org.jini.rio.associations
Class AssociationInjector

java.lang.Object
  org.jini.rio.associations.AssociationInjector

All Implemented Interfaces:

AssociationListener

public class AssociationInjector
extends Object
implements AssociationListener

The AssociationInjector is an AssociationListener implementation that provides support for setter-based dependency injection by calling setters on a target object method when it receives association events. For example, we have a bean called Foo and it requires JavaSpace. In order to have the JavaSpace proxy set, a setter method is required :

 public class Foo  {
     JavaSpace myJavaSpace;
 
     ...
     public void setMyJavaSpace(JavaSpace space) {
         myJavaSpace = space; 
     }
     ...
 }
 

Finally, in the OperationalString, you'll need to create an Association with a Property attribute which matches the setter.

Constructor Summary

AssociationInjector(Object target)
Create an AssociationInjector

Method Summary

void	broken(Association association, Object service) Always inject a null if the association is broken
void	changed(Association association, Object service) Get the next service in the collection for injection
void	discovered(Association association, Object service) Notify the AssociationListener that an Association has been discovered

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AssociationInjector

public AssociationInjector(Object target)
                    throws IntrospectionException

Create an AssociationInjector

Parameters:

target - The object which will have dependencies injected

Throws:

IntrospectionException

Method Detail

discovered

public void discovered(Association association,
                       Object service)

Description copied from interface: AssociationListener

Notify the AssociationListener that an Association has been discovered

Specified by:

discovered in interface AssociationListener

Parameters:

association - The Association

service - The associated service that has been discovered

See Also:

AssociationListener.discovered(Association, Object)

changed

public void changed(Association association,
                    Object service)

Get the next service in the collection for injection

Specified by:

changed in interface AssociationListener

Parameters:

association - The Association

service - The service that was removed, changing the endpoint

See Also:

AssociationListener.changed(Association, Object)

broken

public void broken(Association association,
                   Object service)

Always inject a null if the association is broken

Specified by:

broken in interface AssociationListener

Parameters:

association - The Association.

service - The service that was removed, causing the Association to be broken

See Also:

AssociationListener.broken(Association, Object)