For the latest stable version, please use Spring AMQP 3.2.1!

Meta-annotations

Sometimes you may want to use the same configuration for multiple listeners. To reduce the boilerplate configuration, you can use meta-annotations to create your own listener annotation. The following example shows how to do so:

@Target({ElementType.TYPE, ElementType.METHOD, ElementType.ANNOTATION_TYPE})
@Retention(RetentionPolicy.RUNTIME)
@RabbitListener(bindings = @QueueBinding(
        value = @Queue,
        exchange = @Exchange(value = "metaFanout", type = ExchangeTypes.FANOUT)))
public @interface MyAnonFanoutListener {
}

public class MetaListener {

    @MyAnonFanoutListener
    public void handle1(String foo) {
        ...
    }

    @MyAnonFanoutListener
    public void handle2(String foo) {
        ...
    }

}

In the preceding example, each listener created by the @MyAnonFanoutListener annotation binds an anonymous, auto-delete queue to the fanout exchange, metaFanout. Starting with version 2.2.3, @AliasFor is supported to allow overriding properties on the meta-annotated annotation. Also, user annotations can now be @Repeatable, allowing multiple containers to be created for a method.

@Component
static class MetaAnnotationTestBean {

    @MyListener("queue1")
    @MyListener("queue2")
    public void handleIt(String body) {
    }

}


@RabbitListener
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Repeatable(MyListeners.class)
static @interface MyListener {

    @AliasFor(annotation = RabbitListener.class, attribute = "queues")
    String[] value() default {};

}

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
static @interface MyListeners {

    MyListener[] value();

}