UnicastRemoteObject (Java Platform SE 7 b138)

java.lang.Object
- java.rmi.server.RemoteObject
- - java.rmi.server.RemoteServer
  - - java.rmi.server.UnicastRemoteObject

All Implemented Interfaces:

Serializable, Remote

Direct Known Subclasses:

ActivationGroup
```
public class UnicastRemoteObject
extends RemoteServer
```
Used for exporting a remote object with JRMP and obtaining a stub that communicates to the remote object.
For the constructors and static exportObject methods below, the stub for a remote object being exported is obtained as follows:
- If the remote object is exported using the UnicastRemoteObject.exportObject(Remote) method, a stub class (typically pregenerated from the remote object's class using the rmic tool) is loaded and an instance of that stub class is constructed as follows.
  - A "root class" is determined as follows: if the remote object's class directly implements an interface that extends Remote, then the remote object's class is the root class; otherwise, the root class is the most derived superclass of the remote object's class that directly implements an interface that extends Remote.
  - The name of the stub class to load is determined by concatenating the binary name of the root class with the suffix "_Stub".
  - The stub class is loaded by name using the class loader of the root class. The stub class must extend RemoteStub and must have a public constructor that has one parameter, of type RemoteRef.
  - Finally, an instance of the stub class is constructed with a RemoteRef.
- If the appropriate stub class could not be found, or the stub class could not be loaded, or a problem occurs creating the stub instance, a StubNotFoundException is thrown.
- For all other means of exporting:
  - If the remote object's stub class (as defined above) could not be loaded or the system property java.rmi.server.ignoreStubClasses is set to "true" (case insensitive), a Proxy instance is constructed with the following properties:
    - The proxy's class is defined by the class loader of the remote object's class.
    - The proxy implements all the remote interfaces implemented by the remote object's class.
    - The proxy's invocation handler is a RemoteObjectInvocationHandler instance constructed with a RemoteRef.
    - If the proxy could not be created, a StubNotFoundException will be thrown.
  - Otherwise, an instance of the remote object's stub class (as described above) is used as the stub.
Since:

JDK1.1

See Also:
Serialized Form

Field Summary
- Fields inherited from class java.rmi.server.RemoteObject
  ref

Constructor Summary

Constructors
Modifier	Constructor and Description
`protected`	`UnicastRemoteObject()` Creates and exports a new UnicastRemoteObject object using an anonymous port.
`protected`	`UnicastRemoteObject(int port)` Creates and exports a new UnicastRemoteObject object using the particular supplied port.
`protected`	`UnicastRemoteObject(int port, RMIClientSocketFactory csf, RMIServerSocketFactory ssf)` Creates and exports a new UnicastRemoteObject object using the particular supplied port and socket factories.

Method Summary

Methods
Modifier and Type	Method and Description
`Object`	`clone()` Returns a clone of the remote object that is distinct from the original.
`static RemoteStub`	`exportObject(Remote obj)` Exports the remote object to make it available to receive incoming calls using an anonymous port.
`static Remote`	`exportObject(Remote obj, int port)` Exports the remote object to make it available to receive incoming calls, using the particular supplied port.
`static Remote`	`exportObject(Remote obj, int port, RMIClientSocketFactory csf, RMIServerSocketFactory ssf)` Exports the remote object to make it available to receive incoming calls, using a transport specified by the given socket factory.
`static boolean`	`unexportObject(Remote obj, boolean force)` Removes the remote object, obj, from the RMI runtime.

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
finalize, getClass, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - UnicastRemoteObject
```
protected UnicastRemoteObject()
                       throws RemoteException
```
    Creates and exports a new UnicastRemoteObject object using an anonymous port.
    
    Throws:
    
    RemoteException - if failed to export object
    Since:
    
    JDK1.1
  - UnicastRemoteObject
```
protected UnicastRemoteObject(int port)
                       throws RemoteException
```
    Creates and exports a new UnicastRemoteObject object using the particular supplied port.
    
