JMX入门之StandardMBean HelloWord

（作者原创，可以任意转载请注明出处）

http://blog.csdn.net/zmxj

这个简单的Mbean只有一个属性和一个方法，StardBeanDemoMain 为调用类，
main方法中调用下面三个方法，代码中都有详细的注释：
 sbean.doRegistBean();
        sbean.doManageBean();
        sbean.regHtmlAdaptor();

运行后，可以看到控制台打印的信息，
register StandMbean sucess..
Attribute:state -init value
Attribute:state 2 -new state
My service start.....

由于启动了HtmlAdaptor的服务，所以程序一直处于运行状态，（HtmlAdaptor是sun jmx实现自带的一个适配器）测试可以在浏览器中访问：
http://localhost:8082 就可以在浏览器中管理mbean了，在List of MBean operations下面按startService 按钮，可以看到控制台打出的信息，说明startService方法被调用了。Jdk1.4下需要jmxri.jar和jmxtools.jar两个包，Jdk50已经包括了Jmx的api。

/**
 * Mbean接口
 * StandBeanMBean.java
 * @author zmxj
 */
public interface StandBeanMBean {
   
    public String getState() ;
   
    public void setState(String s) ;
   
    public void startService();
}

/**
 * Mbean实现
 * StandBean.java
 * @author zmxj
 */
public class StandBean implements StandBeanMBean {

    private String state = "init value";
   

    public String getState() {
        return state;
    }

    public void setState(String s) {
        state = s;       
    }

    public void startService() {
       System.out.println("My service start.....");       
    }

}

import javax.management.Attribute;
import javax.management.AttributeNotFoundException;
import javax.management.InstanceNotFoundException;
import javax.management.InvalidAttributeValueException;
import javax.management.MBeanException;
import javax.management.MBeanServer;
import javax.management.MBeanServerFactory;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import javax.management.ReflectionException;

import com.sun.jdmk.comm.HtmlAdaptorServer;

/**
 * Agent类
 * StardBeanDemoMain.java
 * @author zmxj
 */
public class StardBeanDemoMain {

    private MBeanServer mBserver = null;
   
    ObjectName mbeanObjectName = null;
 String domain = null;
 String mbeanName = "StandBean";
 
    public static void main(String[] args) {
       
        StardBeanDemoMain sbean = new StardBeanDemoMain();
       
        sbean.doRegistBean();
        sbean.doManageBean();
        sbean.regHtmlAdaptor();
    }
   
    /**
     * 创建MBeanServer并注册一个Mbean
     */
    private void doRegistBean()
    {
        //创建MBeanServer
        mBserver = MBeanServerFactory.createMBeanServer();
        domain = mBserver.getDefaultDomain();

     try {
         mbeanObjectName = new ObjectName(domain + ":type=" + mbeanName);
        
         /*
         //这里可以直接创建并且同时注册一个mbean到MBeanServer.
         server.createMBean(mbeanName,mbeanObjectName);
         */
        
         StandBean bean = new StandBean();
         mBserver.registerMBean(bean, mbeanObjectName);
        
         System.out.println("register StandMbean sucess..");
     } catch(MalformedObjectNameException e) {
         e.printStackTrace();
         System.exit(1);
     } catch(Exception e){
         e.printStackTrace();
         System.exit(1);
     }
     
    }

    /*
     * 演示管理mbean，通过mbserver修改mbean的属性和执行mbean的方法
     */
    private void doManageBean()
    {
        try {
            ObjectName mbeanObjectName = new ObjectName(domain + ":type=" + mbeanName);
                      
            System.out.println("Attribute:state -"+mBserver.getAttribute(mbeanObjectName,"State"));

            //修改属性State
            Attribute stateAttribute = new Attribute("State","new state");
            mBserver.setAttribute(mbeanObjectName, stateAttribute);
           
            //取得属性值
            System.out.println("Attribute:state 2 -"+mBserver.getAttribute(mbeanObjectName,"State"));
           
            //调用方法startService
            mBserver.invoke(mbeanObjectName,"startService",null,null);
           
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
   
    /*
     * 注册HtmlAdaptor，注册后可以通过http://localhost:8082执行mbean管理操作
     */
    private void regHtmlAdaptor()
    {
     HtmlAdaptorServer html = new HtmlAdaptorServer();
     ObjectName html_name = null;
     try {
         html_name = new ObjectName("Adaptor:name=html,port=8082");
         mBserver.registerMBean(html, html_name);
     } catch(Exception e) {
         System.out.println("/t!!! Could not create the HTML adaptor !!!");
         e.printStackTrace();
         return;
     }
     html.start();
    }
}