// xmlBlaster/demo/HelloWorld8.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.def.Constants;
import org.xmlBlaster.util.qos.address.Destination;
/**
* Shows the request/reply pattern.
* <p />
* A sender and a receiver client connect to xmlBlaster,
* the sender sends a request message to the receiver and blocks until a reply arrives.
* The receiver responds with a reply message.
* <p />
* Invoke: java HelloWorld8
* <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 HelloWorld8
{
private static Logger log = Logger.getLogger(HelloWorld8.class.getName());
private I_XmlBlasterAccess sender = null;
private final String senderName = "TheDesperate";
private I_XmlBlasterAccess receiver = null;
private final String receiverName = "TheKnowing";
public HelloWorld8(final Global glob) {
try {
{ // setup the sender client ...
sender = glob.getXmlBlasterAccess();
ConnectQos qos = new ConnectQos(sender.getGlobal(), senderName, "secret");
ConnectReturnQos conRetQos = sender.connect(qos, null); // Login to xmlBlaster
log.info("Sender connected to xmlBlaster " + conRetQos.getSessionName().getRelativeName());
}
{ // setup the receiver client which processes the request (usually another process) ...
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(receiverName+": Receiving asynchronous message '" + updateKey.getOid() + "' in receiver default handler");
log.info(receiverName+": Received: " + updateKey.toXml() + "\n <content>" + new String(content) + "</content>" + updateQos.toXml());
if (updateKey.isInternal()) return "";
if (updateQos.isErased()) return "";
try {
String tempTopicOid = updateQos.getClientProperty(Constants.JMS_REPLY_TO, ""); // __jms:JMSReplyTo
log.info(receiverName+": Got request, using topic '" + tempTopicOid + "' for response");
// Send reply back ...
PublishKey pk = new PublishKey(receiver.getGlobal(), tempTopicOid, "text/plain", "1.0");
PublishQos pq = new PublishQos(receiver.getGlobal());
MsgUnit msgUnit = new MsgUnit(pk, "On doubt no ultimate truth, my dear.", pq);
//try { Thread.sleep(8000); } catch (InterruptedException e) { e.printStackTrace(); }
PublishReturnQos retQos = receiver.publish(msgUnit);
log.info(receiverName+": Published reply message using temporary topic " + retQos.getKeyOid());
}
catch (XmlBlasterException e) {
log.severe(receiverName+": Sending reply 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' and block for the reply
PublishKey pk = new PublishKey(sender.getGlobal(), "requestForEnlightenment");
PublishQos pq = new PublishQos(sender.getGlobal());
pq.addDestination(new Destination(new SessionName(sender.getGlobal(), receiverName)));
MsgUnit msgUnit = new MsgUnit(pk, "Tell me the truth!", pq);
MsgUnit[] replies = sender.request(msgUnit, 6000, 1);
if (replies.length > 0)
log.info(senderName+": Got " + replies.length + " reply :\n" + replies[0].toXml());
else
log.severe(senderName+": Missing reply message.");
}
catch (XmlBlasterException e) {
log.severe("We have a problem: " + e.getMessage());
}
finally {
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 HelloWorld8 -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("Example: java HelloWorld8\n");
System.exit(1);
}
new HelloWorld8(glob);
}
}