Migration of a J2EE EJB 2 application JBoss to EJB 3 Wildfly

The goal of the project was to lift an aging Java application architecture to a newer technical level. In detail, it was about the replacement of Entity Beans by the Java Persistence API.

100% J2EE

Experience with J2EE, EJB, JPA, JBoss and Wildfly

5 to 12

Time-critical since “End of Life” of the support

100% Uptime

Migration of the running productive software

100% J2EE

Experience with J2EE, EJB, JPA, JBoss and Wildfly

5 to 12

Time-critical since “End of Life” of the support

100% Uptime

Migration of the running productive software

Challenge

In addition to the incompatibilities of the libraries used, a particular challenge was to maintain the model-driven approach to the creation of the persistence layer that had been pursued over the last 10 years. At the same time, the architecture had to be changed from EJB2 to EJB3.

Technology break in the transition from EJB 2 to EJB 3
Reduce manual migration
Avoid manual transmission errors

big project, many classes and lines of code
comprehensive data model
Get developers mentally in tune with EJB 3 (cut off old habits)

Realization

Familiarization with the project using reverse engineering methods. Step-by-step pragmatic conversion of the individual components.

Removing the EJB 2 Persistence Beans
Manual migration of a use case
Proof of concept: use case on new technology functional
Conversion of the generation of EJB’s to POJO classes

Removing the EJB 2 Persistence Beans
Manual migration of a use case
Proof of concept: use case on new technology functional
Conversion of the generation of EJB’s to POJO classes

App Development Software Development IT Consulting BITS GmbH

App Development Web Development Software Development Programmer BITS GmbH

Project roles at a glance

BITS experts took on the following roles in this project.

IT Project Management
Senior IT-Consulting / Consulting
IT Quality Assurance

Senior Java Architecture
Senior Java Development
Senior Oracle Database Development

Tools & Technologies

The following tools and technologies were used in this project.

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