Open World Forum 2009 Migration With Telosys

How to migrate from client/server to Java/Web ?

Laurent Guérin. SOGETI : National Practice Leader "Open Solutions" . OW2 : Telosys project leader [email protected]

Telosys use case

Laurent Guérin - 2 octobre 2009 22

The context


The company

• Activities & key figures ( year 2008 ) :

� Activities :

- Security 80 %( workplaces protection )

- Technology

- Logistics

- Mobile security

- Other …

� Size : 6400 employees

� Turnover : 214 million €

� Location : France & Belgium


The software ( the "old" application )

• Classical "client/server" application (Visual Basic) with a relational database

• Used by security officers to manage a workplace supervision

� Events

� Team

� Equipments

� Logging

� etc...

• Multilingual (French, English, Dutch)

• Installed on each site


The initial situation ( Client / Server )

Installation required on each site !

Installation& update

Relational Database

Application+ runtime





IT Resources management !

Runtimes !

Not accessibleout of the VPN

The number of sitesis growing quickly2007 =

3 x nb of sites

in 2006


The target ( new Web application )

Database Server

Open architecture( �� extranet ? )

Application Server

Standardenvironment :. http. HTML. XML. Java. etc …

�� Potential R.O.I.

Potential new peripherals

"Online application" accessible via a browser

Nothing to install

http

Lightweight client


The problematic

• Technical migration ( + few evolutions )

� No real functional value added

� Main goal : reduce the cost of the IT resources management

• => The R.O.I. depends on the project efficiency : productivity required !

• The user experience must be preserved

� => good user interface

� => list of events must be up to date on the screen

� etc …

AJAXneeded


The migration


Project based on Open Source software

• Infrastructure & middleware

� Linux

� Apache

� Tomcat

� MySQL

• Java framework

� Telosys framework

• IDE

� Eclipse

� Telosys tools (plugins)

100 %free

100 %simple

Cost ��

Efficiency ��

LGPL


Why Telosys ?

10


Telosys framework

• Telosys is a "global framework"( "full-stack" / "multi-aspects" framework )

Only one ".jar" file ( telosys.jar )

"Keep it simpleand pragmatic"


Telosys framework : the "only" framework

12


ScreenData

Telosys framework : the screens

13

<%@ taglib uri="/telosys/widgets" prefix="t" %><t: screenbody data= "employe" >

<t: label x="40" y="60" txt="Code : " cl="PK_field_label" / > <t: label x="40" y="100" txt="Name : " />

<t: field x="200" y="60" id= "code" data=" #" size="6" maxlength="6" /> <t: field x="200" y="100" id= "name" data=" #" size="30" maxlength="30" />

<t: button x="460" y="100" id="b1" txt=“My button" onclick="…" />

</t: screenbody >

. code

. name"employe"

"societe"

"xxxx"

DAO

mappingEMPLOYE. Code. Name

ScreenManager

XML / http

<employecode="" name="" />

JSP + taglib

ScreenMap

GeneratedJavaBean( POJO )

Client/Server dialog based on AJAX=> Well suited for

C/S migration

Very close toClient/Serverscreens definitions

Example :

V.B. ".frm"

Based on "widgets"

GeneratedDAO

No HTML


Telosys tools : code generation

14

Templates

FullJava

Classes

Generation

Generation

Reliable(alwaysup to date)Database

Templates

JavaClasses

Skeletons

FullCRUD

Screens

plugins

Reposi-tory

(XML)

The existing

C/Sdatabase

TelosysWizards

The code generation improve dramaticallythe productivity


Telosys tools : a short demo ...

How to …

2 – generate all the "Data Access Layer"

1 – generate the lightweight repository


The benefits

• High productivity� Global �� simple & efficient

� Code generation

• Screens behavior � Very close to original C/S screens

� Good user experience

� Natively based on AJAX

� Client/server dialog

• High performances � Scalability

• Natively multilingual

workload gain :from 20% to 40%


Generalization & extensions

• Visual Basic

• Power Builder

• NSDK / NatStar

• Delphi

• WinDev

• Oracle Forms

• etc …

All client/server applications based on a relational database can be migrated in the same way

New tools :automaticscreenstransfor-mation

Same DB


Reliableframework

Efficienttools

Questions ?


Web links

• OW2 : http://www.ow2.org

• Telosys : http://telosys.ow2.org

• Telosys LinkedIN group :

http://www.linkedin.com/groups?gid=1340197