Calling EJB on specific node from EJB on another node

Question

Hello,
In cluster environment what is the best approach to call session bean on one node from session bean on another node? The scenario would allow synchronization of local cache (singleton) between two nodes. I understand that there are other options like SingletonService, distributed cache etc., but I wonder how hard would be to implement synchronization calls between nodes on remote session beans.
Thanks
Greg K.

Answer 1

Hi,
Based on your query on thread i can suggestthe following as a best option: Re: replica-aware stub.
Use the JMX code to get the Cluster details....It means the name of the Cluster members and their Listen port and Listen Addresses then in your Client code do the following:
InitialContext ic = getInitialContext(“t3://ClusterMemberOne:7002,ClusterMemberTwo:7003″);Like that whatever InitialContext object you will get will be able to provide you the correct EJB from any newly added member of the Cluster as well..
You can enhance the JMX code mentioned in the following link : http://middlewaremagic.com/weblogic/?p=210 you will need to add only 2-3 lines to make it work for your requirement.
Just tweak the following code to get the ListenPort and ListenAddress of cluster Nodes:
public void printClusterInfo() throws Exception
     ObjectName[] serverRT = getServerRuntimes();
     Hashtable server_states = new Hashtable();
     for(ObjectName ser: serverRT)
          server_states.put((String) connection.getAttribute(ser,”Name”), (String) connection.getAttribute(ser,”State”));
     }Thanks
Jay SenSharma