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Virtual Controller
Abstract
Virtual Controller: This program allows any computer to control other PCs remotely.
Project aims at administering a remote computer using network communication. The
remote computer acts as client and the controlling computer acts as a server. Any number
of clients can be connected to the server. The core function of client is sending a screen
shot of the clients desktop at a predefined amount of time. For each client a new frame is
generated and the screen shot is displayed at the sever side. The clients control is
communicated in the form of mouse movement and key strokes.
Program Features:
View remote desktop
Mouse movement control
Mouse buttons control
Keyboard control
Modules:
Develop Remote Server
Develop Remote Client
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1. INTRODUCTION
1.1 Purpose
Administration in computer organization is a modern professional responsible for the
maintenance of computer hardware and software that comprises a computer
network. This normally includes the deployment, configuration, maintenance and
monitoring of active Employee function. A related role is that of the network
specialist, or network analyst, who concentrates on network design and security.
Network administrators are responsible for making sure computer hardware and the
network infrastructure itself is maintained properly for an IT organization. They are
deeply involved in the rolling out new software installs, and as well as employee
tasks what actually they are doing in the time of job. But there is a problem to
maintain all networks with one administrator. So our virtual controller program
allows any computer to control other PCs remotely. Project aims at administering a
remote computer using network communication. The remote computer acts as
client and the controlling computer acts as a server.
Any number of clients can be connected to the server. The core function of client is
sending a screen shot of the clients desktop at a predefined amount of time. For
each client a new frame is generated and the screen shot is displayed at the sever
side. The clients control is communicated in the form of mouse movement and key
strokes.
1.2 Scope
Virtual Controller provides some very useful and general important functions for the
administrator to maintain the clients function or tasks in computer network and, in this
application, reduce the burden on administrator work and saving the time for all levels of
network. This the client side, its core function is sending a screen shot of the client's
desktop every predefined amount of time. Also it receives server commands such as
"move the mouse command", and then executes the command at the client's PC. Any
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number of clients can be connected to the server. The core function of client is sending a
screen shot of the clients desktop at a predefined amount of time.
1.3 Project Overview
Although virtual Controller is an innovative application, the modern formulation of it is
often given in terms of the existing system problems, in generally administrators are
responsible for making sure computer hardware and the network infrastructure itself is
maintained properly for an IT organization. They are deeply involved in the rolling out
new software installs, and as well as employee tasks what actually they are doing in the
time of job. But there is a problem to maintain all networks with one administrator. This
is the administrator waits for clients connections and per each connected client, a new
frame appears showing the current client screen. When you move the mouse over the
frame, this results in moving the mouse at the client side. The same happens when you
right/left click mouse button or type a key while the frame is in focus.
1.4 Problem Definition
1.4.1 Existing System
Administrators are responsible for making sure rolling out new software installs,
and as well as employee tasks what actually they are doing in the time of job. But there is
a problem to maintain all networks with one administrator. If admin want to know the
details and the clients tasks he should do manually see and take the information from the
clients or using the Ip address he can connect the system but there is problem will occurs
in the client said like system hanging and etc .
1.4.2 Proposed System
This program allows any computer to control other PCs remotely. Project aims at
administering a remote computer using network communication. The remote computer
acts as client and the controlling computer acts as a server. Any number of clients can be
connected to the server. The modern virtual controller achieves in terms of the existing
system problems, in generally administrators are server part which waits for clients
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connections and per each connected client, a new frame appears showing the current
client screen.
When you move the mouse over the frame, this results in moving the mouse at
the client side. The same happens when you right/left click mouse button or type a key
while the frame is in focus. Client side, its core function is sending a screen shot of the
client's desktop every predefined amount of time. Also it receives server commands such
as "move the mouse command", and then executes the command at the client's PC.
1.4.3 Program Features
View remote desktop
Mouse movement control Mouse buttons control
Keyboard control
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2. MODULE DESCRIPTION
3.1 Modules:
Develop Remote Server
Develop Remote Client.
3.1.1. Remote ServerThis is the server part which waits for clients connections and per each connected
client, a new frame appears showing the current client screen. When you move the mouse
over the frame, this results in moving the mouse at the client side. The same happens
when you right/left click mouse button or type a key while the frame is in focus.
3.1.2. Remote Client
This the client side, its core function is sending a screen shot of the client's
desktop every predefined amount of time. Also it receives server commands such as
"move the mouse command", and then executes the command at the client's PC.
