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Move storage.stream._StreamToken to types.RoomStreamToken

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This commit is contained in:
Erik Johnston 2015-05-11 18:00:33 +01:00
parent d244fa9741
commit 17653a5dfe
2 changed files with 85 additions and 85 deletions
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118
synapse/storage/stream.py
View File

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

52
synapse/types.py
View File

@ -121,4 +121,56 @@ class StreamToken(
return StreamToken(**d)
class RoomStreamToken(namedtuple("_StreamToken", "topological stream")):
"""Tokens are positions between events. The token "s1" comes after event 1.
s0 s1
| |
[0] V [1] V [2]
Tokens can either be a point in the live event stream or a cursor going
through historic events.
When traversing the live event stream events are ordered by when they
arrived at the homeserver.
When traversing historic events the events are ordered by their depth in
the event graph "topological_ordering" and then by when they arrived at the
homeserver "stream_ordering".
Live tokens start with an "s" followed by the "stream_ordering" id of the
event it comes after. Historic tokens start with a "t" followed by the
"topological_ordering" id of the event it comes after, follewed by "-",
followed by the "stream_ordering" id of the event it comes after.
"""
__slots__ = []
@classmethod
def parse(cls, string):
try:
if string[0] == 's':
return cls(topological=None, stream=int(string[1:]))
if string[0] == 't':
parts = string[1:].split('-', 1)
return cls(topological=int(parts[0]), stream=int(parts[1]))
except:
pass
raise SynapseError(400, "Invalid token %r" % (string,))
@classmethod
def parse_stream_token(cls, string):
try:
if string[0] == 's':
return cls(topological=None, stream=int(string[1:]))
except:
pass
raise SynapseError(400, "Invalid token %r" % (string,))
def __str__(self):
if self.topological is not None:
return "t%d-%d" % (self.topological, self.stream)
else:
return "s%d" % (self.stream,)
ClientInfo = namedtuple("ClientInfo", ("device_id", "token_id"))