Clustered Remoting

Clustered AOP Remoting didn't receive much TLC for the 1.0 beta release although we did fix a few critical bugs. We'll put more TLC in the next release

Clustered remoting works a little differently than regular AOP remoting. It leverages the clustering framework implemented for EJBs.

import org.jboss.ha.framework.interfaces.RoundRobin;
...
   POJO remote = new POJO("hello");
   return (POJO)ClusteredRemoting.registerClusteredObject("clusteredobj", remote,
                                                          "DefaultPartition", new RoundRobin(),
                                                          "socket://servername:8084");

Unlike regular AOP remoting, clients cannot independently connect to a clustered object. Here's a look at the API.

package org.jboss.aop.remoting;

import javax.naming.InitialContext;

import org.jboss.aop.Advised;
import org.jboss.aop.InstanceAdvised;
import org.jboss.aop.InstanceAdvisor;
import org.jboss.aop.PayloadKey;
import org.jboss.aop.proxy.ClassProxy;
import org.jboss.aop.proxy.ClassProxyFactory;
import org.jboss.ha.framework.server.HATarget;
import org.jboss.ha.framework.interfaces.HAPartition;
import org.jboss.ha.framework.interfaces.LoadBalancePolicy;
import org.jboss.ha.framework.interfaces.GenericClusteringException;
import org.jboss.ha.framework.interfaces.ClusteringTargetsRepository;
import org.jboss.ha.framework.interfaces.FamilyClusterInfo;
import org.jboss.logging.Logger;
import org.jboss.remoting.InvokerLocator;
import org.jboss.aop.Dispatcher;

public class ClusteredRemoting implements ClusterConstants
{
   public static ClassProxy registerClusteredObject(Object objectId, Object obj, 
                                                    String partitionName, 
                                                    LoadBalancePolicy lb, String uri)
      throws Exception

   public static ClassProxy registerClusteredObject(Object objectId, Object obj, 
                                                    String partitionName, LoadBalancePolicy lb,
                                                    InvokerLocator locator) throws Exception

}

The ClusteredRemoting static methods register with the Dispatcher for you. The partitionName corresponds to the Cluster Partition you want the object to be used with. Pre-implemented load balance policies are RoundRobin and FirstAvailable. See the EJB clustering docs for more information.