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 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:
- 1.2
- See Also:
-
ActivationGroup
,ActivationGroupID
, Serialized Form
Nested Class Summary
Modifier and Type | Class | Description |
---|---|---|
static class | ActivationGroupDesc.CommandEnvironment | Startup options for ActivationGroup implementations. |
Constructor Summary
Constructor | Description |
---|---|
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. |
ActivationGroupDesc(Properties overrides,
ActivationGroupDesc.CommandEnvironment cmd) | Constructs a group descriptor that uses the system defaults for group implementation and code location. |
Method Summary
Modifier and Type | Method | Description |
---|---|---|
boolean | equals(Object obj) | Compares two activation group descriptors for content equality. |
String | getClassName() | Returns the group's class name (possibly |
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 |
Methods declared in 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 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 (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 (possibly null
). A null
group class name indicates the system's default ActivationGroup
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.
- Overrides:
-
equals
in classObject
- 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()
Produce identical numbers for similar ActivationGroupDesc
s.