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https://issues.apache.org/jira/browse/CAMEL-15686?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17213723#comment-17213723
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Claus Ibsen commented on CAMEL-15686:
-------------------------------------
Can you try with 3.5 or the 3.6 when its released. It works in an endpoint-dsl
route builder. And although you are using bean inject then it may work there
too.
> Enable EndpointDSL with simple expressions within an Endpoint Builder bean
> --------------------------------------------------------------------------
>
> Key: CAMEL-15686
> URL: https://issues.apache.org/jira/browse/CAMEL-15686
> Project: Camel
> Issue Type: Improvement
> Components: camel-endpointdsl
> Environment: Experienced with
> * Camel 3.3
> * Spring Boot 2.3.4
> Reporter: Franky Georg
> Priority: Minor
>
> Injecting an EndpointProducerBuilder bean that uses a simple expression
> causes an exception.
> {code:java}
> @Autowired
> @Qualifier("publishToKafkaEndpoint")
> EndpointProducerBuilder publishToKafkaEndpoint;
> @Bean
> org.apache.camel.builder.EndpointProducerBuilder publishToKafkaEndpoint() {
> return kafka("${exchangeProperty.destination}");
> }{code}
> Exception from org.apache.kafka.clients.Metadata:
> {code:java}
> Metadata response reported invalid topics
> [${exchangeProperty.destination}]{code}
>
> It _does_ work for static endpoints:
> {code:java}
> return kafka("myTopic"); // This works fine from an
> EndpointProducerBuilder bean{code}
> And it _does_ work for dynamic endpoints in URI form:
> {code:java}
> return "kafka:${exchangeProperty.destination}"; // This works fine but
> you lose type safety{code}
>
> Creating beans like this is useful for unit testing as they can be overridden
> to return mock/direct/whatever-is-useful, _without_ _first creating the
> original endpoint_, which can significantly reduce execution time.
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