Refactor store.have_events

It turns out that most of the time we were calling have_events, we were only
using half of the result. Replace have_events with have_seen_events and
get_rejection_reasons, so that we can see what's going on a bit more clearly.

1 files changed, 12 insertions, 19 deletions

diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py
index 080aca3d71..ea6cb879fc 100644
--- a/synapse/handlers/federation.py
+++ b/synapse/handlers/federation.py
@@ -149,10 +149,6 @@ class FederationHandler(BaseHandler):
 
         auth_chain = []
 
-        have_seen = yield self.store.have_events(
-            [ev for ev, _ in pdu.prev_events]
-        )
-
         fetch_state = False
 
         # Get missing pdus if necessary.
@@ -168,7 +164,7 @@ class FederationHandler(BaseHandler):
             )
 
             prevs = {e_id for e_id, _ in pdu.prev_events}
-            seen = set(have_seen.keys())
+            seen = yield self.store.have_seen_events(prevs)
 
             if min_depth and pdu.depth < min_depth:
                 # This is so that we don't notify the user about this
@@ -196,8 +192,7 @@ class FederationHandler(BaseHandler):
 
                         # Update the set of things we've seen after trying to
                         # fetch the missing stuff
-                        have_seen = yield self.store.have_events(prevs)
-                        seen = set(have_seen.iterkeys())
+                        seen = yield self.store.have_seen_events(prevs)
 
                         if not prevs - seen:
                             logger.info(
@@ -248,8 +243,7 @@ class FederationHandler(BaseHandler):
             min_depth (int): Minimum depth of events to return.
         """
         # We recalculate seen, since it may have changed.
-        have_seen = yield self.store.have_events(prevs)
-        seen = set(have_seen.keys())
+        seen = yield self.store.have_seen_events(prevs)
 
         if not prevs - seen:
             return
@@ -361,9 +355,7 @@ class FederationHandler(BaseHandler):
             if auth_chain:
                 event_ids |= {e.event_id for e in auth_chain}
 
-            seen_ids = set(
-                (yield self.store.have_events(event_ids)).keys()
-            )
+            seen_ids = yield self.store.have_seen_events(event_ids)
 
             if state and auth_chain is not None:
                 # If we have any state or auth_chain given to us by the replication
@@ -633,7 +625,7 @@ class FederationHandler(BaseHandler):
 
                 failed_to_fetch = missing_auth - set(auth_events)
 
-        seen_events = yield self.store.have_events(
+        seen_events = yield self.store.have_seen_events(
             set(auth_events.keys()) | set(state_events.keys())
         )
 
@@ -1736,7 +1728,8 @@ class FederationHandler(BaseHandler):
             event_key = None
 
         if event_auth_events - current_state:
-            have_events = yield self.store.have_events(
+            # TODO: can we use store.have_seen_events here instead?
+            have_events = yield self.store.get_seen_events_with_rejections(
                 event_auth_events - current_state
             )
         else:
@@ -1759,12 +1752,12 @@ class FederationHandler(BaseHandler):
                     origin, event.room_id, event.event_id
                 )
 
-                seen_remotes = yield self.store.have_events(
+                seen_remotes = yield self.store.have_seen_events(
                     [e.event_id for e in remote_auth_chain]
                 )
 
                 for e in remote_auth_chain:
-                    if e.event_id in seen_remotes.keys():
+                    if e.event_id in seen_remotes:
                         continue
 
                     if e.event_id == event.event_id:
@@ -1791,7 +1784,7 @@ class FederationHandler(BaseHandler):
                     except AuthError:
                         pass
 
-                have_events = yield self.store.have_events(
+                have_events = yield self.store.get_seen_events_with_rejections(
                     [e_id for e_id, _ in event.auth_events]
                 )
                 seen_events = set(have_events.keys())
@@ -1876,13 +1869,13 @@ class FederationHandler(BaseHandler):
                         local_auth_chain,
                     )
 
-                    seen_remotes = yield self.store.have_events(
+                    seen_remotes = yield self.store.have_seen_events(
                         [e.event_id for e in result["auth_chain"]]
                     )
 
                     # 3. Process any remote auth chain events we haven't seen.
                     for ev in result["auth_chain"]:
-                        if ev.event_id in seen_remotes.keys():
+                        if ev.event_id in seen_remotes:
                             continue
 
                         if ev.event_id == event.event_id: