DynamicMBeanExample.java 文件源码

public static void main(String[] args) throws Exception
{
   // Let's create the MBeanServer
   MBeanServer server = MBeanServerFactory.newMBeanServer();

   // Let's create a dynamic MBean and register it
   DynamicService serviceMBean = new DynamicService();
   ObjectName serviceName = new ObjectName("examples", "mbean", "dynamic");
   server.registerMBean(serviceMBean, serviceName);

   // Now let's register a Monitor
   // We would like to know if we have peaks in activity, so we can use JMX's
   // GaugeMonitor
   GaugeMonitor monitorMBean = new GaugeMonitor();
   ObjectName monitorName = new ObjectName("examples", "monitor", "gauge");
   server.registerMBean(monitorMBean, monitorName);

   // Setup the monitor: we want to be notified if we have too many clients or too less
   monitorMBean.setThresholds(new Integer(8), new Integer(4));
   // Setup the monitor: we want to know if a threshold is exceeded
   monitorMBean.setNotifyHigh(true);
   monitorMBean.setNotifyLow(true);
   // Setup the monitor: we're interested in absolute values of the number of clients
   monitorMBean.setDifferenceMode(false);
   // Setup the monitor: link to the service MBean
   monitorMBean.addObservedObject(serviceName);
   monitorMBean.setObservedAttribute("ConcurrentClients");
   // Setup the monitor: a short granularity period
   monitorMBean.setGranularityPeriod(50L);
   // Setup the monitor: register a listener
   monitorMBean.addNotificationListener(new NotificationListener()
   {
      public void handleNotification(Notification notification, Object handback)
      {
         System.out.println(notification);
      }
   }, null, null);
   // Setup the monitor: start it
   monitorMBean.start();

   // Now start also the service
   serviceMBean.start();
}