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Split paginate_room_events storage function

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This commit is contained in:
Erik Johnston 2018-05-08 15:45:38 +01:00
parent 966686c845
commit 06c0d0ed08
1 changed files with 72 additions and 28 deletions
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68
synapse/storage/stream.py
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@ -738,17 +738,28 @@ class StreamWorkerStore(EventsWorkerStore, SQLBaseStore):
def has_room_changed_since(self, room_id, stream_id):
return self._events_stream_cache.has_entity_changed(room_id, stream_id)
class StreamStore(StreamWorkerStore):
def get_room_max_stream_ordering(self):
return self._stream_id_gen.get_current_token()
def get_room_min_stream_ordering(self):
return self._backfill_id_gen.get_current_token()
@defer.inlineCallbacks
def paginate_room_events(self, room_id, from_key, to_key=None,
def paginate_room_events_txn(self, txn, room_id, from_key, to_key=None,
direction='b', limit=-1, event_filter=None):
"""Returns list of events before or after a given token.
Args:
txn
room_id (str)
from_key (str): The token used to stream from
to_key (str|None): A token which if given limits the results to
only those before
direction(char): Either 'b' or 'f' to indicate whether we are
paginating forwards or backwards from `from_key`.
limit (int): The maximum number of events to return. Zero or less
means no limit.
event_filter (Filter|None): If provided filters the events to
those that match the filter.
Returns:
tuple[list[dict], str]: Returns the results as a list of dicts and
a token that points to the end of the result set. The dicts have
the keys "event_id", "toplogical_ordering" and "stream_orderign".
"""
# Tokens really represent positions between elements, but we use
# the convention of pointing to the event before the gap. Hence
# we have a bit of asymmetry when it comes to equalities.
@ -795,7 +806,6 @@ class StreamStore(StreamWorkerStore):
"limit": limit_str
}
def f(txn):
txn.execute(sql, args)
rows = self.cursor_to_dict(txn)
@ -817,7 +827,33 @@ class StreamStore(StreamWorkerStore):
return rows, next_token,
rows, token = yield self.runInteraction("paginate_room_events", f)
@defer.inlineCallbacks
def paginate_room_events(self, room_id, from_key, to_key=None,
direction='b', limit=-1, event_filter=None):
"""Returns list of events before or after a given token.
Args:
room_id (str)
from_key (str): The token used to stream from
to_key (str|None): A token which if given limits the results to
only those before
direction(char): Either 'b' or 'f' to indicate whether we are
paginating forwards or backwards from `from_key`.
limit (int): The maximum number of events to return. Zero or less
means no limit.
event_filter (Filter|None): If provided filters the events to
those that match the filter.
Returns:
tuple[list[dict], str]: Returns the results as a list of dicts and
a token that points to the end of the result set. The dicts have
the keys "event_id", "toplogical_ordering" and "stream_orderign".
"""
rows, token = yield self.runInteraction(
"paginate_room_events", self.paginate_room_events_txn,
room_id, from_key, to_key, direction, limit, event_filter,
)
events = yield self._get_events(
[r["event_id"] for r in rows],
@ -827,3 +863,11 @@ class StreamStore(StreamWorkerStore):
self._set_before_and_after(events, rows)
defer.returnValue((events, token))
class StreamStore(StreamWorkerStore):
def get_room_max_stream_ordering(self):
return self._stream_id_gen.get_current_token()
def get_room_min_stream_ordering(self):
return self._backfill_id_gen.get_current_token()