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!clu #3617 API improvements related to CurrentClusterState

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* Getter for CurrentClusterState in Cluster extension, updated via
  ClusterReadView
* Remove lazy init of readView. Otherwise the cluster.state will be
  empty on first access, wich is probably surprising
* Subscribe to several cluster event types at once, to ensure *one*
  CurrentClusterEvent followed by change events
* Deprecate publishCurrentClusterState, was a bad idea, use sendCurrentClusterState
  instead
* Possibility to subscribe with InitialStateAsEvents to receive events corresponding
  to CurrentClusterState
* CurrentClusterState not a ClusterDomainEvent, ticket #3614
This commit is contained in:
Patrik Nordwall 2014-01-08 14:14:48 +01:00
parent bfbee94fec
commit 2e5193347e
19 changed files with 342 additions and 99 deletions
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14
akka-samples/akka-sample-cluster-java/src/main/java/sample/cluster/stats/StatsSampleClient.java
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@ -17,9 +17,12 @@ import akka.actor.Address;
import akka.actor.Cancellable;
import akka.actor.UntypedActor;
import akka.cluster.Cluster;
import akka.cluster.ClusterEvent.UnreachableMember;
import akka.cluster.ClusterEvent.ReachableMember;
import akka.cluster.ClusterEvent.CurrentClusterState;
import akka.cluster.ClusterEvent.MemberEvent;
import akka.cluster.ClusterEvent.MemberUp;
import akka.cluster.ClusterEvent.ReachabilityEvent;
import akka.cluster.Member;
import akka.cluster.MemberStatus;
@ -44,7 +47,7 @@ public class StatsSampleClient extends UntypedActor {
//subscribe to cluster changes, MemberEvent
@Override
public void preStart() {
cluster.subscribe(getSelf(), MemberEvent.class);
cluster.subscribe(getSelf(), MemberEvent.class, ReachabilityEvent.class);
}
//re-subscribe when restart
@ -91,6 +94,15 @@ public class StatsSampleClient extends UntypedActor {
MemberEvent other = (MemberEvent) message;
nodes.remove(other.member().address());
} else if (message instanceof UnreachableMember) {
UnreachableMember unreachable = (UnreachableMember) message;
nodes.remove(unreachable.member().address());
} else if (message instanceof ReachableMember) {
ReachableMember reachable = (ReachableMember) message;
if (reachable.member().hasRole("compute"))
nodes.add(reachable.member().address());
} else {
unhandled(message);
}