Axon Framework：如何使用状态存储的聚合

时间：2019-11-15 09:07:31

标签： java spring-boot axon

我在Axon 4.2上使用Spring Boot。 我尝试使用状态存储的聚合，尝试了两种方法，但没有一种有效。

1。，我完全按照您在此处所做的尝试：https://docs.axoniq.io/reference-guide/implementing-domain-logic/command-handling/state-stored-aggregates

我的代码：

@Getter
@Setter
@NoArgsConstructor
@Entity
@Table(name = "szervezet")
public class Organization {

  @Id
  @Column(columnDefinition = "serial", name = "szervezet_azon")
  @GeneratedValue(strategy = GenerationType.IDENTITY)
  private Long id;

   @AggregateIdentifier
   @Column(name = "aggregate_azon")
   private String aggregateId;

  @NotEmpty
  @Column(name = "szervezet_nev")
  private String organizationName;

   @CommandHandler
   public Organization(CreateOrganizationCommand command){
   System.err.println("CommandHandler");
   AggregateLifecycle.apply(new OrganizationCreatedEvent(command));
   }

   @EventHandler
   protected void on(OrganizationCreatedEvent event){
   this.id=event.getId();
   this.aggregateId=event.getAggregateId();
   this.organizationName=event.getOrganizationName();
   System.err.println("Eventhandler");
   }

}

我尝试运行它后，得到以下异常列表：

org.axonframework.commandhandling.NoHandlerForCommandException: No handler was subscribed to command [hu.enak.recordrequestingcaseservice.command.CreateOrganizationCommand]
    at org.axonframework.commandhandling.SimpleCommandBus.doDispatch(SimpleCommandBus.java:146) ~[axon-messaging-4.2.jar:4.2]
    at org.axonframework.commandhandling.SimpleCommandBus.dispatch(SimpleCommandBus.java:111) ~[axon-messaging-4.2.jar:4.2]
    at org.axonframework.commandhandling.gateway.AbstractCommandGateway.send(AbstractCommandGateway.java:75) ~[axon-messaging-4.2.jar:4.2]
    at org.axonframework.commandhandling.gateway.DefaultCommandGateway.send(DefaultCommandGateway.java:73) ~[axon-messaging-4.2.jar:4.2]
    at org.axonframework.commandhandling.gateway.DefaultCommandGateway.sendAndWait(DefaultCommandGateway.java:90) ~[axon-messaging-4.2.jar:4.2]
    at hu.enak.recordrequestingcaseservice.gateway.service.impl.OrganizationGatewayServiceImpl.createOrganization(OrganizationGatewayServiceImpl.java:17) ~[classes/:na]
    at hu.enak.recordrequestingcaseservice.controller.query.CaseQueryController.axon(CaseQueryController.java:124) ~[classes/:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
    at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
    at org.apache.cxf.service.invoker.AbstractInvoker.performInvocation(AbstractInvoker.java:179) ~[cxf-core-3.3.3.jar:3.3.3]
    at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:96) ~[cxf-core-3.3.3.jar:3.3.3]
    at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:201) ~[cxf-rt-frontend-jaxrs-3.3.3.jar:3.3.3]
    at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:104) ~[cxf-rt-frontend-jaxrs-3.3.3.jar:3.3.3]
    at org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:59) ~[cxf-core-3.3.3.jar:3.3.3]
    at org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:96) ~[cxf-core-3.3.3.jar:3.3.3]
    at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:308) ~[cxf-core-3.3.3.jar:3.3.3]
    at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:121) ~[cxf-core-3.3.3.jar:3.3.3]
    at org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:267) ~[cxf-rt-transports-http-3.3.3.jar:3.3.3]
    at org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:234) ~[cxf-rt-transports-http-3.3.3.jar:3.3.3]
    at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:208) ~[cxf-rt-transports-http-3.3.3.jar:3.3.3]
    at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:160) ~[cxf-rt-transports-http-3.3.3.jar:3.3.3]
    at org.apache.cxf.transport.servlet.CXFNonSpringServlet.invoke(CXFNonSpringServlet.java:216) ~[cxf-rt-transports-http-3.3.3.jar:3.3.3]
    at org.apache.cxf.transport.servlet.AbstractHTTPServlet.handleRequest(AbstractHTTPServlet.java:301) ~[cxf-rt-transports-http-3.3.3.jar:3.3.3]
    at org.apache.cxf.transport.servlet.AbstractHTTPServlet.doGet(AbstractHTTPServlet.java:225) ~[cxf-rt-transports-http-3.3.3.jar:3.3.3]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.apache.cxf.transport.servlet.AbstractHTTPServlet.service(AbstractHTTPServlet.java:276) ~[cxf-rt-transports-http-3.3.3.jar:3.3.3]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.21.jar:9.0.21]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.springframework.web.filter.CorsFilter.doFilterInternal(CorsFilter.java:96) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) ~[spring-web-5.1.8.RELEASE.jar:5.1.8.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:853) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1587) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.21.jar:9.0.21]
    at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]

我不知道为什么，因为有@CommandHandler。我认为是因为缺少@Aggregate批注，但是当我尝试使用它时，这是第二个选项，我得到以下编译器错误：

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2019-11-15 10:04:15.199 ERROR 6416 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

***************************
APPLICATION FAILED TO START
***************************

Description:

The bean 'organizationRepository', defined in null, could not be registered. A bean with that name has already been defined in null and overriding is disabled.

Action:

Consider renaming one of the beans or enabling overriding by setting spring.main.allow-bean-definition-overriding=true

我在做什么错？ 谢谢

1 个答案:

答案 0 :(得分：3)

如果您希望将类用作Axon聚合，则需要使用@Aggregate对其进行注释。在您的代码中，没有这样的注释，从而导致Axon不能将该类用作命令处理程序。

Axon还将为您的集合创建一个存储库，称为存储库。从日志看来，您已经有一个以这种方式命名的存储库。他们会发生冲突。重命名另一个存储库Bean或重命名Aggregate（您可以在@Aggregate批注中进行）可能是最好的选择。

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