如何自動裝配Spring Stream Cloud綁定

Question

我在application.yml定義了error和notification綁定

cloud:
  stream:
    bindings:
      error:
        destination: error
        binder: default
      notification:
        destination: notification
        binder: default

如何在組件中獲取這些bean？

我嘗試了這種方法：

@Component
class MyComponent {

   @Autowired
   @Qualified("notification")
   MessageChannel notificationChannel;
}

但是沒有找到notificationChanel 。

更新 cloud.stream.bindings.*僅允許配置通道。 但是不會創建它。

Answer 1

您確定您具有@EnableBinding和適當的接口來聲明@Input或@Output嗎？

https://docs.spring.io/spring-cloud-stream/docs/Chelsea.SR2/reference/htmlsingle/index.html#_declaring_and_binding_channels

public interface Barista {

    @Input
    SubscribableChannel orders();

    @Output
    MessageChannel hotDrinks();

    @Output
    MessageChannel coldDrinks();
}

...
@EnableBinding(Barista.class)
public class CafeConfiguration {