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Add typing info to Notifier (#8058)

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Erik Johnston 2020-08-11 19:40:02 +01:00 committed by GitHub
parent a0f574f3c2
commit a1e9bb9eae
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5 changed files with 91 additions and 52 deletions
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1
changelog.d/8058.misc Normal file
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@ -0,0 +1 @@
Add type hints to `Notifier`.

4
synapse/handlers/events.py
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@ -57,13 +57,10 @@ class EventStreamHandler(BaseHandler):
timeout=0,
as_client_event=True,
affect_presence=True,
only_keys=None,
room_id=None,
is_guest=False,
):
"""Fetches the events stream for a given user.
If `only_keys` is not None, events from keys will be sent down.
"""
if room_id:
@ -93,7 +90,6 @@ class EventStreamHandler(BaseHandler):
auth_user,
pagin_config,
timeout,
only_keys=only_keys,
is_guest=is_guest,
explicit_room_id=room_id,
)

131
synapse/notifier.py
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@ -15,7 +15,17 @@
import logging
from collections import namedtuple
from typing import Callable, Iterable, List, TypeVar
from typing import (
Awaitable,
Callable,
Dict,
Iterable,
List,
Optional,
Set,
Tuple,
TypeVar,
)
from prometheus_client import Counter
@ -24,12 +34,14 @@ from twisted.internet import defer
import synapse.server
from synapse.api.constants import EventTypes, Membership
from synapse.api.errors import AuthError
from synapse.events import EventBase
from synapse.handlers.presence import format_user_presence_state
from synapse.logging.context import PreserveLoggingContext
from synapse.logging.utils import log_function
from synapse.metrics import LaterGauge
from synapse.metrics.background_process_metrics import run_as_background_process
from synapse.types import StreamToken
from synapse.streams.config import PaginationConfig
from synapse.types import Collection, StreamToken, UserID
from synapse.util.async_helpers import ObservableDeferred, timeout_deferred
from synapse.util.metrics import Measure
from synapse.visibility import filter_events_for_client
@ -77,7 +89,13 @@ class _NotifierUserStream(object):
so that it can remove itself from the indexes in the Notifier class.
"""
def __init__(self, user_id, rooms, current_token, time_now_ms):
def __init__(
self,
user_id: str,
rooms: Collection[str],
current_token: StreamToken,
time_now_ms: int,
):
self.user_id = user_id
self.rooms = set(rooms)
self.current_token = current_token
@ -93,13 +111,13 @@ class _NotifierUserStream(object):
with PreserveLoggingContext():
self.notify_deferred = ObservableDeferred(defer.Deferred())
def notify(self, stream_key, stream_id, time_now_ms):
def notify(self, stream_key: str, stream_id: int, time_now_ms: int):
"""Notify any listeners for this user of a new event from an
event source.
Args:
stream_key(str): The stream the event came from.
stream_id(str): The new id for the stream the event came from.
time_now_ms(int): The current time in milliseconds.
stream_key: The stream the event came from.
stream_id: The new id for the stream the event came from.
time_now_ms: The current time in milliseconds.
"""
self.current_token = self.current_token.copy_and_advance(stream_key, stream_id)
self.last_notified_token = self.current_token
@ -112,7 +130,7 @@ class _NotifierUserStream(object):
self.notify_deferred = ObservableDeferred(defer.Deferred())
noify_deferred.callback(self.current_token)
def remove(self, notifier):
def remove(self, notifier: "Notifier"):
""" Remove this listener from all the indexes in the Notifier
it knows about.
"""
@ -123,10 +141,10 @@ class _NotifierUserStream(object):
notifier.user_to_user_stream.pop(self.user_id)
def count_listeners(self):
def count_listeners(self) -> int:
return len(self.notify_deferred.observers())
def new_listener(self, token):
def new_listener(self, token: StreamToken) -> _NotificationListener:
"""Returns a deferred that is resolved when there is a new token
greater than the given token.
@ -159,14 +177,16 @@ class Notifier(object):
UNUSED_STREAM_EXPIRY_MS = 10 * 60 * 1000