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3. PROJECT REQUIREMENTS AND SPECIFICATIONS
3.1 Operating Environment
Software Requirements are Windows as Operating System, Linux or Mac
operating system, Java 2 standard edition, Java swings.
Hardware Requirements are P2 above processor, 128MB+ of main memory
(RAM) and 100MB hard disk and data base memory with LAN connection or internet
connection.
3.2 Implementation Constraints
This project will be developed using the technologies like Java 2 standard edition,
Java swings. Also well be learning clearly about Software Development Life Cycle.
3.3 Hardware Requirements
Processor:: Pentium-III (or) Higher
Ram:: 64MB (or) Higher Cache:: 512MB
Hard disk:: 40GB
3.4 Software Requirements
Tools:: MicroSoft Front
Operating System:: Windows.NET/2000/XP
Client Side:: GUI
Technologies:: Java, java net and Swings
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4. FEASIBILITY STUDY
4.1 Feasibility Study:
The next step in analysis is to verify the feasibility of the proposed system. All
projects are feasible given unlimited resources and infinite time. But in reality both
resources and time are scarce. Project should confirm to time bounce and should be
optimal in there consumption of resources. The development of computer-based system is
likely to be played by Scarcity of resources and difficulty in completion dates. Feasibility
study is the measure of how beneficial or practical information system will be to an
organization. Further developer would like to finalize the software and hardware
requirements to develop the proposed system. The objective of Feasibility Study is to
evaluate the relevant factors involved in the problem statement, considers preliminary
alternative solutions weakness and advantages, and recommended a feasible solution to
the problem statement.
A feasibility study is an evaluation of a proposal designed to determine the
difficulty in carrying out a designated task. Generally, a feasibility study precedes
technical development and project implementation. The most important phase in a project
development is judging whether the project will be feasible or not. A project developed
which is not feasible will serve no purpose.
Feasibility has applied to virtual controller pertains to the following areas:
Technical feasibility
Operational feasibility
Economical feasibility
4.1.1 Technical Feasibility
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As we are developing this virtual controller Application on Java 2 platform edition which
is an open source and free of cost. Once we started developing this application in Java 2
platform edition then they is no need of purchasing any special software or application
software for support. Java it self provides all necessary functionalities and resources for
developing virtual controller Application. For Example like developing GUI can be
developed by AWT or Swing Framework which is much available in Java.
4.1.2 Operational Feasibility
To determine the operational feasibility of the system we should take into consideration
the awareness level of the users. Users who are using this virtual controller Application
dont require much knowledge of how to use. Just Users should have basic concept of
what is virtual controller? Every thing will be understood by user once he sees the
application.
4.1.3 Economic Feasibility
To decide whether a project is economically feasible, or not we have to consider various
factors as:
Cost benefit analysis
Long-term returns
Maintenance costs
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5. DESIGN OBJECTIVES
Design is the first step in moving from problem domain to the solution domain.
Design is essentially the bridge between requirements specification and the final solution.
The goal of design process is to produce a model or representation of a
system, which can be used later to build that system. The produced model is called the
Design of the System. It is a plan for a solution for the system.
5.1 Unified Modeling language
Unified modeling language is a popular language that has been using for
modeling the object oriented software. It is a language for visualizing, specifying,
constructing and documentation of software artifacts. Object Management Group (OMG)
has first adopted in 1997 as a language for Object-Oriented Analysis and Design. It uses
graphical notations to articulate the software design projects. UML is a very significant
part of development processes. (Grady Booch & Jim Rumbaing, 1994)
These are the artifacts of a software-intensive system.
A Conceptual Model Of Uml:
The three major elements of UML are
The UMLs basic building blocks
The rules that dictate how those building blocks may be put together.
Some common mechanisms that apply throughout the UML.
Relationship In The Uml:
There are four kinds of relationships in the UML:
1. Dependency
2. Association
3. Generalization
4. Realization
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5.1.1 Goals of UML:1. It offers the users to express visual modeling language and ready to use.
2. To extend the core concepts, various extensibility and specialization mechanisms
are provided.
3. Development processes and programming language which are in particular are
made to be independent by the UML design.
4. Necessary understanding of the language is provided formally.
5. Development concepts like components, frameworks, collaborations and patterns.
6. The market of the Object-Oriented tools growth must be encouraged.
5.1.2 UML DIAGRAMS:
Class Diagram:
Class diagrams are widely used to describe the types of objects in a system and their
relationships. Class diagrams model class structure and contents using design
elements such as classes, packages and objects. Class diagrams describe three
different perspectives when designing a system, conceptual, specification, and
implementation. These perspectives become evident as the diagram is created and
help solidify the design. Class diagram tell about the list of classes with their
attributes and methods which are used in each and every module.
