JMX简单实例

二、简单实例

1.建立一个需要被JMX管理的类Hello

package bcndly.test.jmx;

public class Hello implements HelloMBean {

    private String name;

    public String getName() {
        return name;
    }

    public void printHello() {
        System.out.println("Hello, " + name);
    }

    public void printHello(String theName) {
        System.out.println("Hello, " + theName);
    }

    public void setName(String name) {
        this.name = name;
    }

}

package bcndly.test.jmx;

public class Hello implements HelloMBean {
	
	private String name;

	public String getName() {
		return name;
	}

	public void printHello() {
		System.out.println("Hello, " + name);
	}

	public void printHello(String theName) {
		System.out.println("Hello, " + theName);
	}

	public void setName(String name) {
		this.name = name;
	}

}

2.建立Hello类的MBean接口，接口名必须是要管理的类名+MBean

package bcndly.test.jmx;

public interface HelloMBean {

    public String getName();

    public void setName(String name);

    public void printHello();

    public void printHello(String theName);
}

package bcndly.test.jmx;

public interface HelloMBean {
	
	public String getName();

	public void setName(String name);

	public void printHello();

	public void printHello(String theName);
}

3.创建一个Agent类

package bcndly.test.jmx;

import javax.management.MBeanServer;
import javax.management.MBeanServerFactory;
import javax.management.ObjectName;

import com.sun.jdmk.comm.HtmlAdaptorServer;

public class HelloAgent {

    public static void main(String[] args) throws Exception {
        MBeanServer server = MBeanServerFactory.createMBeanServer();
        ObjectName helloName = new ObjectName("bcndyl:name=HelloWorld");
        server.registerMBean(new Hello(), helloName);
        ObjectName adapterName = new ObjectName("HelloAgent:name=htmladapter,port=8091");
        HtmlAdaptorServer adapter = new HtmlAdaptorServer();
        server.registerMBean(adapter, adapterName);
        adapter.start();
        System.out.println("start.....");
    }

}

package bcndly.test.jmx;

import javax.management.MBeanServer;
import javax.management.MBeanServerFactory;
import javax.management.ObjectName;

import com.sun.jdmk.comm.HtmlAdaptorServer;

public class HelloAgent {

	public static void main(String[] args) throws Exception {
		MBeanServer server = MBeanServerFactory.createMBeanServer();
		ObjectName helloName = new ObjectName("bcndyl:name=HelloWorld");
		server.registerMBean(new Hello(), helloName);
		ObjectName adapterName = new ObjectName("HelloAgent:name=htmladapter,port=8091");
		HtmlAdaptorServer adapter = new HtmlAdaptorServer();
		server.registerMBean(adapter, adapterName);
		adapter.start();
		System.out.println("start.....");
	}

}

说明：

• HtmlAdaptorServer在jmxtools.jar包中，需要到SUN网站下载JMX 1.2.1 Reference Implementation
• MBeanServer是一个包含所有注册MBean的仓库.它是JMX代理层的核心.JMX1.0规范提供一个接口叫 javax.management.MBeanServer. 所有管理的在MBean操作通过MBeanServer执行.使用MBeanServer实例,你能够管理所有MBean.每一个MBean具有一个唯一标志,叫ObjectName.
• ObjectName (javax.management.ObjectName)是一个类,唯一标志一个在MBeanServer的MBean.这个对象名称用于管理应用程序来标志MBean以便操作能够在适当的MBean上被调用.一个对象名称包含两部分：域名称和没有经过排序的一个或者多个关键属性集，语法：[domain name]:property=value[,property=value]
• AdaptorServer，这个类将决定MBean的管理界面，这里用最普通的Html型界面。AdaptorServer其实也是一个MBean
• 运行HelloAgent，打开IE输入就可以看到注册的MBean，在控制台看printHello的输出结果