def __init__(self, hs: "synapse.server.HomeServer"):
self.user_to_user_stream = {}
self.room_to_user_streams = {}
self.user_to_user_stream = {} # type: Dict[str, _NotifierUserStream]
self.room_to_user_streams = {} # type: Dict[str, Set[_NotifierUserStream]]
self.hs = hs
self.storage = hs.get_storage()
self.event_sources = hs.get_event_sources()
self.store = hs.get_datastore()
self.pending_new_room_events = []
self.pending_new_room_events = (
[]
) # type: List[Tuple[int, EventBase, Collection[str]]]
# Called when there are new things to stream over replication
self.replication_callbacks = [] # type: List[Callable[[], None]]
@ -178,10 +198,9 @@ class Notifier(object):
self.clock = hs.get_clock()
self.appservice_handler = hs.get_application_service_handler()
self.federation_sender = None
if hs.should_send_federation():
self.federation_sender = hs.get_federation_sender()
else:
self.federation_sender = None
self.state_handler = hs.get_state_handler()
@ -193,12 +212,12 @@ class Notifier(object):
# when rendering the metrics page, which is likely once per minute at
# most when scraping it.
def count_listeners():
all_user_streams = set()
all_user_streams = set() # type: Set[_NotifierUserStream]
for x in list(self.room_to_user_streams.values()):
all_user_streams |= x
for x in list(self.user_to_user_stream.values()):
all_user_streams.add(x)
for streams in list(self.room_to_user_streams.values()):
all_user_streams |= streams
for stream in list(self.user_to_user_stream.values()):
all_user_streams.add(stream)
return sum(stream.count_listeners() for stream in all_user_streams)
@ -223,7 +242,11 @@ class Notifier(object):
self.replication_callbacks.append(cb)
def on_new_room_event(
self, event, room_stream_id, max_room_stream_id, extra_users=[]
self,
event: EventBase,
room_stream_id: int,
max_room_stream_id: int,
extra_users: Collection[str] = [],
):
""" Used by handlers to inform the notifier something has happened
in the room, room event wise.
@ -241,11 +264,11 @@ class Notifier(object):
self.notify_replication()
def _notify_pending_new_room_events(self, max_room_stream_id):
def _notify_pending_new_room_events(self, max_room_stream_id: int):
"""Notify for the room events that were queued waiting for a previous
event to be persisted.
Args:
max_room_stream_id(int): The highest stream_id below which all
max_room_stream_id: The highest stream_id below which all
events have been persisted.
"""
pending = self.pending_new_room_events
@ -258,7 +281,9 @@ class Notifier(object):
else:
self._on_new_room_event(event, room_stream_id, extra_users)
def _on_new_room_event(self, event, room_stream_id, extra_users=[]):
def _on_new_room_event(
self, event: EventBase, room_stream_id: int, extra_users: Collection[str] = []
):
"""Notify any user streams that are interested in this room event"""
# poke any interested application service.
run_as_background_process(
@ -275,13 +300,19 @@ class Notifier(object):
"room_key", room_stream_id, users=extra_users, rooms=[event.room_id]
)
async def _notify_app_services(self, room_stream_id):
async def _notify_app_services(self, room_stream_id: int):
try:
await self.appservice_handler.notify_interested_services(room_stream_id)
except Exception:
logger.exception("Error notifying application services of event")
def on_new_event(self, stream_key, new_token, users=[], rooms=[]):
def on_new_event(
self,
stream_key: str,
new_token: int,
users: Collection[str] = [],
rooms: Collection[str] = [],
):
""" Used to inform listeners that something has happened event wise.
Will wake up all listeners for the given users and rooms.
@ -307,14 +338,19 @@ class Notifier(object):
self.notify_replication()
def on_new_replication_data(self):
def on_new_replication_data(self) -> None:
"""Used to inform replication listeners that something has happend
without waking up any of the normal user event streams"""
self.notify_replication()
async def wait_for_events(
self, user_id, timeout, callback, room_ids=None, from_token=StreamToken.START
):
self,
user_id: str,
timeout: int,
callback: Callable[[StreamToken, StreamToken], Awaitable[T]],
room_ids=None,
from_token=StreamToken.START,
) -> T:
"""Wait until the callback returns a non empty response or the
timeout fires.
"""
