vaadin / vaadin/spring

Vaadin doesn't recognize MessageChannel in Spring Boot 2

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Dominant language
Java
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186
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Description

Hello, after upgrading to Spring Boot 2, channel is not registered in class with Vaadin's annotations. When I switch these annotations to @Component then it works but I need this method in Vaadin class. Is there any work around?

@SpringComponent
@UIScope
public class AdFetcher extends Grid<Ad>
{
    @StreamListener
    public void fetchAdsFrom(@Input(OffersChannel.OFFERS_OBTAIN) Flux<Ad> fluxAd)
    {
        fluxAd.subscribe(super::setItems);
    }
}

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  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the AdFetcher example and investigate how @SpringComponent and @UIScope classes are registered after upgrading to Spring Boot 2, comparing that path with @Component. No repository file or test is named; done means a Vaadin-annotated class can receive the @StreamListener MessageChannel without switching to @Component.

Written by the indexing model from the issue text.

Assessment

Tech stack
java, spring, spring-boot
Domain
backend
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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