edu.gwu.wordnet
Class RemoteFileManager

java.lang.Object
  edu.gwu.wordnet.FileManager
      edu.gwu.wordnet.RemoteFileManager

All Implemented Interfaces:

FileManagerInterface, java.rmi.Remote

public class RemoteFileManager

extends FileManager

implements java.rmi.Remote

An object of this class can serve as a file manager for remote FileBackedDictionary instantiations, using RMI. This class also contains utility routines to publish a RemoteFileManager for remote use, and to lookup a remote one for local use.

To make a RemoteFileManager available to remote clients:

   System.setSecurityManager(new RMISecurityManager());
   LocateRegistry.createRegistry(Registry.REGISTRY_PORT);
   new RemoteFileManager().bind();
 

To create a local DictionaryDatabase backed by a remote RemoteFileManager:

   DictionaryDatabase dictionary = new FileBackedDictionary(RemoteFileManager.lookup(hostname));
 

Nested Class Summary

Nested classes inherited from class edu.gwu.wordnet.FileManager

FileManager.NextLineCache

Field Summary

static java.lang.String

BINDING_NAME The standard RMI binding name.

Fields inherited from class edu.gwu.wordnet.FileManager

filenameCache, fileSeparator, IS_MAC_OS, IS_MW_VM, IS_WINDOWS_OS, nextLineCache, searchDirectory, TRACE_LOOKUP, VERSION

Constructor Summary

RemoteFileManager()
Construct a file manager backed by a set of files contained in the default WN search directory.

RemoteFileManager(java.lang.String searchDirectory)
Construct a file manager backed by a set of files contained in searchDirectory.

Method Summary

void	bind() Bind this object to the value of BINDING_NAME in the local RMI registry.
static FileManagerInterface	lookup(java.lang.String hostname) Lookup the object bound to the value of BINDING_NAME in the RMI registry on the host named by hostname

Methods inherited from class edu.gwu.wordnet.FileManager

compare, getFileStream, getIndexedLinePointer, getMatchingLinePointer, getNextLinePointer, getWNHome, getWNSearchDir, readLine, readLineAt, readLineWord, skipLine

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

BINDING_NAME

public static final java.lang.String BINDING_NAME

The standard RMI binding name.

Constructor Detail

RemoteFileManager

public RemoteFileManager()
                  throws java.rmi.RemoteException

Construct a file manager backed by a set of files contained in the default WN search directory. See FileManager for a description of the default search directory.

Throws:

java.rmi.RemoteException - If remote operation failed.

RemoteFileManager

public RemoteFileManager(java.lang.String searchDirectory)
                  throws java.rmi.RemoteException

Construct a file manager backed by a set of files contained in searchDirectory.

Throws:

java.rmi.RemoteException - If remote operation failed.

Method Detail

bind

public void bind()
          throws java.rmi.RemoteException,
                 java.rmi.AlreadyBoundException

Bind this object to the value of BINDING_NAME in the local RMI registry.

Throws:

java.rmi.AlreadyBoundException - If BINDING_NAME is already bound.

java.rmi.RemoteException - If remote operation failed.

lookup

public static FileManagerInterface lookup(java.lang.String hostname)
                                   throws java.rmi.AccessException,
                                          java.rmi.NotBoundException,
                                          java.rmi.RemoteException,
                                          java.rmi.UnknownHostException

Lookup the object bound to the value of BINDING_NAME in the RMI registry on the host named by hostname

Returns:

An RMI proxy of type FileManagerInterface.

Throws:

java.rmi.AccessException - If this operation is not permitted.

java.rmi.NotBoundException - If there is no object named BINDING_NAME in the remote registry.

java.rmi.RemoteException - If remote operation failed.

java.rmi.UnknownHostException - If the host could not be located.