// 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);
}
}