Skip to Main Content
Java Management Extensions
book

Java Management Extensions

by J. Steven Perry
June 2002
Intermediate to advanced content levelIntermediate to advanced
312 pages
9h 18m
English
O'Reilly Media, Inc.
Content preview from Java Management Extensions

Controlling MBean Registration

There are times when it is necessary to perform certain activities before and after an MBean is registered and deregistered. Implementing the MBeanRegistration interface provides an MBean with four opportunities (i.e., callbacks) to perform additional processing. The MBeanRegistration interface is defined as:

public interface MBeanRegistration {
  
  public ObjectName preRegister(MBeanServer server, ObjectName name)
    throws java.lang.Exception;
  
  public void postRegister(Boolean registrationDone);
  
  public void preDeregister(  )
    throws java.lang.Exception;
  
  public void postDeregister(  );
}

Another advantage of implementing this interface is that the MBean itself can generate its own object name in preRegister( ) , which is invoked prior to registering the MBean. The first opportunity an MBean has to perform any additional processing is in preRegister( ), which takes two parameters. The first parameter, server , is a reference to the MBean server in which the MBean will be registered, allowing an MBean to maintain a reference to its MBean server. The second parameter, name , is the object name of the MBean. The specification does not mention anything about the behavior of this method, other than that it is invoked prior to an MBean being registered. However, looking through the RI, it is clear that the designers of JMX intended that if the name parameter is null, the MBean will generate its own object name. Otherwise, name is returned unchanged.

Once the MBean ...

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

JMX: Managing J2EE with Java™ Management Extensions

JMX: Managing J2EE with Java™ Management Extensions

Juha Lindfors
Java™ and JMX: Building Manageable Systems

Java™ and JMX: Building Manageable Systems

Heather Kreger, Ward Harold, Leigh Williamson

Publisher Resources

ISBN: 0596002459Supplemental ContentCatalog PageErrata