org.jgroups.demos

Class Chat

java.lang.Object

org.jgroups.demos.Chat

All Implemented Interfaces:

java.awt.event.MouseListener, java.awt.event.WindowListener, java.util.EventListener, ExtendedMembershipListener, ExtendedMessageListener, MembershipListener, MessageListener

public class Chat
extends java.lang.Object
implements java.awt.event.MouseListener, java.awt.event.WindowListener, ExtendedMessageListener, ExtendedMembershipListener

Simple chat demo

Version:

$Id: Chat.java,v 1.15 2006/09/27 19:21:54 vlada Exp $

Author:

Bela Ban

Constructor Summary

Constructors

Constructor and Description
Chat(java.lang.String props)

Method Summary

Methods

Modifier and Type	Method and Description
void	block() Called (usually by the FLUSH protocol), as an indication that the member should stop sending messages.
byte[]	getState() Answers the group state; e.g., when joining.
void	getState(java.io.OutputStream os) Allows an application to write a state through a provided OutputStream.
byte[]	getState(java.lang.String state_id) Allows an application to provide a partial state as a byte array
void	getState(java.lang.String state_id, java.io.OutputStream ostream) Allows an application to write a partial state through a provided OutputStream.
static void	main(java.lang.String[] args)
void	mouseClicked(java.awt.event.MouseEvent e)
void	mouseEntered(java.awt.event.MouseEvent e)
void	mouseExited(java.awt.event.MouseEvent e)
void	mousePressed(java.awt.event.MouseEvent e)
void	mouseReleased(java.awt.event.MouseEvent e)
void	receive(Message msg) Called when a message is received.
void	setState(byte[] state) Sets the group state; e.g., when joining.
void	setState(java.io.InputStream is) Allows an application to read a state through a provided InputStream.
void	setState(java.lang.String state_id, byte[] state) Allows an application to read a partial state indicated by state_id from a given state byte array parameter.
void	setState(java.lang.String state_id, java.io.InputStream istream) Allows an application to read a partial state through a provided InputStream.
void	start()
void	suspect(Address suspected_mbr) Called whenever a member is suspected of having crashed, but has not yet been excluded.
void	unblock() Called after the FLUSH protocol has unblocked previously blocked senders, and messages can be sent again.
void	viewAccepted(View new_view) Called when a change in membership has occurred.
void	windowActivated(java.awt.event.WindowEvent e)
void	windowClosed(java.awt.event.WindowEvent e)
void	windowClosing(java.awt.event.WindowEvent e)
void	windowDeactivated(java.awt.event.WindowEvent e)
void	windowDeiconified(java.awt.event.WindowEvent e)
void	windowIconified(java.awt.event.WindowEvent e)
void	windowOpened(java.awt.event.WindowEvent e)

Methods inherited from class java.lang.Object

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

Constructor Detail

Chat

public Chat(java.lang.String props)

Method Detail

main

public static void main(java.lang.String[] args)

start

public void start()

receive

public void receive(Message msg)

Description copied from interface: MessageListener

Called when a message is received.

Specified by:

receive in interface MessageListener

getState

public byte[] getState(java.lang.String state_id)

Description copied from interface: ExtendedMessageListener

Allows an application to provide a partial state as a byte array

Specified by:

getState in interface ExtendedMessageListener

Parameters:

state_id - id of the partial state requested

Returns:

partial state for the given state_id

getState

public byte[] getState()

Description copied from interface: MessageListener

Answers the group state; e.g., when joining.

Specified by:

getState in interface MessageListener

Returns:

byte[]

setState

public void setState(byte[] state)

Description copied from interface: MessageListener

Sets the group state; e.g., when joining.

Specified by:

setState in interface MessageListener

setState

public void setState(java.lang.String state_id,
            byte[] state)

Description copied from interface: ExtendedMessageListener

Allows an application to read a partial state indicated by state_id from a given state byte array parameter.

Specified by:

setState in interface ExtendedMessageListener

Parameters:

state_id - id of the partial state requested

state - partial state for the given state_id

getState

public void getState(java.io.OutputStream os)

Description copied from interface: ExtendedMessageListener

Allows an application to write a state through a provided OutputStream. An application is obligated to always close the given OutputStream reference.

