interactive group editor

8/2/2019 Interactive Group Editor

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CONTENTS

Introduction Overview



Introduction

• Group editors allow a group of distributed

human users to edit a shared document at the

same time.

• It consists of a few users who use the editor

simultaneously on different systems. The user

can chat with other users through the

coordinator. This chatting is processed byindividual or multicasting.



• The main purpose of Internet-based

applications, such as Group Editors, is to

promote the productivity of human users as agroup.

• Group Editors are a classic model and researchvehicle for distributed interactive groupware

applications because they typically manipulate

shared data in a coordinated manner



Overview

• A Group Editor is a groupware application that

allows a distributed group of human users to

edit a shared document over a computer

network.

• Real-time group editors allow a group of users

to view and edit the same document at the

same time from geographically dispersed sitesconnected by communication networks



•

Remote operations are transformed before theyare executed such that inconsistencies are

repaired.

•

Operational Transformation seems a promisingconsistency control method that is able to

achieve high responsiveness, high

concurrency, and convergence while

preserving interaction results and operation

intentions.



• Drawing pad can be created to get drawing

object from user and it is used to share

resources in distributed environment.• The position of the object present in the

drawing pad can be identified and also height

and width of the object drawn in the drawingpad can be measured.

• Then the input object can be distributed to

corresponding receiver or to all the receiversby effective synchronization.



Literature Survey

• The Java Programming Language

The Java programming language is a high-levellanguage that can be characterized by all of the

following buzzwords:• Simple and powerful

• Architecture neutral

• Object oriented

•

Safe• Interpreted and high performance

• Interactive

• Robust



• The Java programming language is unusual

in that a program is both compiled and

interpreted.

•

With the compiler, first you translate aprogram into an intermediate language

called Java byte codes -the platform-

independent codes interpreted by theinterpreter on the Java platform.



• The interpreter parses and runs

each Java byte code instruction onthe computer.

Compilation happens just once,

interpretation occurs each time the

program is executed. The followingfigure illustrates how this works:



Myprgm.java

CompilerMyprgm.class

interpreter

Myprgm

bytecode

Generation of bytecode



The Java Platform

• A platform is the hardware or software environment inwhich a program runs. The Java platform has twocomponents:

• The Java Virtual Machine (JVM)

• The Java Application Programming Interface (JavaAPI)

• Java byte codes help make “write once, run

anywhere” possible. The program can be compiled intobyte codes on any platform that has a Java compiler.The byte codes can then be run on any implementationof the Java Virtual Machine.



Existing System

• In the existing system, the group editors can

work only by request-response process.

• It has a problem of consistency control and

takes more time to process group editors.



Proposed System

• The proposed system consists

of the OT Framework

to address the weakness in theexisting system.



The system consists of two criteria:

Causality preservation

Operational effects preservation

for verifying the correctness of Operational

Transformation.



• The basic idea of OT is to execute any

local operation as soon as it is generated

for high local responsiveness.

• Remote operations are transformed against

concurrent operations that have beenexecuted locally before its execution.

• Users are aware of the changes made by

collaborators and are able to discover andresolve semantic conflicts in a timely

manner.



Architectural Design

• The architectural design process is

concerned with establishing a basic

structural framework for a system. It

involves identifying the major

components of the system and thecommunications between these

components.



Hardware Requirements

•Hard disk : 1GB

• RAM : 512MB

Software Requirements

• Java 1.5 or above

• Windows 98 or above



System Requirements Specification

Functional Requirements• The client shall be able to communicate with

other clients using text chat.

• All the clients connected to the coordinator canedit a shared image.

• The system shall provide the users to view thechanges made to the document.

Non-functional Requirements• Response time and the speed of execution of the

system



Modules MODULES

Coordinator

ClientDrawing

pad

Text chat



Co-ordinator

• The basic function of a coordinator is to

establish connection between clients.

• Only the coordinator has the privilege to

upload images.

• The coordinator can also disconnect any client

or all the clients connected. It can also end all

the sessions without any notification.



Client

• All the clients connected to the coordinator can

play sender or receiver.

• The clients can send text messages, edit the

image uploaded by the coordinator, draw or

paint, modify and send it to other clients.



Coordinator

Synchronize

and transferobject

Synchronize

and transferobject



Drawing Pad

• While sending an image the position of theobject in the drawing pad as well as the heightand width of the object drawn in the drawing

pad are considered.• The object transmitted is placed at the exact

position of the drawing pad on the receiver endand is drawn as received from the sender. Toaccomplish this, Operational Transformation isemployed.



Text Chat

• Text chat option is provided in the project to

communicate with the other clients connected.

• The client can send the message to every other

client connected or to any specific recipient.

• When the text chat is selected, required

sockets are invoked which reads the text from

the keyboard and send it to the recipient

C



Conclusion

The application has been developed in order to facilitate two or more

users to edit a shared document irrespective of the geographicalconstraints at the same time. The approach we have used here is

Operational Transformation (OT) which is a well established method for

consistency control. It typically replicates the shared document and

allows any user to edit any part of the document at any time. editing

operations are executed often without being delayed or blocked. Any

conflicts are reduced in a timely manner. The Group Editor also allows

the user to chat with other users in a distributed environment.

Furthermore, this system supports editing of graphical data.It is a team activity based on a creative thought. It is user friendly and

easy to handle.

Thus it provides the user with a much easier and faster way to

communicate.



THANK

YOU

interactive group editor

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