IneligibleMethodException:发现多个参数类型候选- Spring Integration.<

Question

我使用

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-integration</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.integration</groupId>
<artifactId>spring-integration-http</artifactId>
</dependency>

我有这个控制器，在那里我收到了一个路径变量和请求体

@PatchMapping("/applications/{applicationId}/disclosure")
public void piSubmission(@PathVariable(value = "applicationId") String applicationId,
@RequestBody DisclosureInfo disclosureInfo) {
disclosureGateway.process(applicationId, disclosureInfo);

}

我使用网关初始化进程，所以我传递给它2个值

@MessagingGateway
public interface DisclosureGateway {

@Gateway(requestChannel = "disclosure")
void process(String applicationId, DisclosureInfo disclosureInfo);


}

但是我得到了以下错误

Caused by: java.lang.IllegalArgumentException: org.springframework.integration.handler.support.MessagingMethodInvokerHelper$IneligibleMethodException: Found more than one parameter type candidate: [java.lang.String] and [v3.b.engine.domain.kernel.DisclosureInfo]
at org.springframework.integration.handler.support.MessagingMethodInvokerHelper.createHandlerMethod(MessagingMethodInvokerHelper.java:396)
at org.springframework.integration.handler.support.MessagingMethodInvokerHelper.<init>(MessagingMethodInvokerHelper.java:255)
at org.springframework.integration.handler.support.MessagingMethodInvokerHelper.<init>(MessagingMethodInvokerHelper.java:206)
at org.springframework.integration.handler.support.MessagingMethodInvokerHelper.<init>(MessagingMethodInvokerHelper.java:210)
at org.springframework.integration.handler.MethodInvokingMessageProcessor.<init>(MethodInvokingMessageProcessor.java:50)
at org.springframework.integration.transformer.MethodInvokingTransformer.<init>(MethodInvokingTransformer.java:38)
at org.springframework.integration.config.annotation.TransformerAnnotationPostProcessor.createHandler(TransformerAnnotationPostProcessor.java:71)
at org.springframework.integration.config.annotation.AbstractMethodAnnotationPostProcessor.postProcess(AbstractMethodAnnotationPostProcessor.java:158)
at org.springframework.integration.config.annotation.MessagingAnnotationPostProcessor.postProcessMethodAndRegisterEndpointIfAny(MessagingAnnotationPostProcessor.java:230)
at org.springframework.integration.config.annotation.MessagingAnnotationPostProcessor.lambda$processAnnotationTypeOnMethod$1(MessagingAnnotationPostProcessor.java:220)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
at org.springframework.integration.config.annotation.MessagingAnnotationPostProcessor.afterSingletonsInstantiated(MessagingAnnotationPostProcessor.java:141)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:963)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:923)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:588)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:767)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:426)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:326)
at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:123)
at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:99)
at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:124)
... 67 more
Caused by: org.springframework.integration.handler.support.MessagingMethodInvokerHelper$IneligibleMethodException: Found more than one parameter type candidate: [java.lang.String] and [v3.b.engine.domain.kernel.DisclosureInfo]
at org.springframework.integration.handler.support.MessagingMethodInvokerHelper$HandlerMethod.setExclusiveTargetParameterType(MessagingMethodInvokerHelper.java:1334)
at org.springframework.integration.handler.support.MessagingMethodInvokerHelper$HandlerMethod.processMethodParameterForExpression(MessagingMethodInvokerHelper.java:1199)
at org.springframework.integration.handler.support.MessagingMethodInvokerHelper$HandlerMethod.generateExpression(MessagingMethodInvokerHelper.java:1152)
at org.springframework.integration.handler.support.MessagingMethodInvokerHelper$HandlerMethod.<init>(MessagingMethodInvokerHelper.java:1091)
at org.springframework.integration.handler.support.MessagingMethodInvokerHelper.createHandlerMethod(MessagingMethodInvokerHelper.java:391)

我错过了什么?

Answer 1

请让自己更熟悉Spring集成中的消息网关:https://docs.spring.io/spring-integration/docs/current/reference/html/messaging-endpoints.html#gateway.

简而言之:网关是一个接口，用于在其方法调用时发送消息。

Message是这样的:

public interface Message<T> {
/**
* Return the message payload.
*/
T getPayload();
/**
* Return message headers for the message (never {@code null} but may be empty).
*/
MessageHeaders getHeaders();
}

因为你没有一个Message类型作为你的参数之一，框架不知道他们中的哪一个映射到它将要创建的消息的有效负载。

请确定使用@Payload的有效载荷应该使用什么参数。哪一个将被添加到使用@Header注释的标题。所有这些信息都在我开头链接的文档中。