Events

事件：

• BeforeCreateEvent 創建之前
• AfterCreateEvent 創建之後
• BeforeSaveEvent 保存之前
• AfterSaveEvent 保存之後
• BeforeLinkSaveEvent 鏈接之前
• AfterLinkSaveEvent 鏈接之後
• BeforeDeleteEvent 刪除之前
• AfterDeleteEvent 刪除之後

應用程序級的Listener

public class BeforeSaveEventListener extends AbstractRepositoryEventListener {

  @Override
  public void onBeforeSave(Object entity) {
    ... logic to handle inspecting the entity before the Repository saves it
  }

  @Override
  public void onAfterDelete(Object entity) {
    ... send a message that this entity has been deleted
  }
}

註解處理器

定義針對Person實體的監控：

@RepositoryEventHandler 
public class PersonEventHandler {

  @HandleBeforeSave
  public void handlePersonSave(Person p) {
    // … you can now deal with Person in a type-safe way
  }

  @HandleBeforeSave
  public void handleProfileSave(Profile p) {
    // … you can now deal with Profile in a type-safe way
  }
}

注入到容器：

@Configuration
public class RepositoryConfiguration {

  @Bean
  PersonEventHandler personEventHandler() {
    return new PersonEventHandler();
  }
}