Hibernate:永远不会调用MyInterceptor#onFlushDirty

问题: 为什么永远不会调用MyInterceptor#onFlushDirty

我在xml配置中扩展AbstractEntityManagerFactoryBean

       

MyEntityManagerFactoryBean

 public class MyEntityManagerFactoryBean extends AbstractEntityManagerFactoryBean implements LoadTimeWeaverAware { private Interceptor entityInterceptor; public Interceptor getEntityInterceptor() { return entityInterceptor; } public void setEntityInterceptor(Interceptor interceptor) { entityInterceptor = interceptor; } } 

MyInterceptor:

 public class MyInterceptor extends EmptyInterceptor { public MyInterceptor() { System.out.println("init"); // Works well } // PROBLEM - is never called @Override public boolean onFlushDirty(Object entity, Serializable id, Object[] currentState, Object[] previousState, String[] propertyNames, Type[] types) { if (entity instanceof File) { ..... } return false; } } 

更新:[解释为什么自定义脏策略看起来不是我的方式]

我想在每次更改Folder实体EXCEPT folderPosition时更新modified时间戳。 同时, folderPosition应该是持久的而不是瞬态的(意味着导致实体变脏)。

由于我使用Spring Transactional和Hibernate模板,因此有一些细微差别:

1)我无法更新每个setter末尾的修改时间戳,如:

 public void setXXX(XXX xxx) { //PROBLEM: Hibernate templates collect object via setters, //means simple get query will cause multiple 'modified' timestamp updates this.xxx = xxx; this.modified = new Date(); } 

2)我不能手动调用setModified ,因为它有大约25个字段,并且每个字段的setXXX分散在整个应用程序中。 我没有权力进行重构。

 @Entity public class Folder { /** * GOAL: Changing of each of these fields except 'folderPosition' should cause * 'modified' timestamp update */ private long id; private String name; private Date created; private Date modified; private Integer folderLocation; @PreUpdate public void preUpdate() { //PROBLEM : change modified even if only location field has been changed! //PROBLEM: need to know which fields have been updated! modified = new Date(); } .... } 

您需要扩展findDirty方法而不是onFlushDirty 。 请参阅本教程以获取详细说明,并参考GitHub工作示例。