Open Rewrite – Dive in Automated Refactoring
summary
Automated refactorings with Open Rewrite apply repeatable, behavior-preserving changes using a catalog of YAML declarative recipes, reaster templates and full Java (imperative) recipes; it runs via Maven/Gradle plugins or the Modern cloud, produces patches and opens PRs, and resolves classpath from the pom. Real examples: JUnit4→Jupiter conversions, Spring Boot upgrades (compose to 3.2), annotation removals and argument flips; small edits that cost ~10–50 minutes each get batched so migrations scale while still requiring human review.
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chapters (9)
- 0:00The need for modernization
- 2:27Challenges in migration
- 5:49Introduction to OpenRewrite
- 14:12Tooling and ecosystem
- 17:23Live demonstration
- 22:09Creating custom recipes
- 28:05Internal mechanics
- 33:22Community and next steps
- 36:01Q&A session
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