Use Case Diagram:
Here user is the main heart of our application and we are providing so many options to
maintain administration functions, for the need to add port number and ip address for the
seeing client system, similarly client also give the port number and ip address .but client
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does not connect the server just giving information to the server. If the ip addresses are
validate then only streaming will continue.
Interaction Diagram
An Interaction diagram shows an interaction, consisting of a set of objects and their
relationships, including the messages that may be dispatched among them.
Interaction diagrams are used for modeling the dynamic aspects of the system.
A sequence diagram is an interaction diagram that emphasizes the time ordering of the
messages. Graphically, a sequence diagram is a table that shows objects arranged alongs
the X-axis and messages, ordered in increasing time, along the Y-axis and messages,
ordered in increasing time, along the Y-axis.
Sequence Diagram:
Sequence diagrams demonstrates the sequential flow of software architecture used in this
application .Sequence diagrams document the interactions between classes to achieve a
result, such as a use case. Because UML is designed for object oriented programming,
this communications between classes are known as messages. The sequence diagrams
lists diagrams lists objects horizontally, and time vertically, and models these messages
over time.
Activity Diagram
An Activity Diagram is essentially a flow chart showing flow of control from activity to
activity. They are used to model the dynamic aspects of as system .They can also be used
to model the flow of an object as it moves from state to state at different points in the
flow of control.
An activity is an ongoing non-atomic execution with in a state machine. Activities
ultimately result in some action, which is made up of executable atomic computations
that result in a change of state of distinguishes a use case diagram from all other kinds of
diagrams is its particular content.
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State Chart Diagram
A state chart diagram shows a state machine .State chart diagrams are used to
model the dynamic aspects of the system. For the most part this involves modeling the
behavior of the reactive objects. A reactive object is one whose behavior is best
characterized by its response to events dispatched from outside its context. A reactive
object has a clear lifeline whose current behavior is affected by its past.
Class Diagram:
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Use Case Diagram:
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Sequence Diagram for Server:
Sequence Diagram for Client:
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Collaboration Diagram:
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Activity Diagram:
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State Diagram:
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Component diagram:
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6. OVERVIEW OF SOFTWARE DEVELOPMENT
TOOLS
The life-cycle paradigm demands a systematic, sequential approach to softwaredevelopment that begins at the system level and progresses through requirements
analysis, design, coding, testing and maintenance.
6.1 Software Development Lifecycle:
a) Analysis Phase:
The analysis phase consists of two sub phases: planning and requirements definition.
During planning the activities that are performed are - understand the customers
problem, developing a recommended solution. Requirements definition is concerned with
identifying the basic functions of a software component in a hardware/software/people
system.
b) Design Phase:
Design is concerned with identifying software components, specifying relationships
among components, maintaining a record of design decisions.
Design consists of architectural design and detailed design.
i) Architectural Design involves identifying the software components, decoupling and
decomposing them in to processing modules and conceptual data structures and
specifying the interconnection between the components.
ii) Detailed Design is concerned with the details of how to package the processing
modules and how to implement the processing algorithms, data structures and
interconnection between them.
c) Implementation Phase:
The implementation phase of software development involves translation of design
specifications source code and debugging, documentation and unit testing of the source
code.
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d) Testing Phase:
It involves two kinds of testing:
i) In integration testing the individual program units or programs are integrated and
tested.
ii) Acceptance Testing involves planning and execution of various types of tests in order
to demonstrate that the implemented software satisfies the stated requirements.
6.2 Java & Its Features:
Java was conceived by James Gosling, Patrick Naughton, Chris
Warth, Ed Frank and Mike Sheridan at SUN Microsystems corporation in the year
1991.It took 18 months to develop the 1st working version. This language was initially
called OAK, but was renamed JAVA in 1995, many more contributed to the design
and evolution of the language.
Java Overview
Java is a powerful but lean object-oriented programming language. It has
generated a lot of excitement because it makes it possible to program for Internet by
creating Applets which are programs that can be embedded in web page. The context of
an applet can be an animation with sound, an interactive game or a ticker tape. With
constantly updated stock prices, applets can be just little decorations to liven up web
page, or they can be serious applications like Word processor or Spreadsheet.
But Java is more than a programming language for writing Applets. It is being used
more and more for writing standalone applications as well. It is becoming so popular that
many people believe it will become standard language for both general purpose and
Internet programming.
