主体不能分配给类/artemis spring boot

Question

我没有找到我的问题的答案，所以我在这里问它

resp.setJMSType("com.nesdl.flyaway.core.modelmessages.ApplicationsEvent");
log.debug(resp.getJMSType() + " / " + resp.getBody(String.class));
ApplicationsEvent response = resp.getBody(ApplicationsEvent.class);

2021-06-02 09:39:40.060 DEBUG 14288 --- [p-nio-80-exec-1] c.n.f.f.s.ApplicationsServicesImpl       : com.nesdl.flyaway.core.modelmessages.ApplicationsEvent / is null : "{\"applicationsDto\":[{\"id\":1,\"version\":0,\"dateCreated\":\"2021-05-18T17:52:30+0000\",\"dateLastModified\":\"2021-05-18T17:52:30+0000\",\"uuid\":\"66ef5e19-e5ac-48d1-86c8-85d26e0fa205\",\"valid\":true,\"modified\":false,\"toHistorize\":false,\"name\":\"TestApp\",\"description\":\"Première application\"}]}"
2021-06-02 09:39:40.066 DEBUG 14288 --- [p-nio-80-exec-1] o.s.web.servlet.DispatcherServlet        : Failed to complete request: javax.jms.MessageFormatException: Body not assignable to class com.nesdl.flyaway.core.modelmessages.ApplicationsEvent
2021-06-02 09:39:40.071 ERROR 14288 --- [p-nio-80-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 javax.jms.MessageFormatException: Body not assignable to class com.nesdl.flyaway.core.modelmessages.ApplicationsEvent] with root cause

javax.jms.MessageFormatException: Body not assignable to class com.nesdl.flyaway.core.modelmessages.ApplicationsEvent
    at org.apache.activemq.artemis.jms.client.ActiveMQMessage.getBody(ActiveMQMessage.java:740) ~[artemis-jms-client-2.15.0.jar:2.15.0]
    at com.nesdl.flyaway.front.services.ApplicationsServicesImpl.getApplications(ApplicationsServicesImpl.java:52) ~[classes/:na]
    at com.nesdl.flyaway.front.services.ApplicationsServicesImpl$$FastClassBySpringCGLIB$$293cab08.invoke(<generated>) ~[classes/:na]
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) ~[spring-core-5.3.6.jar:5.3.6]
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:779) ~[spring-aop-5.3.6.jar:5.3.6]

    @Override
    public List<ApplicationDto> getApplications() throws IOException, JMSException {
        ApplicationsEvent mess = ApplicationsEvent.builder()
                .applicationsDto(new ArrayList<>())
                .build();
        log.debug("message sent :"+mess.toString());
        Message resp = jmsTemplate.sendAndReceive(JmsSystemConfig.APPLICATIONS_QUEUE, new MessageCreator() {
            @SneakyThrows
            @Override
            public Message createMessage(Session session) throws JMSException {
                Message appMess = session.createTextMessage(objectMapper.writeValueAsString(mess));
                appMess.setStringProperty("_type","com.nesdl.flyaway.core.modelmessages.ApplicationsEvent");
                return appMess;
            }
        });
        resp.setJMSType("com.nesdl.flyaway.core.modelmessages.ApplicationsEvent");
        log.debug(resp.getJMSType() + " / " + resp.getBody(String.class));
        ApplicationsEvent response = resp.getBody(ApplicationsEvent.class);
        log.debug(response.getApplicationsDto().toString());
        return response.getApplicationsDto();
    }

    @JmsListener(destination = JmsSystemConfig.APPLICATIONS_QUEUE)
    public void replyApplications(@Payload ApplicationsEvent appsEvent, @Headers MessageHeaders headers, Message message) throws JMSException, JsonProcessingException {
        ApplicationsEvent resp = ApplicationsEvent.builder()
                .applicationsDto(as.getApplications())
                .build();
        jmsTemplate.convertAndSend(message.getJMSReplyTo(),objectMapper.writeValueAsString(resp));
        log.debug("reply ok "+resp.toString()+" / "+objectMapper.writeValueAsString(resp));
    }

@Configuration
public class JmsConfig {

    @Bean
    public MessageConverter jacksonJmsMessageConverter(ObjectMapper objectMapper) {
        MappingJackson2MessageConverter converter = new MappingJackson2MessageConverter();
        converter.setTargetType(MessageType.TEXT);
        converter.setTypeIdPropertyName("_type");
        converter.setObjectMapper(objectMapper);
        return converter;
    }

}

Answer 1

它表示您正在尝试将JMS消息体分配或添加到“事件类”中。事件通常有一个命名的重写方法，用于在事件被触发时将代码放置在其中以运行该代码。

这里可能是这样的，编译器错误消息似乎表明“resp”，一个消息体和“response”applicationsevent。

resp.setJMSType("com.nesdl.flyaway.core.modelmessages.ApplicationsEvent");
        log.debug(resp.getJMSType() + " / " + resp.getBody(String.class));
        ApplicationsEvent response = resp.getBody(ApplicationsEvent.class);
        log.debug(response.getApplicationsDto().toString());