceiptEventSource
- from synapse.handlers.room import RoomEventSource
- from synapse.handlers.typing import TypingNotificationEventSource
- from synapse.logging.opentracing import trace
- from synapse.streams import EventSource
- from synapse.types import StreamToken
- if TYPE_CHECKING:
- from synapse.server import HomeServer
- @attr.s(frozen=True, slots=True, auto_attribs=True)
- class _EventSourcesInner:
- room: RoomEventSource
- presence: PresenceEventSource
- typing: TypingNotificationEventSource
- receipt: ReceiptEventSource
- account_data: AccountDataEventSource
- def get_sources(self) -> Iterator[Tuple[str, EventSource]]:
- for attribute in attr.fields(_EventSourcesInner):
- yield attribute.name, getattr(self, attribute.name)
- class EventSources:
- def __init__(self, hs: "HomeServer"):
- self.sources = _EventSourcesInner(
- # mypy previously warned that attribute.type is `Optional`, but we know it's
- # never `None` here since all the attributes of `_EventSourcesInner` are
- # annotated.
- # As of the stubs in attrs 22.1.0, `attr.fields()` now returns Any,
- # so the call to `attribute.type` is not checked.
- *(attribute.type(hs) for attribute in attr.fields(_EventSourcesInner))
- )
- self.store = hs.get_datastores().main
- def get_current_token(self) -> StreamToken:
- push_rules_key = self.store.get_max_push_rules_stream_id()
- to_device_key = self.store.get_to_device_stream_token()
- device_list_key = self.store.get_device_stream_token()
- token = StreamToken(
- room_key=self.sources.room.get_current_key(),
- presence_key=self.sources.presence.get_current_key(),
- typing_key=self.sources.typing.get_current_key(),
- receipt_key=self.sources.receipt.get_current_key(),
- account_data_key=self.sources.account_data.get_current_key(),
- push_rules_key=push_rules_key,
- to_device_key=to_device_key,
- device_list_key=device_list_key,
- # Groups key is unused.
- groups_key=0,
- )
- return token
- @trace
- async def get_start_token_for_pagination(self, room_id: str) -> StreamToken:
- """Get the start token for a given room to be used to paginate
- events.
- The returned token does not have the current values for fields other
- than `room`, since they are not used during pagination.
- Returns:
- The start token for pagination.
- """
- return StreamToken.START
- @trace
- async def get_current_token_for_pagination(self, room_id: str) -> StreamToken:
- """Get the current token for a given room to be used to paginate
- events.
- The returned token does not have the current values for fields other
- than `room`, since they are not used during pagination.
- Returns:
- The current token for pagination.
- """
- token = StreamToken(
- room_key=await self.sources.room.get_current_key_for_room(room_id),
- presence_key=0,
- typing_key=0,
- receipt_key=0,
- account_data_key=0,
- push_rules_key=0,
- to_device_key=0,
- device_list_key=0,
- groups_key=0,
- )
- return token
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