Question

升级到Spring Boot 2.1.6.RELEASE后，应用程序启动失败，并显示以下信息：

org.springframework.cloud.stream.binder.AbstractMessageChannelBinder中的字段集成流只需要一个bean，但是找到了2个：...

我正在尝试使用IntegrationFlowContext类手动注册流。

@Component
public class FlowCreator{

  @Autowired
  private IntegrationFlowContext flowContext;

  @Autowired
  private FlowExample flowExample;


  @PostConstruct
  public void registerIntegrationFlows() {

    flowContext.registration(flowExample.integrationFlow1())
    .id("integrationFlow1")
    .register();

    flowContext.registration(flowExample.integrationFlow2())
    .id("integrationFlow2")
    .register();
}

@Component
public class FlowExample {

  public IntegrationFlow integrationFlow1() {
    return IntegrationFlows.from("input")
        .<Object, Class<?>>route(Object::getClass, routeMessages()) //
        .get();
  }

  private Consumer<RouterSpec<Class<?>, MethodInvokingRouter>> routeMessages() {
    return m -> m //
        .subFlowMapping(Boolean.class, subFlow1()) 
        .subFlowMapping(Integer.class, subFlow2())
        .defaultOutputChannel("discardChannel");
  }

  private IntegrationFlow subFlow1() {
    return sf -> sf.channel("Channel1");
  }

  private IntegrationFlow subFlow2() {
    return sf -> sf.channel("Channel2");
  }

  public IntegrationFlow integrationFlow2() {
    return IntegrationFlows.from("input")
        .channel("channel3")
        .get();
  }
}

现在出现以下错误：

org.springframework.cloud.stream.binder.AbstractMessageChannelBinder中的字段集成流只需要一个bean，但是找到了2个：

integrationFlow1.subFlow＃0：定义为空
integrationFlow1.subFlow＃1：定义为空

Answer 1

该问题已在Spring Cloud Stream 2.1.1：https://github.com/spring-cloud/spring-cloud-stream/commit/794c75f5364b51d7ec89335b08bfaca0f6d4d139#diff-737803e2a91ac21a17baf06ff7b4cbac中修复。

考虑升级到Fishtown SR3，甚至升级到Germantown GA：https://spring.io/projects/spring-cloud-stream#learn

手动注册弹簧积分流和多个子流

1 个答案: