Spring Integration Essentials

Using annotations

Spring's power comes from converting simple Java classes to specific components without extending or implementing external classes. To define routers, we can leverage the framework's @Router annotation. We can annotate any method with @Router, and can use its reference. Let's take an example where we want to route our feed based on the author:

@Component
public class AnnotatedFeedsAuthorRouter {
  @Router
  public String feedAuthor(Message<SoFeed > message) {
    SoFeed sf = message.getPayload();
    return sf.getAuthor() ;
  }
}

The return value is a string that is the author's name—a channel with the same name must be present. Alternatively, we can return MessageChannel or a list of MessageChannel references directly.