Class ActivationGroupDesc
- java.lang.Object
-
- java.rmi.activation.ActivationGroupDesc
-
- All Implemented Interfaces:
- Serializable
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 ofActivationGroup
is created/recreated via theActivationGroup.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:
- 1.2
- See Also:
-
ActivationGroup
,ActivationGroupID
, Serialized Form
-
-
Nested Class Summary
Nested Classes Modifier and Type Class and Description static class
ActivationGroupDesc.CommandEnvironment
Startup options for ActivationGroup implementations.
-
Constructor Summary
Constructors Constructor and Description 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.
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method and Description boolean
equals(Object obj)
Compares two activation group descriptors for content equality.String
getClassName()
Returns the group's class name (possiblynull
).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 similarActivationGroupDesc
s.
-
-
-
Constructor Detail
ActivationGroupDesc
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 benull
to accept rmid's default.This constructor will create an
ActivationGroupDesc
with anull
group class name, which indicates the system's defaultActivationGroup
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 (ornull
). - Since:
- 1.2
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 package qualified class name ornull
. Anull
group class name indicates the system's defaultActivationGroup
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), ornull
. -
cmd
- the controlling options for executing the VM in another process (ornull
). - Since:
- 1.2
-
Method Detail
getClassName
public String getClassName()
Returns the group's class name (possiblynull
). Anull
group class name indicates the system's defaultActivationGroup
implementation.- Returns:
- the group's class name
- Since:
- 1.2
getLocation
public String getLocation()
Returns the group's code location.- Returns:
- the group's code location
- Since:
- 1.2
getData
public MarshalledObject<?> getData()
Returns the group's initialization data.- Returns:
- the group's initialization data
- Since:
- 1.2
getPropertyOverrides
public Properties getPropertyOverrides()
Returns the group's property-override list.- Returns:
-
the property-override list, or
null
- Since:
- 1.2
getCommandEnvironment
public ActivationGroupDesc.CommandEnvironment getCommandEnvironment()
Returns the group's command-environment control object.- Returns:
-
the command-environment object, or
null
- Since:
- 1.2
equals
public boolean equals(Object obj)
Compares two activation group descriptors for content equality.
-
Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
Copyright © 1993, 2022, Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.