GH-1776 - Resolve Rabbit Jackson configuration conflict - #1788
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Order the Jackson 3 configuration before the deprecated Jackson 2 fallback and make both default customizers back off by bean name. Add coverage for Jackson selection, fallback, and user-defined customizers. Signed-off-by: dragonfsky <dragonfsky@gmail.com>
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Fixes #1776.
When Jackson 2 and Jackson 3 mappers are both available, both Rabbit auto-configurations attempt to register the same
rabbitTemplateCustomizerbean.This orders the Jackson 3 configuration before the deprecated Jackson 2 fallback and makes both default customizers back off by bean name. Differently named customizers can still coexist.
Tests
RabbitJacksonConfigurationIntegrationTests: 4 tests passed./mvnw -pl spring-modulith-events/spring-modulith-events-amqp verify: 21 tests passedA broader
-am verifyrun was blocked before reaching the AMQP module by unrelated JDBC V2 schema failures.