java 当前没有会话绑定到执行上下文
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No session currently bound to execution context
提问by Srinivas
I got below exception when I used session.getCurrentSession().
当我使用session.getCurrentSession().
I have mentioned
我已经提到
hibernate.current_session_context_class: managed
org.hibernate.HibernateException: No session currently bound to execution context
at org.hibernate.context.internal.ManagedSessionContext.currentSession(ManagedSessionContext.java:75)
at org.hibernate.internal.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:1014)
at io.dropwizard.hibernate.AbstractDAO.currentSession(AbstractDAO.java:36)
at io.dropwizard.hibernate.AbstractDAO.persist(AbstractDAO.java:149)
I use this with dropwizard. Can anyone help me to solve this?
我将它与dropwizard. 谁能帮我解决这个问题？
回答by yunspace
If you are using Dropwizard Hibernate. You need to add @UnitOfWorkannotation to your Resource method. More info within dropwizard manual, hibernate chapter.
如果您使用的是 Dropwizard Hibernate。您需要为@UnitOfWorkResource 方法添加注释。dropwizard 手册中的更多信息，休眠章节。
回答by Arpit Aggarwal
Can you try with : session.openSession()- It tell hibernate to always opens a new session and you have to close once you are done with the operations. With session.getCurrentSession(), hibernate returns a session bound to a context that you don't need to close and only need to set the hibernate.current_session_context_class to thread.
您可以尝试：session.openSession()- 它告诉 hibernate 始终打开一个新会话，并且在完成操作后必须关闭。使用session.getCurrentSession()，hibernate 返回绑定到上下文的会话，您不需要关闭该上下文，只需将 hibernate.current_session_context_class 设置为线程。
You can also configure session with SpringSessionContext, if your application is Spring based.
SpringSessionContext如果您的应用程序是基于 Spring 的，您还可以使用 配置会话。
Edit your hibernate-cfg.xmlwith below line:
hibernate-cfg.xml使用以下行编辑您的：
hibernate.current_session_context_class=org.springframework.orm.hibernate3.SpringSessionContext
What above line will do?
上面的线会做什么？
Making session context class as "org.springframework.orm.hibernate3.SpringSessionContext
", Hibernate will assume it is executing inside of a Spring transactional context (i.e. through a Spring transactional aspect) and Spring will now manage your transaction for you. However if you call getCurrentSession()outside of such a context, Hibernate will throw an exception complaining that no Session is bound to the thread.
将会话上下文类设为“org.springframework.orm.hibernate3.SpringSessionContext”，Hibernate 将假定它在 Spring 事务上下文内执行（即通过 Spring 事务方面），Spring 现在将为您管理您的事务。然而，如果你getCurrentSession()在这样的上下文之外调用，Hibernate 将抛出一个异常，抱怨没有 Session 绑定到线程。
