mirror of
https://mau.dev/maunium/synapse.git
synced 2024-10-01 01:36:05 -04:00
Implement new state resolution algorithm
This commit is contained in:
Erik Johnston
parent
dc70d1fef8
commit
6dcade97be
107
synapse/state.py
107
synapse/state.py
@ -19,6 +19,7 @@ from twisted.internet import defer
|
||||
from synapse.util.logutils import log_function
|
||||
from synapse.util.async import run_on_reactor
|
||||
from synapse.api.constants import EventTypes
|
||||
from synapse.api.errors import AuthError
|
||||
from synapse.events.snapshot import EventContext
|
||||
|
||||
from collections import namedtuple
|
||||
@ -42,6 +43,8 @@ class StateHandler(object):
|
||||
|
||||
def __init__(self, hs):
|
||||
self.store = hs.get_datastore()
|
||||
# self.auth = hs.get_auth()
|
||||
self.hs = hs
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def get_current_state(self, room_id, event_type=None, state_key=""):
|
||||
@ -210,15 +213,22 @@ class StateHandler(object):
|
||||
else:
|
||||
prev_states = []
|
||||
|
||||
auth_events = {
|
||||
k: e for k, e in unconflicted_state.items()
|
||||
if k[0] in (EventTypes.Create, EventTypes.Member, EventTypes.PowerLevels,)
|
||||
}
|
||||
|
||||
try:
|
||||
new_state = {}
|
||||
new_state.update(unconflicted_state)
|
||||
for key, events in conflicted_state.items():
|
||||
new_state[key] = self._resolve_state_events(events)
|
||||
resolved_state = self._resolve_state_events(
|
||||
conflicted_state, auth_events
|
||||
)
|
||||
except:
|
||||
logger.exception("Failed to resolve state")
|
||||
raise
|
||||
|
||||
new_state = unconflicted_state
|
||||
new_state.update(resolved_state)
|
||||
|
||||
defer.returnValue((None, new_state, prev_states))
|
||||
|
||||
def _get_power_level_from_event_state(self, event, user_id):
|
||||
@ -238,36 +248,65 @@ class StateHandler(object):
|
||||
return 0
|
||||
|
||||
@log_function
|
||||
def _resolve_state_events(self, events):
|
||||
curr_events = events
|
||||
def _resolve_state_events(self, conflicted_state, auth_events):
|
||||
resolved_state = {}
|
||||
power_key = (EventTypes.PowerLevels, "")
|
||||
if power_key in conflicted_state.items():
|
||||
power_levels = conflicted_state[power_key]
|
||||
resolved_state[power_key] = self._resolve_auth_events(power_levels)
|
||||
|
||||
new_powers = [
|
||||
self._get_power_level_from_event_state(e, e.user_id)
|
||||
for e in curr_events
|
||||
]
|
||||
auth_events.update(resolved_state)
|
||||
|
||||
new_powers = [
|
||||
int(p) if p else 0 for p in new_powers
|
||||
]
|
||||
|
||||
max_power = max(new_powers)
|
||||
|
||||
curr_events = [
|
||||
z[0] for z in zip(curr_events, new_powers)
|
||||
if z[1] == max_power
|
||||
]
|
||||
|
||||
if not curr_events:
|
||||
raise RuntimeError("Max didn't get a max?")
|
||||
elif len(curr_events) == 1:
|
||||
return curr_events[0]
