Major migrations made easy
summary
OpenRewrite is an AST‑based refactoring engine that executes reusable recipes to do real migrations in minutes, not hours: it converts JUnit 4 → JUnit 5, updates imports and expected‑exception patterns, migrates Spring Boot 1.5 → latest, and swaps logging like Log4j to SLF4J/Logback. Recipes preserve formatting, use exact type attribution to avoid false matches, run via Maven/Gradle plugin at scale across hundreds or thousands of services, are Apache‑licensed, and some Java 17/Kotlin parsers are still in development.
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chapters (19)
- 0:00Introduction
- 0:42Types of migrations
- 2:07Netflix
- 2:58Spinnaker
- 4:13Features
- 6:22Java visitors
- 6:51File modules
- 7:29Migration recipes
- 7:53How each step is reflected
- 8:29As a separate recipe
- 8:57Converting expected exceptions
- 9:22Running migration recipes
- 10:09Applications of Open Rewind
- 11:16Whats next
- 12:21Open Rewind
- 12:45Open Rewind Company
- 13:11Resources
- 13:54Play around
- 14:20Outro
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