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https://github.com/matrix-org/synapse.git
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Refactor _get_events
This commit is contained in:
Erik Johnston
parent
36ea26c5c0
commit
cdb3757942
@ -17,6 +17,7 @@ import logging
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from synapse.api.errors import StoreError
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from synapse.events import FrozenEvent
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from synapse.events.utils import prune_event
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from synapse.util import unwrap_deferred
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from synapse.util.logutils import log_function
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from synapse.util.logcontext import preserve_context_over_fn, LoggingContext
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from synapse.util.lrucache import LruCache
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@ -28,7 +29,6 @@ from twisted.internet import defer
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from collections import namedtuple, OrderedDict
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import functools
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import itertools
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import simplejson as json
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import sys
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import time
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@ -870,35 +870,43 @@ class SQLBaseStore(object):
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@defer.inlineCallbacks
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def _get_events(self, event_ids, check_redacted=True,
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get_prev_content=False, desc="_get_events"):
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N = 50 # Only fetch 100 events at a time.
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get_prev_content=False, allow_rejected=False, txn=None):
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if not event_ids:
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defer.returnValue([])
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ds = [
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self._fetch_events(
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event_ids[i*N:(i+1)*N],
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event_map = self._get_events_from_cache(
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event_ids,
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check_redacted=check_redacted,
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get_prev_content=get_prev_content,
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allow_rejected=allow_rejected,
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)
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for i in range(1 + len(event_ids) / N)
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]
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res = yield defer.gatherResults(ds, consumeErrors=True)
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missing_events = [e for e in event_ids if e not in event_map]
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defer.returnValue(
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list(itertools.chain(*res))
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missing_events = yield self._fetch_events(
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txn,
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missing_events,
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check_redacted=check_redacted,
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get_prev_content=get_prev_content,
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allow_rejected=allow_rejected,
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)
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event_map.update(missing_events)
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defer.returnValue([
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event_map[e_id] for e_id in event_ids
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if e_id in event_map and event_map[e_id]
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])
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def _get_events_txn(self, txn, event_ids, check_redacted=True,
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get_prev_content=False):
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N = 50 # Only fetch 100 events at a time.
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return list(itertools.chain(*[
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self._fetch_events_txn(
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txn, event_ids[i*N:(i+1)*N],
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get_prev_content=False, allow_rejected=False):
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return unwrap_deferred(self._get_events(
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event_ids,
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check_redacted=check_redacted,
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get_prev_content=get_prev_content,
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)
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for i in range(1 + len(event_ids) / N)
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]))
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allow_rejected=allow_rejected,
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txn=txn,
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))
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def _invalidate_get_event_cache(self, event_id):
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for check_redacted in (False, True):
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@ -909,68 +917,24 @@ class SQLBaseStore(object):
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def _get_event_txn(self, txn, event_id, check_redacted=True,
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get_prev_content=False, allow_rejected=False):
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start_time = time.time() * 1000
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def update_counter(desc, last_time):
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curr_time = self._get_event_counters.update(desc, last_time)
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sql_getevents_timer.inc_by(curr_time - last_time, desc)
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return curr_time
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try:
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ret = self._get_event_cache.get(event_id, check_redacted, get_prev_content)
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if allow_rejected or not ret.rejected_reason:
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return ret
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else:
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return None
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except KeyError:
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pass
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finally:
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start_time = update_counter("event_cache", start_time)
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sql = (
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"SELECT e.internal_metadata, e.json, r.redacts, rej.event_id "
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"FROM event_json as e "
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"LEFT JOIN rejections as rej USING (event_id) "
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"LEFT JOIN redactions as r ON e.event_id = r.redacts "
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"WHERE e.event_id = ? "
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"LIMIT 1 "
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)
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txn.execute(sql, (event_id,))
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res = txn.fetchone()
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if not res:
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return None
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internal_metadata, js, redacted, rejected_reason = res
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start_time = update_counter("select_event", start_time)
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result = self._get_event_from_row_txn(
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txn, internal_metadata, js, redacted,
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events = self._get_events_txn(
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txn, [event_id],
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check_redacted=check_redacted,
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get_prev_content=get_prev_content,
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rejected_reason=rejected_reason,
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allow_rejected=allow_rejected,
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)
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self._get_event_cache.prefill(event_id, check_redacted, get_prev_content, result)
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if allow_rejected or not rejected_reason:
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return result
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else:
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return None
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def _fetch_events_txn(self, txn, events, check_redacted=True,
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get_prev_content=False, allow_rejected=False):
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if not events:
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return []
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return events[0] if events else None
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def _get_events_from_cache(self, events, check_redacted, get_prev_content,
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allow_rejected):
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event_map = {}
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for event_id in events:
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try:
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ret = self._get_event_cache.get(event_id, check_redacted, get_prev_content)
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ret = self._get_event_cache.get(
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event_id, check_redacted, get_prev_content
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)
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if allow_rejected or not ret.rejected_reason:
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event_map[event_id] = ret
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@ -979,136 +943,82 @@ class SQLBaseStore(object):
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except KeyError:
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pass
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missing_events = [
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e for e in events
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if e not in event_map
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]
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if missing_events:
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sql = (
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"SELECT e.internal_metadata, e.json, r.redacts, rej.event_id "
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" FROM event_json as e"
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" LEFT JOIN rejections as rej USING (event_id)"
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" LEFT JOIN redactions as r ON e.event_id = r.redacts"
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" WHERE e.event_id IN (%s)"
