Great joy in the development team of a customer project: JBoss 8 and Java 17 finally get the sluggish infrastructure moving. Great joy is followed by sheer horror on the part of the project management when it becomes clear how much effort is involved in migrating the Java 8 applications. Many other teams will have a similar experience to us, but there is a way through the confusion.

With Eclipse Transfomer, Spring Boot Migrator and OpenRewrite, there are tools to help teams carry out large migrations. We used them to migrate our applications from Java EE 7 and Spring Boot 2.6 to Spring Boot 3.2 and Jakarta EE 10. At the end, we had five technologically modernized applications and still enough time to implement further features.

In this session, I would like to share my experiences from several tool-supported migrations. The participants can expect a comparison of the alternatives, pitfalls found and tips from the practice of a migration engineer.

And session about the joy and pain of Migration Engineering for Enterprise projects.