JMX的简单回顾

最新推荐文章于 2025-11-25 01:29:45 发布

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本文通过实例介绍如何利用Java Management Extensions (JMX)进行远程监控。包括MBean接口定义、资源变化通知机制、MBean服务器配置及客户端调用流程。

之前有了解过JMX，工作中有时候也在用，但是啥东西不系统的学一下，你的内心是空虚的，因此这两天整了整。就放些代码吧，和JMX规范的架构图把。

JMX 架构图:

JMX架构图

package com.blackbeans.example.mbeans;

/**
 * Mbean接口
 * @author blackbeans
 *
 */
public interface GunMBean {
	
	public void aimAndShoot(String[] targetName);
}

package com.blackbeans.example.mbeans;
import javax.management.AttributeChangeNotification;
import javax.management.NotificationBroadcasterSupport;

/**
 * 实现的Mbean,即所谓的JMX Resources
 * 
 * @author blackbeans
 * 
 */
public class Gun extends NotificationBroadcasterSupport implements GunMBean {

	private String gunModel;

	public Gun(String gunModel) {
		this.gunModel = gunModel;
	}

	@Override
	public void aimAndShoot(String[] targetNames){
		
		for(String targetName : targetNames ){
		System.out.println(gunModel + "aim at "+ targetName +" !");
		
		try {
			Thread.sleep(2000);
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
		
		System.out.println(gunModel + " fire !");
		}
		
		AttributeChangeNotification notification = new AttributeChangeNotification(this, 0, 0L, "Gun shot!", null, null, null, null);

		sendNotification(notification);
		
	}
}

为了监控MBean的值变，JMX 的Agent Level有提供基于java 事件的Notification机制可以通知其他的JMX当前的资源发生了变更。JMX 的Agent Level提供了Monitor服务并通知所有的Listener。

package com.blackbeans.example.mbeans;

import javax.management.Notification;
import javax.management.NotificationListener;

public class GunFiredNotificationListener implements NotificationListener {

	@Override
	public void handleNotification(Notification notification, Object handback) {
		System.out.println("notifyInfo:\t"+notification+"\n handback:\t"+handback);

	}

}

MBServer

package com.blackbeans.example.mbeans;
import java.io.IOException;
import java.lang.management.ManagementFactory;
import java.net.MalformedURLException;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;

import javax.management.MBeanServer;
import javax.management.ObjectName;
import javax.management.remote.JMXConnectorServer;
import javax.management.remote.JMXConnectorServerFactory;
import javax.management.remote.JMXServiceURL;

public class MyMBeanServer {
	
	private MBeanServer mbServer;
	
	public MyMBeanServer()
	{
		this.mbServer = ManagementFactory.getPlatformMBeanServer();
		try {
			Registry reg = LocateRegistry.createRegistry(9999);
			for(String bind : reg.list()){
				System.out.println(bind);
			}
			JMXServiceURL url = new JMXServiceURL("service:jmx:rmi:///jndi/rmi://192.168.1.101:9999/MBServer");
			JMXConnectorServer connector = JMXConnectorServerFactory.newJMXConnectorServer(url, null, mbServer);
			connector.start();
		} catch (MalformedURLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}

	
	public void registerMBean(String objectName,Object obj)
	{
		ObjectName objName = null;
		try {
			objName = new ObjectName(objectName);
			this.mbServer.registerMBean(obj, objName);
			this.mbServer.addNotificationListener(objName, new GunFiredNotificationListener(), null, null);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	
	public static void main(String[] args) throws InterruptedException {
		Gun gun = new Gun("AK-47");
		MyMBeanServer myServer = new MyMBeanServer();
		myServer.registerMBean(gun.getClass().getPackage().getName() + ":name="+gun.getClass().getSimpleName(), gun);
		Thread.sleep(100000);
	}
}

MBeanClient

package com.blackbeans.example.mbeans;
import java.io.IOException;
import java.net.MalformedURLException;

import javax.management.InstanceNotFoundException;
import javax.management.MBeanException;
import javax.management.MBeanServerConnection;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import javax.management.ReflectionException;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXServiceURL;


public class MyMBeanClient{
	
	
	private MBeanServerConnection connection;
	public MyMBeanClient(String jmxUrl)
	{
		JMXServiceURL url = null;
		try {
			url = new JMXServiceURL(jmxUrl);
			JMXConnector connector = JMXConnectorFactory.connect(url);
			connector.connect();
			 this.connection = connector.getMBeanServerConnection();
			
		} catch (MalformedURLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
	
	public void invokeMethod(ObjectName objName,String opName ,Object[] paras,String[] signature)
	{
		
		
		try {
			this.connection.invoke(objName, opName, paras, signature);
			
		} catch (InstanceNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (MBeanException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (ReflectionException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
	public static void main(String[] args) {
			 
		String[] gunTypes = new String[]{"AK-47","M16"}; 
		
		MyMBeanClient client = new MyMBeanClient("service:jmx:rmi:///jndi/rmi://192.168.1.101:9999/MBServer");
		
		try {
			ObjectName objName = new ObjectName("com.blackbeans.example.mbeans:name=Gun");
			Object[] parameters = new Object[]{gunTypes};
			String[] signatures = new String[]{"[Ljava.lang.String;"};
			client.invokeMethod(objName, "aimAndShoot", parameters, signatures);
			
		} catch (MalformedObjectNameException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (NullPointerException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}
}

我的例子使用的JMX的RMI方式调用，当然你也可以选择使用本地方式或者使用Sun的 HtmlJmxAdapter 来完成JMX调用或者不用客户端直接使用jconsol连接上去调用即可.

reference:

http://java.sun.com/developer/technicalArticles/J2SE/jmx.html