当前页面: 在线文档首页 > JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class ActivationGroupDesc - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

Overview  Package   Class  Use  Tree  Deprecated  Index  Help		JavaTM 2 Platform Standard Edition
PREV CLASS   NEXT CLASS	FRAMES    NO FRAMES
SUMMARY:  INNER | FIELD | CONSTR | METHOD	DETAIL:  FIELD | CONSTR | METHOD

---

java.rmi.activation
Class ActivationGroupDesc

java.lang.Object
  |
  +--java.rmi.activation.ActivationGroupDesc

---

public final class ActivationGroupDesc

extends Object

implements Serializable

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)

Since:

JDK1.2

See Also:

ActivationGroup, ActivationGroupID, Serialized Form

---

Inner Class Summary
static class	ActivationGroupDesc.CommandEnvironment           Startup options for ActivationGroup implementations.

 

Constructor Summary

ActivationGroupDesc(Properties overrides, ActivationGroupDesc.CommandEnvironment cmd)           Constructs a group descriptor that uses system default 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.

 

Method Summary
boolean	equals(Object obj)           Compares two activation group descriptors for content equality.
String	getClassName()           Returns the group's class name.
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.

 

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

 

Constructor Detail

ActivationGroupDesc

public ActivationGroupDesc(Properties overrides,
                           ActivationGroupDesc.CommandEnvironment cmd)

Constructs a group descriptor that uses system default 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.

Parameters:

properties - the set of properties to set when the group is recreated.

cmd - the controlling options for executing the VM in another process (or null).

Since:

JDK1.2

---

ActivationGroupDesc

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 fully package qualified className

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).

Since:

JDK1.2

Method Detail

getClassName

public String getClassName()

Returns the group's class name.

Returns:

the group's class name

Since:

JDK1.2

---

getLocation

public String getLocation()

Returns the group's code location.

Returns:

the group's code location

Since:

JDK1.2

---

getData

public MarshalledObject getData()

Returns the group's initialization data.

Returns:

the group's initialization data

Since:

JDK1.2

---

getPropertyOverrides

public Properties getPropertyOverrides()

Returns the group's property-override list.

Returns:

the property-override list, or null

Since:

JDK1.2

---

getCommandEnvironment

public ActivationGroupDesc.CommandEnvironment getCommandEnvironment()

Returns the group's command-environment control object.

Returns:

the command-environment object, or null

Since:

JDK1.2

---

equals

public boolean equals(Object obj)

Compares two activation group 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:

JDK1.2

See Also:

Hashtable

---

hashCode

public int hashCode()

Produce identical numbers for similar ActivationGroupDescs.

Overrides:

hashCode in class Object

Returns:

an integer

See Also:

Hashtable

---

Overview  Package   Class  Use  Tree  Deprecated  Index  Help		JavaTM 2 Platform Standard Edition
PREV CLASS   NEXT CLASS	FRAMES    NO FRAMES
SUMMARY:  INNER | FIELD | CONSTR | METHOD	DETAIL:  FIELD | CONSTR | METHOD

---

Submit a bug or feature
Java, Java 2D, and JDBC are a trademarks or registered trademarks of Sun Microsystems, Inc. in the US and other countries.
Copyright 1993-1999 Sun Microsystems, Inc. 901 San Antonio Road,
Palo Alto, California, 94303, U.S.A. All Rights Reserved.