table of Contents

I. INTRODUCTION

Glossary JMX Java Management Extensions, the Java Management Extensions.

What to do

Management application, to view the device information, see the application resources, monitoring changes in resources

Calls in

Support cross-platform, multi-protocol (soap, http, html, snmp, jconsole)

Second, the historical changes

Drafts	JSR No.	theme	description	Whether to enable	status	the reason	Submitters
14 Dec, 1998	3	JMX 1.1和1.2	JMX specification developed for the Web, distributed, dynamic and modular programs, provide management architecture	Yes	Undo	In Java 5.2 version has become the trademark of Oracle Corporation	Sun MicrosystemsConsumer & EmbeddedEmbedded System Software Group
30 May,2000	70	JMX adaptation IIOP protocol	IIOP protocol specification established based adapter to support CORBA clients to access the JMX agent	no	Undo	Corporate strategy adjustment, not optimistic about JMX application in CORBA client	IONA Technologies PlcBen Beazley
27 Jun, 2000	71	JMX-TMN definitions	Between the normative Telecommunications Management Network (TMN) and JMX Interoperability	no	Undo	The person in charge should be standardized to withdraw, JSR3 already mentioned this support, but have not been realized	Bull S.A. (BullSoft)
21 Aug, 2001	146	JMX support WBem Service	Definition provides protocol adapter for WBEM Services	no	Undo	JSR48 WBEN standard service by WBEN Solutions, Inc. presented. The two companies made this specification, a year and a half later, to stop cooperation	Sun Microsystems, Inc.
27 Nov, 2001	160	JMX Remote API call	The API extends the JMX1.2API, providing remote access to JMX MBean servers.	Yes	Undo	The same reason jsr3	Sun Microsystems，Inc.
21 Sep, 2004	255	JMX 2.0	Update JMX and JMX Remote API. Improve the availability of existing features and add new features.	no	Undo	Corporate strategy adjustment	Sun Microsystems，Inc.
07 Dec, 2004	262	JMX to support Web Services connection	JMX support the definition of Web Services support for non-Java clients.	Yes	Undo	Corporate strategy adjustment	Sun Microsystems，Inc.

JMX technology can be seen completely dominated by the Sun, no new specifications have been proposed after the acquisition. Only the sun actually enabled the company submitted 3,160,262.

Third, the sample code

Specifically management applications, view device information, view the application resource, monitor resource changes, how these achieve it?

Defined interfaces

//接口名必须以MBean结尾
public interface HelloMBean {
    String getName();

    void setName(String name);

    void printHello();
}

Implementation class

//类名必须和接口MBean前的内容相同，即类名+MBean必须等于接口名
public class Hello extends NotificationBroadcasterSupport implements HelloMBean {
    private AtomicLong sequenceNumber = new AtomicLong(1);
    private String name;

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

    @Override
    public String getName() {
        return name;
    }

    @Override
    public void setName(String name) {
        String oldName = this.name;
        this.name = name;
        //通知方法
        Notification notification = new AttributeChangeNotification(this,
                sequenceNumber.getAndIncrement(),
                System.currentTimeMillis(),
                AttributeChangeNotification.ATTRIBUTE_CHANGE,
                "Name Change",
                "java.lang.String",
                oldName + "",
                this.name + "");
        super.sendNotification(notification);
    }
}

Main method

public class StandardMBeanMain {
    public static void main(String[] args) throws Exception {
        MBeanServer mBeanServer = ManagementFactory.getPlatformMBeanServer();
        ObjectName objName = new ObjectName("MBeanTest2:type=StandardMBean");
        mBeanServer.registerMBean(new Hello(), objName);
        mBeanServer.addNotificationListener(objName, new HelloListener(), null, null);
        Thread.sleep(60 * 60 * 1000);
    }
}

Listener class

public class HelloListener implements NotificationListener {
    @Override
    public void handleNotification(Notification notification, Object handback) {
        log("SequenceNumber:" + notification.getSequenceNumber());
        log("Type:" + notification.getType());
        log("Message:" + notification.getMessage());
        log("Source:" + notification.getSource());
        log("TimeStamp:" + notification.getTimeStamp());
        log("UserData:" + notification.getUserData());
        log("oldValue:" + ((AttributeChangeNotification)notification).getOldValue());
        log("newValue" + ((AttributeChangeNotification)notification).getNewValue());
        log("attributeName:" + ((AttributeChangeNotification)notification).getAttributeName());
        log("=========" + notification.toString());
    }

    private void log(String message) {
        System.out.println(message);
    }
}

jconsole connection example

ObjectName("MBeanTest2:type=StandardMBean")

View bean attribute information, and support to modify bean properties by the method set

operational support void method invocation

monitor Notificationcontents of the statement