import org.jboss.system.ServiceMBeanSupport;
public class HelloWorldService extends ServiceMBeanSupport implements HelloWorldServiceMBean {
    private String message;
    public String getMessage() {
        System.out.println("getMessage()=" + message);
        return message;
    }

    public void setMessage(String message) {
        System.out.println("setMessage(" + message + ")");
        this.message = message;
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<server>
    <mbean code="example.mbean.HelloWorldService" name="www.chengang.com.cn:service=HelloWorld">
        <attribute name="Message">Hello World</attribute>
    </mbean>
</server>

void callGo();

    public void callGo() {
        new Client().go();
    }

七、作者简介

陈刚，广西桂林人，著作有《Eclipse从入门到精通》
您可以通过其博客了解更多信息和文章：http://www.chenGang.com.cn

作者简介

陈刚，广西桂林人，著作有《Eclipse从入门到精通》
您可以通过其博客了解更多信息和文章：http://www.chenGang.com.cn

package mbean.modelbean;

import mbean.standard.HelloMBean;

public class Hello implements HelloMBean {
    private String name;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public void printHello() {
        System.out.println("Hello World, " + name);
    }
    public void printHello(String whoName) {
        System.out.println("Hello , " + whoName);
    }
}

<?xml version="1.0"?>
<mbeans-descriptors>
 <mbean name="Hello" description="the hello bean" domain="chengang" group="helloGroup" type="mbean.modelbean.Hello">
  <attribute name="name" description="a name attribute" type="java.lang.String" writeable="true"/>
  <operation name="printHello" description="a operation to print hello" impact="INFO" returnType="String"/>
 </mbean>
</mbeans-descriptors> 

package mbean.modelbean;

import java.io.InputStream;
import javax.management.MBeanServer;
import javax.management.ObjectName;
import javax.management.modelmbean.ModelMBean;
import org.apache.commons.modeler.ManagedBean;
import org.apache.commons.modeler.Registry;
import com.sun.jdmk.comm.HtmlAdaptorServer;

public class HelloAgent {
    public static void main(String[] args) throws Exception {
        //基于xml中的信息构建一个Registry
        Registry registry = Registry.getRegistry(null, null);
        InputStream stream = HelloAgent.class.getResourceAsStream("Mbeans-descriptors.xml");
        registry.loadMetadata(stream);
        stream.close();
        //由Registry得到一个MBeanServer
        MBeanServer server = registry.getMBeanServer();

        //得到Hello在描述文件中的信息类，对应于xml文件<mbean>标签的name属性。
        ManagedBean managed = registry.findManagedBean("Hello");
        //创建ObjectName
        ObjectName helloName = new ObjectName(managed.getDomain() + ":name=HelloWorld");
        //得到ModelMBean
        ModelMBean hello = managed.createMBean(new Hello());
        //注册MBean
        server.registerMBean(hello, helloName);

        ObjectName adapterName = new ObjectName("HelloAgent:name=htmladapter,port=8082");
        HtmlAdaptorServer adapter = new HtmlAdaptorServer();
        server.registerMBean(adapter, adapterName);
        adapter.start();
        System.out.println("start.....");
    }
}

Registry registry = Registry.getRegistry(null, null);
InputStream stream = HelloAgent.class.getResourceAsStream("Mbeans-descriptors.xml");
registry.loadMetadata(stream);
stream.close();

作者简介

陈刚，广西桂林人，著作有《Eclipse从入门到精通》
您可以通过其博客了解更多信息和文章：http://www.chenGang.com.cn

import java.lang.reflect.Constructor;
import java.util.Iterator;
import javax.management.Attribute;
import javax.management.AttributeList;
import javax.management.DynamicMBean;
import javax.management.MBeanAttributeInfo;
import javax.management.MBeanConstructorInfo;
import javax.management.MBeanException;
import javax.management.MBeanInfo;
import javax.management.MBeanNotificationInfo;
import javax.management.MBeanOperationInfo;
import javax.management.MBeanParameterInfo;
import javax.management.ReflectionException;

/**
 * @author Sunny Peng
 * @author change by Chen.Gang, add a feature for dynamic add operation
 * @version 1.0
 */
public class HelloDynamic implements DynamicMBean {
    //这是我们的属性名称
    private String name;
    private MBeanInfo mBeanInfo = null;
    private String className;
    private String description;
    private MBeanAttributeInfo[] attributes;
    private MBeanConstructorInfo[] constructors;
    private MBeanOperationInfo[] operations;
    MBeanNotificationInfo[] mBeanNotificationInfoArray;

    public HelloDynamic() {
        init();
        buildDynamicMBean();
    }

    private void init() {
        className = this.getClass().getName();
        description = "Simple implementation of a dynamic MBean.";
        attributes = new MBeanAttributeInfo[1];
        constructors = new MBeanConstructorInfo[1];
        operations = new MBeanOperationInfo[1];
        mBeanNotificationInfoArray = new MBeanNotificationInfo[0];
    }

    private void buildDynamicMBean() {
        //设定构造函数
        Constructor[] thisconstructors = this.getClass().getConstructors();
        constructors[0] = new MBeanConstructorInfo("HelloDynamic(): Constructs a HelloDynamic object", thisconstructors[0]);
        //设定一个属性
        attributes[0] = new MBeanAttributeInfo("Name", "java.lang.String", "Name: name string.", true, true, false);
        //operate method 我们的操作方法是print
        MBeanParameterInfo[] params = null;//无参数
        operations[0] = new MBeanOperationInfo("print", "print(): print the name", params, "void", MBeanOperationInfo.INFO);
        mBeanInfo = new MBeanInfo(className, description, attributes, constructors, operations, mBeanNotificationInfoArray);
    }

