java.rmi.server

Class UnicastRemoteObject

Implemented Interfaces:
Remote, Serializable
Known Direct Subclasses:
ActivationGroup, RegistryImpl

public class UnicastRemoteObject
extends RemoteServer

This class obtains stub that communicates with the remote object.
See Also:
Serialized Form

Field Summary

Fields inherited from class java.rmi.server.RemoteObject

ref

Constructor Summary

UnicastRemoteObject()
Create and export new remote object without specifying the port value.
UnicastRemoteObject(int port)
Create and export the new remote object, making it available at the given port, local host.
UnicastRemoteObject(int port, RMIClientSocketFactory clientSocketFactory, RMIServerSocketFactory serverSocketFactory)
Create and export the new remote object, making it available at the given port, using sockets, produced by the specified factories.
UnicastRemoteObject(RemoteRef ref)
Does nothing, delegates to super(ref).

Method Summary

Object
clone()
This method may be called to create a new copy of the Object.
static RemoteStub
exportObject(Remote obj)
Export object, making it available for the remote calls at the anonymous port.
static Remote
exportObject(Remote obj, int port)
Export object, making it available for the remote calls at the specified port.
static Remote
exportObject(Remote obj, int port, RMIClientSocketFactory csf, RMIServerSocketFactory ssf)
FIXME
static boolean
unexportObject(Remote obj, boolean force)

Methods inherited from class java.rmi.server.RemoteServer

getClientHost, getLog, setLog

Methods inherited from class java.rmi.server.RemoteObject

equals, getRef, hashCode, toString, toStub

Methods inherited from class java.lang.Object

clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

UnicastRemoteObject

protected UnicastRemoteObject()
            throws RemoteException
Create and export new remote object without specifying the port value.
Throws:
RemoteException - if the attempt to export the object failed.

UnicastRemoteObject

protected UnicastRemoteObject(int port)
            throws RemoteException
Create and export the new remote object, making it available at the given port, local host.
Parameters:
port - the port, on that the object should become available. Zero means anonymous port.
Throws:
RemoteException - if the attempt to export the object failed.

UnicastRemoteObject

protected UnicastRemoteObject(int port,
                              RMIClientSocketFactory clientSocketFactory,
                              RMIServerSocketFactory serverSocketFactory)
            throws RemoteException
Create and export the new remote object, making it available at the given port, using sockets, produced by the specified factories.
Parameters:
port - the port, on that the object should become available. Zero means anonymous port.
clientSocketFactory - the client socket factory
serverSocketFactory - the server socket factory
Throws:
RemoteException - if the attempt to export the object failed.

UnicastRemoteObject

protected UnicastRemoteObject(RemoteRef ref)
            throws RemoteException
Does nothing, delegates to super(ref).

Method Details

clone

public Object clone()
            throws CloneNotSupportedException
This method may be called to create a new copy of the Object. The typical behavior is as follows:
  • o == o.clone() is false
  • o.getClass() == o.clone().getClass() is true
  • o.equals(o) is true

However, these are not strict requirements, and may be violated if necessary. Of the three requirements, the last is the most commonly violated, particularly if the subclass does not override Object.equals(Object).

If the Object you call clone() on does not implement Cloneable (which is a placeholder interface), then a CloneNotSupportedException is thrown. Notice that Object does not implement Cloneable; this method exists as a convenience for subclasses that do.

Object's implementation of clone allocates space for the new Object using the correct class, without calling any constructors, and then fills in all of the new field values with the old field values. Thus, it is a shallow copy. However, subclasses are permitted to make a deep copy.

All array types implement Cloneable, and override this method as follows (it should never fail):

 public Object clone()
 {
   try
     {
       super.clone();
     }
   catch (CloneNotSupportedException e)
     {
       throw new InternalError(e.getMessage());
     }
 }
 
Overrides:
clone in interface Object
Returns:
a copy of the Object
Throws:
CloneNotSupportedException - If this Object does not implement Cloneable
See Also:
Cloneable

exportObject

public static RemoteStub exportObject(Remote obj)
            throws RemoteException
Export object, making it available for the remote calls at the anonymous port. This method returns the instance of the abstract class, not an interface. Hence it will not work with the proxy stubs that are supported since jdk 1.5 (such stubs cannot be derived from the RemoteStub). Only use this method if you are sure that the stub class will be accessible.
Parameters:
obj - the object being exported.
Returns:
the remote object stub
Throws:
RemoteException - if the attempt to export the object failed.

exportObject

public static Remote exportObject(Remote obj,
                                  int port)
            throws RemoteException
Export object, making it available for the remote calls at the specified port. Since jdk 1.5 this method does not longer require the stub class to be present. If such class is not found, the stub is replaced by the dynamically constructed proxy class. No attempt to find and load the stubs is made if the system property java.rmi.server.ignoreStubClasses is set to true (set to reduce the starting time if the stubs are surely not present and exclusively 1.2 RMI is used).
Parameters:
obj - the object being exported.
port - the remote object port
Returns:
the remote object stub
Throws:
RemoteException - if the attempt to export the object failed.

exportObject

public static Remote exportObject(Remote obj,
                                  int port,
                                  RMIClientSocketFactory csf,
                                  RMIServerSocketFactory ssf)
            throws RemoteException
FIXME

unexportObject

public static boolean unexportObject(Remote obj,
                                     boolean force)
            throws NoSuchObjectException

UnicastRemoteObject.java -- Copyright (c) 1996, 1997, 1998, 1999, 2002, 2003, 2006 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.