tomcat 7 源码分析-7 server初始化中的JMX(DynamicMBean)再续

tomcat 7 源码分析-7 server初始化中的JMX(DynamicMBean)再续

 

这里说下tomcat对DynamicMBean的实现和封装。利用tomcat包，可以轻松实现将自己的对象注册为MBeans。

看个例子就明白了。

 package  com.MBean.test;

 import  org.apache.tomcat.util.modeler.BaseNotificationBroadcaster;

 public   class  DyMBeanObj  extends  BaseNotificationBroadcaster{

     public   int  getConnectionNumber() {
         return   this .conNum ;
         }

         public   synchronized   void  setConnectionNumber( int  con_Num ) {

         this .conNum = con_Num ;

         System.out.println("Connection Number now "  +  this .conNum );
         }
         private   int  conNum = DEFAULT_CON_Num;
         private   static   final   int  DEFAULT_CON_Num=  20 ;

 }

package com.MBean.test;

import org.apache.tomcat.util.modeler.BaseNotificationBroadcaster;

public class DyMBeanObj extends BaseNotificationBroadcaster{
	
    public int getConnectionNumber() { 
    	return this.conNum ; 
        } 
     
        public synchronized void setConnectionNumber(int con_Num ) {

    	this.conNum = con_Num ; 
     
    	System.out.println("Connection Number now " + this.conNum ); 
        } 
        private int conNum = DEFAULT_CON_Num;
        private static final int DEFAULT_CON_Num= 20; 

}

 

 package  com.MBean.test;
 import  javax.management.*;

 import  org.apache.tomcat.util.modeler.Registry;

 public   class  DyMBeanTest {

     /**
      * @param args
      */
     public   static   void  main(String[] args)  throws  Exception{
         // TODO Auto-generated method stub
         DyMBeanObj obj = new  DyMBeanObj(); //将这个Object-->动态MBean
         ObjectName on = null ;
         on = new  ObjectName( "com.MBeans:type=test" ); //此MBean的域和类型
         Registry.getRegistry(null ,  null ).registerComponent(obj, on,  null );
         System.out.println("Waiting for incoming requests..." );
         Thread.sleep(Long.MAX_VALUE);
     }

 }

package com.MBean.test;
import javax.management.*;

import org.apache.tomcat.util.modeler.Registry;

public class DyMBeanTest {

	/**
	 * @param args
	 */
	public static void main(String[] args) throws Exception{
		// TODO Auto-generated method stub
		DyMBeanObj obj = new DyMBeanObj();//将这个Object-->动态MBean
		ObjectName on = null;
		on = new ObjectName("com.MBeans:type=test");//此MBean的域和类型		
		Registry.getRegistry(null, null).registerComponent(obj, on, null);	
		System.out.println("Waiting for incoming requests...");  
		Thread.sleep(Long.MAX_VALUE);  
	}

}

 查看运行效果，可以直接看上篇文章。

 

不管是DynamicMBean还是StandardMBean，都需要ObjectName，可以利用一串字符构造这个对象。

”com.MBeans:type=test“，其实就是Domain:key=value

 

Registry大大简化了DynamicMBean的调用，讲MBeanServer的create也封装了。