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) % (",".join(["?"]*len(missing_events)),)
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txn.execute(sql, missing_events)
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rows = txn.fetchall()
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res = [
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self._get_event_from_row_txn(
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txn, row[0], row[1], row[2],
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check_redacted=check_redacted,
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get_prev_content=get_prev_content,
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rejected_reason=row[3],
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)
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for row in rows
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]
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event_map.update({
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e.event_id: e
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for e in res if e
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})
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for e in res:
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self._get_event_cache.prefill(
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e.event_id, check_redacted, get_prev_content, e
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)
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return [
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event_map[e_id] for e_id in events
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if e_id in event_map and event_map[e_id]
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]
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return event_map
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@defer.inlineCallbacks
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def _fetch_events(self, events, check_redacted=True,
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def _fetch_events(self, txn, events, check_redacted=True,
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get_prev_content=False, allow_rejected=False):
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if not events:
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defer.returnValue([])
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defer.returnValue({})
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event_map = {}
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rows = []
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N = 2
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for i in range(1 + len(events) / N):
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evs = events[i*N:(i + 1)*N]
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if not evs:
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break
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for event_id in events:
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try:
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ret = self._get_event_cache.get(event_id, check_redacted, get_prev_content)
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if allow_rejected or not ret.rejected_reason:
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event_map[event_id] = ret
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else:
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event_map[event_id] = None
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except KeyError:
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pass
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missing_events = [
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e for e in events
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if e not in event_map
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]
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if missing_events:
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sql = (
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"SELECT e.internal_metadata, e.json, r.redacts, rej.event_id "
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" FROM event_json as e"
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" LEFT JOIN rejections as rej USING (event_id)"
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" LEFT JOIN redactions as r ON e.event_id = r.redacts"
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" WHERE e.event_id IN (%s)"
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) % (",".join(["?"]*len(missing_events)),)
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) % (",".join(["?"]*len(evs)),)
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rows = yield self._execute(
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"_fetch_events",
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None,
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sql,
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*missing_events
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)
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if txn:
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txn.execute(sql, evs)
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rows.extend(txn.fetchall())
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else:
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res = yield self._execute("_fetch_events", None, sql, *evs)
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rows.extend(res)
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res_ds = [
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self._get_event_from_row(
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res = []
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for row in rows:
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e = yield self._get_event_from_row(
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txn,
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row[0], row[1], row[2],
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check_redacted=check_redacted,
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get_prev_content=get_prev_content,
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rejected_reason=row[3],
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)
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for row in rows
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]
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res = yield defer.gatherResults(res_ds, consumeErrors=True)
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event_map.update({
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e.event_id: e
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for e in res if e
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})
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res.append(e)
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for e in res:
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self._get_event_cache.prefill(
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e.event_id, check_redacted, get_prev_content, e
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)
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defer.returnValue([
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event_map[e_id] for e_id in events
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if e_id in event_map and event_map[e_id]
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])
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defer.returnValue({
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e.event_id: e
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for e in res if e
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})
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@defer.inlineCallbacks
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def _get_event_from_row(self, internal_metadata, js, redacted,
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def _get_event_from_row(self, txn, internal_metadata, js, redacted,
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check_redacted=True, get_prev_content=False,
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rejected_reason=None):
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start_time = time.time() * 1000
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def update_counter(desc, last_time):
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curr_time = self._get_event_counters.update(desc, last_time)
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sql_getevents_timer.inc_by(curr_time - last_time, desc)
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return curr_time
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d = json.loads(js)
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start_time = update_counter("decode_json", start_time)
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internal_metadata = json.loads(internal_metadata)
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start_time = update_counter("decode_internal", start_time)
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def select(txn, *args, **kwargs):
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if txn:
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return self._simple_select_one_onecol_txn(txn, *args, **kwargs)
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else:
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return self._simple_select_one_onecol(
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*args,
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desc="_get_event_from_row", **kwargs
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)
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def get_event(txn, *args, **kwargs):
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if txn:
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return self._get_event_txn(txn, *args, **kwargs)
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else:
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return self.get_event(*args, **kwargs)
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if rejected_reason:
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rejected_reason = yield self._simple_select_one_onecol(
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desc="_get_event_from_row",
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rejected_reason = yield select(
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txn,
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table="rejections",
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keyvalues={"event_id": rejected_reason},
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retcol="reason",
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@ -1119,13 +1029,12 @@ class SQLBaseStore(object):
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internal_metadata_dict=internal_metadata,
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rejected_reason=rejected_reason,
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)
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start_time = update_counter("build_frozen_event", start_time)
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if check_redacted and redacted:
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ev = prune_event(ev)
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redaction_id = yield self._simple_select_one_onecol(
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desc="_get_event_from_row",
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redaction_id = yield select(
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txn,
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table="redactions",
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keyvalues={"redacts": ev.event_id},
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retcol="event_id",
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@ -1134,93 +1043,26 @@ class SQLBaseStore(object):
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ev.unsigned["redacted_by"] = redaction_id
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# Get the redaction event.
