Calling a MBean from the server side.

[sturiot]

Hi all,

I would like to know which is the best approach to call a MBean from a component server like an EJB or another MBean. Should I use the RMIAdaptor ? Does the RMIAdaptor have optimizing calls (ref calls) when we are in the same VM ?

Or is there another road ... I haven't found anything about how MBeans communicate with each others in the source of JBOSS. (Due certainly to the fact that I'm a newbie !)

Thanks a lot
Seb.

[thammoud]

This is what we do and it works well for us.

public static Object getMBean(String name) {
try {
ObjectName myBeanContainerName = new ObjectName(name);
Object myParams[] = { myBeanContainerName };
String mySig[] = {"javax.management.ObjectName"};

MBeanServer myServer = (MBeanServer) MBeanServerFactory.findMBeanServer(null).get(0);

MBeanEntry myContainerEntry = (MBeanEntry)myServer.invoke(new ObjectName("JMImplementation:type=MBeanRegistry"),
"get",
myParams,
mySig);

mbean = myContainerEntry.getResourceInstance();

// Handle XMBeans
if (mbean instanceof XMBean) {
XMBean xmBean = (XMBean)mbean;
mbean = xmBean.getResource();
}
return mbean;
}
catch(Throwable e) {
throw new RuntimeException(e);
}
}

[guy_rouillier]

Why is all that necessary? If all you want to do is invoke an MBean from within an EJB or another MBean, you can just do a simple lookup on the MBean, right?