There are many buzzwords associated with Java, but because of its spectacular
growth in popularity, a new buzzword has appeared ubiquitous. Indeed, all indications
are that it will soon be everywhere.
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Java builds on the strength of C++. It has taken the best features of C++ and
discarded the more problematic and error prone parts. To this lean core, it has added
garbage collection (automatic memory management), multithreading (the capacity for
one program to do more than one thing at a time), security capabilities. This result is that
Java is simple, elegant, and powerful and easy-to-use.
Java is actually a platform consisting of 3 components:
Java Programming Language
Java Library of Classes and Interfaces
Java Virtual Machine
The following sections will say more about these components.
Java is portable:
One of the biggest advantages Java offers is that it is portable. An
application written in Java will run on all the major platforms. Any computer with a Java-
based browser can run the applications or Applets written in the Java-Programming-
Language. A programmer no longer has to write one program to run on a Macintosh,
another program to run on a Windows-machine still another to run on a UNIX-machine
and so on. In other words, with Java developers write their programs only once.
The Virtual Machine is what gives Java is cross platform capabilities. Rather being
compiled into machine language, which is different for each OSs and computer
architecture, Java code is compiled into Byte codes. With other
Languages, the program code is compiled into a language that the computer can
understand. The problem is that other computers with different machine instruction set
cannot understand that language. Java code on the other hand is compiled into Byte-Code
rather than a machine language. This byte codes go to the JVM, which executes them
directly or translates them into the language that is understood by the machine running it.In summary, these means that with the JDBC API extending Java, a programmer writing
Java code can access all the major RDBMS on any platform that supports the JVM.
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Java is Object Oriented:
The Java programming language is OBJECT-ORIENTED, which makes program
design focus on what you are dealing with, rather than on how your are going to do
something. This makes it more useful for programming in sophisticated projects, because
one can break the things into understandable components. A big benefit is that these
components can then be reused. Object-Oriented Languages use the paradigm of classes. In
simplest term, a class includes both the data and the functions to operate on data. You can
create an instance of a class, also called an object, which will have all the data members and
functionality of its class. Because of this, you can think of a class as being like template, with
each object being a specific instance of a particular type of class.
The class paradigm allows one to encapsulate data so that specific data values are
those using the data cannot see the function implementation. Encapsulation makes it
possible to make the changes in code without breaking other programs that use that code.
If for example, the implementation of a function is changed, the change is
invisible to any programmer who invokes that function, and does not affect his/her
program, except hopefully to improve it.Java includes inheritance, or the ability to derive
new classes from existing classes. The derived class, is also called as Sub-Class, inherits
all the data in the functions of the existing class.
Java Development Environment:
To code, edit, debug and test the java programs, one needs to
have a java development environment. At the minimum this will consists of a java
compiler, interpreter and applet viewer where applets can be tested. Suns java
development kit (JDK) latest version is 2.2 can be freely downloaded from the Internet.
Java compiler is available on DOS, Win95, WINNT, Solaris and MAC etc.
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7.CODE
7.1 REMOTE SERVER:
7.1.1 Serverinitiator:
package remoteserver;
import java.awt.BorderLayout;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import javax.swing.JDesktopPane;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
/**
* This is the entry class of the server
*/
public class ServerInitiator {//Main server frame
private JFrame frame = new JFrame();
//JDesktopPane represents the main container that will contain all
//connected clients' screens
private JDesktopPane desktop = new JDesktopPane();
public static void main(String args[]){
String port = JOptionPane.showInputDialog("Please enter listening port");
new ServerInitiator().initialize(Integer.parseInt(port));
}
public void initialize(int port){
try {
ServerSocket sc = new ServerSocket(port);
//Show Server GUI
drawGUI();
//Listen to server port and accept clients connections
while(true){Socket client = sc.accept();
System.out.println("New client Connected to the server");
//Per each client create a ClientHandler
new ClientHandler(client,desktop);
}
} catch (IOException ex) {
ex.printStackTrace();
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}
