JBossJmxSampler.java

/*
 * Copyright 2015-2017 JKOOL, LLC.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.jkoolcloud.tnt4j.stream.jmx.impl;

import java.lang.management.ManagementFactory;
import java.lang.reflect.Method;

import javax.management.MBeanServer;
import javax.management.MBeanServerConnection;

/**
 * <p>
 * This class provides scheduled execution and sampling of JMX metrics for a JBoss Application Server
 * {@code MBeanServer} instance.
 * </p>
 * 
 * 
 * @version $Revision: 1 $
 * 
 * @see PlatformJmxSampler
 */
public class JBossJmxSampler extends PlatformJmxSampler {
	public static final String JBOSS_JMX_ADMIN_CLASS = "org.jboss.mx.util.MBeanServerLocator";

	/**
	 * Dynamically identify and load JBoss MBean Server {@code org.jboss.mx.util.MBeanServerLocator.locate()}. Use
	 * {@code ManagementFactory.getPlatformMBeanServer()} if none found.
	 * 
	 * @return JBoss JMX MBean server instance
	 */
	protected static MBeanServer getAdminServer() {
		try {
			Class<?> adminClass = Class.forName(JBOSS_JMX_ADMIN_CLASS);
			Method mserverMethod = adminClass.getMethod("locate", (Class<?>) null);
			if (mserverMethod != null) {
				return (MBeanServer) mserverMethod.invoke(null);
			}
		} catch (Throwable ex) {
			ex.printStackTrace();
		}
		return ManagementFactory.getPlatformMBeanServer();
	}

	/**
	 * Create an instance with JBoss MBean Server instance
	 */
	protected JBossJmxSampler() {
		super(getAdminServer());
	}

	/**
	 * Create a default instance with a given MBean server instance
	 * 
	 * @param mServerConn MBean server connection instance
	 */
	protected JBossJmxSampler(MBeanServerConnection mServerConn) {
		super(mServerConn);
	}
}