JMX 入门学习-(1)创建一个MBean

JMX是java 管理扩展的简称，主要是为系统的管理提供一套有效的机制，我使用jmx主要是为开发中一些需要系统配置的地方提供热部署的功能。这只是我的简单理解。也希望大家能给我多提批评意见，帮助我提高自己的知识水平。

 使用JMX比较简单，首先到Sun 主页上下载JMX的参考实现。http://java.sun.com/products/JavaManagement/download.html

第一步：写一个MBean 它与普通的Bean 基本上没有什么区别。不过一定要用MBean结尾.

/**

**用接口来定义Bean,然后用一个类来实现

**/

public interface HelloWorldMBean {
 public String sayHello (String inputString);
 public String getState();
 public void setState(String state);
}

public class HelloWorld implements HelloWorldMBean {
 private String state="run";
 public String getState() {
  // TODO Auto-generated method stub
  return state;
 }

 public String sayHello(String inputString) {
  // TODO Auto-generated method stub
  return "hello"+inputString;
 }

 public void setState(String state) {
  // TODO Auto-generated method stub
  this.state=state;
 }

}

 import java.io.IOException;

import javax.management.InstanceAlreadyExistsException;
import javax.management.MBeanException;
import javax.management.MBeanRegistrationException;
import javax.management.MBeanServer;
import javax.management.MBeanServerFactory;
import javax.management.MalformedObjectNameException;
import javax.management.NotCompliantMBeanException;
import javax.management.ObjectName;
import javax.management.ReflectionException;

public class MServer {
 public static void main(String arg[]){

  
        MBeanServer mbs = MBeanServerFactory.createMBeanServer();
      
     String domain = mbs.getDefaultDomain();
    
     String mbeanClassName = "HelloWorld";
     String mbeanObjectNameStr = domain + ":type=" + mbeanClassName + ",index=1";
    
     ObjectName mbeanObjectName = createSimpleMBean(mbs, mbeanClassName, mbeanObjectNameStr);
    
    
 }

 private static ObjectName createSimpleMBean(MBeanServer mbs, String mbeanClassName, String mbeanObjectNameStr) {
  // TODO Auto-generated method stub
  ObjectName mbeanObjectName = null;
  try {
   mbeanObjectName =
     ObjectName.getInstance(mbeanObjectNameStr);
   
    mbs.createMBean(mbeanClassName, mbeanObjectName);
  } catch (MalformedObjectNameException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (NullPointerException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (InstanceAlreadyExistsException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (MBeanRegistrationException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (NotCompliantMBeanException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (ReflectionException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (MBeanException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  
  return mbeanObjectName;
 }

 
}