Hibernate Interceptor and Event

最新推荐文章于 2025-07-28 23:27:29 发布

原创最新推荐文章于 2025-07-28 23:27:29 发布 · 254 阅读

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#interceptor #hibernate #session #methods #class #thread

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本文介绍了Hibernate中拦截器和事件系统的使用方式及区别。拦截器分为会话范围和会话工厂范围，前者在打开会话时指定，后者需在配置阶段设置，并应用于所有会话。事件系统则通过配置文件定义，可用于替代或补充拦截器的功能。

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Interceptor:

Interceptors come in two flavors: Session-scoped and SessionFactory-scoped.

A Session-scoped interceptor is specified when a session is opened using one of the overloaded SessionFactory.openSession() methods accepting an Interceptor:

Session session = sf.openSession( new AuditInterceptor() );

A SessionFactory-scoped interceptor is registered with the Configuration object prior to building the SessionFactory. In this case, the supplied interceptor will be applied to all sessions opened from that SessionFactory; this is true unless a session is opened explicitly specifying the interceptor to use. SessionFactory-scoped interceptors must be thread safe, taking care to not store session-specific state since multiple sessions will use this interceptor (potentially) concurrently.

new Configuration().setInterceptor( new AuditInterceptor() );

Event:

The event system can be used in addition or as a replacement for interceptors.

Event was defined in hibernate.cfg.xml, after interceptor created:

<hibernate-configuration> <session-factory> ... <event type="load"> <listener class="com.eg.MyLoadListener"/> <listener class="org.hibernate.event.def.DefaultLoadEventListener"/> </event> </session-factory> </hibernate-configuration>

But what's the really different between Interceptor and Event????