- new AppendEntries(currentTerm(), context.getId(),
- prevLogIndex(nextIndex), prevLogTerm(nextIndex),
- entries, context.getCommitIndex()
- ),
- actor()
- );
+ new AppendEntries(currentTerm(), context.getId(), prevLogIndex(nextIndex),
+ prevLogTerm(nextIndex), entries, context.getCommitIndex()).toSerializable(),
+ actor());
+ }
+ }
+
+ /**
+ * An installSnapshot is scheduled at a interval that is a multiple of
+ * a HEARTBEAT_INTERVAL. This is to avoid the need to check for installing
+ * snapshots at every heartbeat.
+ */
+ private void installSnapshotIfNeeded(){
+ for (String followerId : followerToActor.keySet()) {
+ ActorSelection followerActor =
+ followerToActor.get(followerId);
+
+ FollowerLogInformation followerLogInformation =
+ followerToLog.get(followerId);
+
+ long nextIndex = followerLogInformation.getNextIndex().get();
+
+ if(!context.getReplicatedLog().isPresent(nextIndex) && context.getReplicatedLog().isInSnapshot(nextIndex)){
+ followerActor.tell(
+ new InstallSnapshot(currentTerm(), context.getId(),
+ context.getReplicatedLog().getSnapshotIndex(),
+ context.getReplicatedLog().getSnapshotTerm(),
+ context.getReplicatedLog().getSnapshot()
+ ),
+ actor()
+ );
+ }