Package Summary  Overview Summary

class:ActivationID [NONE]
All Implemented Interfaces:
Serializable 
public class ActivationID
extends Object
implements Serializable
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.

Since:
1.2
See Also:
Activatable, Serialized Form

constructor:ActivationID(java.rmi.activation.Activator) [NONE]

  • ActivationID

    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
    Throws:
    UnsupportedOperationException - if and only if activation is not supported by this implementation
    Since:
    1.2

method:activate(boolean) [NONE]

  • activate

    public Remote activate​(boolean force) throws ActivationException, UnknownObjectException, RemoteException
    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
    Since:
    1.2
    		•

    method:hashCode() [NONE]

    hashCode

    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.
    Overrides:
    hashCode in class Object
    Returns:
    a hash code value for this object.
    Since:
    1.2
    See Also:
    Hashtable

    method:equals(java.lang.Object) [NONE]

    equals

    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.
    Overrides:
    equals in class Object
    Parameters:
    obj - the Object to compare with
    Returns:
    true if these Objects are equal; false otherwise.
    Since:
    1.2
    See Also:
    Hashtable

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