Interface java.rmi.server.RemoteRef - JDK 5 Documentation v1.1.8, Java 2 SDK 英文文档

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Interface java.rmi.server.RemoteRef

public interface RemoteRef
extends Externalizable

RemoteRef represents the handle for a remote object.

packagePrefix: Find server package prefix: assumes that the implementation of server ref classes (e.g., UnicastRef, UnicastServerRef) are located in the package defined by the prefix.

done(RemoteCall): Allows the remote reference to clean up (or reuse) the connection.
getRefClass(ObjectOutput): Returns the class name of the ref type to be serialized onto the stream 'out'.
invoke(RemoteCall): Executes the remote call.
newCall(RemoteObject, Operation[], int, long): Creates an appropriate call object for a new remote method invocation on this object.
remoteEquals(RemoteRef): Compares two remote objects for equality.
remoteHashCode(): Returns a hashcode for a remote object.
remoteToString(): Returns a String that represents the reference of this remote object.

packagePrefix

 public static final String packagePrefix

Find server package prefix: assumes that the implementation of server ref classes (e.g., UnicastRef, UnicastServerRef) are located in the package defined by the prefix.

newCall

 public abstract RemoteCall newCall(RemoteObject obj,
                                    Operation op[],
                                    int opnum,
                                    long hash) throws RemoteException

Creates an appropriate call object for a new remote method invocation on this object. Passing operation array and index, allows the stubs generator to assign the operation indexes and interpret them. The remote reference may need the operation to encode in the call.

Throws: RemoteException: if registry could not be contacted.

invoke

 public abstract void invoke(RemoteCall call) throws Exception

Executes the remote call. Invoke will raise any "user" exceptions which should pass through and not be caught by the stub. If any exception is raised during the remote invocation, invoke should take care of cleaning up the connection before raising the "user" or remote exception.

Throws: Exception: if a general exception occurs.

done

 public abstract void done(RemoteCall call) throws RemoteException

Allows the remote reference to clean up (or reuse) the connection. Done should only be called if the invoke returns successfully (non-exceptionally) to the stub.

Throws: RemoteException: if registry could not be contacted.

getRefClass

 public abstract String getRefClass(ObjectOutput out)

Returns the class name of the ref type to be serialized onto the stream 'out'.

remoteHashCode

 public abstract int remoteHashCode()

Returns a hashcode for a remote object. Two remote object stubs that refer to the same remote object will have the same hash code (in order to support remote objects as keys in hash tables).

See Also:: Hashtable

remoteEquals

 public abstract boolean remoteEquals(RemoteRef obj)

Compares two remote objects for equality. Returns a boolean that indicates whether this remote object is equivalent to the specified Object. This method is used when a remote object is stored in a hashtable.

Parameters:: obj - the Object to compare with
Returns:: true if these Objects are equal; false otherwise.
See Also:: Hashtable

remoteToString

 public abstract String remoteToString()

Returns a String that represents the reference of this remote object.

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