13、Java Persistence with EntityManager: A Comprehensive Guide

最新推荐文章于 2025-07-19 11:43:43 发布

lambda

最新推荐文章于 2025-07-19 11:43:43 发布

阅读量71

点赞数

CC 4.0 BY-SA版权

分类专栏：探秘EJB 3.1：企业级Java开发的艺术文章标签： Java Persistence EntityManager JPA

本文链接：https://blog.youkuaiyun.com/lambda/article/details/150475807

探秘EJB 3.1：企业级Java开发的艺术专栏收录该内容

49 篇文章 ¥499.90

订阅专栏¥69.90

会员秒杀 ¥9.9 重磅福利

超级会员免费看

Java Persistence with EntityManager: A Comprehensive Guide

1. Extended Persistence Context in Stateful Session Beans

In the context of stateful session beans, an extended persistence context can be used by applying the @javax.persistence.PersistenceContext annotation with a type of EXTENDED . Here is an example:

@Stateful
public class MyBean implements MyBusinessInterface
{
   @PersistenceContext (unitName="nameOfMyPu", type=PersistenceContextType.EXTENDED)
   private EntityManager manager;
}

When the MyBean instance is created, a persistence context is also created for the injected manager field. The lifespan of this persistence context is the s