userclient.java

jmx codeJava源码

package book.jmx.examples;

import javax.management.*;
import java.util.List;

public class UserClient {

   public void run() {

      // Find an agent from this JVM. Null argument will return
      // a list of all MBeanServer instances.
      List srvrList = MBeanServerFactory.findMBeanServer(null);
      MBeanServer server = 
            (MBeanServer)srvrList.iterator().next();
      
      try {
         // register the MBean
         ObjectName name = new ObjectName("example:name=user");
         server.registerMBean(new DynamicUser(), name);
          
         // Invoke the printInfo operation on an
         // uninitialized MBean instance.
         Object result = server.invoke(
                            name,          // MBean name
                            "printInfo",   // operation name
                            null,          // no parameters
                            null           // void signature
                         );
            
         System.out.println("Non-initialized User object:");
         System.out.println(result);
            
         // Create the list of management attribute value pairs
         AttributeList list = new AttributeList();
         list.add(new Attribute("Name", "John"));
         list.add(new Attribute("Address", "Strawberry Street"));
         list.add(new Attribute("PhoneNumbers", new String[]
                                  {
                                   "555-1232",
                                   null,
                                   null
                                  }
                                ));

         // Init the MBean instance by calling setAttributes()
         server.setAttributes(name, list);

         // Invoke the printInfo to retrieve the updated state            
         result = server.invoke(
                           name,          // MBean name
                           "printInfo",   // operation name
                           null,          // no parameters
                           null           // void signature
                         );
    
         System.out.println("Initialized User object:");
         System.out.println(result);
      }
      catch (MalformedObjectNameException e) {
         e.printStackTrace();
      }
      catch (InstanceNotFoundException e) {
         e.printStackTrace();
      }
      catch (MBeanException e) {
         e.getTargetException().printStackTrace();
      }
      catch (ReflectionException e) {
         e.printStackTrace();
      }
      catch (InstanceAlreadyExistsException e) {
          e.printStackTrace();
      }
      catch (NotCompliantMBeanException e) {
          e.printStackTrace();
      }
      catch (RuntimeOperationsException e) {
         e.getTargetException().printStackTrace();
      }
   }

   /**
    * Main method for the client. This will instantiate an agent
    * and register the User MBean to it.
    */
   public static void main(String[] args) {
    
      MBeanServer server =
               MBeanServerFactory.createMBeanServer();
                    
      new UserClient().run();
   }
}