/*
* JORAM: Java(TM) Open Reliable Asynchronous Messaging
* Copyright (C) 2008 - ScalAgent Distributed Technologies
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA.
*
* Initial developer(s): ScalAgent Distributed Technologies
* Contributor(s):
*/
package monitoring;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.Vector;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.Session;
import javax.jms.Topic;
import javax.naming.Context;
import javax.naming.InitialContext;
/**
* Consumes messages from the monitoring topic.
*/
public class Monitor {
public static void main(String[] args) throws Exception {
System.out.println();
System.out.println("Listens to the monitoring topic...");
Context ictx = new InitialContext();
Topic topic = (Topic) ictx.lookup("MonitoringTopic");
ConnectionFactory cf = (ConnectionFactory) ictx.lookup("cf");
ictx.close();
Connection cnx = cf.createConnection();
Session sess = cnx.createSession(false, Session.AUTO_ACKNOWLEDGE);
MessageConsumer subs = sess.createConsumer(topic);
subs.setMessageListener(new MonitorMsgListener());
cnx.start();
System.in.read();
cnx.close();
System.out.println();
System.out.println("Consumer closed.");
}
static class MonitorMsgListener implements MessageListener {
public void onMessage(Message message) {
try {
doReport(message);
} catch (JMSException exc) {
exc.printStackTrace();
}
}
}
static int nbmsg = 0;
static void doReport(Message message) throws JMSException {
nbmsg += 1;
System.out.println("\033[2J\n --> Monitoring message received: " + nbmsg);
Vector v = new Vector();
Enumeration enumNames = message.getPropertyNames();
while (enumNames.hasMoreElements()) {
String name = (String) enumNames.nextElement();
v.add(name + " : " + message.getObjectProperty(name));
}
String [] a = new String[v.size()];
v.toArray(a);
Arrays.sort(a);
for (int i=0; i<a.length; i++)
System.out.println(a[i]);
}
}