EJOSA - Enterprise Java Open Source Architecture

EJOSA (Enterprise Java Open Source Architecture) is a project supporting the effective development of J2EE-based web applications. The project is a "starter kit" and "best practices kit" which can be used as a good starting point. It offers a solution how to overcome the complexity of J2EE application development by using the Open Source products Enhydra and JOnAS. So EJOSA can also mean Enhydra and JOnAS Application, because we use Enhydra and JOnAS as our main components. The target audience of our project are developers with basic knowledge of J2EE, Enhydra and JOnAS developers or developers interested in:

The SourceForge project

The SourceForge project for EJOSA contains all the needed links for mailing lists, News, CVS access and Downloads.

EJOSA Template combines Model Driven Architecture (MDA) and the Sourcecode Centric Development (SCD) model. It allows you to integrate both models in one environment to get the best of both worlds. It is very important to integrate the modelling part of the components directly into the developer's compile, run and test cycle.

The EJOSA project uses a template model for developing a multi-tier architecture. EJOSA template provide a collection of Open Source components which are bundled together and already pre-configured, so there is no need to write all the components once more. It also defines an easy to understand structure to be followed by the development of J2EE applications. EJOSA does not use an IDE, wizards or assistants. This means the users need to understand the whole process before they can develop their own J2EE application. EJOSA can be used to make a prototype fast and easily without having to throw away the prototype result for continuing the project. So we keep EJOSA Template simple.

Articles about EJOSA

Technology - What is EJOSA Template ?

OMG best practices for MDA

Use of EJOSA in different information systems

EJOSA can be used to create transactional business applications (OpenUSS, mdaVOFI, etc.). For this purpose it uses AndroMDA general Model-Text/Code cartridges (transformation definitions) which are using following language elements e.g. <<Service>>, <<Entity>> and <<Identifier>>, for building J2EE transactional applications. This is the scope of EJOSA application variants.

Further you can build your own variants by defining your own application scope. An example for this purpose is the product family mdaVOFI which may consist many of VOFI variants (end products). These variants serve as the scope of mdaVOFI. In mdaVOFI you also have a VOFI language which is using following language elements e.g. <<VoofiVofi>>, <<VoofiPeriod>> and <<VoofiPayment>>. To be able to have an executable code you need to transform the VOFI language into a general transactional business application language based on the language elements described by AndroMDA (see above). To implement this, EJOSA uses Model-Model cartriges (transformation defiinitions) which is based on MTL and/or ATL.

Persons

Lofi Dewanto
University of Muenster
Assistant researcher at the Institute of Business Informatics and Controlling
Chairmans - Prof. Dr. Heinz Lothar Grob

His experience in programming began 20 years ago with Basic for IBM Compatible PC/XT. After he finished his study at Business Informatics Faculty at the University of Muenster, he is working as assistant researcher at the Intitute of Prof. Dr. H. L. Grob. In his spare time he writes articles for German "Java Magazin", "Der Entwickler" and "Linux Enterprise".
http://members.tripod.com/~dewanto

Torsten Menzel
Leipzig University of Applied Sciences
Free staff at the Institute of Information Systems and Multimedia Technology
Chairman - Prof. Dr. K. Hänßgen

Torsten Menzel is working at the Leipzig University of Applied Sciences together with Prof. Dr. K. Hänßgen from the Institute of Information Systems and Multimedia Technology. His research interest concentrates on internet technologies, e.g. Java, XML, web graphics and open source databases. Torsten is developer and designer of EJOSA and OpenUSS.

Arturo Morales and Ricardo Beltran
National University of Pedagogy in Mexico City.

Alfred Madl
CEO from Together Teamlösungen in Austria. He is also the software architect and project manager of Enhydra. He is the advisor and consultant for EJOSA.

All OpenUSS developers are also working for EJOSA!

EJOSA Development Roadmap

EJOSA project Sponsorship and Copyright

Sponsored by Lofi Dewanto and Torsten Menzel, © 2001-2005 Lofi Dewanto.