Lookup Singleton MBean

[niefeng]

Hi all,

I followed the configuration as specified on the OnJava.com (http://www.onjava.com/pub/a/onjava/2003/08/20/jboss_clustering.html) to configure a singleton MBean within the cluster env.

However, i have problem on locating the singleton MBean. Below is my excerpt of my code on getting the mbean.

String mbeanName = mbeanName = getServiceMBeanName();
 MBeanServer server = MBeanServerLocator.locate();
 AServiceMBean mbean = (AServiceMBean)MBeanProxyExt.create(AServiceMBean.class, mbeanName, server);
 System.out.println("is Master node: "+mbean.isMasterNode());

The isMasterNode status will be true if the mbean is started as the singleton.

On node 1, i tried to run the code and the above code stated it is a master node. On node 2, i tried the same thing, but i can't locate the singleton MBean cos the status i get is showng false.

Seem like the MBean i am getting is from the Node2 MBeanServer instead of the Node1 mbean server.

Is the way i perform the look up wrongly?

Many thanks

[niefeng]

Ops, forgot to mention the jboss version i am running. The version is 4.05 GA.

The following is the mbean configuration file

<mbean code="test.ASingletonService"
 name="jboss.test:service=ASingleton">
 </mbean>

 <mbean code="org.jboss.ha.singleton.HASingletonController"
 name="jboss:service=HASingletonControllerMBean">
 <depends>jboss.test:service=ASingleton</depends>
 <depends>jboss.ha:service=HASingletonDeployer,type=Barrier</depends>
 <attribute name="TargetName">jboss.test:service=ASingleton</attribute>
 <attribute name="TargetStartMethod">startASingleton</attribute>
 <attribute name="TargetStopMethod">stopASingleton</attribute>
 </mbean>

Thanks !

[niefeng]

Hi all,

I have searched the answer in the jboss clustering forum, thanks