|
||||
|
||||
# TODO: For now, just choose the one with the largest event_id.
|
||||
return (
|
||||
sorted(
|
||||
curr_events,
|
||||
key=lambda e: hashlib.sha1(
|
||||
e.event_id + e.user_id + e.room_id + e.type
|
||||
).hexdigest()
|
||||
)[0]
|
||||
for key, events in conflicted_state.items():
|
||||
if key[0] == EventTypes.Member:
|
||||
resolved_state[key] = self._resolve_auth_events(
|
||||
events,
|
||||
auth_events
|
||||
)
|
||||
|
||||
auth_events.update(resolved_state)
|
||||
|
||||
for key, events in conflicted_state.items():
|
||||
if key not in resolved_state:
|
||||
resolved_state[key] = self._resolve_normal_events(
|
||||
events, auth_events
|
||||
)
|
||||
|
||||
return resolved_state
|
||||
|
||||
def _resolve_auth_events(self, events, auth_events):
|
||||
reverse = [i for i in reversed(self._ordered_events(events))]
|
||||
|
||||
auth_events = dict(auth_events)
|
||||
|
||||
prev_event = reverse[0]
|
||||
for event in reverse[1:]:
|
||||
auth_events[(prev_event.type, prev_event.state_key)] = prev_event
|
||||
try:
|
||||
# FIXME: hs.get_auth() is bad style, but we need to do it to
|
||||
# get around circular deps.
|
||||
self.hs.get_auth().check(event, auth_events)
|
||||
prev_event = event
|
||||
except AuthError:
|
||||
return prev_event
|
||||
|
||||
return event
|
||||
|
||||
def _resolve_normal_events(self, events, auth_events):
|
||||
for event in self._ordered_events(events):
|
||||
try:
|
||||
# FIXME: hs.get_auth() is bad style, but we need to do it to
|
||||
# get around circular deps.
|
||||
self.hs.get_auth().check(event, auth_events)
|
||||
return event
|
||||
except AuthError as e:
|
||||
pass
|
||||
|
||||
# Oh dear.
|
||||
return event
|
||||
|
||||
def _ordered_events(self, events):
|
||||
def key_func(e):
|
||||
return -int(e.depth), hashlib.sha1(e.event_id).hexdigest()
|
||||
|
||||
return sorted(events, key=key_func)
|
||||
@ -16,11 +16,120 @@
|
||||
from tests import unittest
|
||||
from twisted.internet import defer
|
||||
|
||||
from synapse.events import FrozenEvent
|
||||
from synapse.api.auth import Auth
|
||||
from synapse.api.constants import EventTypes, Membership
|
||||
from synapse.state import StateHandler
|
||||
|
||||
from mock import Mock
|
||||
|
||||
|
||||
_next_event_id = 1000
|
||||
|
||||
|
||||
def create_event(name=None, type=None, state_key=None, depth=2, event_id=None,
|
||||
prev_events=[], **kwargs):
|
||||
global _next_event_id
|
||||
|
||||
if not event_id:
|
||||
_next_event_id += 1
|
||||
event_id = str(_next_event_id)
|
||||
|
||||
if not name:
|
||||
if state_key is not None:
|
||||
name = "<%s-%s, %s>" % (type, state_key, event_id,)
|
||||
else:
|
||||
name = "<%s, %s>" % (type, event_id,)
|
||||
|
||||
d = {
|
||||
"event_id": event_id,
|
||||
"type": type,
|
||||
"sender": "@user_id:example.com",
|
||||
"room_id": "!room_id:example.com",
|
||||
"depth": depth,
|
||||
"prev_events": prev_events,
|
||||
}
|
||||
|
||||
if state_key is not None:
|
||||
d["state_key"] = state_key
|
||||
|
||||
d.update(kwargs)
|
||||
|
||||
event = FrozenEvent(d)
|
||||
|
||||
return event
|
||||
|
||||
|
||||
class StateGroupStore(object):
|
||||
def __init__(self):
|
||||
self._event_to_state_group = {}
|
||||
self._group_to_state = {}
|
||||
|
||||
self._next_group = 1
|
||||
|
||||
def get_state_groups(self, event_ids):
|
||||
groups = {}
|
||||
for event_id in event_ids:
|
||||
group = self._event_to_state_group.get(event_id)
|
||||
if group:
|
||||
groups[group] = self._group_to_state[group]
|
||||
|
||||
