Replace the jbossweb.sar/META-INF/jboss-beans.xml with the attached, and place the JAR file in jbossweb.sar.
Go into your JMX Consult (http://localhost:8080/jmx-console/). You will see com.rhc in the left menu, and a JMX service called: "service=JmxThreadPoolMonitor"
That will expose the following operations:
public int getActiveCount();
public int getCorePoolSize();
public int getMaximumPoolSize();
public int getPoolSize();
public long getTaskCount();
public int getLargestPoolSize();