Spring Integration with Jackson ObjectMapper and Java 8 Time (JSR-310)

Question

I am struggling with configuring a \"custom\" ObjectMapper to be used by the Spring Integration DSL transformers. I receive an java.time.Instant json representation

Answer 1

There is nothing to do with the Spring Boot on the matter to force Spring Integration to use that.

You just need to configure JsonToObjectTransformer with that your jsonObjetMapper():

@Bean
@Transformer(inputChannel="input", outputChannel="output")
JsonToObjectTransformer jsonToObjectTransformer() {
    return new JsonToObjectTransformer(jsonObjectMapper());
}

Although there is no reason to register JsonObjectMapper as a bean.

Answer 2

Have you defined an encoder to your channel adapter?

You should always use an encoder for whichever adapter you're using, inbound channel adapter or message drive channel adapter.

In your case StringEncoder should solve the problem.

<bean id="myEncoder" class="org.springframework.integration.kafka.serializer.common.StringEncoder"/>