findMBeanServer

[marcvh]

Hi,

I'm new to JBoss and I am using version 3.0.7.
I have the following problem.
The file jbossmq_state.xml contains all users that are allowed to subscribe to or publish on a JMS topic. I would like to manage those users programmatically and I thought that the DynamicStateManager would allow me to do so.

Here's the code I used:
ObjectName smObjectName = new ObjectName("jboss.mq:service=StateManager");
// Lookup the state manager.
List srvrList = MBeanServerFactory.findMBeanServer(null);
System.out.println(srvrList.size());
MBeanServer server =(MBeanServer)srvrList.iterator().next();
System.out.println(server.getMBeanCount().toString());
DynamicStateManager sm = (DynamicStateManager)server.getAttribute( smObjectName, "Instance");

The problem with this code is that findMBeanServer returns an empty list.

JBoss is running on my machine and the same program can publish messages, so I know that JMS works.

Can anyone give me hint?

Best regards,

Marc Vanhoecke
Project Leader
B. Rekencentra N.V.

[adrian.brock]

Use the RMIAdaptor outside the virtual machine.
You can see it in jndi.

Regards,
Adrian

[marcvh]

I modified the code and I'm now using the RMIAdaptor:

// Lookup the state manager.
InitialContext ic = new InitialContext();
RMIAdaptor server = (RMIAdaptor)ic.lookup("jmx/rmi/RMIAdaptor");
ObjectName smObjectName = new ObjectName("jboss.mq:service=StateManager");
DynamicStateManager sm = (DynamicStateManager)server.getAttribute( smObjectName, "Instance");

now I get this exception:

java.rmi.UnmarshalException: error unmarshalling return; nested exception is:
java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: org.jboss.mq.sm.file.DynamicStateManager

jndi.Properties looks like this:
java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory
java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces
# Do NOT uncomment this line as it causes in VM calls to go over
# RMI!
java.naming.provider.url=localhost

What's wrong here?

Marc.

[adrian.brock]

It is an MBean use invoke and get/setAttrbitue.

The Instance attribute is for the internal use of JBossMQ.

Regards,
Adrian

[marcvh]

It works now.

Thanks!

If I need to do the same thing from within a bean, do I use the same code or do I use the code I used before? (findMBeanServer etc.)

[marcvh]

This code works from within a bean:

// Add role_id to jbossmq_state.xml using DynamicStateManager
ObjectName smObjectName = new ObjectName("jboss.mq:service=StateManager");
// Lookup the state manager.
List srvrList = MBeanServerFactory.findMBeanServer(null);
MBeanServer server =(MBeanServer)srvrList.iterator().next();
DynamicStateManager sm = (DynamicStateManager)server.getAttribute( smObjectName, "Instance");

So my problem is solved.

Thanks for the hints!

Regards,

Marc vanhoecke
Project Leader
B. Rekencentra NV