net.sf.cscc.examples.simplesystem
Class Client

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Container
              |
              +--java.awt.Window
                    |
                    +--java.awt.Frame
                          |
                          +--javax.swing.JFrame
                                |
                                +--net.sf.cscc.examples.simplesystem.Client

public class Client

extends javax.swing.JFrame

implements java.awt.event.ActionListener, DataEventReceivingObserver, CommunicationEventObserver

This class provides a client application, which demonstrates the usage of this client/server component. The client application allows to connect to a specific server with a specific port and sends then some information about the user over the net. The data is sent by calling the method ClientConnectionManager.sendDataEvent(DataEvent de).
Important for using the client/server component is the implementation of the methods receiveEvent(CommunicationEvent ce) and receiveEvent(DataEvent de) which allow to receive data and communication events from the client/server component.

Author

Silvio Meier

Copyright

Silvio Meier, Tobias Reinhard, 2003

History

2003-05-15 SM First Version.
2003-05-16 SM Comments and full implemented functionality.
2003-05-17 SM Comments corrected
2003-05-18 SM Unecessary close call removed when getting
a closed connection communication event.
2003-05-28 SM Make up in gui resized some labels and buttons
to fit on screen with different sized fonts.
2003-06-12 SM Now it is checked if the connection was
established or not. The client does not
change into connected status anymore, if the
connection was not established successfully.
2004-12-13 SM Some cleaning of unused things.
2006-11-28 SM Comments revised.

Version

$Date: 2007/07/02 21:26:17 $, $Author: reode_orm $, $Revision: 1.2 $

See Also

Serialized Form

Inner classes inherited from class javax.swing.JFrame

javax.swing.JFrame.AccessibleJFrame

Inner classes inherited from class java.awt.Frame

java.awt.Frame.AccessibleAWTFrame

Inner classes inherited from class java.awt.Window

java.awt.Window.AccessibleAWTWindow

Inner classes inherited from class java.awt.Container

java.awt.Container.AccessibleAWTContainer

Inner classes inherited from class java.awt.Component

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

Fields inherited from class javax.swing.JFrame

accessibleContext, EXIT_ON_CLOSE, rootPane, rootPaneCheckingEnabled

Fields inherited from class java.awt.Frame

CROSSHAIR_CURSOR, DEFAULT_CURSOR, E_RESIZE_CURSOR, HAND_CURSOR, ICONIFIED, MAXIMIZED_BOTH, MAXIMIZED_HORIZ, MAXIMIZED_VERT, MOVE_CURSOR, N_RESIZE_CURSOR, NE_RESIZE_CURSOR, NORMAL, NW_RESIZE_CURSOR, S_RESIZE_CURSOR, SE_RESIZE_CURSOR, SW_RESIZE_CURSOR, TEXT_CURSOR, W_RESIZE_CURSOR, WAIT_CURSOR

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Constructor Summary

Client()
Constructor initializes the gui and prepares for creating a connection to a server

Method Summary

void	actionPerformed(java.awt.event.ActionEvent e) This method handles button pressed events, ie.
static void	main(java.lang.String[] args) This method starts up the client.
void	receiveEvent(CommunicationEvent ce) This interface method is called by communication component class, every time a communication event occurred.
void	receiveEvent(DataEvent de) This interface method is called by the communication component.
void	setDisconnectedState()

Methods inherited from class javax.swing.JFrame

addImpl, createRootPane, frameInit, getAccessibleContext, getContentPane, getDefaultCloseOperation, getGlassPane, getGraphics, getJMenuBar, getLayeredPane, getRootPane, getTransferHandler, isDefaultLookAndFeelDecorated, isRootPaneCheckingEnabled, paramString, processWindowEvent, remove, repaint, setContentPane, setDefaultCloseOperation, setDefaultLookAndFeelDecorated, setGlassPane, setIconImage, setJMenuBar, setLayeredPane, setLayout, setRootPane, setRootPaneCheckingEnabled, setTransferHandler, update

Methods inherited from class java.awt.Frame

addNotify, getCursorType, getExtendedState, getFrames, getIconImage, getMaximizedBounds, getMenuBar, getState, getTitle, isResizable, isUndecorated, remove, removeNotify, setCursor, setExtendedState, setMaximizedBounds, setMenuBar, setResizable, setState, setTitle, setUndecorated

