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https://github.com/element-hq/synapse
synced 2024-08-18 23:50:52 +00:00
Move storage.stream._StreamToken to types.RoomStreamToken
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parent
d244fa9741
commit
17653a5dfe
2 changed files with 85 additions and 85 deletions
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@ -37,11 +37,9 @@ from twisted.internet import defer
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from ._base import SQLBaseStore
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from synapse.api.constants import EventTypes
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from synapse.api.errors import SynapseError
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from synapse.types import RoomStreamToken
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from synapse.util.logutils import log_function
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from collections import namedtuple
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import logging
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@ -55,76 +53,26 @@ _STREAM_TOKEN = "stream"
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_TOPOLOGICAL_TOKEN = "topological"
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class _StreamToken(namedtuple("_StreamToken", "topological stream")):
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"""Tokens are positions between events. The token "s1" comes after event 1.
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def lower_bound(token):
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if token.topological is None:
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return "(%d < %s)" % (token.stream, "stream_ordering")
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else:
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return "(%d < %s OR (%d = %s AND %d < %s))" % (
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token.topological, "topological_ordering",
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token.topological, "topological_ordering",
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token.stream, "stream_ordering",
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)
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s0 s1
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[0] V [1] V [2]
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Tokens can either be a point in the live event stream or a cursor going
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through historic events.
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When traversing the live event stream events are ordered by when they
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arrived at the homeserver.
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When traversing historic events the events are ordered by their depth in
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the event graph "topological_ordering" and then by when they arrived at the
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homeserver "stream_ordering".
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Live tokens start with an "s" followed by the "stream_ordering" id of the
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event it comes after. Historic tokens start with a "t" followed by the
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"topological_ordering" id of the event it comes after, follewed by "-",
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followed by the "stream_ordering" id of the event it comes after.
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"""
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__slots__ = []
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@classmethod
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def parse(cls, string):
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try:
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if string[0] == 's':
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return cls(topological=None, stream=int(string[1:]))
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if string[0] == 't':
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parts = string[1:].split('-', 1)
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return cls(topological=int(parts[0]), stream=int(parts[1]))
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except:
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pass
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raise SynapseError(400, "Invalid token %r" % (string,))
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@classmethod
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def parse_stream_token(cls, string):
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try:
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if string[0] == 's':
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return cls(topological=None, stream=int(string[1:]))
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except:
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pass
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raise SynapseError(400, "Invalid token %r" % (string,))
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def __str__(self):
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if self.topological is not None:
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return "t%d-%d" % (self.topological, self.stream)
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else:
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return "s%d" % (self.stream,)
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def lower_bound(self):
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if self.topological is None:
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return "(%d < %s)" % (self.stream, "stream_ordering")
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else:
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return "(%d < %s OR (%d = %s AND %d < %s))" % (
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self.topological, "topological_ordering",
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self.topological, "topological_ordering",
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self.stream, "stream_ordering",
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)
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def upper_bound(self):
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if self.topological is None:
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return "(%d >= %s)" % (self.stream, "stream_ordering")
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else:
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return "(%d > %s OR (%d = %s AND %d >= %s))" % (
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self.topological, "topological_ordering",
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self.topological, "topological_ordering",
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self.stream, "stream_ordering",
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)
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def upper_bound(token):
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if token.topological is None:
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return "(%d >= %s)" % (token.stream, "stream_ordering")
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else:
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return "(%d > %s OR (%d = %s AND %d >= %s))" % (
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token.topological, "topological_ordering",
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token.topological, "topological_ordering",
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token.stream, "stream_ordering",
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)
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class StreamStore(SQLBaseStore):
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@ -139,8 +87,8 @@ class StreamStore(SQLBaseStore):
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limit = MAX_STREAM_SIZE
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# From and to keys should be integers from ordering.
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from_id = _StreamToken.parse_stream_token(from_key)
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to_id = _StreamToken.parse_stream_token(to_key)
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from_id = RoomStreamToken.parse_stream_token(from_key)
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to_id = RoomStreamToken.parse_stream_token(to_key)
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if from_key == to_key:
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defer.returnValue(([], to_key))
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@ -234,8 +182,8 @@ class StreamStore(SQLBaseStore):
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limit = MAX_STREAM_SIZE
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# From and to keys should be integers from ordering.
