org.javagroups.demos.wb
Class Whiteboard

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Container
              |
              +--java.awt.Panel
                    |
                    +--java.applet.Applet
                          |
                          +--org.javagroups.demos.wb.Whiteboard

All Implemented Interfaces:

javax.accessibility.Accessible, java.awt.event.ActionListener, java.awt.event.ComponentListener, java.util.EventListener, java.awt.event.FocusListener, java.awt.image.ImageObserver, MembershipListener, java.awt.MenuContainer, MessageListener, java.io.Serializable

public class Whiteboard

extends java.applet.Applet

implements java.awt.event.ActionListener, MessageListener, MembershipListener, java.awt.event.ComponentListener, java.awt.event.FocusListener

Shared whiteboard: members are represented by rectangles that contain their names and the OS/arch of the machine they are working on. The boxes can be moved by anyone and by clicking on them, messages can be sent to specific or all members. Whiteboard is both an application and an applet.

Author:

Bela Ban

See Also:

Serialized Form

Field Summary

RpcDispatcher	disp
java.lang.String	groupname

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

Whiteboard()

Whiteboard(java.lang.String properties)

Method Summary

void	actionPerformed(java.awt.event.ActionEvent e)
void	addNode(java.lang.String lbl, Address addr, int xloc, int yloc)
void	block() Block sending and receiving of messages until viewAccepted() is called
void	componentHidden(java.awt.event.ComponentEvent e)
void	componentMoved(java.awt.event.ComponentEvent e)
void	componentResized(java.awt.event.ComponentEvent e)
void	componentShown(java.awt.event.ComponentEvent e)
void	destroy()
void	displayMessage(java.lang.String sender, java.lang.String msg)
void	focusGained(java.awt.event.FocusEvent e)
void	focusLost(java.awt.event.FocusEvent e)
byte[]	getState()
void	init()
static void	main(java.lang.String[] args)
void	moveNode(Node n)
void	receive(Message m)
void	removeNode(java.lang.Object addr)
void	repaint()
void	setState(byte[] new_state)
void	suspect(Address obj) Called when a member is suspected
void	viewAccepted(View v) Called by JavaGroups to notify the target object of a change of membership.

Methods inherited from class java.applet.Applet

getAccessibleContext, getAppletContext, getAppletInfo, getAudioClip, getAudioClip, getCodeBase, getDocumentBase, getImage, getImage, getLocale, getParameter, getParameterInfo, isActive, newAudioClip, play, play, resize, resize, setStub, showStatus, start, stop

Methods inherited from class java.awt.Panel

addNotify

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getAlignmentX, getAlignmentY, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getInsets, getLayout, getListeners, getMaximumSize, getMinimumSize, getPreferredSize, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paint, paintComponents, paramString, preferredSize, print, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, removeNotify, setFocusCycleRoot, setFocusTraversalKeys, setFocusTraversalPolicy, setFont, setLayout, transferFocusBackward, transferFocusDownCycle, update, validate, validateTree

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, contains, createImage, createImage, createVolatileImage, createVolatileImage, disable, disableEvents, dispatchEvent, enable, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocation, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getSize, getToolkit, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isDoubleBuffered, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isOpaque, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, printAll, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, reshape, setBackground, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setFocusable, setFocusTraversalKeysEnabled, setForeground, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, setVisible, show, show, size, toString, transferFocus, transferFocusUpCycle

Methods inherited from class java.lang.Object

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

Field Detail

disp

public RpcDispatcher disp

groupname

public final java.lang.String groupname

See Also:

Constant Field Values

Constructor Detail

Whiteboard

public Whiteboard()

Whiteboard

public Whiteboard(java.lang.String properties)

Method Detail

receive

public void receive(Message m)

Specified by:

receive in interface MessageListener

getState

public byte[] getState()

Specified by:

getState in interface MessageListener

setState

public void setState(byte[] new_state)

Specified by:

setState in interface MessageListener

init

public void init()

Overrides:

init in class java.applet.Applet

destroy

public void destroy()

Overrides:

destroy in class java.applet.Applet

repaint

public void repaint()

Overrides:

repaint in class java.awt.Component

actionPerformed

public void actionPerformed(java.awt.event.ActionEvent e)

Specified by:

actionPerformed in interface java.awt.event.ActionListener

viewAccepted

public void viewAccepted(View v)

Description copied from interface: MembershipListener

Called by JavaGroups to notify the target object of a change of membership. No long running actions should be done in this callback in the case of Ensemble, as this would block Ensemble. If some long running action needs to be performed, it should be done in a separate thread (cf. ../Tests/QuoteServer.java).

Specified by:

viewAccepted in interface MembershipListener

suspect

public void suspect(Address obj)

Description copied from interface: MembershipListener

Called when a member is suspected

Specified by:

suspect in interface MembershipListener

block

public void block()

Description copied from interface: MembershipListener

Block sending and receiving of messages until viewAccepted() is called

Specified by:

block in interface MembershipListener

moveNode

public void moveNode(Node n)

addNode

public void addNode(java.lang.String lbl,
                    Address addr,
                    int xloc,
                    int yloc)

removeNode

public void removeNode(java.lang.Object addr)

displayMessage

public void displayMessage(java.lang.String sender,
                           java.lang.String msg)

componentResized

public void componentResized(java.awt.event.ComponentEvent e)

Specified by:

componentResized in interface java.awt.event.ComponentListener

componentMoved

public void componentMoved(java.awt.event.ComponentEvent e)

Specified by:

componentMoved in interface java.awt.event.ComponentListener

componentShown

public void componentShown(java.awt.event.ComponentEvent e)

Specified by:

componentShown in interface java.awt.event.ComponentListener

componentHidden

public void componentHidden(java.awt.event.ComponentEvent e)

Specified by:

componentHidden in interface java.awt.event.ComponentListener

focusGained

public void focusGained(java.awt.event.FocusEvent e)

Specified by:

focusGained in interface java.awt.event.FocusListener

focusLost

public void focusLost(java.awt.event.FocusEvent e)

Specified by:

focusLost in interface java.awt.event.FocusListener

main

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