Class ActivationDesc

Constructor Detail

• ActivationDesc

  public ActivationDesc(String className,
                String location,
                MarshalledObject<?> data)
                 throws ActivationException

  Constructs an object descriptor for an object whose class name is className, that can be loaded from the code location and whose initialization information is data. If this form of the constructor is used, the groupID defaults to the current id for ActivationGroup for this VM. All objects with the same ActivationGroupID are activated in the same VM.

  Note that objects specified by a descriptor created with this constructor will only be activated on demand (by default, the restart mode is false). If an activatable object requires restart services, use one of the ActivationDesc constructors that takes a boolean parameter, restart.

  This constructor will throw ActivationException if there is no current activation group for this VM. To create an ActivationGroup use the ActivationGroup.createGroup method.

  Parameters:

  className - the object's fully package qualified class name

  location - the object's code location (from where the class is loaded)

  data - the object's initialization (activation) data contained in marshalled form.

  Throws:

  ActivationException - if the current group is nonexistent

  Since:

  1.2

• ActivationDesc

  public ActivationDesc(String className,
                String location,
                MarshalledObject<?> data,
                boolean restart)
                 throws ActivationException

  Constructs an object descriptor for an object whose class name is className, that can be loaded from the code location and whose initialization information is data. If this form of the constructor is used, the groupID defaults to the current id for ActivationGroup for this VM. All objects with the same ActivationGroupID are activated in the same VM.

  This constructor will throw ActivationException if there is no current activation group for this VM. To create an ActivationGroup use the ActivationGroup.createGroup method.

  Parameters:

  className - the object's fully package qualified class name

  location - the object's code location (from where the class is loaded)

  data - the object's initialization (activation) data contained in marshalled form.

  restart - if true, the object is restarted (reactivated) when either the activator is restarted or the object's activation group is restarted after an unexpected crash; if false, the object is only activated on demand. Specifying restart to be true does not force an initial immediate activation of a newly registered object; initial activation is lazy.

  Throws:

  ActivationException - if the current group is nonexistent

  Since:

  1.2

• ActivationDesc

  public ActivationDesc(ActivationGroupID groupID,
                String className,
                String location,
                MarshalledObject<?> data)

  Constructs an object descriptor for an object whose class name is className that can be loaded from the code location and whose initialization information is data. All objects with the same groupID are activated in the same Java VM.

  Note that objects specified by a descriptor created with this constructor will only be activated on demand (by default, the restart mode is false). If an activatable object requires restart services, use one of the ActivationDesc constructors that takes a boolean parameter, restart.

  Parameters:

  groupID - the group's identifier (obtained from registering ActivationSystem.registerGroup method). The group indicates the VM in which the object should be activated.

  className - the object's fully package-qualified class name

  location - the object's code location (from where the class is loaded)

  data - the object's initialization (activation) data contained in marshalled form.

  Throws:

  IllegalArgumentException - if groupID is null

  Since:

  1.2

• ActivationDesc

  public ActivationDesc(ActivationGroupID groupID,
                String className,
                String location,
                MarshalledObject<?> data,
                boolean restart)

  Constructs an object descriptor for an object whose class name is className that can be loaded from the code location and whose initialization information is data. All objects with the same groupID are activated in the same Java VM.

  Parameters:

  groupID - the group's identifier (obtained from registering ActivationSystem.registerGroup method). The group indicates the VM in which the object should be activated.

  className - the object's fully package-qualified class name

  location - the object's code location (from where the class is loaded)

  data - the object's initialization (activation) data contained in marshalled form.

  restart - if true, the object is restarted (reactivated) when either the activator is restarted or the object's activation group is restarted after an unexpected crash; if false, the object is only activated on demand. Specifying restart to be true does not force an initial immediate activation of a newly registered object; initial activation is lazy.

  Throws:

  IllegalArgumentException - if groupID is null

  Since:

  1.2

Method Detail

• getGroupID

  public ActivationGroupID getGroupID()

  Returns the group identifier for the object specified by this descriptor. A group provides a way to aggregate objects into a single Java virtual machine. RMI creates/activates objects with the same groupID in the same virtual machine.

  Returns:

  the group identifier

  Since:

  1.2

• getClassName

  public String getClassName()

  Returns the class name for the object specified by this descriptor.

  Returns:

  the class name

  Since:

  1.2

• getLocation

  public String getLocation()

  Returns the code location for the object specified by this descriptor.

  Returns:

  the code location

  Since:

  1.2

• getData

  public MarshalledObject<?> getData()

  Returns a "marshalled object" containing intialization/activation data for the object specified by this descriptor.

  Returns:

  the object specific "initialization" data

  Since:

  1.2

• getRestartMode

  public boolean getRestartMode()

  Returns the "restart" mode of the object associated with this activation descriptor.

  Returns:

  true if the activatable object associated with this activation descriptor is restarted via the activation daemon when either the daemon comes up or the object's group is restarted after an unexpected crash; otherwise it returns false, meaning that the object is only activated on demand via a method call. Note that if the restart mode is true, the activator does not force an initial immediate activation of a newly registered object; initial activation is lazy.

  Since:

  1.2

• equals

  public boolean equals(Object obj)

  Compares two activation descriptors for content equality.

  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

• hashCode

  public int hashCode()

  Return the same hashCode for similar ActivationDescs.

  Overrides:

  hashCode in class Object

  Returns:

  an integer

  See Also:

  Hashtable