    Parameters:
    port - the port number on which the remote object receives calls (if port is zero, an anonymous port is chosen)
    
    Throws:
    
    RemoteException - if failed to export object
    Since:
    
    1.2
  - UnicastRemoteObject
```
protected UnicastRemoteObject(int port,
                   RMIClientSocketFactory csf,
                   RMIServerSocketFactory ssf)
                       throws RemoteException
```
    Creates and exports a new UnicastRemoteObject object using the particular supplied port and socket factories.
    
    Parameters:
    port - the port number on which the remote object receives calls (if port is zero, an anonymous port is chosen)
    csf - the client-side socket factory for making calls to the remote object
    ssf - the server-side socket factory for receiving remote calls
    
    Throws:
    
    RemoteException - if failed to export object
    Since:
    
    1.2
- Method Detail
  - clone
```
public Object clone()
             throws CloneNotSupportedException
```
    Returns a clone of the remote object that is distinct from the original.
    
    Overrides:
    
    clone in class Object
    
    Returns:
    the new remote object
    
    Throws:
    
    CloneNotSupportedException - if clone failed due to a RemoteException.
    Since:
    
    JDK1.1
    
    See Also:
    Cloneable
  - exportObject
```
public static RemoteStub exportObject(Remote obj)
                               throws RemoteException
```
    Exports the remote object to make it available to receive incoming calls using an anonymous port.
    
    Parameters:
    obj - the remote object to be exported
    
    Returns:
    remote object stub
    
    Throws:
    
    RemoteException - if export fails
    Since:
    
    JDK1.1
  - exportObject
```
public static Remote exportObject(Remote obj,
                  int port)
                           throws RemoteException
```
    Exports the remote object to make it available to receive incoming calls, using the particular supplied port.
    
    Parameters:
    obj - the remote object to be exported
    port - the port to export the object on
    
    Returns:
    remote object stub
    
    Throws:
    
    RemoteException - if export fails
    Since:
    
    1.2
  - exportObject
```
public static Remote exportObject(Remote obj,
                  int port,
                  RMIClientSocketFactory csf,
                  RMIServerSocketFactory ssf)
                           throws RemoteException
```
    Exports the remote object to make it available to receive incoming calls, using a transport specified by the given socket factory.
    
    Parameters:
    obj - the remote object to be exported
    port - the port to export the object on
    csf - the client-side socket factory for making calls to the remote object
    ssf - the server-side socket factory for receiving remote calls
    
    Returns:
    remote object stub
    
    Throws:
    
    RemoteException - if export fails
    Since:
    
    1.2
  - unexportObject
```
public static boolean unexportObject(Remote obj,
                     boolean force)
                              throws NoSuchObjectException
```
    Removes the remote object, obj, from the RMI runtime. If successful, the object can no longer accept incoming RMI calls. If the force parameter is true, the object is forcibly unexported even if there are pending calls to the remote object or the remote object still has calls in progress. If the force parameter is false, the object is only unexported if there are no pending or in progress calls to the object.
    
    Parameters:
    obj - the remote object to be unexported
    force - if true, unexports the object even if there are pending or in-progress calls; if false, only unexports the object if there are no pending or in-progress calls
    
    Returns:
    true if operation is successful, false otherwise
    
    Throws:
    
    NoSuchObjectException - if the remote object is not currently exported
    Since:
    
    1.2

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DRAFT ea-b138

Class UnicastRemoteObject

Field Summary

Fields inherited from class java.rmi.server.RemoteObject

Constructor Summary

Method Summary

Methods inherited from class java.rmi.server.RemoteServer

Methods inherited from class java.rmi.server.RemoteObject

Methods inherited from class java.lang.Object

Constructor Detail

UnicastRemoteObject

UnicastRemoteObject

UnicastRemoteObject

Method Detail

clone

exportObject

exportObject

exportObject

unexportObject