Spring Integration-Dispatcher没有订阅者

时间：2018-12-03 15:55:33

标签： spring-mvc spring-integration

我正在尝试使用Spring Integration Framework构建一个小型应用程序。我在调用发布请求时遇到了一些异常。 以下是我得到的代码和异常。我可以插入带有此异常的数据。

例外

2018-12-03 23:58:55.659 ERROR 15180 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.messaging.MessageDeliveryException: Dispatcher has no subscribers for channel 'application.resPostMedChannel'.; nested exception is org.springframework.integration.MessageDispatchingException: Dispatcher has no subscribers, failedMessage=GenericMessage [payload=5, headers={content-length=65, http_requestMethod=POST, errorChannel=org.springframework.messaging.core.GenericMessagingTemplate$TemporaryReplyChannel@9135598, accept-language=en-US,en;q=0.9, http_statusCode=200 OK, accept=*/*, replyChannel=org.springframework.messaging.core.GenericMessagingTemplate$TemporaryReplyChannel@9135598, host=localhost:8080, http_requestUrl=http://localhost:8080/medicine, connection=keep-alive, id=b09085f5-7b54-061d-fe1a-f4e98b9de021, cache-control=no-cache, contentType=application/json;charset=UTF-8, accept-encoding=gzip, deflate, br, user-agent=Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Safari/537.36, timestamp=1543861735642}], failedMessage=GenericMessage [payload=5, headers={content-length=65, http_requestMethod=POST, errorChannel=org.springframework.messaging.core.GenericMessagingTemplate$TemporaryReplyChannel@9135598, accept-language=en-US,en;q=0.9, http_statusCode=200 OK, accept=*/*, replyChannel=org.springframework.messaging.core.GenericMessagingTemplate$TemporaryReplyChannel@9135598, host=localhost:8080, http_requestUrl=http://localhost:8080/medicine, connection=keep-alive, id=b09085f5-7b54-061d-fe1a-f4e98b9de021, cache-control=no-cache, contentType=application/json;charset=UTF-8, accept-encoding=gzip, deflate, br, user-agent=Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Safari/537.36, timestamp=1543861735642}]] with root cause

org.springframework.integration.MessageDispatchingException: Dispatcher has no subscribers
at org.springframework.integration.dispatcher.UnicastingDispatcher.doDispatch(UnicastingDispatcher.java:139) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.integration.dispatcher.UnicastingDispatcher.dispatch(UnicastingDispatcher.java:106) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:73) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:451) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:400) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:187) ~[spring-messaging-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:166) ~[spring-messaging-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:47) ~[spring-messaging-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.messaging.core.AbstractMessageSendingTemplate.send(AbstractMessageSendingTemplate.java:109) ~[spring-messaging-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutput(AbstractMessageProducingHandler.java:415) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.integration.handler.AbstractMessageProducingHandler.produceOutput(AbstractMessageProducingHandler.java:334) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutputs(AbstractMessageProducingHandler.java:225) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:129) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:162) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.integration.dispatcher.AbstractDispatcher.tryOptimizedDispatch(AbstractDispatcher.java:115) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.integration.dispatcher.UnicastingDispatcher.doDispatch(UnicastingDispatcher.java:133) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.integration.dispatcher.UnicastingDispatcher.dispatch(UnicastingDispatcher.java:106) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:73) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:451) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:400) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:187) ~[spring-messaging-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:166) ~[spring-messaging-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:47) ~[spring-messaging-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.messaging.core.AbstractMessageSendingTemplate.send(AbstractMessageSendingTemplate.java:109) ~[spring-messaging-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.integration.router.AbstractMessageRouter.handleMessageInternal(AbstractMessageRouter.java:183) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:162) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.integration.dispatcher.AbstractDispatcher.tryOptimizedDispatch(AbstractDispatcher.java:115) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.integration.dispatcher.UnicastingDispatcher.doDispatch(UnicastingDispatcher.java:133) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.integration.dispatcher.UnicastingDispatcher.dispatch(UnicastingDispatcher.java:106) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:73) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:451) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:187) ~[spring-messaging-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.messaging.core.GenericMessagingTemplate.doSendAndReceive(GenericMessagingTemplate.java:233) ~[spring-messaging-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.messaging.core.GenericMessagingTemplate.doSendAndReceive(GenericMessagingTemplate.java:47) ~[spring-messaging-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.messaging.core.AbstractMessagingTemplate.sendAndReceive(AbstractMessagingTemplate.java:46) ~[spring-messaging-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.integration.core.MessagingTemplate.sendAndReceive(MessagingTemplate.java:97) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.integration.gateway.MessagingGatewaySupport.doSendAndReceive(MessagingGatewaySupport.java:503) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.integration.gateway.MessagingGatewaySupport.sendAndReceiveMessage(MessagingGatewaySupport.java:470) ~[spring-integration-core-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.integration.http.inbound.HttpRequestHandlingEndpointSupport.actualDoHandleRequest(HttpRequestHandlingEndpointSupport.java:357) ~[spring-integration-http-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.integration.http.inbound.HttpRequestHandlingEndpointSupport.doHandleRequest(HttpRequestHandlingEndpointSupport.java:256) ~[spring-integration-http-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.integration.http.inbound.HttpRequestHandlingMessagingGateway.handleRequest(HttpRequestHandlingMessagingGateway.java:108) ~[spring-integration-http-5.1.0.RELEASE.jar:5.1.0.RELEASE]
at org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter.handle(HttpRequestHandlerAdapter.java:53) ~[spring-webmvc-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038) ~[spring-webmvc-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) ~[spring-webmvc-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:998) ~[spring-webmvc-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:901) ~[spring-webmvc-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:660) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:875) ~[spring-webmvc-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.12.jar:9.0.12]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) ~[spring-web-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) ~[spring-web-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:770) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]

