mil.navy.nps.bridge
Class AwtMulticastRelayClient

java.lang.Object
  java.awt.Component
      java.awt.Container
          java.awt.Panel
              java.applet.Applet
                  mil.navy.nps.bridge.AwtMulticastRelayClient

All Implemented Interfaces:

javax.accessibility.Accessible, java.awt.event.ActionListener, java.util.EventListener, java.awt.image.ImageObserver, java.awt.event.ItemListener, java.awt.MenuContainer, java.io.Serializable

public class AwtMulticastRelayClient

extends java.applet.Applet

implements java.awt.event.ActionListener, java.awt.event.ItemListener

A quick applet that does local relay work for multicast. This is a bit better than a plain command line application. Lots of verbose and silly J++ comments included below.

Version:

1.0

Author:

Don McGregor http://www.npsnet.org/~mcgredo

See Also:

Serialized Form

Nested Class Summary

Nested classes inherited from class java.applet.Applet

java.applet.Applet.AccessibleApplet

Nested classes inherited from class java.awt.Panel

java.awt.Panel.AccessibleAWTPanel

Nested classes inherited from class java.awt.Container

java.awt.Container.AccessibleAWTContainer

Nested classes inherited from class java.awt.Component

java.awt.Component.AccessibleAWTComponent, java.awt.Component.BltBufferStrategy, java.awt.Component.FlipBufferStrategy

Field Summary

static boolean	DEBUG
static java.lang.String	DEFAULT_LOCAL_UNICAST
static java.lang.String	DEFAULT_MCAST_ADDRESS
static java.lang.String	DEFAULT_MCAST_PORT
static java.lang.String	DEFAULT_SERVER
static java.lang.String	DEFAULT_SERVER_PORT
protected static java.awt.TextField	localUnicastPort
static boolean	m_fStandAlone
static int	MAX_PACKET_SIZE
protected static java.awt.TextField	mcastRelayServer
protected static java.awt.TextField	mcastRelayServerPort
protected static java.awt.Checkbox	multicastCheckbox
protected static java.net.MulticastSocket	multicastSocket
protected static java.awt.TextField	packetCount
protected static java.awt.TextField	port
(package private) boolean	receivedFromLocalhostOrLAN
(package private) boolean	receivedFromServer
protected java.net.DatagramPacket	replyPacket
protected static java.awt.TextField	sendAddress
protected static boolean	sending
static int	SOCKET_TIMEOUT
protected static java.awt.CheckboxGroup	socketTypeRadio
protected static java.awt.Button	startButton
protected static java.awt.Button	stopButton
static int	TIME_TO_LIVE
protected static java.awt.Checkbox	unicastCheckbox
protected static java.net.DatagramSocket	unicastDatagramSocket

Fields inherited from class java.applet.Applet

Fields inherited from class java.awt.Container

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

AwtMulticastRelayClient()
Main constructor, which lays out fields in the AWT.

Method Summary

void	actionPerformed(java.awt.event.ActionEvent ae) ActionListener for the start and stop buttons.
static void	debug(java.lang.String pDebugString) Debugging output.
void	destroy()
protected void	finalize()
java.lang.String	getAppletInfo()
void	init()
void	itemStateChanged(java.awt.event.ItemEvent e) itemStateChanged is the implementation of the interface ItemListener, which is used by checkboxes.
static void	main(java.lang.String[] args)
void	paint(java.awt.Graphics g)
void	relayPackets() Does the dirty work of actually relaying the packets.
java.lang.String	respondToServer(java.net.DatagramSocket pSocket, java.net.DatagramPacket pPacket, java.net.InetAddress address, int port) check for hello packets from server and respond with "iAmHere" for each packet received.
void	start()
void	stop()
protected static void	trace(java.lang.String pDiagnostic) Guaranteed debugging output.