}
/*
* Draws the main server GUI*/
public void drawGUI(){
frame.add(desktop,BorderLayout.CENTER);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Show the frame in a maximized state
frame.setExtendedState(frame.getExtendedState()|JFrame.MAXIMIZED_BOTH);
frame.setVisible(true);}
}
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7.1.2 ClientCommandsSender:
package remoteserver;
import java.awt.Rectangle;
import java.awt.event.KeyEvent;import java.awt.event.KeyListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.Socket;
import javax.swing.JPanel;
class ClientCommandsSender implements KeyListener,
MouseMotionListener,MouseListener {
private Socket cSocket = null;
private JPanel cPanel = null;
private PrintWriter writer = null;private Rectangle clientScreenDim = null;
ClientCommandsSender(Socket s, JPanel p, Rectangle r) {
cSocket = s;cPanel = p;
clientScreenDim = r;
//Associate event listners to the panel
cPanel.addKeyListener(this);
cPanel.addMouseListener(this);
cPanel.addMouseMotionListener(this);
try {
//Prepare PrintWriter which will be used to send commands to
//the client
writer = new PrintWriter(cSocket.getOutputStream());
} catch (IOException ex) {
ex.printStackTrace();
}
}
//Not implemeted yet
public void mouseDragged(MouseEvent e) {
}
public void mouseMoved(MouseEvent e) {
double xScale = clientScreenDim.getWidth()/cPanel.getWidth();
System.out.println("xScale: " + xScale);
double yScale = clientScreenDim.getHeight()/cPanel.getHeight();
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System.out.println("yScale: " + yScale);
System.out.println("Mouse Moved");
writer.println(EnumCommands.MOVE_MOUSE.getAbbrev());
writer.println((int)(e.getX() * xScale));
writer.println((int)(e.getY() * yScale));writer.flush();
}
//this is not implemented
public void mouseClicked(MouseEvent e) {
}
public void mousePressed(MouseEvent e) {
System.out.println("Mouse Pressed");
writer.println(EnumCommands.PRESS_MOUSE.getAbbrev());
int button = e.getButton();
int xButton = 16;if (button == 3) {
xButton = 4;
}
writer.println(xButton);
writer.flush();
}
public void mouseReleased(MouseEvent e) {
System.out.println("Mouse Released");
writer.println(EnumCommands.RELEASE_MOUSE.getAbbrev());
int button = e.getButton();
int xButton = 16;if (button == 3) {xButton = 4;
}
writer.println(xButton);
writer.flush();
}
//not implemented
public void mouseEntered(MouseEvent e) {
}
//not implemented
public void mouseExited(MouseEvent e) {
}
//not implemented
public void keyTyped(KeyEvent e) {
}
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public void keyPressed(KeyEvent e) {
System.out.println("Key Pressed");
writer.println(EnumCommands.PRESS_KEY.getAbbrev());
writer.println(e.getKeyCode());
writer.flush();}
public void keyReleased(KeyEvent e) {
System.out.println("Mouse Released");
writer.println(EnumCommands.RELEASE_KEY.getAbbrev());
writer.println(e.getKeyCode());
writer.flush();}
}
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public void run(){
//used to represent client screen size
Rectangle clientScreenDim = null;//Used to read screenshots and client screen dimension
ObjectInputStream ois = null;
//start drawing GUI
drawGUI();
try{
//Read client screen dimensionois = new ObjectInputStream(cSocket.getInputStream());
clientScreenDim =(Rectangle) ois.readObject();
}catch(IOException ex){
ex.printStackTrace();
}catch(ClassNotFoundException ex){ex.printStackTrace();
}
//Start recieveing screenshots
new ClientScreenReciever(ois,cPanel);
//Start sending events to the client
new ClientCommandsSender(cSocket,cPanel,clientScreenDim);
}
}
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7.1.4ClientScreenReciever:
package remoteserver;
import java.awt.Graphics;import java.awt.Image;
import java.io.IOException;
import java.io.ObjectInputStream;
import javax.swing.ImageIcon;
import javax.swing.JPanel;
/**
* ClientScreenReciever is responsible for recieving client screenshot and displaying
* it in the server. Each connected client has a separate object of this class
*/
class ClientScreenReciever extends Thread {
private ObjectInputStream cObjectInputStream = null;
private JPanel cPanel = null;
private boolean continueLoop = true;
public ClientScreenReciever(ObjectInputStream ois, JPanel p) {
cObjectInputStream = ois;cPanel = p;
//start the thread and thus call the run method
start();
}
public void run(){
try {
//Read screenshots of the client then draw them
while(continueLoop){
//Recieve client screenshot and resize it to the current panel size
ImageIcon imageIcon = (ImageIcon) cObjectInputStream.readObject();
System.out.println("New image recieved");Image image = imageIcon.getImage();
image = image.getScaledInstance(cPanel.getWidth(),cPanel.getHeight()
,Image.SCALE_FAST);
//Draw the recieved screenshotGraphics graphics = cPanel.getGraphics();
graphics.drawImage(image, 0, 0, cPanel.getWidth(),cPanel.getHeight(),cPanel);
}
} catch (IOException ex) {
ex.printStackTrace();
} catch(ClassNotFoundException ex){
ex.printStackTrace();
} }}
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7.2 REMOTE CLIENT:
7.2.1 ClientInitiator:
package remoteclient;
import java.awt.AWTException;
import java.awt.Dimension;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Rectangle;