    //动态增加一个print1方法
    private void dynamicAddOperation() {
        init();
        operations = new MBeanOperationInfo[2];//设定数组为两个
        buildDynamicMBean();
        operations[1] = new MBeanOperationInfo("print1", "print1(): print the name", null, "void", MBeanOperationInfo.INFO);
        mBeanInfo = new MBeanInfo(className, description, attributes, constructors, operations, mBeanNotificationInfoArray);
    }

    public Object getAttribute(String attribute_name) {
        if (attribute_name != null)
            return null;
        if (attribute_name.equals("Name"))
            return name;
        return null;
    }

    public void setAttribute(Attribute attribute) {
        if (attribute == null)
            return;
        String Name = attribute.getName();
        Object value = attribute.getValue();
        try {
            if (Name.equals("Name")) {
                // if null value, try and see if the setter returns any exception
                if (value == null) {
                    name = null;
                    // if non null value, make sure it is assignable to the attribute
                } else if ((Class.forName("java.lang.String")).isAssignableFrom(value.getClass())) {
                    name = (String) value;
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public AttributeList getAttributes(String[] attributeNames) {
        if (attributeNames == null)
            return null;
        AttributeList resultList = new AttributeList();
        // if attributeNames is empty, return an empty result list
        if (attributeNames.length == 0)
            return resultList;
        for (int i = 0; i < attributeNames.length; i++) {
            try {
                Object value = getAttribute(attributeNames[i]);
                resultList.add(new Attribute(attributeNames[i], value));
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return resultList;
    }

    public AttributeList setAttributes(AttributeList attributes) {
        if (attributes == null)
            return null;
        AttributeList resultList = new AttributeList();
        // if attributeNames is empty, nothing more to do
        if (attributes.isEmpty())
            return resultList;
        // for each attribute, try to set it and add to the result list if successfull
        for (Iterator i = attributes.iterator(); i.hasNext();) {
            Attribute attr = (Attribute) i.next();
            try {
                setAttribute(attr);
                String name = attr.getName();
                Object value = getAttribute(name);
                resultList.add(new Attribute(name, value));
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return resultList;
    }

    public Object invoke(String operationName, Object params[], String signature[]) throws MBeanException, ReflectionException {
        // Check for a recognized operation name and call the corresponding operation
        if (operationName.equals("print")) {
            //具体实现我们的操作方法print 
            System.out.println("Hello, " + name + ", this is HellDynamic!");
            dynamicAddOperation();
            return null;
        } else if (operationName.equals("print1")) {
            System.out.println("这是动态增加的一方法print1");
            return null;
        } else {
            // unrecognized operation name:
            throw new ReflectionException(new NoSuchMethodException(operationName), "Cannot find the operation " + operationName + " in " + className);
        }

    }

    public MBeanInfo getMBeanInfo() {
        return mBeanInfo;
    }
}

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("chengang:name=HelloDynamic");
        HelloDynamic hello = new HelloDynamic();
        server.registerMBean(hello, helloName);
        ObjectName adapterName = new ObjectName("HelloAgent:name=htmladapter,port=8082");
        HtmlAdaptorServer adapter = new HtmlAdaptorServer();
        server.registerMBean(adapter, adapterName);
        adapter.start();
        System.out.println("start.....");
    }
}

import javax.management.Notification;
import javax.management.NotificationBroadcasterSupport;

public class Jack extends NotificationBroadcasterSupport implements JackMBean {
    private int seq = 0;
    public void hi() {
        Notification n = new Notification(//创建一个信息包
                "jack.hi",//给这个Notification起个名称
                this, //由谁发出的Notification
                ++seq,//一系列通知中的序列号,可以设任意数值
                System.currentTimeMillis(),//发出时间
                "Jack");//发出的消息文本
        //发出去
        sendNotification(n);
    }
}

/**
 * @author ChenGang 2005-12-3
 */
public class Hello implements HelloMBean {
    private String name;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public void printHello() {
        System.out.println("Hello World, " + name);
    }
    public void printHello(String whoName) {
        System.out.println("Hello , " + whoName);
    }
}

/**
 * @author ChenGang 2005-12-3
 */
public interface HelloMBean {
    public String getName();
    public void setName(String name);
    public void printHello();
    public void printHello(String whoName);
} 

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("chengang:name=HelloWorld");
        server.registerMBean(new Hello(), helloName);

        ObjectName adapterName = new ObjectName("HelloAgent:name=htmladapter,port=8082");
        HtmlAdaptorServer adapter = new HtmlAdaptorServer();
        server.registerMBean(adapter, adapterName);

        adapter.start();
        System.out.println("start.....");




    }
} 

• 先创建了一个MBeanServer，用来做MBean的容器
• 将Hello这个类注入到MBeanServer中，注入需要创建一个ObjectName类
• 创建一个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。
• chengang:name=HelloWorld的名字是有一定规则的，格式为：“域名:name=MBean名称”，域名和MBean名称都可以任意取。