[jboss-jira] [JBoss JIRA] Created: (EJBTHREE-2234) Clustered @Singleton

[Carlo de Wolf (JIRA)]

Clustered @Singleton
--------------------

                 Key: EJBTHREE-2234
                 URL: https://issues.jboss.org/browse/EJBTHREE-2234
             Project: EJB 3.0
          Issue Type: Feature Request
            Reporter: Carlo de Wolf
             Fix For: TBD EAP 6


It should be possible to create a clustered singleton by just adding the @Clustered annotation.

@Singleton
@Clustered
public class MyScheduler {
}

Care should be taken that the life-cycle callbacks are only invoked once on one node, the other nodes will only receive the state of the singleton after post-construct.

Concurrency management of the singleton should happen cross-cluster, so that a singleton with read lock can be concurrently invoked on any node. After existing a method with a write lock the state must be synchronized across the cluster before new invocations are processed.

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