import java.awt.Robot;import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;import java.net.Socket;
import java.net.UnknownHostException;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
/**
*
* This class is responsible for connecting to the server
* and starting ScreenSpyer and ServerDelegate classes
*/
public class ClientInitiator {
Socket socket = null;
public static void main(String[] args){
String ip = JOptionPane.showInputDialog("Please enter server IP");
String port = JOptionPane.showInputDialog("Please enter server port");new ClientInitiator().initialize(ip, Integer.parseInt(port));
}
public void initialize(String ip, int port ){
Robot robot = null; //Used to capture the screen
Rectangle rectangle = null; //Used to represent screen dimensions
try {
System.out.println("Connecting to server ..........");
socket = new Socket(ip, port);
System.out.println("Connection Established.");
//Get default screen deviceGraphicsEnvironment gEnv=GraphicsEnvironment.getLocalGraphicsEnvironment();
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GraphicsDevice gDev=gEnv.getDefaultScreenDevice();
//Get screen dimensions
Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
rectangle = new Rectangle(dim);
//Prepare Robot object
robot = new Robot(gDev);
//draw client gui
drawGUI();
//ScreenSpyer sends screenshots of the client screennew ScreenSpyer(socket,robot,rectangle);
//ServerDelegate recieves server commands and execute them
new ServerDelegate(socket,robot);
} catch (UnknownHostException ex) {
ex.printStackTrace();} catch (IOException ex) {
ex.printStackTrace();
} catch (AWTException ex) {
ex.printStackTrace();
}
}
private void drawGUI() {
JFrame frame = new JFrame("Remote Admin");
JButton button= new JButton("Terminate");
frame.setBounds(100,100,150,150);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.add(button);button.addActionListener( new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
}
);
frame.setVisible(false);
}
}
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7.2.2ScreenSpyer:
package remoteclient;
import java.awt.Rectangle;import java.awt.Robot;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.net.Socket;
import javax.swing.ImageIcon;
/**
* This class is responisble for sending sreenshot every predefined duration
*/
class ScreenSpyer extends Thread {
Socket socket = null;
Robot robot = null; // Used to capture screen
Rectangle rectangle = null; //Used to represent screen dimensions
boolean continueLoop = true; //Used to exit the program
public ScreenSpyer(Socket socket, Robot robot,Rectangle rect) {this.socket = socket;
this.robot = robot;
rectangle = rect;
start();
}
public void run(){
ObjectOutputStream oos = null; //Used to write an object to the streem
try{
//Prepare ObjectOutputStream
oos = new ObjectOutputStream(socket.getOutputStream());
/** Send screen size to the server in order to calculate correct mouse
* location on the server's panel
*/
oos.writeObject(rectangle);}catch(IOException ex){
ex.printStackTrace();
}
while(continueLoop){
//Capture screen
BufferedImage image = robot.createScreenCapture(rectangle);
/* I have to wrap BufferedImage with ImageIcon because BufferedImage class
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* does not implement Serializable interface
*/
ImageIcon imageIcon = new ImageIcon(image);
//Send captured screen to the servertry {
System.out.println("before sending image");
oos.writeObject(imageIcon);
oos.reset(); //Clear ObjectOutputStream cache
System.out.println("New screenshot sent");
} catch (IOException ex) {
ex.printStackTrace();}
//wait for 100ms to reduce network traffic
try{
Thread.sleep(100);}catch(InterruptedException e){
e.printStackTrace();
}
}
}
}
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7.2.3ServerDelegate:
package remoteclient;
import java.awt.Robot;import java.io.IOException;
import java.net.Socket;
import java.util.Scanner;
/*
* Used to recieve server commands then execute them at the client side
*/
class ServerDelegate extends Thread {
Socket socket = null;
Robot robot = null;
boolean continueLoop = true;
public ServerDelegate(Socket socket, Robot robot) {
this.socket = socket;
this.robot = robot;
start(); //Start the thread and hence calling run method
}
public void run(){
Scanner scanner = null;
try {
//prepare Scanner object
System.out.println("Preparing InputStream");
scanner = new Scanner(socket.getInputStream());
while(continueLoop){
//recieve commands and respond accordingly
System.out.println("Waiting for command");
int command = scanner.nextInt();
System.out.println("New command: " + command);
switch(command){case -1:
robot.mousePress(scanner.nextInt());
break;
case -2:robot.mouseRelease(scanner.nextInt());
break;
case -3:
robot.keyPress(scanner.nextInt());
break;
case -4:
robot.keyRelease(scanner.nextInt());
break;
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case -5:
robot.mouseMove(scanner.nextInt(), scanner.nextInt());
break;
}
}} catch (IOException ex) {
ex.printStackTrace();
}
}
}
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8.TESTING
7.1 Software Testing
Software testing is a critical element of software quality assurance and represents
the ultimate review of specification, design and code generation.
