RealTime group editors

grapedraughtΛογισμικό & κατασκευή λογ/κού

2 Δεκ 2013 (πριν από 3 χρόνια και 9 μήνες)

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IGSLABS Technolog
ies Pvt Ltd

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RealTime group editors

INTRODUCTION

Group editors are a classic model and research vehicle for distributed interactive
groupware applications because they typically manipulate shared data in a
coordinated manner. Operational transformation (OT) has been we
ll accepted in
group editors for achieving optimistic consistency control OT allows local operations
to execute in a
non
-
blocking

manner to achieve high local responsiveness and
unconstrained collaboration. Remote operations are transformed before they are

executed such that inconsistencies are repaired.

Despite the significant progress that has been achieved over the past 15 years, a
notable fact in the history of OT is that the discovery and solution of various OT
puzzles (i.e., correctness problems in p
revious OT algorithms) have been a main
driver of research. However, the existence of OT puzzles can be largely attributed to
the lack of a suitable theoretical framework for guiding the design and verification of
OT algorithms. More specifically, the well
-
established frameworks rely on conditions
that are difficult to verify in practice and do not address how to develop correct OT
algorithms. In this project, a novel operation transformation framework is developed
to overcome the weakness of existing syste
m. Based on a concept called “operation
effects relation,” defined two criteria, causality preservation and operation effects
relation preservation, for verifying the correctness of OT algorithms.

SYSTEM ANALYSIS

EXISTING SYSTEM

1.

In existing system the gro
up editors can work only by request
-
response
process.

2.

So it has a problem of consistency control and takes more time to process
group editors.

3.

There is no tool like sharing of graphical data.

4.

There is no system to have a shared network that facilitates wit
h editing
graphical data.

5.

Operation transformation allows local operations to execute in a non
-
blocking
manner to achieve high local responsiveness and unconstrained collaboration.
IGSLABS Technolog
ies Pvt Ltd

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Remote operations are transformed before they are executed such that
incon
sistencies are repaired.

6.

The existence of operation transformation puzzles can be largely attributed to
the lack of a suitable theoretical framework for guiding the design and
verification of operation transformation algorithms.

7.

Traditional consistency c
ontrol methods such as locking and serialization
generally sacrifice responsiveness and concurrency when they are pessimistic
and may cause the loss of interaction results when optimistic.

PROPOSED SYSTEM

1.

The proposed system consists of novel operation tra
nsformation
Framework to address this weakness of previous system Based on a
concept called “operation effects relations”.

2.

System consists of two criteria, causality preservation and operational
effects relation preservation for verifying the correctness o
f operation
transformation algorithms.

3.

Sufficient condition for transformation function are identified and second
special operational path is chosen to satisfy the condition.

4.

This framework comes with a practicable approach to developing and
proving operat
ion transformation algorithms.

5.

The basic idea of operation transformation 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 been
executed l
ocally before its execution.

6.

The general assumption underlying interactive groupware applications,
such as group editors, is that users are aware of the changes made by
collaborators and are able to discover and resolve semantic conflicts in a
timely mann
er.

7.

Two transformation frameworks have been proposed in the literature.

8.

The first transformation framework is established with formalizes two
consistency criteria, causality preservation and convergence. In the
approach part, it proves that any operation
transformation
-
based
IGSLABS Technolog
ies Pvt Ltd

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algorithm can achieve convergence in the presence of arbitrary
transformation paths.

9.

The second framework is established with three consistency criteria:
causality preservation, convergence, and intention preservation (CCI). The
intent
ion preservation condition is the first attempt in the literature to
explicitly constrain convergence in interactive groupware.


HARDWARE SPECIFICATION

Processor



:

Any Processor above 500
MHz

Ram




: 128 MB.

Hard Disk



: 10 GB.

Compact Disk


: 650
MB.

Input device



: Standard Keyboard and Mouse.

Output device


: VGA and High Resolution Monitor.

SOFTWARE SPECIFICATION

Operating System


: Windows 2000 server Family.

Techniques



: JDK 1.5

Front
-
end



: Java Applets