Specified by:

getState in interface ExtendedMessageListener

Parameters:

os - the OutputStream

See Also:

OutputStream.close()

setState

public void setState(java.io.InputStream is)

Description copied from interface: ExtendedMessageListener

Allows an application to read a state through a provided InputStream. An application is obligated to always close the given InputStream reference.

Specified by:

setState in interface ExtendedMessageListener

Parameters:

is - the InputStream

See Also:

InputStream.close()

getState

public void getState(java.lang.String state_id,
            java.io.OutputStream ostream)

Description copied from interface: ExtendedMessageListener

Allows an application to write a partial state through a provided OutputStream. An application is obligated to always close the given OutputStream reference.

Specified by:

getState in interface ExtendedMessageListener

Parameters:

state_id - id of the partial state requested

ostream - the OutputStream

See Also:

OutputStream.close()

setState

public void setState(java.lang.String state_id,
            java.io.InputStream istream)

Description copied from interface: ExtendedMessageListener

Allows an application to read a partial state through a provided InputStream. An application is obligated to always close the given InputStream reference.

Specified by:

setState in interface ExtendedMessageListener

Parameters:

state_id - id of the partial state requested

istream - the InputStream

See Also:

InputStream.close()

viewAccepted

public void viewAccepted(View new_view)

Description copied from interface: MembershipListener

Called when a change in membership has occurred. No long running actions should be done in this callback. If some long running action needs to be performed, it should be done in a separate thread.

Specified by:

viewAccepted in interface MembershipListener

suspect

public void suspect(Address suspected_mbr)

Description copied from interface: MembershipListener

Called whenever a member is suspected of having crashed, but has not yet been excluded.

Specified by:

suspect in interface MembershipListener

block

public void block()

Description copied from interface: MembershipListener

Called (usually by the FLUSH protocol), as an indication that the member should stop sending messages. Any messages sent after returning from this callback might get blocked by the FLUSH protocol. When the FLUSH protocol is done, and messages can be sent again, the FLUSH protocol will simply unblock all pending messages. If a callback for unblocking is desired, implement ExtendedMembershipListener.unblock(). Note that block() is the equivalent of reception of a BlockEvent in the pull mode.

Specified by:

block in interface MembershipListener

unblock

public void unblock()

Description copied from interface: ExtendedMembershipListener

Called after the FLUSH protocol has unblocked previously blocked senders, and messages can be sent again. This callback only needs to be implemented if we require a notification of that.

Specified by:

unblock in interface ExtendedMembershipListener

mouseClicked

public void mouseClicked(java.awt.event.MouseEvent e)

Specified by:

mouseClicked in interface java.awt.event.MouseListener

mouseEntered

public void mouseEntered(java.awt.event.MouseEvent e)

Specified by:

mouseEntered in interface java.awt.event.MouseListener

mouseExited

public void mouseExited(java.awt.event.MouseEvent e)

Specified by:

mouseExited in interface java.awt.event.MouseListener

mousePressed

public void mousePressed(java.awt.event.MouseEvent e)

Specified by:

mousePressed in interface java.awt.event.MouseListener

mouseReleased

public void mouseReleased(java.awt.event.MouseEvent e)

Specified by:

mouseReleased in interface java.awt.event.MouseListener

windowActivated

public void windowActivated(java.awt.event.WindowEvent e)

Specified by:

windowActivated in interface java.awt.event.WindowListener

windowClosed

public void windowClosed(java.awt.event.WindowEvent e)

Specified by:

windowClosed in interface java.awt.event.WindowListener

windowClosing

public void windowClosing(java.awt.event.WindowEvent e)

Specified by:

windowClosing in interface java.awt.event.WindowListener

windowDeactivated

public void windowDeactivated(java.awt.event.WindowEvent e)

Specified by:

windowDeactivated in interface java.awt.event.WindowListener

windowDeiconified

public void windowDeiconified(java.awt.event.WindowEvent e)

Specified by:

windowDeiconified in interface java.awt.event.WindowListener

windowIconified

public void windowIconified(java.awt.event.WindowEvent e)

Specified by:

windowIconified in interface java.awt.event.WindowListener

windowOpened

public void windowOpened(java.awt.event.WindowEvent e)

Specified by:

windowOpened in interface java.awt.event.WindowListener