jxl.enclosure.peer
Class ModuleServer

java.lang.Object
  java.rmi.server.RemoteObject
      java.rmi.server.RemoteServer
          java.rmi.server.UnicastRemoteObject
              jxl.peermi.PeerRemoteObject
                  jxl.enclosure.peer.ModuleServer

All Implemented Interfaces:

java.io.Serializable, java.rmi.Remote, ModuleServerInterface, PeerRemote

public class ModuleServer
extends PeerRemoteObject
implements ModuleServerInterface

The implementation of the module server.

Author:

Alex Lynch

See Also:

Serialized Form

Field Summary

static java.lang.String

MODULE_SERVER_BINDING Name used to bind to PeerRegistry

Fields inherited from class java.rmi.server.RemoteObject

ref

Method Summary

byte[]	findModuleOf(java.lang.String[] classNames) Find a module containg a class whose name is className
byte[]	findUpdate(java.lang.String module, Version version) Find the newest version of module
static ModuleServer	getInstance() Return a singleton instance of ModuleServer
ObjectPair<byte[],Version>	locate(java.lang.String[] classNames) Remote method, should not be called by a client
ObjectPair<byte[],Version>	update(java.lang.String module, Version version) Remote method, should not be called by a client

Methods inherited from class jxl.peermi.PeerRemoteObject

checkAlive, isAlive, toStub

Methods inherited from class java.rmi.server.UnicastRemoteObject

clone, exportObject, exportObject, exportObject, unexportObject

Methods inherited from class java.rmi.server.RemoteServer

getClientHost, getLog, setLog

Methods inherited from class java.rmi.server.RemoteObject

equals, getRef, hashCode, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface jxl.peermi.PeerRemote

checkAlive

Field Detail

MODULE_SERVER_BINDING

public static final java.lang.String MODULE_SERVER_BINDING

Name used to bind to PeerRegistry

Method Detail

getInstance

public static ModuleServer getInstance()
                                throws java.rmi.RemoteException

Return a singleton instance of ModuleServer

Throws:

java.rmi.RemoteException

findUpdate

public byte[] findUpdate(java.lang.String module,
                         Version version)
                  throws java.lang.Exception

Find the newest version of module

Parameters:

module - the name of the module

version - The current version

Returns:

the byte[] data of the newest version of module or null if no version newer than version could be found.

Throws:

java.lang.Exception

findModuleOf

public byte[] findModuleOf(java.lang.String[] classNames)
                    throws java.lang.Exception

Find a module containg a class whose name is className

Parameters:

className - The name of the class to find.

Returns:

the byte[] data of the module with the highest version, or null if none could be found.

Throws:

java.lang.Exception

locate

public final ObjectPair<byte[],Version> locate(java.lang.String[] classNames)
                                        throws java.rmi.RemoteException

Remote method, should not be called by a client

Specified by:

locate in interface ModuleServerInterface

Returns:

An ObjectPair containing the byte[] data of the module and its Version, or null if it could not be found

Throws:

java.rmi.RemoteException

update

public final ObjectPair<byte[],Version> update(java.lang.String module,
                                               Version version)
                                        throws java.rmi.RemoteException

Remote method, should not be called by a client

Specified by:

update in interface ModuleServerInterface

Parameters:

module - The name of the module to find

version - The current version

Returns:

If a module newer than version was found, return a ObjectPair containing byte[] data of the module, and the Version of that module. If no such module was found, return null;

Throws:

java.rmi.RemoteException