public class

ActivationID

extends Object
implements Serializable
java.lang.Object
   ↳ java.rmi.activation.ActivationID

Class Overview

Activation makes use of special identifiers to denote remote objects that can be activated over time. An activation identifier (an instance of the class ActivationID) contains several pieces of information needed for activating an object:

  • a remote reference to the object's activator (a RemoteRef instance), and
  • a unique identifier (a UID instance) for the object.

An activation identifier for an object can be obtained by registering an object with the activation system. Registration is accomplished in a few ways:

  • via the Activatable.register method
  • via the first Activatable constructor (that takes three arguments and both registers and exports the object, and
  • via the first Activatable.exportObject method that takes the activation descriptor, object and port as arguments; this method both registers and exports the object.

See Also

Summary

Public Constructors
ActivationID(Activator activator)
The constructor for ActivationID takes a single argument, activator, that specifies a remote reference to the activator responsible for activating the object associated with this identifier.
Public Methods
Remote activate(boolean force)
Activate the object for this id.
boolean equals(Object obj)
Compares two activation ids for content equality.
int hashCode()
Returns a hashcode for the activation id.
[Expand]
Inherited Methods
From class java.lang.Object

Public Constructors

public ActivationID (Activator activator)

The constructor for ActivationID takes a single argument, activator, that specifies a remote reference to the activator responsible for activating the object associated with this identifier. An instance of ActivationID is globally unique.

Parameters
activator reference to the activator responsible for activating the object

Public Methods

public Remote activate (boolean force)

Activate the object for this id.

Parameters
force if true, forces the activator to contact the group when activating the object (instead of returning a cached reference); if false, returning a cached value is acceptable.
Returns
  • the reference to the active remote object
Throws
ActivationException if activation fails
UnknownObjectException if the object is unknown
RemoteException if remote call fails

public boolean equals (Object obj)

Compares two activation ids for content equality. Returns true if both of the following conditions are true: 1) the unique identifiers equivalent (by content), and 2) the activator specified in each identifier refers to the same remote object.

Parameters
obj the Object to compare with
Returns
  • true if these Objects are equal; false otherwise.
See Also

public int hashCode ()

Returns a hashcode for the activation id. Two identifiers that refer to the same remote object will have the same hash code.

Returns
  • a hash code value for this object.
See Also