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Spring Boot to Scala and Play on a live site, without losing an email

I replaced this site's Spring Boot backend with Scala 2.13, Play 3, Anorm and Twirl in one pull request. The rewrite was the easy part: this is how I fixed the contracts, kept the outbox wire format, and rehearsed the rollback on a restored production backup.

9 Oct 2026 · 6 min read

#migration
#play-framework
#scala
#scala-play
#spring