Java Enterprise in a Nutshell, Second Edition

Name

Unreferenced

Synopsis

If a server object implements this interface, then the unreferenced() method is called by the RMI runtime when the last client reference to a remote object is dropped. A remote object shouldn’t be garbage collected until all of its remote and local references are gone. So the unreferenced() method isn’t a trigger for an object to be finalized, but rather a chance for the remote object to respond appropriately when its client reference count goes to zero. The unreferenced object could, for example, start a timer countdown to move the object to persistent storage after a given idle time with respect to remote clients.

public interface Unreferenced {
// Public Instance Methods
   public abstract void unreferenced();  
}