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from_id = _StreamToken.parse_stream_token(from_key)
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to_id = _StreamToken.parse_stream_token(to_key)
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from_id = RoomStreamToken.parse_stream_token(from_key)
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to_id = RoomStreamToken.parse_stream_token(to_key)
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if from_key == to_key:
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return defer.succeed(([], to_key))
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@ -288,17 +236,17 @@ class StreamStore(SQLBaseStore):
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args = [False, room_id]
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if direction == 'b':
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order = "DESC"
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bounds = _StreamToken.parse(from_key).upper_bound()
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bounds = upper_bound(RoomStreamToken.parse(from_key))
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if to_key:
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bounds = "%s AND %s" % (
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bounds, _StreamToken.parse(to_key).lower_bound()
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bounds, lower_bound(RoomStreamToken.parse(to_key))
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)
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else:
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order = "ASC"
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bounds = _StreamToken.parse(from_key).lower_bound()
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bounds = lower_bound(RoomStreamToken.parse(from_key))
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if to_key:
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bounds = "%s AND %s" % (
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bounds, _StreamToken.parse(to_key).upper_bound()
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bounds, upper_bound(RoomStreamToken.parse(to_key))
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)
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if int(limit) > 0:
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@ -333,7 +281,7 @@ class StreamStore(SQLBaseStore):
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# when we are going backwards so we subtract one from the
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# stream part.
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toke -= 1
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next_token = str(_StreamToken(topo, toke))
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next_token = str(RoomStreamToken(topo, toke))
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else:
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# TODO (erikj): We should work out what to do here instead.
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next_token = to_key if to_key else from_key
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@ -354,7 +302,7 @@ class StreamStore(SQLBaseStore):
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with_feedback=False, from_token=None):
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# TODO (erikj): Handle compressed feedback
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end_token = _StreamToken.parse_stream_token(end_token)
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end_token = RoomStreamToken.parse_stream_token(end_token)
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if from_token is None:
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sql = (
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@ -365,7 +313,7 @@ class StreamStore(SQLBaseStore):
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" LIMIT ?"
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)
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else:
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from_token = _StreamToken.parse_stream_token(from_token)
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from_token = RoomStreamToken.parse_stream_token(from_token)
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sql = (
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"SELECT stream_ordering, topological_ordering, event_id"
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" FROM events"
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@ -395,7 +343,7 @@ class StreamStore(SQLBaseStore):
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# stream part.
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topo = rows[0]["topological_ordering"]
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toke = rows[0]["stream_ordering"] - 1
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start_token = str(_StreamToken(topo, toke))
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start_token = str(RoomStreamToken(topo, toke))
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token = (start_token, str(end_token))
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else:
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@ -439,5 +387,5 @@ class StreamStore(SQLBaseStore):
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stream = row["stream_ordering"]
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topo = event.depth
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internal = event.internal_metadata
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internal.before = str(_StreamToken(topo, stream - 1))
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internal.after = str(_StreamToken(topo, stream))
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internal.before = str(RoomStreamToken(topo, stream - 1))
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internal.after = str(RoomStreamToken(topo, stream))
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@ -121,4 +121,56 @@ class StreamToken(
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return StreamToken(**d)
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class RoomStreamToken(namedtuple("_StreamToken", "topological stream")):
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"""Tokens are positions between events. The token "s1" comes after event 1.
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s0 s1
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[0] V [1] V [2]
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Tokens can either be a point in the live event stream or a cursor going
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through historic events.
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When traversing the live event stream events are ordered by when they
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arrived at the homeserver.
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When traversing historic events the events are ordered by their depth in
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the event graph "topological_ordering" and then by when they arrived at the
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homeserver "stream_ordering".
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Live tokens start with an "s" followed by the "stream_ordering" id of the
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event it comes after. Historic tokens start with a "t" followed by the
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"topological_ordering" id of the event it comes after, follewed by "-",
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followed by the "stream_ordering" id of the event it comes after.
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"""
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__slots__ = []
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@classmethod
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def parse(cls, string):
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try:
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if string[0] == 's':
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return cls(topological=None, stream=int(string[1:]))
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if string[0] == 't':
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parts = string[1:].split('-', 1)
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return cls(topological=int(parts[0]), stream=int(parts[1]))
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except:
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pass
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raise SynapseError(400, "Invalid token %r" % (string,))
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@classmethod
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def parse_stream_token(cls, string):
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try:
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if string[0] == 's':
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return cls(topological=None, stream=int(string[1:]))
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except:
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pass
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raise SynapseError(400, "Invalid token %r" % (string,))
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def __str__(self):
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if self.topological is not None:
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return "t%d-%d" % (self.topological, self.stream)
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else:
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return "s%d" % (self.stream,)
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ClientInfo = namedtuple("ClientInfo", ("device_id", "token_id"))
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