Add support for storing rejected events in EventContext and data stores

synapse/events/snapshot.py

@@ -20,3 +20,4 @@ class EventContext(object):
         self.current_state = current_state
         self.auth_events = auth_events
         self.state_group = None
+        self.rejected = False

synapse/storage/__init__.py

@@ -30,6 +30,7 @@ from .transactions import TransactionStore
 from .keys import KeyStore
 from .event_federation import EventFederationStore
 from .media_repository import MediaRepositoryStore
+from .rejections import RejectionsStore
 
 from .state import StateStore
 from .signatures import SignatureStore
@@ -66,7 +67,7 @@ SCHEMAS = [
 
 # Remember to update this number every time an incompatible change is made to
 # database schema files, so the users will be informed on server restarts.
-SCHEMA_VERSION = 11
+SCHEMA_VERSION = 12
 
 
 class _RollbackButIsFineException(Exception):
@@ -82,6 +83,7 @@ class DataStore(RoomMemberStore, RoomStore,
                 DirectoryStore, KeyStore, StateStore, SignatureStore,
                 EventFederationStore,
                 MediaRepositoryStore,
+                RejectionsStore,
                 ):
 
     def __init__(self, hs):
@@ -224,6 +226,9 @@ class DataStore(RoomMemberStore, RoomStore,
         if not outlier:
             self._store_state_groups_txn(txn, event, context)
 
+        if context.rejected:
+            self._store_rejections_txn(txn, event.event_id, context.rejected)
+
         if current_state:
             txn.execute(
                 "DELETE FROM current_state_events WHERE room_id = ?",
@@ -262,7 +267,7 @@ class DataStore(RoomMemberStore, RoomStore,
                 or_replace=True,
             )
 
-            if is_new_state:
+            if is_new_state and not context.rejected:
                 self._simple_insert_txn(
                     txn,
                     "current_state_events",
@@ -288,7 +293,7 @@ class DataStore(RoomMemberStore, RoomStore,
                     or_ignore=True,
                 )
 
-            if not backfilled:
+            if not backfilled and not context.rejected:
                 self._simple_insert_txn(
                     txn,
                     table="state_forward_extremities",

synapse/storage/_base.py

@@ -458,10 +458,12 @@ class SQLBaseStore(object):
         return [e for e in events if e]
 
     def _get_event_txn(self, txn, event_id, check_redacted=True,
-                       get_prev_content=False):
+                       get_prev_content=False, allow_rejected=False):
         sql = (
-            "SELECT internal_metadata, json, r.event_id FROM event_json as e "
+            "SELECT internal_metadata, json, r.event_id, reason "
+            "FROM event_json as e "
             "LEFT JOIN redactions as r ON e.event_id = r.redacts "
+            "LEFT JOIN rejections as rej on rej.event_id = e.event_id  "
             "WHERE e.event_id = ? "
             "LIMIT 1 "
         )
@@ -473,13 +475,16 @@ class SQLBaseStore(object):
         if not res:
             return None
 
-        internal_metadata, js, redacted = res
+        internal_metadata, js, redacted, rejected_reason = res
 
-        return self._get_event_from_row_txn(
-            txn, internal_metadata, js, redacted,
-            check_redacted=check_redacted,
-            get_prev_content=get_prev_content,
-        )
+        if allow_rejected or not rejected_reason:
+            return self._get_event_from_row_txn(
+                txn, internal_metadata, js, redacted,
+                check_redacted=check_redacted,
+                get_prev_content=get_prev_content,
+            )
+        else:
+            return None
 
     def _get_event_from_row_txn(self, txn, internal_metadata, js, redacted,
                                 check_redacted=True, get_prev_content=False):

synapse/storage/rejections.py

@@ -0,0 +1,33 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014, 2015 OpenMarket Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from ._base import SQLBaseStore
+
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+class RejectionsStore(SQLBaseStore):
+    def _store_rejections_txn(self, txn, event_id, reason):
+        self._simple_insert_txn(
+            txn,
+            table="rejections",
+            values={
+                "event_id": event_id,
+                "reason": reason,
+                "last_failure": self._clock.time_msec(),
+            }
+        )

synapse/storage/schema/delta/v12.sql

@@ -0,0 +1,21 @@
+/* Copyright 2015 OpenMarket Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+CREATE TABLE IF NOT EXISTS rejections(
+    event_id TEXT NOT NULL,
+    reason TEXT NOT NULL,
+    last_check TEXT NOT NULL,
+    CONSTRAINT ev_id UNIQUE (event_id) ON CONFLICT REPLACE
+);

synapse/storage/schema/im.sql

@@ -123,3 +123,10 @@ CREATE TABLE IF NOT EXISTS room_hosts(
 );
 
 CREATE INDEX IF NOT EXISTS room_hosts_room_id ON room_hosts (room_id);
+
+CREATE TABLE IF NOT EXISTS rejections(
+    event_id TEXT NOT NULL,
+    reason TEXT NOT NULL,
+    last_check TEXT NOT NULL,
+    CONSTRAINT ev_id UNIQUE (event_id) ON CONFLICT REPLACE
+);