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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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package org.jgroups.demos;

import org.jgroups.*;
import org.jgroups.util.Util;

/** Demos RELAY. Create 2 *separate* clusters with RELAY as top protocol. Each RELAY has bridge_props="tcp.xml" (tcp.xml
 * needs to be present). Then start 2 instances in the first cluster and 2 instances in the second cluster. They should
 * find each other, and typing in a window should send the text to everyone, plus we should get 4 responses.
 * @author Bela Ban
 */
public class RelayDemo {
    public static void main(String[] args) throws Exception {
        String props="udp.xml";
        String name=null;

        for(int i=0; i < args.length; i++) {
            if(args[i].equals("-props")) {
                props=args[++i];
                continue;
            }
            if(args[i].equals("-name")) {
                name=args[++i];
                continue;
            }
            System.out.println("RelayDemo [-props props] [-name name]");
            return;
        }

        final JChannel ch=new JChannel(props);
        if(name != null)
            ch.setName(name);
        ch.setReceiver(new ReceiverAdapter() {
            public void receive(Message msg) {
                Address sender=msg.getSrc();
                System.out.println("<< " + msg.getObject() + " from " + sender);
                Address dst=msg.getDest();
                if(dst == null) {
                    Message rsp=new Message(msg.getSrc(), null, "this is a response");
                    try {
                        ch.send(rsp);
                    }
                    catch(Exception e) {
                        e.printStackTrace();
                    }
                }
            }

            public void viewAccepted(View new_view) {
                System.out.println(print(new_view));
            }
        });

        ch.connect("RelayDemo");

        for(;;) {
            String line=Util.readStringFromStdin(": ");
            ch.send(null, line);
        }
    }


    static String print(View view) {
        StringBuilder sb=new StringBuilder();
        boolean first=true;
        sb.append(view.getClass().getSimpleName() + ": ").append(view.getViewId()).append(": ");
        for(Address mbr: view.getMembers()) {
            if(first)
                first=false;
            else
                sb.append(", ");
            sb.append(mbr);
        }
        return sb.toString();
    }
}