return defer.succeed(groups)
|
||||
|
||||
def store_state_groups(self, event, context):
|
||||
if context.current_state is None:
|
||||
return
|
||||
|
||||
state_events = context.current_state
|
||||
|
||||
if event.is_state():
|
||||
state_events[(event.type, event.state_key)] = event
|
||||
|
||||
state_group = context.state_group
|
||||
if not state_group:
|
||||
state_group = self._next_group
|
||||
self._next_group += 1
|
||||
|
||||
self._group_to_state[state_group] = state_events.values()
|
||||
|
||||
self._event_to_state_group[event.event_id] = state_group
|
||||
|
||||
|
||||
class DictObj(dict):
|
||||
def __init__(self, **kwargs):
|
||||
super(DictObj, self).__init__(kwargs)
|
||||
self.__dict__ = self
|
||||
|
||||
|
||||
class Graph(object):
|
||||
def __init__(self, nodes, edges):
|
||||
events = {}
|
||||
clobbered = set(events.keys())
|
||||
|
||||
for event_id, fields in nodes.items():
|
||||
refs = edges.get(event_id)
|
||||
if refs:
|
||||
clobbered.difference_update(refs)
|
||||
prev_events = [(r, {}) for r in refs]
|
||||
else:
|
||||
prev_events = []
|
||||
|
||||
events[event_id] = create_event(
|
||||
event_id=event_id,
|
||||
prev_events=prev_events,
|
||||
**fields
|
||||
)
|
||||
|
||||
self._leaves = clobbered
|
||||
self._events = sorted(events.values(), key=lambda e: e.depth)
|
||||
|
||||
def walk(self):
|
||||
return iter(self._events)
|
||||
|
||||
def get_leaves(self):
|
||||
return (self._events[i] for i in self._leaves)
|
||||
|
||||
|
||||
class StateTestCase(unittest.TestCase):
|
||||
def setUp(self):
|
||||
self.store = Mock(
|
||||
@ -29,20 +138,188 @@ class StateTestCase(unittest.TestCase):
|
||||
"add_event_hashes",
|
||||
]
|
||||
)
|
||||
hs = Mock(spec=["get_datastore"])
|
||||
hs = Mock(spec=["get_datastore", "get_auth", "get_state_handler"])
|
||||
hs.get_datastore.return_value = self.store
|
||||
hs.get_state_handler.return_value = None
|
||||
hs.get_auth.return_value = Auth(hs)
|
||||
|
||||
self.state = StateHandler(hs)
|
||||
self.event_id = 0
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def test_branch_no_conflict(self):
|
||||
graph = Graph(
|
||||
nodes={
|
||||
"START": DictObj(
|
||||
type=EventTypes.Create,
|
||||
state_key="",
|
||||
depth=1,
|
||||
),
|
||||
"A": DictObj(
|
||||
type=EventTypes.Message,
|
||||
depth=2,
|
||||
),
|
||||
"B": DictObj(
|
||||
type=EventTypes.Message,
|
||||
depth=3,
|
||||
),
|
||||
"C": DictObj(
|
||||
type=EventTypes.Name,
|
||||
state_key="",
|
||||
depth=3,
|
||||
),
|
||||
"D": DictObj(
|
||||
type=EventTypes.Message,
|
||||
depth=4,
|
||||
),
|
||||
},
|
||||
edges={
|
||||
"A": ["START"],
|
||||
"B": ["A"],
|
||||
"C": ["A"],
|
||||
"D": ["B", "C"]
|
||||
}
|
||||
)
|
||||
|
||||
store = StateGroupStore()
|
||||
self.store.get_state_groups.side_effect = store.get_state_groups
|
||||
|
||||
context_store = {}
|
||||
|
||||
for event in graph.walk():
|
||||
context = yield self.state.compute_event_context(event)
|
||||
store.store_state_groups(event, context)
|
||||
context_store[event.event_id] = context
|
||||
|
||||
self.assertEqual(2, len(context_store["D"].current_state))
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def test_branch_basic_conflict(self):
|
||||
graph = Graph(
|
||||
nodes={
|
||||
"START": DictObj(
|
||||
type=EventTypes.Create,
|
||||
state_key="creator",
|
||||
content={"membership": "@user_id:example.com"},
|
||||
depth=1,
|
||||
),
|
||||
"A": DictObj(
|
||||
type=EventTypes.Member,
|
||||
state_key="@user_id:example.com",
|
||||
