我正在Spring Boot + Axon Framework开发示例中进行解释,https://www.youtube.com/watch?v=Jp-rW-XOYzA&list=PLgGXSWYM2FpOa_FTla-x5Wd10dpmgrRC4&index=54。在此示例中,我仅使用最新的依赖项,而其他内容则保持不变。
当我简单地运行代码时,出现以下错误,并且在此行中已经出现了问题。请引导我。
错误:-
java.lang.Error: Unresolved compilation problem:
Exception Exception is not compatible with throws clause in SpringAMQPMessageSource.onMessage(Message, Channel)
at com.example.DemoComplaintsStatsApplication$1.onMessage(DemoComplaintsStatsApplication.java:54) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_151]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_151]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_151]
at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_151]
at org.springframework.messaging.handler.invocation.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:181) ~[spring-messaging-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.messaging.handler.invocation.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:114) ~[spring-messaging-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.amqp.rabbit.listener.adapter.HandlerAdapter.invoke(HandlerAdapter.java:51) ~[spring-rabbit-2.0.8.RELEASE.jar:2.0.8.RELEASE]
at org.springframework.amqp.rabbit.listener.adapter.MessagingMessageListenerAdapter.invokeHandler(MessagingMessageListenerAdapter.java:188) ~[spring-rabbit-2.0.8.RELEASE.jar:2.0.8.RELEASE]
at org.springframework.amqp.rabbit.listener.adapter.MessagingMessageListenerAdapter.onMessage(MessagingMessageListenerAdapter.java:126) ~[spring-rabbit-2.0.8.RELEASE.jar:2.0.8.RELEASE]
at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:1414) ~[spring-rabbit-2.0.8.RELEASE.jar:2.0.8.RELEASE]
at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.actualInvokeListener(AbstractMessageListenerContainer.java:1337) ~[spring-rabbit-2.0.8.RELEASE.jar:2.0.8.RELEASE]
at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:1324) ~[spring-rabbit-2.0.8.RELEASE.jar:2.0.8.RELEASE]
at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.executeListener(AbstractMessageListenerContainer.java:1303) ~[spring-rabbit-2.0.8.RELEASE.jar:2.0.8.RELEASE]
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.doReceiveAndExecute(SimpleMessageListenerContainer.java:817) ~[spring-rabbit-2.0.8.RELEASE.jar:2.0.8.RELEASE]
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.receiveAndExecute(SimpleMessageListenerContainer.java:801) ~[spring-rabbit-2.0.8.RELEASE.jar:2.0.8.RELEASE]
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$700(SimpleMessageListenerContainer.java:77) ~[spring-rabbit-2.0.8.RELEASE.jar:2.0.8.RELEASE]
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:1042) ~[spring-rabbit-2.0.8.RELEASE.jar:2.0.8.RELEASE]
at java.lang.Thread.run(Unknown Source) [na:1.8.0_151]
DemoComplaintsStatsApplication.java
@SpringBootApplication
public class DemoComplaintsStatsApplication {
public static void main(String[] args) {
SpringApplication.run(DemoComplaintsStatsApplication.class, args);
}
@ProcessingGroup("amqpEvents")
@RestController
public static class ComplaintStatisticsAPI {
private ConcurrentMap<String, AtomicLong> staticstics = new ConcurrentHashMap<>();
@EventHandler
public void on(ComplaintFileEvent event) {
staticstics.computeIfAbsent(event.getCompany(), k -> new AtomicLong()).incrementAndGet();
}
@GetMapping
public Map<String, AtomicLong> getStatistics(){
return staticstics;
}
}
@Bean
public SpringAMQPMessageSource complaintEvents(Serializer serializer) {
return new SpringAMQPMessageSource(new DefaultAMQPMessageConverter(serializer)) {
@RabbitListener(queues = "ComplaintEvents")
@Override
public void onMessage(Message message, Channel channel) throws Exception {
super.onMessage(message, channel);
}
};
}
}
答案 0 :(得分:1)
SpringAMQPMessageSource#onMessage(Message, Channel)
函数曾经是SpringAMQPMessageSource#onMessage(Message, Channel) throws Exception
。但是从3.4版开始,情况就不再如此。
我看到您也在Axon Framework上发布了另一个StackOverflow,您是否已升级到3.4版,对吗? 我想指出3.4 不是该框架的最新版本,因为它是4.0。 4.0还包括对Axon Server的非常简单的介绍,https://imgur.com/a/DPd8eoD是一种免费的替代品,可用于存储应用程序之间的事件和发布消息(例如命令,事件和查询)。很快,它完全不需要'Spring AMQP'软件包,应该会大大简化您的代码。
不过,要解决您的问题,请删除覆盖的throws Exception
函数上的onMessage(Message, Channel)
应该可以解决问题。