模型类

@Entity
@Table(name="medicine")
public class Medicine {
@Id
@Column(name="med_id")
@GeneratedValue(strategy=GenerationType.AUTO)
private int medId;

@Column(name="med_name")
private String medName;

@Column(name="exp_date")
private String expDate;

@ManyToMany(cascade = CascadeType.PERSIST, fetch=FetchType.EAGER)
@JoinTable(name="Dose_Medicine", joinColumns= {@JoinColumn(name="med_Id")}, 
inverseJoinColumns= {@JoinColumn(name="dose_Id")})
@JsonIgnore
private List<Dose> doses = new ArrayList<Dose>();

//setter getter
}

剂量模型类

@Entity
@Table(name="dose")
public class Dose {
@Id
@Column(name="dose_id")
@GeneratedValue(strategy=GenerationType.AUTO)
private int doseId;

@Column(name="dose_value")
private String doseValue;

@ManyToMany(cascade = CascadeType.PERSIST, fetch=FetchType.EAGER, 
mappedBy="doses")
@JsonIgnore
private List<Medicine> medicine = new ArrayList<Medicine>();
//setter getter
}

服务激活器

@Component
public class MedicineServiceActivator {
@Autowired
private MedicineService medicineService;
    public MessageBuilder<?> saveMedicine(Message<Medicine> msg) {
    return 
MessageBuilder.withPayload(medicineService.saveMedicine(msg.getPayload()))

.copyHeadersIfAbsent(msg.getHeaders()).setHeader("http_statusCode", 
HttpStatus.OK);
}
}

服务

@Service
public class MedicineService {

@Autowired
private MediceneRepository medicineRepo;
public int saveMedicine(Medicine medicine) {
    medicineRepo.save(medicine);
    return medicine.getMedId();
}
}

存储库

public interface MediceneRepository extends CrudRepository<Medicine, 
Integer> {
}

集成XML 

<int:channel id="reqPutMedChannel" />
<int:channel id="resPutMedChannel" />
<int:channel id="reqPostMedChannel" />
<int:channel id="resPostMedChannel" />
<int:channel id="routeMedRequest" />

<int-http:inbound-gateway
    request-channel="routeMedRequest" 
    supported-methods="POST, PUT" path="/medicine"
    request-payload-type="com.cerner.api.Model.Medicine">

    <int-http:request-mapping consumes="application/json" 
produces="application/json"/>
</int-http:inbound-gateway>

<int:router input-channel="routeMedRequest" 
expression="headers.http_requestMethod">
    <int:mapping value="PUT" channel="reqPutMedChannel" />
    <int:mapping value="POST" channel="reqPostMedChannel" />
</int:router>

<int:service-activator ref="medicineServiceActivator" 
method="updateMedicine" 
    input-channel="reqPutMedChannel" output-channel="resPutMedChannel"/>
<int:service-activator ref="medicineServiceActivator" method="saveMedicine" 
    input-channel="reqPostMedChannel" output-channel="resPostMedChannel"/>

另一个帮助。如果我必须发出POST请求，那么应该是JSON。 提前致谢。 ：）

1 个答案:

答案 0 :(得分：0)

我们看到您有一个<int:service-activator和一个output-channel="resPostMedChannel"。您的配置中还有其他内容可以用作input-channel吗？否则，由于提到的 Dispatcher没有订阅者异常，此DirectChannel确实会失败。

更新

如果要从该<int:service-activator ref="medicineServiceActivator">获得答复作为对该上游HTTP请求的响应，则应考虑完全删除该output-channel="resPostMedChannel"。在这种情况下，您的服务结果将发送到HTTP请求过程中由网关填充的replyChannel标头中：https://docs.spring.io/spring-integration/docs/5.1.1.RELEASE/reference/htmlsingle/#overview-endpoints-service-activator

  

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