- Vert.x 3 users should be guided about how to migrate their applications from Vert.x 3 to Vert.x 4
- Agile migration guide, when users will report feedback about their experience then we will update guide
- Overview
- foremost users need to understand what fundamentally changes between 3 and 4
- Migration process
- two kind of users: those migrating from latest 3 version and other still from a random version
- Components and features
- JSON
- vertx-auth
- Kotlin
- components rewritten in Vert.x 4
- components still in Vert.x 4 but deprecated to use without an alternative in the Vert.x stack (might be elsewhere or later)
- vertx-sync (Loom)
- vertx-service-factory
- vertx-http-service-factory
- vertx-maven-service-factory
- vertx-lang-js (es4x)
- vertx-lang-ruby
- ...
- components with 4.0 breaking changes with a 3.x deprecated API
- clustering migration process