I am trying to catch the Notification from the JBoss Server in a Servlet. I want to
know when JBoss is completely initialized and started (I am using 3.2.3 and tomcat).
Sometimes I can add the listener and sometimes I cannot. Sometimes it says the Server
is not registered but how can this be when I always see the Server startup
notification in the logs:
>From the JBoss logs, here is where the Server would send the notification:
10:23:11,094 INFO [Server] JBoss (MX MicroKernel) [3.2.3 (build: CVSTag=JBoss_3_2_3
date=200311301445)] Started in 42s:33ms
Here is an example of when it could not add the listener
Mar 25, 2004 10:14:49
FINEST: Problem initializing JBoss startup Listener jboss.system:type=Server is not
registered.
Here is an example of the same code successfully adding the listener
Mar 25, 2004 10:23:09 AM
INFO: Finished initializing JBoss startup Listener
Mar 25, 2004 10:23:11 AMINFO: Received JBoss initialized
notification=javax.management.Notification[source=jboss.system:type=Server,
type=org.jboss.system.server.started,sequenceNumber=1,timeStamp=1080238991094,
message=null,userData=42033]
This is how I add the listener in a Servlet:
import javax.management.MBeanServer;
import javax.management.MBeanServerFactory;
import javax.management.MBeanServerNotification;
import javax.management.Notification;
import javax.management.NotificationFilterSupport;
import javax.management.NotificationListener;
import javax.management.ObjectName;
import org.jboss.system.server.Server;
<STUFF DELETED>
server = (MBeanServer)
MBeanServerFactory.findMBeanServer(null).iterator().next();
listener = new MyNotificationListener();
object = new ObjectName("jboss.system:type=Server");
filter = new NotificationFilterSupport();
filter.enableType(Server.START_NOTIFICATION_TYPE);
try {
// if you wanted to find out about register/unregister, use
//new ObjectName("JMImplementation:type=MBeanServerDelegate"),
// we are interested in the start/stop of jboss only, use
// "jboss.system:type=Server"
server.addNotificationListener(
object, listener, filter, null);
// listener set to true when Jboss Server notification received
JBossStarted = false;
logger.log(java.util.logging.Level.INFO,
"Finished initializing JBoss startup Listener");
}
catch (Exception listenerProblem) {
logger.log(java.util.logging.Level.FINEST,
"Problem initializing JBoss startup Listener" +
listenerProblem.getMessage());
}
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