Methods inherited from class java.awt.Window

addPropertyChangeListener, addPropertyChangeListener, addWindowFocusListener, addWindowListener, addWindowStateListener, applyResourceBundle, applyResourceBundle, createBufferStrategy, createBufferStrategy, dispose, getBufferStrategy, getFocusableWindowState, getFocusCycleRootAncestor, getFocusOwner, getFocusTraversalKeys, getGraphicsConfiguration, getIconImages, getInputContext, getListeners, getLocale, getModalExclusionType, getMostRecentFocusOwner, getOwnedWindows, getOwner, getOwnerlessWindows, getToolkit, getWarningString, getWindowFocusListeners, getWindowListeners, getWindows, getWindowStateListeners, hide, isActive, isAlwaysOnTop, isAlwaysOnTopSupported, isFocusableWindow, isFocusCycleRoot, isFocused, isLocationByPlatform, isShowing, pack, postEvent, processEvent, processWindowFocusEvent, processWindowStateEvent, removeWindowFocusListener, removeWindowListener, removeWindowStateListener, reshape, setAlwaysOnTop, setBounds, setBounds, setCursor, setFocusableWindowState, setFocusCycleRoot, setIconImages, setLocationByPlatform, setLocationRelativeTo, setMinimumSize, setModalExclusionType, setSize, setSize, setVisible, show, toBack, toFront

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getAlignmentX, getAlignmentY, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalPolicy, getInsets, getLayout, getMaximumSize, getMinimumSize, getMousePosition, getPreferredSize, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paint, paintComponents, preferredSize, print, printComponents, processContainerEvent, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusTraversalKeys, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setFont, transferFocusBackward, transferFocusDownCycle, 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, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBaseline, getBaselineResizeBehavior, getBounds, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getHeight, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocation, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getSize, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isDoubleBuffered, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isOpaque, isPreferredSizeSet, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, prepareImage, prepareImage, printAll, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, processMouseWheelEvent, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resize, resize, setBackground, setComponentOrientation, setDropTarget, setEnabled, setFocusable, setFocusTraversalKeysEnabled, setForeground, setIgnoreRepaint, setLocale, setLocation, setLocation, setMaximumSize, setName, setPreferredSize, show, size, toString, transferFocus, transferFocusUpCycle

Methods inherited from class java.lang.Object

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

Constructor Detail

Client

public Client()

Constructor initializes the gui and prepares for creating a connection to a server

Pre

true

Post

true

Method Detail

actionPerformed

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

This method handles button pressed events, ie. Connect/Disconnect and send information.

Specified by:

actionPerformed in interface java.awt.event.ActionListener

Pre

true

Post

true

Parameters:

e - ActionEvent object describing which kind of event occurred in the gui.

setDisconnectedState

public void setDisconnectedState()

Obligation

method may not be called

main

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

This method starts up the client.

Parameters:

args - the command line arguments

receiveEvent

public void receiveEvent(DataEvent de)

This interface method is called by the communication component. The implenting class has to register at the specific object of the class ClientConnectionManager.addObserver(DataEventBaseObserver debo) to get notifications about new data events in the event queue. The data is given as argument.

Specified by:

receiveEvent in interface DataEventReceivingObserver

Pre

true

Post

true

Parameters:

de - DataEvent object, encapsulating the transmitted data.

See Also

DataEventObserver.receiveEvent()

receiveEvent

public void receiveEvent(CommunicationEvent ce)

This interface method is called by communication component class, every time a communication event occurred. The implenting class has to register at the specific object of the class ClientConnectionManager.addObserver(DataEventBaseObserver debo) to get notifications about new communication events in the event queue. This is done by calling the method ServerConnectionManager.addObserver(CommunicationEventObserver o) for observing the communication events of the server, respectively the method ClientConnectionManager.addObserver(CommunicationEventObserver o) for the communication events of the client.

Specified by:

receiveEvent in interface CommunicationEventObserver

Pre

true

Post

true

Parameters:

ce - CommunicationEvent which is delivered to the implementor of this interface (ie. the observer).