@ -377,19 +413,16 @@ class Notifier(object):
async def get_events_for(
self,
user,
pagination_config,
timeout,
only_keys=None,
is_guest=False,
explicit_room_id=None,
):
user: UserID,
pagination_config: PaginationConfig,
timeout: int,
is_guest: bool = False,
explicit_room_id: str = None,
) -> EventStreamResult:
""" 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
new events to happen before returning.
If `only_keys` is not None, events from keys will be sent down.
If explicit_room_id is not set, the user's joined rooms will be polled
for events.
If explicit_room_id is set, that room will be polled for events only if
@ -404,11 +437,13 @@ class Notifier(object):
room_ids, is_joined = await self._get_room_ids(user, explicit_room_id)
is_peeking = not is_joined
async def check_for_updates(before_token, after_token):
async def check_for_updates(
before_token: StreamToken, after_token: StreamToken
) -> EventStreamResult:
if not after_token.is_after(before_token):
return EventStreamResult([], (from_token, from_token))
events = []
events = [] # type: List[EventBase]
end_token = from_token
for name, source in self.event_sources.sources.items():
@ -417,8 +452,6 @@ class Notifier(object):
after_id = getattr(after_token, keyname)
if before_id == after_id:
continue
if only_keys and name not in only_keys:
continue
new_events, new_key = await source.get_new_events(
user=user,
@ -476,7 +509,9 @@ class Notifier(object):
return result
async def _get_room_ids(self, user, explicit_room_id):
async def _get_room_ids(
self, user: UserID, explicit_room_id: Optional[str]
) -> Tuple[Collection[str], bool]:
joined_room_ids = await self.store.get_rooms_for_user(user.to_string())
if explicit_room_id:
if explicit_room_id in joined_room_ids:
@ -486,7 +521,7 @@ class Notifier(object):
raise AuthError(403, "Non-joined access not allowed")
return joined_room_ids, True
async def _is_world_readable(self, room_id):
async def _is_world_readable(self, room_id: str) -> bool:
state = await self.state_handler.get_current_state(
room_id, EventTypes.RoomHistoryVisibility, ""
)
@ -496,7 +531,7 @@ class Notifier(object):
return False
@log_function
def remove_expired_streams(self):
def remove_expired_streams(self) -> None:
time_now_ms = self.clock.time_msec()
expired_streams = []
expire_before_ts = time_now_ms - self.UNUSED_STREAM_EXPIRY_MS
@ -510,21 +545,21 @@ class Notifier(object):
expired_stream.remove(self)
@log_function
def _register_with_keys(self, user_stream):
def _register_with_keys(self, user_stream: _NotifierUserStream):
self.user_to_user_stream[user_stream.user_id] = user_stream
for room in user_stream.rooms:
s = self.room_to_user_streams.setdefault(room, set())
s.add(user_stream)
def _user_joined_room(self, user_id, room_id):
def _user_joined_room(self, user_id: str, room_id: str):
new_user_stream = self.user_to_user_stream.get(user_id)
if new_user_stream is not None:
room_streams = self.room_to_user_streams.setdefault(room_id, set())
room_streams.add(new_user_stream)
new_user_stream.rooms.add(room_id)
def notify_replication(self):
def notify_replication(self) -> None:
"""Notify the any replication listeners that there's a new event"""
for cb in self.replication_callbacks:
cb()

6
synapse/server.pyi
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@ -31,8 +31,10 @@ import synapse.server_notices.server_notices_sender
import synapse.state
import synapse.storage
from synapse.events.builder import EventBuilderFactory
from synapse.handlers.appservice import ApplicationServicesHandler
from synapse.handlers.typing import FollowerTypingHandler
from synapse.replication.tcp.streams import Stream
from synapse.streams.events import EventSources
class HomeServer(object):
@property
@ -153,3 +155,7 @@ class HomeServer(object):
pass
def get_typing_handler(self) -> FollowerTypingHandler:
pass
def get_event_sources(self) -> EventSources:
pass
def get_application_service_handler(self):
return ApplicationServicesHandler(self)

1
tox.ini
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@ -198,6 +198,7 @@ commands = mypy \
synapse/logging/ \
synapse/metrics \
synapse/module_api \
synapse/notifier.py \
synapse/push/pusherpool.py \
synapse/push/push_rule_evaluator.py \
synapse/replication \