content={"membership": Membership.JOIN},
|
||||
membership=Membership.JOIN,
|
||||
depth=2,
|
||||
),
|
||||
"B": DictObj(
|
||||
type=EventTypes.Name,
|
||||
state_key="",
|
||||
depth=3,
|
||||
),
|
||||
"C": DictObj(
|
||||
type=EventTypes.Name,
|
||||
state_key="",
|
||||
depth=4,
|
||||
),
|
||||
"D": DictObj(
|
||||
type=EventTypes.Message,
|
||||
depth=5,
|
||||
),
|
||||
},
|
||||
edges={
|
||||
"A": ["START"],
|
||||
"B": ["A"],
|
||||
"C": ["A"],
|
||||
"D": ["B", "C"]
|
||||
}
|
||||
)
|
||||
|
||||
store = StateGroupStore()
|
||||
self.store.get_state_groups.side_effect = store.get_state_groups
|
||||
|
||||
context_store = {}
|
||||
|
||||
for event in graph.walk():
|
||||
context = yield self.state.compute_event_context(event)
|
||||
store.store_state_groups(event, context)
|
||||
context_store[event.event_id] = context
|
||||
|
||||
self.assertSetEqual(
|
||||
{"START", "A", "C"},
|
||||
{e.event_id for e in context_store["D"].current_state.values()}
|
||||
)
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def test_branch_have_banned_conflict(self):
|
||||
graph = Graph(
|
||||
nodes={
|
||||
"START": DictObj(
|
||||
type=EventTypes.Create,
|
||||
state_key="creator",
|
||||
content={"membership": "@user_id:example.com"},
|
||||
depth=1,
|
||||
),
|
||||
"A": DictObj(
|
||||
type=EventTypes.Member,
|
||||
state_key="@user_id:example.com",
|
||||
content={"membership": Membership.JOIN},
|
||||
membership=Membership.JOIN,
|
||||
depth=2,
|
||||
),
|
||||
"B": DictObj(
|
||||
type=EventTypes.Name,
|
||||
state_key="",
|
||||
depth=3,
|
||||
),
|
||||
"C": DictObj(
|
||||
type=EventTypes.Member,
|
||||
state_key="@user_id_2:example.com",
|
||||
content={"membership": Membership.BAN},
|
||||
membership=Membership.BAN,
|
||||
depth=4,
|
||||
),
|
||||
"D": DictObj(
|
||||
type=EventTypes.Name,
|
||||
state_key="",
|
||||
depth=4,
|
||||
sender="@user_id_2:example.com",
|
||||
),
|
||||
"E": DictObj(
|
||||
type=EventTypes.Message,
|
||||
depth=5,
|
||||
),
|
||||
},
|
||||
edges={
|
||||
"A": ["START"],
|
||||
"B": ["A"],
|
||||
"C": ["B"],
|
||||
"D": ["B"],
|
||||
"E": ["C", "D"]
|
||||
}
|
||||
)
|
||||
|
||||
store = StateGroupStore()
|
||||
self.store.get_state_groups.side_effect = store.get_state_groups
|
||||
|
||||
context_store = {}
|
||||
|
||||
for event in graph.walk():
|
||||
context = yield self.state.compute_event_context(event)
|
||||
store.store_state_groups(event, context)
|
||||
context_store[event.event_id] = context
|
||||
|
||||
self.assertSetEqual(
|
||||
{"START", "A", "B", "C"},
|
||||
{e.event_id for e in context_store["E"].current_state.values()}
|
||||
)
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def test_annotate_with_old_message(self):
|
||||
event = self.create_event(type="test_message", name="event")
|
||||
event = create_event(type="test_message", name="event")
|
||||
|
||||
old_state = [
|
||||
self.create_event(type="test1", state_key="1"),
|
||||
self.create_event(type="test1", state_key="2"),
|
||||
self.create_event(type="test2", state_key=""),
|
||||
create_event(type="test1", state_key="1"),
|
||||
create_event(type="test1", state_key="2"),
|
||||
create_event(type="test2", state_key=""),
|
||||
]
|
||||
|
||||
context = yield self.state.compute_event_context(
|
||||
@ -62,12 +339,12 @@ class StateTestCase(unittest.TestCase):
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def test_annotate_with_old_state(self):
|
||||
event = self.create_event(type="state", state_key="", name="event")
|
||||
event = create_event(type="state", state_key="", name="event")
