rmi
Class ChatParticipant

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

All Implemented Interfaces:

java.io.Serializable, java.rmi.Remote, ChatParticipantInterface

Direct Known Subclasses:

ChatClient, ChatServer

public abstract class ChatParticipant
extends java.rmi.server.UnicastRemoteObject
implements ChatParticipantInterface

Class for participants in simple chat application. This class contains code common to server and clients. All parties maintain a list of clients.

See Also:

Serialized Form

Field Summary

protected java.util.List<ChatClientInterface>	clients
static java.lang.String	errorPrefix Prefix for error messages.
static java.lang.String	serverPrefix Prefix for messages from server.

Fields inherited from class java.rmi.server.RemoteObject

ref

Constructor Summary

ChatParticipant()
Constructs object.

Method Summary

void	addClient(ChatClientInterface c) Adds client.
void	broadcast(java.lang.String message) Sends message to all clients.
abstract java.lang.String	getMessagePrefix() Gets prefix for messages broadcast by this object.
void	removeClient(ChatClientInterface c) Removes client.

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, toStub

Methods inherited from class java.lang.Object

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

Methods inherited from interface rmi.ChatParticipantInterface

display

Field Detail

clients

protected java.util.List<ChatClientInterface> clients

serverPrefix

public static final java.lang.String serverPrefix

Prefix for messages from server.

See Also:

Constant Field Values

errorPrefix

public static final java.lang.String errorPrefix

Prefix for error messages.

See Also:

Constant Field Values

Constructor Detail

ChatParticipant

public ChatParticipant()
                throws java.rmi.RemoteException

Constructs object.

Throws:

java.rmi.RemoteException

Method Detail

addClient

public void addClient(ChatClientInterface c)
               throws java.rmi.RemoteException

Adds client.

Specified by:

addClient in interface ChatParticipantInterface

Parameters:

c - client to add

Throws:

java.rmi.RemoteException

removeClient

public void removeClient(ChatClientInterface c)
                  throws java.rmi.RemoteException

Removes client.

Specified by:

removeClient in interface ChatParticipantInterface

Parameters:

c - client to remove

Throws:

java.rmi.RemoteException

broadcast

public void broadcast(java.lang.String message)
               throws java.rmi.RemoteException

Sends message to all clients.

Specified by:

broadcast in interface ChatParticipantInterface

Parameters:

message - message to send to all

Throws:

java.rmi.RemoteException

getMessagePrefix

public abstract java.lang.String getMessagePrefix()

Gets prefix for messages broadcast by this object.

Returns:

prefix for messages (screen name for clients, e.g.)