我是休眠的新手。我想知道是否有任何crud操作發生,所以我決定使用jpa回調註釋。問題是當我運行項目並使用UI組件執行刪除&添加操作時,不會調用任何這些@PrePersist @PostPersist @PreRemove @PostRemove。我使用primefaces數據表刪除ManagedBean - > MessageService - > MessageDAO的操作。如果我只執行主文件來測試它完美JPA回調不被稱爲
MessageDAO:
@Component
public class MessageDAO {
@PersistenceContext
private EntityManager em;
@Transactional
public void register(Message message) {
em.persist(message);
}
@Transactional
public void delete(Integer id) {
Message m = em.find(Message.class, id);
em.remove(em.merge(m));
}
}
消息監聽
public class MessageListener {
@PrePersist
public void prePersist(Message o) {
System.out.println("Pre-Persistiting operation: ");
}
@PostPersist
public void postPersist(Message o) {
System.out.println("Post-Persist operation: ");
}
@PreRemove
public void preRemove(Message o) {
System.out.println("Pre-Removing operation: ");
}
@PostRemove
public void postRemove(Message o) {
System.out.println("Post-Remove operation: ");
}
@PreUpdate
public void preUpdate(Message o) {
System.out.println("Pre-Updating operation: ");
}
@PostUpdate
public void postUpdate(Message o) {
System.out.println("Post-Update operation: ");
}
}
消息
@EntityListeners(MessageListener.class)
@Entity
@Table(name = "messages")
public class Message implements Serializable {
private Integer messageId;
private String subject;
private String content;
public Message(){}
public Message(Integer messageId, String subject, String content) {
this.messageId = messageId;
this.subject = subject;
this.content = content;
}
@Id
@GeneratedValue
@Column(name = "MESSAGE_ID")
public Integer getMessageId() {
return messageId;
}
//getter setter
@PrePersist
public void prePersist() {
System.out.println("OLDUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU!!!!!!!!!!!!");
}
}
是否在'delete'方法查詢執行? –
是的,它從數據庫刪除記錄 –
檢查[this](https://stackoverflow.com/a/28341046/3094731)是否有幫助。 –