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Store state groups separately from events (#2784)

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* Split state group persist into seperate storage func

* Add per database engine code for state group id gen

* Move store_state_group to StateReadStore

This allows other workers to use it, and so resolve state.

* Hook up store_state_group

* Fix tests

* Rename _store_mult_state_groups_txn

* Rename StateGroupReadStore

* Remove redundant _have_persisted_state_group_txn

* Update comments

* Comment compute_event_context

* Set start val for state_group_id_seq

... otherwise we try to recreate old state groups

* Update comments

* Don't store state for outliers

* Update comment

* Update docstring as state groups are ints
This commit is contained in:
Erik Johnston 2018-02-06 14:31:24 +00:00 • committed by GitHub
parent b31bf0bb51
commit 3d33eef6fc
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12 changed files with 341 additions and 204 deletions
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24
synapse/handlers/federation.py
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@ -1831,8 +1831,8 @@ class FederationHandler(BaseHandler):
current_state = set(e.event_id for e in auth_events.values())
different_auth = event_auth_events - current_state
self._update_context_for_auth_events(
context, auth_events, event_key,
yield self._update_context_for_auth_events(
event, context, auth_events, event_key,
)
if different_auth and not event.internal_metadata.is_outlier():
@ -1913,8 +1913,8 @@ class FederationHandler(BaseHandler):
# 4. Look at rejects and their proofs.
# TODO.
self._update_context_for_auth_events(
context, auth_events, event_key,
yield self._update_context_for_auth_events(
event, context, auth_events, event_key,
)
try:
@ -1923,11 +1923,15 @@ class FederationHandler(BaseHandler):
logger.warn("Failed auth resolution for %r because %s", event, e)
raise e
def _update_context_for_auth_events(self, context, auth_events,
@defer.inlineCallbacks
def _update_context_for_auth_events(self, event, context, auth_events,
event_key):
"""Update the state_ids in an event context after auth event resolution
"""Update the state_ids in an event context after auth event resolution,
storing the changes as a new state group.
Args:
event (Event): The event we're handling the context for
context (synapse.events.snapshot.EventContext): event context
to be updated
@ -1950,7 +1954,13 @@ class FederationHandler(BaseHandler):
context.prev_state_ids.update({
k: a.event_id for k, a in auth_events.iteritems()
})
context.state_group = self.store.get_next_state_group()
context.state_group = yield self.store.store_state_group(
event.event_id,
event.room_id,
prev_group=context.prev_group,
delta_ids=context.delta_ids,
current_state_ids=context.current_state_ids,
)
@defer.inlineCallbacks
def construct_auth_difference(self, local_auth, remote_auth):