com.sun.jini.phoenix
Class InstantiatorAccessExporter

java.lang.Object
  extended by com.sun.jini.phoenix.InstantiatorAccessExporter
All Implemented Interfaces:
Exporter

public class InstantiatorAccessExporter
extends Object
implements Exporter

Exporter that wraps an ActivationInstantiator instance so that it only accepts calls from the local host.

Since:
2.0
Author:
Sun Microsystems, Inc.

Constructor Summary
InstantiatorAccessExporter()
          Creates an exporter with an underlying JrmpExporter that exports on an anonymous port.
InstantiatorAccessExporter(Exporter exporter)
          Creates an exporter with the specified underlying exporter.
 
Method Summary
 Remote export(Remote impl)
          Wraps the specified remote object in an ActivationInstantiator implementation that only accepts calls from the local host before delegating to the specified remote object, exports the wrapper with the underlying exporter, and returns the resulting proxy.
 boolean unexport(boolean force)
          Unexports the remote object that was exported by this Exporter such that it will no longer receive remote method invocations that were made possible as a result of exporting it with this Exporter.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

InstantiatorAccessExporter

public InstantiatorAccessExporter()
Creates an exporter with an underlying JrmpExporter that exports on an anonymous port.


InstantiatorAccessExporter

public InstantiatorAccessExporter(Exporter exporter)
Creates an exporter with the specified underlying exporter.

Parameters:
exporter - the underlying exporter
Method Detail

export

public Remote export(Remote impl)
              throws ExportException
Wraps the specified remote object in an ActivationInstantiator implementation that only accepts calls from the local host before delegating to the specified remote object, exports the wrapper with the underlying exporter, and returns the resulting proxy. The wrapper is strongly referenced by this exporter. For the newInstance method, the wrapper throws an AccessControlException if the client is not calling from the local host.

Specified by:
export in interface Exporter
Parameters:
impl - a remote object to export
Returns:
a proxy for the remote object
Throws:
IllegalArgumentException - if impl does not implement ActivationInstantiator
NullPointerException - if impl is null
IllegalStateException - if an object has already been exported with this Exporter instance
ExportException - if a problem occurs exporting the object

unexport

public boolean unexport(boolean force)
Description copied from interface: Exporter
Unexports the remote object that was exported by this Exporter such that it will no longer receive remote method invocations that were made possible as a result of exporting it with this Exporter. The unexport operation may not occur if the force argument is false. This method must only be invoked after the export method has been invoked on this Exporter instance to export a remote object successfully.

This method returns true if upon return, the remote object is no longer exported with this Exporter, and false if the remote object remains exported with this Exporter. This method will always return true if it has returned true previously.

The force parameter serves to indicate whether or not the caller desires the unexport to occur even if there are known remote calls pending or in progress to the remote object that were made possible by this Exporter:

If the remote object is unexported as a result of this method, then the implementation may (and should, if possible) prevent remote calls in progress from being able to communicate their results successfully.

Specified by:
unexport in interface Exporter
Parameters:
force - if true, the remote object will be unexported even if there are remote calls pending or in progress; if false, the remote object may only be unexported if there are no known remote calls pending or in progress
Returns:
true if the remote object is unexported when this method returns and false otherwise
Throws:
IllegalStateException - if an object has not been exported with this Exporter instance


Copyright 2007, multiple authors.
Licensed under the Apache License, Version 2.0, see the NOTICE file for attributions.