|
||||
|
||||
old_state = [
|
||||
self.create_event(type="test1", state_key="1"),
|
||||
self.create_event(type="test1", state_key="2"),
|
||||
self.create_event(type="test2", state_key=""),
|
||||
create_event(type="test1", state_key="1"),
|
||||
create_event(type="test1", state_key="2"),
|
||||
create_event(type="test2", state_key=""),
|
||||
]
|
||||
|
||||
context = yield self.state.compute_event_context(
|
||||
@ -88,13 +365,12 @@ class StateTestCase(unittest.TestCase):
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def test_trivial_annotate_message(self):
|
||||
event = self.create_event(type="test_message", name="event")
|
||||
event.prev_events = []
|
||||
event = create_event(type="test_message", name="event")
|
||||
|
||||
old_state = [
|
||||
self.create_event(type="test1", state_key="1"),
|
||||
self.create_event(type="test1", state_key="2"),
|
||||
self.create_event(type="test2", state_key=""),
|
||||
create_event(type="test1", state_key="1"),
|
||||
create_event(type="test1", state_key="2"),
|
||||
create_event(type="test2", state_key=""),
|
||||
]
|
||||
|
||||
group_name = "group_name_1"
|
||||
@ -119,13 +395,12 @@ class StateTestCase(unittest.TestCase):
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def test_trivial_annotate_state(self):
|
||||
event = self.create_event(type="state", state_key="", name="event")
|
||||
event.prev_events = []
|
||||
event = create_event(type="state", state_key="", name="event")
|
||||
|
||||
old_state = [
|
||||
self.create_event(type="test1", state_key="1"),
|
||||
self.create_event(type="test1", state_key="2"),
|
||||
self.create_event(type="test2", state_key=""),
|
||||
create_event(type="test1", state_key="1"),
|
||||
create_event(type="test1", state_key="2"),
|
||||
create_event(type="test2", state_key=""),
|
||||
]
|
||||
|
||||
group_name = "group_name_1"
|
||||
@ -150,30 +425,21 @@ class StateTestCase(unittest.TestCase):
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def test_resolve_message_conflict(self):
|
||||
event = self.create_event(type="test_message", name="event")
|
||||
event.prev_events = []
|
||||
event = create_event(type="test_message", name="event")
|
||||
|
||||
old_state_1 = [
|
||||
self.create_event(type="test1", state_key="1"),
|
||||
self.create_event(type="test1", state_key="2"),
|
||||
self.create_event(type="test2", state_key=""),
|
||||
create_event(type="test1", state_key="1"),
|
||||
create_event(type="test1", state_key="2"),
|
||||
create_event(type="test2", state_key=""),
|
||||
]
|
||||
|
||||
old_state_2 = [
|
||||
self.create_event(type="test1", state_key="1"),
|
||||
self.create_event(type="test3", state_key="2"),
|
||||
self.create_event(type="test4", state_key=""),
|
||||
create_event(type="test1", state_key="1"),
|
||||
create_event(type="test3", state_key="2"),
|
||||
create_event(type="test4", state_key=""),
|
||||
]
|
||||
|
||||
group_name_1 = "group_name_1"
|
||||
group_name_2 = "group_name_2"
|
||||
|
||||
self.store.get_state_groups.return_value = {
|
||||
group_name_1: old_state_1,
|
||||
group_name_2: old_state_2,
|
||||
}
|
||||
|
||||
context = yield self.state.compute_event_context(event)
|
||||
context = yield self._get_context(event, old_state_1, old_state_2)
|
||||
|
||||
self.assertEqual(len(context.current_state), 5)
|
||||
|
||||
@ -181,21 +447,70 @@ class StateTestCase(unittest.TestCase):
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def test_resolve_state_conflict(self):
|
||||
