compact2, compact3
java.rmi.activation
Class ActivationID
- java.lang.Object
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- java.rmi.activation.ActivationID
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- All Implemented Interfaces:
- Serializable
public class ActivationID extends Object implements Serializable
Activation makes use of special identifiers to denote remote objects that can be activated over time. An activation identifier (an instance of the classActivationID) contains several pieces of information needed for activating an object:- a remote reference to the object's activator (a
RemoteRefinstance), and - a unique identifier (a
UIDinstance) for the object.
An activation identifier for an object can be obtained by registering an object with the activation system. Registration is accomplished in a few ways:
- via the
Activatable.registermethod - via the first
Activatableconstructor (that takes three arguments and both registers and exports the object, and - via the first
Activatable.exportObjectmethod that takes the activation descriptor, object and port as arguments; this method both registers and exports the object.
- Since:
- 1.2
- See Also:
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Activatable, Serialized Form
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Constructor Summary
Constructors Constructor and Description ActivationID(Activator activator)The constructor forActivationIDtakes a single argument, activator, that specifies a remote reference to the activator responsible for activating the object associated with this identifier.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method and Description Remoteactivate(boolean force)Activate the object for this id.booleanequals(Object obj)Compares two activation ids for content equality.inthashCode()Returns a hashcode for the activation id.
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Constructor Detail
ActivationID
public ActivationID(Activator activator)
The constructor forActivationIDtakes a single argument, activator, that specifies a remote reference to the activator responsible for activating the object associated with this identifier. An instance ofActivationIDis globally unique.- Parameters:
-
activator- reference to the activator responsible for activating the object - Throws:
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UnsupportedOperationException- if and only if activation is not supported by this implementation - Since:
- 1.2
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Method Detail
activate
public Remote activate(boolean force) throws ActivationException, UnknownObjectException, RemoteException
Activate the object for this id.- Parameters:
-
force- if true, forces the activator to contact the group when activating the object (instead of returning a cached reference); if false, returning a cached value is acceptable. - Returns:
- the reference to the active remote object
- Throws:
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ActivationException- if activation fails -
UnknownObjectException- if the object is unknown -
RemoteException- if remote call fails - Since:
- 1.2
hashCode
public int hashCode()
Returns a hashcode for the activation id. Two identifiers that refer to the same remote object will have the same hash code.
equals
public boolean equals(Object obj)
Compares two activation ids for content equality. Returns true if both of the following conditions are true: 1) the unique identifiers equivalent (by content), and 2) the activator specified in each identifier refers to the same remote object.
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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.
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