listening to rabbit queue

Question

i am listening to rabbit queue via spring-queue and I am getting this error:

org.springframework.amqp.rabbit.listener.exception.ListenerExecutionFailedException: Failed to invoke target method 'orchestrate' with argument type = [class [B], value = [{[B@109a1f6c}] at org.springframework.amqp.rabbit.listener.adapter.MessageListenerAdapter.invokeListenerMethod(MessageListenerAdapter.java:408) ~[spring-rabbit-1.5.6.RELEASE.jar!/:na]

Caused by: java.lang.NoSuchMethodException: com.....method([B)

my method accepts List.

@Bean public SimpleRabbitListenerContainerFactory listenerContainer(){
SimpleRabbitListenerContainerFactory factory = new 
SimpleRabbitListenerContainerFactory();
factory.setConnectionFactory(rabbitConnectionFactory());
factory.setMessageConverter(new Jackson2JsonMessageConverter());
} 
@Bean public MessageListenerAdapter newTest() { 
return new MessageListenerAdapter(testing, "method"); 
}

---

Answer 1

You need to show your testing.method().

Also, the Jackson2JsonMessageConverter requires the content type header to contain json, such as application/json.

It also needs some type information in headers so it knows what type to convert to; otherwise you'll just get a Map.

Consider using the @RabbitListener annotation instead, and upgrade to a newer version of Spring AMQP (the current version is 1.7.3); the type information for the @RabbitListener method is conveyed to the converter.