具有分布式查询模型的Axon寄存器跟踪处理器

Question

我使用axon和Spring-Boot实现了CQRS+ES应用程序。我使用单独的查询模型和命令模型应用程序。我使用rabbitmq从命令模式发布事件。它工作正确。但是跟踪处理器实现在我的应用程序中不工作。

@SpringBootApplication
public class SeatQueryPart1Application {
    public static void main(String[] args) {
        SpringApplication.run(SeatQueryPart1Application.class, args);
    }

    @Bean
    public SpringAMQPMessageSource statisticsQueue(Serializer serializer) {
        return new SpringAMQPMessageSource(new DefaultAMQPMessageConverter(serializer)) {
            @RabbitListener(exclusive = false, bindings = @QueueBinding(value = @Queue, exchange = @Exchange(value = "ExchangeTypesTests.FanoutExchange", type = ExchangeTypes.FANOUT), key = "orderRoutingKey"))
            @Override
            public void onMessage(Message arg0, Channel arg1) throws Exception {
                super.onMessage(arg0, arg1);
            }
        };
    }

    @Autowired
    public void conf(EventHandlingConfiguration configuration) {
        configuration.registerTrackingProcessor("statistics");
    }

}

@ProcessingGroup("statistics")
@Component
public class EventLoggingHandler {


    private SeatReservationRepository seatReservationRepo;
    public EventLoggingHandler(final SeatReservationRepository e) {
        this.seatReservationRepo = e;
    }

    @EventHandler
    protected void on(SeatResurvationCreateEvent event) {
        Timestamp timestamp = new Timestamp(System.currentTimeMillis());
        Seat seat=new Seat(event.getId(), event.getSeatId(), event.getDate(),timestamp ,true);
        seatReservationRepo.save(seat);
    }

}

这是yml配置

axon:
  eventhandling:
    processors:
      statistics.source: statisticsQueue

我怎么才能做正确。（有人能推荐教程或代码示例吗）

Answer 1

SpringAMQPMessageSource是一个SubscribableMessageSource。这意味着您不能使用跟踪事件处理器来处理消息。它只与可订阅的事件处理器兼容。

删除configuration.RegisterTrackingProcessor（“statistics”）；并将其保留为默认值（subscribing）应该可以做到这一点。