7.4.6 The ActivationGroupID Class

The identifier for a registered activation group serves several purposes:

• it identifies the group uniquely within the activation system, and
• it contains a reference to the group's activation system so that the group can contact its activation system when necessary.

The ActivationGroupID is returned from the call to ActivationSystem.registerGroup and is used to identify the group within the activation system. This group identifier is passed as one of the arguments to the activation group's special constructor when an activation group is created/recreated.

package java.rmi.activation;

public class ActivationGroupID implements java.io.Serializable

{

	public ActivationGroupID(ActivationSystem system);



	public ActivationSystem getSystem();



	public boolean equals(Object obj);



	public int hashCode();

}

The ActivationGroupID constructor creates a unique group identifier whose ActivationSystem is system.

The getSystem method returns the activation system for the group.

The hashCode method returns a hashcode for the group's identifier. Two group identifiers that refer to the same remote group will have the same hash code.

The equals method compares two group identifiers for content equality. The method returns true if both of the following conditions are true: 1) the unique identifiers are equivalent (by content), and 2) the activation system specified in each refers to the same remote object.