Methods inherited from class java.applet.Applet

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

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, 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, 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, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

DEFAULT_SERVER

public static final java.lang.String DEFAULT_SERVER

See Also:

Constant Field Values

DEFAULT_SERVER_PORT

public static final java.lang.String DEFAULT_SERVER_PORT

See Also:

Constant Field Values

DEFAULT_MCAST_ADDRESS

public static final java.lang.String DEFAULT_MCAST_ADDRESS

See Also:

Constant Field Values

DEFAULT_MCAST_PORT

public static final java.lang.String DEFAULT_MCAST_PORT

See Also:

Constant Field Values

TIME_TO_LIVE

public static final int TIME_TO_LIVE

See Also:

Constant Field Values

DEFAULT_LOCAL_UNICAST

public static final java.lang.String DEFAULT_LOCAL_UNICAST

See Also:

Constant Field Values

MAX_PACKET_SIZE

public static final int MAX_PACKET_SIZE

See Also:

Constant Field Values

DEBUG

public static final boolean DEBUG

See Also:

Constant Field Values

SOCKET_TIMEOUT

public static final int SOCKET_TIMEOUT

See Also:

Constant Field Values

replyPacket

protected java.net.DatagramPacket replyPacket

receivedFromServer

boolean receivedFromServer

receivedFromLocalhostOrLAN

boolean receivedFromLocalhostOrLAN

m_fStandAlone

public static boolean m_fStandAlone

mcastRelayServer

protected static java.awt.TextField mcastRelayServer

mcastRelayServerPort

protected static java.awt.TextField mcastRelayServerPort

sendAddress

protected static java.awt.TextField sendAddress

port

protected static java.awt.TextField port

localUnicastPort

protected static java.awt.TextField localUnicastPort

packetCount

protected static java.awt.TextField packetCount

socketTypeRadio

protected static java.awt.CheckboxGroup socketTypeRadio

multicastCheckbox

protected static java.awt.Checkbox multicastCheckbox

unicastCheckbox

protected static java.awt.Checkbox unicastCheckbox

sending

protected static boolean sending

startButton

protected static java.awt.Button startButton

stopButton

protected static java.awt.Button stopButton

unicastDatagramSocket

protected static java.net.DatagramSocket unicastDatagramSocket

multicastSocket

protected static java.net.MulticastSocket multicastSocket

Constructor Detail

AwtMulticastRelayClient

public AwtMulticastRelayClient()

Main constructor, which lays out fields in the AWT.

Method Detail

debug

public static void debug(java.lang.String pDebugString)

Debugging output. Pass in a string, and it gets printed out on the console. You can pass in strings such as "foo " + bar.getName().

trace

protected static void trace(java.lang.String pDiagnostic)

Guaranteed debugging output. Pass in a string, and it gets printed out on the console. You can pass in strings such as "foo " + bar.getName().

main

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

getAppletInfo

public java.lang.String getAppletInfo()

init

public void init()

destroy

public void destroy()

paint

public void paint(java.awt.Graphics g)

start

public void start()

stop

public void stop()

respondToServer

public java.lang.String respondToServer(java.net.DatagramSocket pSocket,
                                        java.net.DatagramPacket pPacket,
                                        java.net.InetAddress address,
                                        int port)

check for hello packets from server and respond with "iAmHere" for each packet received.

relayPackets

public void relayPackets()

Does the dirty work of actually relaying the packets. Connects up to the server, reads the packets, and spits them back out again on this side.

actionPerformed

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

ActionListener for the start and stop buttons. This uses the AWT 1.1 event model, and implemens the ActionListener interface.

Specified by:

actionPerformed in interface java.awt.event.ActionListener

itemStateChanged

public void itemStateChanged(java.awt.event.ItemEvent e)

itemStateChanged is the implementation of the interface ItemListener, which is used by checkboxes. The checkboxes add us as a listener, and we get their events. This is based on the Java 1.1 event model.

Specified by:

itemStateChanged in interface java.awt.event.ItemListener

finalize

protected void finalize()