Spring Data的Domain Event的用法详解

@Entity
@Data
@AllArgsConstructor
@NoArgsConstructor
@ToString(exclude = "domainEvents")
public class Person {
 @Id
 @GeneratedValue
 private Long id;
 private String name;
 private Integer gender;//1:male;2:female

 @DomainEvents
 Collection<Object> domainEvents() {
  List<Object> events= new ArrayList<Object>();
  events.add(new PersonSavedEvent(this.id,this.gender));
  return events;
 }

 @AfterDomainEventPublication
 void callbackMethod() {
  //
 }
}

@Entity
@Data
@AllArgsConstructor
@NoArgsConstructor
@ToString(exclude = "domainEvents")
public class Person extends AbstractAggregateRoot{
 @Id
 @GeneratedValue
 private Long id;
 private String name;
 private Integer gender;//1:male;2:female

 public Person afterPersonSavedCompleted(){
  registerEvent(new PersonSavedEvent(this.id,this.gender));
  return this;
 }
}

@Component
public class GenderStatProcessor {
 @Autowired
 GenderRepository genderRepository;

 @Async
 @TransactionalEventListener
 public void handleAfterPersonSavedComplete(PersonSavedEvent event){

  GenderStat genderStat = genderRepository.findOne(1l);
  if(event.getGender()==1){
   genderStat.setMaleCount(genderStat.getMaleCount()+1);
  }else {
   genderStat.setFemaleCount(genderStat.getFemaleCount()+1);
  }
  genderRepository.save(genderStat);
 }
}