7.1.1 Testing Objectives
To ensure that during operation the system will perform as per specification.
To make sure that system meets the user requirements during operation.
To make sure that during the operation, incorrect input, processing and output will
be detected.
To see that when correct inputs are fed to the system the outputs are correct.
To verify that the controls incorporated in the same system as intended.
Testing is a process of executing a program with the intent of finding an error. A good
test case is one that has a high probability of finding an as yet undiscovered error
The software developed has been tested successfully using the following testing
strategies and any errors that are encountered are corrected and again the part of the
program or the procedure or function is put to testing until all the errors are removed. A
successful test is one that uncovers undiscovered error.
Note that the result of the system testing will prove that the system is working
correctly. It will give confidence to system designer, users of the system and prevent
frustration during implementation process etc.
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7.2TEST CASE DESIGN
White Box Testing
White box testing is a testing case design method that uses the control structure of
the procedure design to derive test cases. All independent path in a module are exercised
at least once, all logical decisions are exercised at once, execute all loops at boundaries
and within their operational bounds exercise internal data structure to ensure their
validity. Here the customer is given three chances to enter a valid choice out of the given
menu. After which the control exits the current menu.
Black box Testing
Black Box Testing attempts to find errors in following areas or categories,
incorrect or missing functions, interface error, errors in data structures, performance error
and initialization and termination error. Here all the input data must match the data type
to become a valid entry.
The following are the different tests at various levels:
Unit Testing
Unit testing is essentially for the verification of the code produced during
the coding phase and the goal is to test the internal logic of the module/program. In
the Generic code project, the unit testing is done during coding phase of data entry
forms whether the functions are working properly or not. In this phase all the
drivers are tested they are rightly connected or not.
Integration Testing
All the tested modules are combined into sub systems, which are then tested.
The goal is to see if the modules are properly integrated, and the emphasis being on
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the testing interfaces between the modules. In the generic code integration testing is
done mainly on table creation module and insertion module.
Validation Testing
This testing concentrates on confirming that the software is error-free in all
respects. All the specified validations are verified and the software is subjected to hard-
core testing. It also aims at determining the degree of deviation that exists in the software
designed from the specification; they are listed out and are corrected.
System Testing
This testing is a series of different tests whose primary goal is to exercise the
computer-based system. This involves:
Implementing the system in a simulated production environment and testing it.
Introducing errors and testing for error handling.
7.3 Test Cases
The test cases that are used in the project are:
TEST CASE 1:
Same port number should be entered at both client and server end. Otherwise it displays
Connection Failed error message.
TEST CASE 2:
The IP address of server should be entered correctly at
the clients end. Otherwise error message is displayed.
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8. INPUT & OUTPUT SCREENSHOTS
In this initially user selects the java programming file and those should be in theform of either class files or source files. After that he add the source file and class file and
also set some important setting then select go for processing controller application.
Screen 1:
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Screen 2:
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Screen 3:
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Screen 4:
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9. REQUIRED PACKAGES
import java.awt.AWTException;import java.awt.Dimension;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import java.net.Socket;
import java.net.UnknownHostException;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
When user run server application it should ask listening port
number:
String port = JOptionPane.showInputDialog("Please enter listening port");
new ServerInitiator().initialize(Integer.parseInt(port));
.
.
