Class prominence.chat.Registry 
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Class prominence.chat.Registry 

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.Container
                   |
                   +----java.awt.Panel
                           |
                           +----prominence.chat.Registry
public class Registry
extends Panel
implements Client
A registry of clients connected to the server; this is a Panel that implements the Client interface and contains a List of connected users and a Button to clear the current selection.

This class parses messages from a ChatSystemHandler directed to the "registry" tool, and maintains a client-list based on this information.

See Also:
ChatSystemHandler

Variable Index

o list
The List component.

Constructor Index

o Registry()
Creates a new Registry which contains an empty List of client names and a Button to clear the current selection.

Method Index

o action(Event, Object)
Processes the clear Button.
o disconnected()
Disconnects this tool; for this class, this has no effect.
o receive(DataInputStream)
Receives a message from the ChatSystemHandler, and updates the client list accordingly.
o setMessageOutput(MessageOutput)
Assigns a message stream over which this tool can communicate.
o targets()
Returns a list of the currently selected client names.

Variables

o list 
  protected List list
The List component.

Constructors

o Registry 
  public Registry()
Creates a new Registry which contains an empty List of client names and a Button to clear the current selection.

Methods

o setMessageOutput 
  public void setMessageOutput(MessageOutput o)
Assigns a message stream over which this tool can communicate. This tool sends no messages, so we ignore this method.
o receive 
  public void receive(DataInputStream i)
Receives a message from the ChatSystemHandler, and updates the client list accordingly.

Messages consist of a boolean flag indicating whether the clients are joining or leaving, followed by a list of client names.

Parameters:
i - A stream from which the message can be read
o disconnected 
  public void disconnected()
Disconnects this tool; for this class, this has no effect.
o action 
  public boolean action(Event e,
                        Object what)
Processes the clear Button.
Overrides:
action in class Component
o targets 
  public String[] targets()
Returns a list of the currently selected client names.
Returns:
An array of Strings 
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