spring-cloud / spring-cloud/spring-cloud-stream

Accept multiple ListenerContainerCustomizers

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Description

@dsyer commented on Tue Sep 10 2019

Instead of injecting a single (optional) ListenerContainerCustomizer, we could inject an ObjectProvider<Customizer> and iterate over the provided values using ObjectProvider.orderedSteam(). Many customizer extension points in Spring Boot do this.

See https://github.com/spring-cloud/spring-cloud-stream-binder-kafka/issues/741#issuecomment-529867243

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Research direction

Start by locating the ListenerContainerCustomizer injection point in the spring-cloud-stream Kafka binder and review the referenced ObjectProvider approach. Check how existing Spring Boot customizer extension points use ordered streams, then verify that multiple customizers are accepted and applied in order with the relevant tests.

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Assessment

Tech stack
java, kafka, spring
Domain
backend, stream-processing
Issue type
Feature
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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