.
publicvoid initialize(int port){
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try {
ServerSocket sc = new ServerSocket(port);
//Show Server GUI
drawGUI();
//Listen to server port and accept clients connections
while(true){
Socket client = sc.accept();
System.out.println("New client Connected to the server");
//Per each client create a ClientHandler
new ClientHandler(client,desktop);
}
} catch (IOException ex) {
ex.printStackTrace();
}
}
Server Started Successfully:public ClientHandler(Socket cSocket, JDesktopPane desktop) {
this.cSocket = cSocket;
clientName=cSocket.getInetAddress().toString();
System.out.println("new Client is"+clientName);
interFrame= new JInternalFrame(clientName,
true, true, true);
this.desktop = desktop;
start();
}
/*
* Draw GUI per each connected client
*/
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publicvoid drawGUI(){
interFrame.setLayout(new BorderLayout());
interFrame.getContentPane().add(cPanel,BorderLayout.CENTER);
interFrame.setSize(100,100);
desktop.add(interFrame);
try {
//Initially show the internal frame maximized
interFrame.setMaximum(true);
} catch (PropertyVetoException ex) {
ex.printStackTrace();
}
//this allows to handle KeyListener events
cPanel.setFocusable(true);
interFrame.setVisible(true);
}
publicvoid run(){
//used to represent client screen size
Rectangle clientScreenDim = null;
//Used to read screenshots and client screen dimension
ObjectInputStream ois = null;
//start drawing GUI
drawGUI();
try{
//Read client screen dimension
ois = new ObjectInputStream(cSocket.getInputStream());
clientScreenDim =(Rectangle) ois.readObject();
}catch(IOException ex){
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ex.printStackTrace();
}catch(ClassNotFoundException ex){
ex.printStackTrace();
}
//Start recieveing screenshots
new ClientScreenReciever(ois,cPanel);
//Start sending events to the client
new ClientCommandsSender(cSocket,cPanel,clientScreenDim);
}
////eg:ClientCommandSenderClass
publicvoid mouseDragged(MouseEvent e) {
}
publicvoid mouseMoved(MouseEvent e) {
double xScale = clientScreenDim.getWidth()/cPanel.getWidth();
System.out.println("xScale: " + xScale);
double yScale = clientScreenDim.getHeight()/cPanel.getHeight();
System.out.println("yScale: " + yScale);
System.out.println("Mouse Moved");
writer.println(EnumCommands.MOVE_MOUSE.getAbbrev());
writer.println((int)(e.getX() * xScale));
writer.println((int)(e.getY() * yScale));
writer.flush();
}
///Eg:client Screen Receiver class
while(continueLoop){
//Recieve client screenshot and resize it to the current panel size
ImageIcon imageIcon = (ImageIcon) cObjectInputStream.readObject();
System.out.println("New image recieved");
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Image image = imageIcon.getImage();
image = image.getScaledInstance(cPanel.getWidth(),cPanel.getHeight()
,Image.SCALE_FAST);
//Draw the recieved screenshot
Graphics graphics = cPanel.getGraphics();
graphics.drawImage(image, 0, 0,
cPanel.getWidth(),cPanel.getHeight(),cPanel);
Client system is trying to connecting to server system:
Enter server IP Address:
String ip = JOptionPane.showInputDialog("Please enter server IP");
Enter server Port Number:
String port = JOptionPane.showInputDialog("Please enter server port");
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10.CONCLUSION
Virtual Controller provides some very useful and general important functions in
the administration tasks, in this application; The remote computer acts as client and the
controlling computer acts as a server. Any number of clients can be connected to the
server. The modern virtual controller achieves in terms of the existing system problems,
in generally administrators are server part which waits for clients connections and per
each connected client, a new frame appears showing the current client screen. When you
move the mouse over the frame, these results in moving the mouse at the client side.
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11. BIBILIOGRAPHY
1. the JDK1.4 tutorial
Greg Travis
2. Complete Reference Java, 2nd Edition
Herbert Schlitz
3. Core Java Foundation Class
Kim Topley,
4. Java Network Programming
OReilly
5. JAVA how to program
DEITEL & DEITEL
6. The Unified Modeling Language User Guide:
GRADY BOOCH, JAMES RUMBAUGH, IVAR JACOBSON
7. Accessibility and the Swing Set,
Mark Andrews, The Swing Connection, Sun Microsystems, 1999.
http://java.sun.com/products/jfc/tsc/articles/accessibility/index.html
8. Coming Swing API Changes for Java 2 SDK, Standard Edition, v. 1.4,
Connection, Sun Microsystems, 2001. The Swing
http://java.sun.com/products/jfc/tsc/articles/merlin/index.html
9. Component Orientation in Swing,
Ralph Karr
10. The Swing Connection,
Sun Microsystems,1999.
http://java.sun.com/products/jfc/tsc/articles/bidi/index.html11. Core Java Foundation Classes (Core Series),
Kim Topley, Prentice Hall, 1998.
Recommended