public final class

ActivationGroupDesc

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

Class Overview

An activation group descriptor contains the information necessary to create/recreate an activation group in which to activate objects. Such a descriptor contains:

  • the group's class name,
  • the group's code location (the location of the group's class), and
  • a "marshalled" object that can contain group specific initialization data.

The group's class must be a concrete subclass of ActivationGroup. A subclass of ActivationGroup is created/recreated via the ActivationGroup.createGroup static method that invokes a special constructor that takes two arguments:

  • the group's ActivationGroupID, and
  • the group's initialization data (in a java.rmi.MarshalledObject)

See Also

Summary

Nested Classes
class ActivationGroupDesc.CommandEnvironment Startup options for ActivationGroup implementations. 
Public Constructors
ActivationGroupDesc(Properties overrides, ActivationGroupDesc.CommandEnvironment cmd)
Constructs a group descriptor that uses the system defaults for group implementation and code location.
ActivationGroupDesc(String className, String location, MarshalledObject<?> data, Properties overrides, ActivationGroupDesc.CommandEnvironment cmd)
Specifies an alternate group implementation and execution environment to be used for the group.
Public Methods
boolean equals(Object obj)
Compares two activation group descriptors for content equality.
String getClassName()
Returns the group's class name (possibly null).
ActivationGroupDesc.CommandEnvironment getCommandEnvironment()
Returns the group's command-environment control object.
MarshalledObject<?> getData()
Returns the group's initialization data.
String getLocation()
Returns the group's code location.
Properties getPropertyOverrides()
Returns the group's property-override list.
int hashCode()
Produce identical numbers for similar ActivationGroupDescs.
[Expand]
Inherited Methods
From class java.lang.Object

Public Constructors

public ActivationGroupDesc (Properties overrides, ActivationGroupDesc.CommandEnvironment cmd)

Constructs a group descriptor that uses the system defaults for group implementation and code location. Properties specify Java environment overrides (which will override system properties in the group implementation's VM). The command environment can control the exact command/options used in starting the child VM, or can be null to accept rmid's default.

This constructor will create an ActivationGroupDesc with a null group class name, which indicates the system's default ActivationGroup implementation.

Parameters
overrides the set of properties to set when the group is recreated.
cmd the controlling options for executing the VM in another process (or null).

public ActivationGroupDesc (String className, String location, MarshalledObject<?> data, Properties overrides, ActivationGroupDesc.CommandEnvironment cmd)

Specifies an alternate group implementation and execution environment to be used for the group.

Parameters
className the group's package qualified class name or null. A null group class name indicates the system's default ActivationGroup implementation.
location the location from where to load the group's class
data the group's initialization data contained in marshalled form (could contain properties, for example)
overrides a properties map which will override those set by default in the subprocess environment (will be translated into -D options), or null.
cmd the controlling options for executing the VM in another process (or null).

Public Methods

public boolean equals (Object obj)

Compares two activation group descriptors for content equality.

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

public String getClassName ()

Returns the group's class name (possibly null). A null group class name indicates the system's default ActivationGroup implementation.

Returns
  • the group's class name

public ActivationGroupDesc.CommandEnvironment getCommandEnvironment ()

Returns the group's command-environment control object.

Returns
  • the command-environment object, or null

public MarshalledObject<?> getData ()

Returns the group's initialization data.

Returns
  • the group's initialization data

public String getLocation ()

Returns the group's code location.

Returns
  • the group's code location

public Properties getPropertyOverrides ()

Returns the group's property-override list.

Returns
  • the property-override list, or null

public int hashCode ()

Produce identical numbers for similar ActivationGroupDescs.

Returns
  • an integer
See Also