event = self.create_event(type="test4", state_key="", name="event")
|
||||
event.prev_events = []
|
||||
event = create_event(type="test4", state_key="", name="event")
|
||||
|
||||
old_state_1 = [
|
||||
self.create_event(type="test1", state_key="1"),
|
||||
self.create_event(type="test1", state_key="2"),
|
||||
self.create_event(type="test2", state_key=""),
|
||||
create_event(type="test1", state_key="1"),
|
||||
create_event(type="test1", state_key="2"),
|
||||
create_event(type="test2", state_key=""),
|
||||
]
|
||||
|
||||
old_state_2 = [
|
||||
self.create_event(type="test1", state_key="1"),
|
||||
self.create_event(type="test3", state_key="2"),
|
||||
self.create_event(type="test4", state_key=""),
|
||||
create_event(type="test1", state_key="1"),
|
||||
create_event(type="test3", state_key="2"),
|
||||
create_event(type="test4", state_key=""),
|
||||
]
|
||||
|
||||
context = yield self._get_context(event, old_state_1, old_state_2)
|
||||
|
||||
self.assertEqual(len(context.current_state), 5)
|
||||
|
||||
self.assertIsNone(context.state_group)
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def test_standard_depth_conflict(self):
|
||||
event = create_event(type="test4", name="event")
|
||||
|
||||
member_event = create_event(
|
||||
type=EventTypes.Member,
|
||||
state_key="@user_id:example.com",
|
||||
content={
|
||||
"membership": Membership.JOIN,
|
||||
}
|
||||
)
|
||||
|
||||
old_state_1 = [
|
||||
member_event,
|
||||
create_event(type="test1", state_key="1", depth=1),
|
||||
]
|
||||
|
||||
old_state_2 = [
|
||||
member_event,
|
||||
create_event(type="test1", state_key="1", depth=2),
|
||||
]
|
||||
|
||||
context = yield self._get_context(event, old_state_1, old_state_2)
|
||||
|
||||
self.assertEqual(old_state_2[1], context.current_state[("test1", "1")])
|
||||
|
||||
# Reverse the depth to make sure we are actually using the depths
|
||||
# during state resolution.
|
||||
|
||||
old_state_1 = [
|
||||
member_event,
|
||||
create_event(type="test1", state_key="1", depth=2),
|
||||
]
|
||||
|
||||
old_state_2 = [
|
||||
member_event,
|
||||
create_event(type="test1", state_key="1", depth=1),
|
||||
]
|
||||
|
||||
context = yield self._get_context(event, old_state_1, old_state_2)
|
||||
|
||||
self.assertEqual(old_state_1[1], context.current_state[("test1", "1")])
|
||||
|
||||
def _get_context(self, event, old_state_1, old_state_2):
|
||||
group_name_1 = "group_name_1"
|
||||
group_name_2 = "group_name_2"
|
||||
|
||||
@ -204,33 +519,4 @@ class StateTestCase(unittest.TestCase):
|
||||
group_name_2: old_state_2,
|
||||
}
|
||||
|
||||
context = yield self.state.compute_event_context(event)
|
||||
|
||||
self.assertEqual(len(context.current_state), 5)
|
||||
|
||||
self.assertIsNone(context.state_group)
|
||||
|
||||
def create_event(self, name=None, type=None, state_key=None):
|
||||
self.event_id += 1
|
||||
event_id = str(self.event_id)
|
||||
|
||||
if not name:
|
||||
if state_key is not None:
|
||||
name = "<%s-%s>" % (type, state_key)
|
||||
else:
|
||||
name = "<%s>" % (type, )
|
||||
|
||||
event = Mock(name=name, spec=[])
|
||||
event.type = type
|
||||
|
||||
if state_key is not None:
|
||||
event.state_key = state_key
|
||||
event.event_id = event_id
|
||||
|
||||
event.is_state = lambda: (state_key is not None)
|
||||
event.unsigned = {}
|
||||
|
||||
event.user_id = "@user_id:example.com"
|
||||
event.room_id = "!room_id:example.com"
|
||||
|
||||
return event
|
||||
return self.state.compute_event_context(event)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user