Programmatically flush JBoss 4.2.2 connection pool - jboss

Question

I'm running JBoss 4.2.2. I'm trying to determine the correct code to both:
Lookup the org.jboss.resource.connectionmanager.JBossManagedConnectionPool
Perform a flush() operation on said pool.
I've found a couple other questions out there with no answers. I'm hoping this doesn't become yet another one of them.
The closest question I've found so far: https://community.jboss.org/message/637784

Answer 1

Here's the basics using a quickie groovy example.
First, you want jboss-4.2.2/client/jbossall-client.jar in your classpath.
Next, you need the JMX ObjectName of the data source. It may be helpful to find this in the JMX Console at http://localhost:8080/jmx-console/ or however you have deployed. So the string value of the ObjectName is the domain + ":" + the properties.
For example:
The ObjectName is: jboss.jca:name=DefaultDS,service=ManagedConnectionPool.
Next, look up the RMIAdaptor in JNDI. This is the MBeanServer interfac that will allow you to invoke the flush operation on the target MBean. Then call the invocation. That's it.
import javax.management.*;
import javax.naming.*;
p = new Properties();
p.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");
p.put(Context.PROVIDER_URL, "localhost:1099");
ctx = new InitialContext(p);
rmiAdaptor = ctx.lookup("jmx/rmi/RMIAdaptor");
rmiAdaptor.invoke(new ObjectName("jboss.jca:name=DefaultDS,service=ManagedConnectionPool"), "flush", [] as Object[], [] as String[]);
Make sense ?
===== Update =====
If you are executing this from inside the JBoss JVM, you don't need the JNDI setup:
import javax.management.*;
import org.jboss.mx.util.MBeanServerLocator;
MBeanServer server = MBeanServerLocator.locateJBoss();
server.invoke(new ObjectName("jboss.jca:name=DefaultDS,service=ManagedConnectionPool"), "flush", [] as Object[], [] as String[]);