ChatApp
Class ChatClientServant

java.lang.Object
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  +--org.omg.CORBA.portable.ObjectImpl
        |
        +--org.omg.CORBA.DynamicImplementation
              |
              +--ChatApp._ChatClientImplBase
                    |
                    +--ChatApp.ChatClientServant

public class ChatClientServant

extends _ChatClientImplBase

ChatClientServant is the main object of a ChatClient in the secured CHat Application. This object is in charge of the registration and messaging of the client to the server and other registered client All the encryption and decryption is done by this class leaving the gui to handle only the communication with the CORBA naming service. The Methods marked as remote methods are invoked by the remote ChatRegistryServant. Other methods are invoked by the application gui.

See Also:

Serialized Form

Constructor Summary

ChatClientServant()
Empty constructor when no gui is used

ChatClientServant(MyChatApp app)
Cunstructs a ChatClientServant for a specific gui.

Method Summary

void	ackRegister(short ackType) Remote methode for acknowledging the registration.
void	broadcastMessage(java.lang.String message, java.lang.String clientID, ChatRegistry ref) Broadcast a message to all other registered clients by encrypting the original message with the server's session key and remotely invoke the broadcast method on the remote ChatRegistry object
void	clientAdded(java.lang.String clientID) Remote method.
void	clientRemoved(java.lang.String clientID) Remote Method.
void	printMessage(byte[] Message, java.lang.String sourceID) Remote method.
void	printPrivateMessage(byte[] Message, java.lang.String SourceID) Remote method.
void	registerToServer(java.lang.String clientID, ChatRegistry ref) Register this client to the server by encrypting his client ID and remotely invoke the server's register method.
void	sendPrivateMessage(java.lang.String message, java.lang.String sourceID, java.lang.String destID, ChatRegistry ref) Send a private message to another registered client by encrypting the message, the sender's ID and the receiver's ID with the server's PKCS public key (so other registered users can't decrypt) and remotely invoke the sendPrivateMessage on the ChatRegistry remote object
void	unregisterFromServer(java.lang.String clientID, ChatRegistry ref) UnRegister this client to the server by encrypting his client ID and remotely invoke the server's unregister method.

Methods inherited from class ChatApp._ChatClientImplBase

_ids, invoke

Methods inherited from class org.omg.CORBA.portable.ObjectImpl

_create_request, _create_request, _duplicate, _get_delegate, _get_domain_managers, _get_interface_def, _get_policy, _hash, _invoke, _is_a, _is_equivalent, _is_local, _non_existent, _orb, _release, _releaseReply, _request, _request, _servant_postinvoke, _servant_preinvoke, _set_delegate, _set_policy_override, equals, hashCode, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

ChatClientServant

public ChatClientServant()

Empty constructor when no gui is used

ChatClientServant

public ChatClientServant(MyChatApp app)

Cunstructs a ChatClientServant for a specific gui.

Parameters:

app - The application gui of the ChatClient.

Method Detail

ackRegister

public void ackRegister(short ackType)

Remote methode for acknowledging the registration. This method is remotely called by the server after the client's attempt to register to the server.

Parameters:

ackType - acknowledge type. For future implementations. Not used in this version.

printMessage

public void printMessage(byte[] Message,
                         java.lang.String sourceID)

Remote method. Prints a broadcasted message from another registered client to the application gui

Parameters:

encMessage - The encrypted message, encrypted by the server's session key

sourceID - the sender's ID

printPrivateMessage

public void printPrivateMessage(byte[] Message,
                                java.lang.String SourceID)

Remote method. Prints a private message from another registered client to the application gui

Parameters:

encMessage - The encrypted message, encrypted with the client public PKCS key

encSourceID - The encrypted sender's ID, encrypted by the client public PKCS key

clientAdded

public void clientAdded(java.lang.String clientID)

Remote method. Inform the gui about a new client on the ChatServer

clientRemoved

public void clientRemoved(java.lang.String clientID)

Remote Method. Informs the gui about a removed client from the ChatServer

registerToServer

public void registerToServer(java.lang.String clientID,
                             ChatRegistry ref)

Register this client to the server by encrypting his client ID and remotely invoke the server's register method.

Parameters:

clientID - The unencrypted registering client ID

ref - a remote object represents the ChatRegistry

unregisterFromServer

public void unregisterFromServer(java.lang.String clientID,
                                 ChatRegistry ref)

UnRegister this client to the server by encrypting his client ID and remotely invoke the server's unregister method.

Parameters:

clientID - The unencrypted unregistering client ID

ref - a remote object represents the ChatRegistry

broadcastMessage

public void broadcastMessage(java.lang.String message,
                             java.lang.String clientID,
                             ChatRegistry ref)

Broadcast a message to all other registered clients by encrypting the original message with the server's session key and remotely invoke the broadcast method on the remote ChatRegistry object

Parameters:

message - The original, unencrypted message

clientID - The sender's ID

ref - a remote object represents the ChatRegistry

sendPrivateMessage

public void sendPrivateMessage(java.lang.String message,
                               java.lang.String sourceID,
                               java.lang.String destID,
                               ChatRegistry ref)

Send a private message to another registered client by encrypting the message, the sender's ID and the receiver's ID with the server's PKCS public key (so other registered users can't decrypt) and remotely invoke the sendPrivateMessage on the ChatRegistry remote object

Parameters:

message - The original unencrypted message

sourceID - The sender's unencrypted ID

destID - The receiver's unencrypted ID

ref - a remote object represents the ChatRegistry