[英]Axon Event Handler not Working
我正在开发一个小的 cqrs 实现,我对它很陌生。 我想从聚合中分离每个处理程序(命令和事件),并确保一切正常。 命令处理程序从控制器触发,但事件处理程序没有触发。 任何人都可以请帮忙。
public class User extends AbstractAnnotatedAggregateRoot<String> {
/**
*
*/
private static final long serialVersionUID = 1L;
@AggregateIdentifier
private String userId;
private String userName;
private String age;
public User() {
}
public User(String userid) {
this.userId=userid;
}
@Override
public String getIdentifier() {
return this.userId;
}
public void createuserEvent(UserCommand command){
apply(new UserEvent(command.getUserId()));
}
@EventSourcingHandler
public void applyAccountCreation(UserEvent event) {
this.userId = event.getUserId();
}
}
public class UserCommand {
private final String userId;
public UserCommand(String userid) {
this.userId = userid;
}
public String getUserId() {
return userId;
}
}
@Component 公共类 UserCommandHandler {
@CommandHandler
public void userCreateCommand(UserCommand command) {
User user = new User(command.getUserId());
user.createuserEvent(command);
}
}
public class UserEvent {
private final String userId;
public UserEvent(String userid) {
this.userId = userid;
}
public String getUserId() {
return userId;
}
}
@Component 公共类 UserEventHandler {
@EventHandler
public void createUser(UserEvent userEvent) {
System.out.println("Event triggered");
}
}
@Configuration
@AnnotationDriven
public class AppConfiguration {
@Bean
public SimpleCommandBus commandBus() {
SimpleCommandBus simpleCommandBus = new SimpleCommandBus();
return simpleCommandBus;
}
@Bean
public Cluster normalCluster() {
SimpleCluster simpleCluster = new SimpleCluster("simpleCluster");
return simpleCluster;
}
@Bean
public ClusterSelector clusterSelector() {
Map<String, Cluster> clusterMap = new HashMap<>();
clusterMap.put("com.user.event.handler", normalCluster());
//clusterMap.put("exploringaxon.replay", replayCluster());
return new ClassNamePrefixClusterSelector(clusterMap);
}
@Bean
public EventBus clusteringEventBus() {
ClusteringEventBus clusteringEventBus = new ClusteringEventBus(clusterSelector(), terminal());
return clusteringEventBus;
}
@Bean
public EventBusTerminal terminal() {
return new EventBusTerminal() {
@Override
public void publish(EventMessage... events) {
normalCluster().publish(events);
}
@Override
public void onClusterCreated(Cluster cluster) {
}
};
}
@Bean
public DefaultCommandGateway commandGateway() {
return new DefaultCommandGateway(commandBus());
}
@Bean
public Repository<User> eventSourcingRepository() {
EventStore eventStore = new FileSystemEventStore(new SimpleEventFileResolver(new File("D://sevents.txt")));
EventSourcingRepository eventSourcingRepository = new EventSourcingRepository(User.class, eventStore);
eventSourcingRepository.setEventBus(clusteringEventBus());
AnnotationEventListenerAdapter.subscribe(new UserEventHandler(), clusteringEventBus());
return eventSourcingRepository;
}
}
据我所知,唯一缺少的是您没有将User
聚合添加到存储库。 通过将它添加到存储库,用户被持久化(通过存储生成的事件,在事件源的情况下,或者它的状态),并且命令处理程序(包括聚合)生成的所有事件都被发布到事件总线. 请注意,聚合的@EventSourcingHandler
会立即调用,但任何外部@EventHandler
仅在命令处理程序执行后才会调用。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.