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Source Code of HelloWorld5

// xmlBlaster/demo/HelloWorld5.java
import java.util.logging.Logger;

import org.xmlBlaster.client.I_Callback;
import org.xmlBlaster.client.I_XmlBlasterAccess;
import org.xmlBlaster.client.key.PublishKey;
import org.xmlBlaster.client.key.UpdateKey;
import org.xmlBlaster.client.qos.ConnectQos;
import org.xmlBlaster.client.qos.ConnectReturnQos;
import org.xmlBlaster.client.qos.DisconnectQos;
import org.xmlBlaster.client.qos.PublishQos;
import org.xmlBlaster.client.qos.PublishReturnQos;
import org.xmlBlaster.client.qos.UpdateQos;
import org.xmlBlaster.util.Global;
import org.xmlBlaster.util.MsgUnit;
import org.xmlBlaster.util.SessionName;
import org.xmlBlaster.util.XmlBlasterException;
import org.xmlBlaster.util.qos.address.Destination;


/**
* A sender and a receiver client connect to xmlBlaster,
* the sender sends a PtP (point to point) message to the receiver
* and the receiver responds with an ACK message.
* <p />
* Invoke: java HelloWorld5
* <p />
* Note: This does not work with our 'email' protocol unless we configure
*       two separate email accounts for each client connection.
* @see <a href="http://www.xmlBlaster.org/xmlBlaster/doc/requirements/interface.html" target="others">xmlBlaster interface</a>
*/
public class HelloWorld5
{
   private static Logger log = Logger.getLogger(HelloWorld5.class.getName());

   private I_XmlBlasterAccess sender = null;
   private final String senderName = "sender";
   private I_XmlBlasterAccess receiver = null;
   private final String receiverName = "receiver";

   public HelloWorld5(final Global glob) {
     
      try {

         {  // setup the sender client ...
            sender = glob.getXmlBlasterAccess();

            ConnectQos qos = new ConnectQos(sender.getGlobal(), senderName, "secret");
            ConnectReturnQos conRetQos = sender.connect(qos, new I_Callback() {
               public String update(String cbSessionId, UpdateKey updateKey, byte[] content, UpdateQos updateQos) {
                  log.info("Receiving asynchronous message '" + updateKey.getOid() + "' in sender default handler" );
                  log.info("Received: " + updateKey.toXml() + "\n <content>" + new String(content) + "</content>" + updateQos.toXml());
                  return "";
               }
            })// Login to xmlBlaster, default handler for updates

            log.info("Sender connected to xmlBlaster " + conRetQos.getSessionName().getRelativeName());
         }


         {  // setup the receiver client ...
            Global globReceiver = glob.getClone(null);
            receiver = globReceiver.getXmlBlasterAccess();

            ConnectQos qos = new ConnectQos(receiver.getGlobal(), receiverName, "secret");
            ConnectReturnQos conRetQos = receiver.connect(qos, new I_Callback() {
               public String update(String cbSessionId, UpdateKey updateKey, byte[] content, UpdateQos updateQos) {
                  log.info("Receiving asynchronous message '" + updateKey.getOid() + "' in receiver default handler");
                  log.info("Received: " + updateKey.toXml() + "\n <content>" + new String(content) + "</content>" + updateQos.toXml());

                  if (updateKey.isInternal()) return "";
                  if (updateQos.isErased()) return "";
                  try {
                     // Send an ACK back ...
                     PublishKey pk = new PublishKey(receiver.getGlobal(), "HelloWorld5:ACK", "text/plain", "1.0");
                     PublishQos pq = new PublishQos(receiver.getGlobal());
                     pq.addDestination(new Destination(updateQos.getSender()));
                     MsgUnit msgUnit = new MsgUnit(pk, "ACK", pq);
                     boolean oneway = false; // just for demo, you can try a variant with never blocking oneway
                     if (oneway) {
                        MsgUnit[] arr = new MsgUnit[1];
                        arr[0] = msgUnit;
                        receiver.publishOneway(arr);
                        log.info("Published message '" + pk.getOid() + "' to " + updateQos.getSender());
                     }
                     else {
                        PublishReturnQos retQos = receiver.publish(msgUnit);
                        log.info("Published message '" + retQos.getKeyOid() + "' to " + updateQos.getSender());
                     }
                  }
                  catch (XmlBlasterException e) {
                     log.severe("Sending ACK to " + updateQos.getSender() + " failed: " + e.getMessage());
                  }
                  return "";
               }
            })// Login to xmlBlaster, default handler for updates

            log.info("Receiver connected to xmlBlaster " + conRetQos.getSessionName().getRelativeName());
         }

         // Send a message to 'receiver'
         PublishKey pk = new PublishKey(sender.getGlobal(), "HelloWorld5", "text/plain", "1.0");
         PublishQos pq = new PublishQos(sender.getGlobal());
         pq.addDestination(new Destination(new SessionName(sender.getGlobal(), receiverName)));
         MsgUnit msgUnit = new MsgUnit(pk, "Hi", pq);
         PublishReturnQos retQos = sender.publish(msgUnit);
         log.info("Published message '" + retQos.getKeyOid() + "' to " + receiverName + ":\n" + msgUnit.toXml());
      }
      catch (XmlBlasterException e) {
         log.severe("Houston, we have a problem: " + e.getMessage());
      }
      finally {
         // Wait a second for messages to arrive before we logout
         try { Thread.sleep(1000); } catch( InterruptedException i) {}
         Global.waitOnKeyboardHit("Success, hit a key to exit");
        
         if (sender != null && sender.isConnected()) { sender.disconnect(new DisconnectQos(sender.getGlobal())); }
         if (receiver != null && receiver.isConnected()) { receiver.disconnect(new DisconnectQos(receiver.getGlobal())); }
      }
   }

   /**
    * Try
    * <pre>
    *   java HelloWorld5 -help
    * </pre>
    * for usage help
    */
   public static void main(String args[]) {
      Global glob = new Global();
     
      if (glob.init(args) != 0) { // Get help with -help
         System.out.println(glob.usage());
         System.out.println("HelloWorld5: Example: java HelloWorld5\n");
         System.exit(1);
      }

      new HelloWorld5(glob);
   }
}
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