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because = yield self.get_event_txn(
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because = yield get_event(
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txn,
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redaction_id,
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check_redacted=False
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)
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if because:
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ev.unsigned["redacted_because"] = because
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start_time = update_counter("redact_event", start_time)
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if get_prev_content and "replaces_state" in ev.unsigned:
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prev = yield self.get_event(
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prev = yield get_event(
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txn,
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ev.unsigned["replaces_state"],
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get_prev_content=False,
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)
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if prev:
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ev.unsigned["prev_content"] = prev.get_dict()["content"]
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start_time = update_counter("get_prev_content", start_time)
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defer.returnValue(ev)
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def _get_event_from_row_txn(self, txn, internal_metadata, js, redacted,
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check_redacted=True, get_prev_content=False,
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rejected_reason=None):
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start_time = time.time() * 1000
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def update_counter(desc, last_time):
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curr_time = self._get_event_counters.update(desc, last_time)
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sql_getevents_timer.inc_by(curr_time - last_time, desc)
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return curr_time
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d = json.loads(js)
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start_time = update_counter("decode_json", start_time)
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internal_metadata = json.loads(internal_metadata)
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start_time = update_counter("decode_internal", start_time)
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if rejected_reason:
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rejected_reason = self._simple_select_one_onecol_txn(
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txn,
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table="rejections",
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keyvalues={"event_id": rejected_reason},
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retcol="reason",
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)
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ev = FrozenEvent(
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d,
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internal_metadata_dict=internal_metadata,
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rejected_reason=rejected_reason,
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)
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start_time = update_counter("build_frozen_event", start_time)
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if check_redacted and redacted:
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ev = prune_event(ev)
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redaction_id = self._simple_select_one_onecol_txn(
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txn,
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table="redactions",
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keyvalues={"redacts": ev.event_id},
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retcol="event_id",
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)
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ev.unsigned["redacted_by"] = redaction_id
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# Get the redaction event.
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because = self._get_event_txn(
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txn,
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redaction_id,
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check_redacted=False
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)
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if because:
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ev.unsigned["redacted_because"] = because
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start_time = update_counter("redact_event", start_time)
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if get_prev_content and "replaces_state" in ev.unsigned:
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prev = self._get_event_txn(
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txn,
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ev.unsigned["replaces_state"],
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get_prev_content=False,
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)
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if prev:
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ev.unsigned["prev_content"] = prev.get_dict()["content"]
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start_time = update_counter("get_prev_content", start_time)
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return ev
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def _parse_events(self, rows):
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return self.runInteraction(
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"_parse_events", self._parse_events_txn, rows
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@ -85,7 +85,7 @@ class StateStore(SQLBaseStore):
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@defer.inlineCallbacks
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def c(vals):
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vals[:] = yield self._fetch_events(vals, get_prev_content=False)
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vals[:] = yield self._get_events(vals, get_prev_content=False)
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yield defer.gatherResults(
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[
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@ -29,6 +29,34 @@ def unwrapFirstError(failure):
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return failure.value.subFailure
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def unwrap_deferred(d):
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"""Given a deferred that we know has completed, return its value or raise
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the failure as an exception
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"""
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if not d.called:
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raise RuntimeError("deferred has not finished")
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res = []
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def f(r):
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res.append(r)
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return r
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d.addCallback(f)
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if res:
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return res[0]
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def f(r):
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res.append(r)
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return r
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d.addErrback(f)
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if res:
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res[0].raiseException()
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else:
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raise RuntimeError("deferred did not call callbacks")
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class Clock(object):
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"""A small utility that obtains current time-of-day so that time may be
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mocked during unit-tests.
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|
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