Package org.springframework.web.util
Class HttpSessionMutexListener
- java.lang.Object
- org.springframework.web.util.HttpSessionMutexListener
- All Implemented Interfaces:
EventListener
,HttpSessionListener
public class HttpSessionMutexListener extends Object implements HttpSessionListener
Servlet HttpSessionListener that automatically exposes the session mutex when an HttpSession gets created. To be registered as a listener inweb.xml
.The session mutex is guaranteed to be the same object during the entire lifetime of the session, available under the key defined by the
SESSION_MUTEX_ATTRIBUTE
constant. It serves as a safe reference to synchronize on for locking on the current session.In many cases, the HttpSession reference itself is a safe mutex as well, since it will always be the same object reference for the same active logical session. However, this is not guaranteed across different servlet containers; the only 100% safe way is a session mutex.
- Since:
- 1.2.7
- Author:
- Juergen Hoeller
- See Also:
WebUtils.SESSION_MUTEX_ATTRIBUTE
,WebUtils.getSessionMutex(javax.servlet.http.HttpSession)
,AbstractController.setSynchronizeOnSession(boolean)
Constructor Summary
Constructors Constructor Description HttpSessionMutexListener()
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
sessionCreated(HttpSessionEvent event)
void
sessionDestroyed(HttpSessionEvent event)
Constructor Detail
HttpSessionMutexListener
public HttpSessionMutexListener()
Method Detail
sessionCreated
public void sessionCreated(HttpSessionEvent event)
- Specified by:
sessionCreated
in interfaceHttpSessionListener
sessionDestroyed
public void sessionDestroyed(HttpSessionEvent event)
- Specified by:
sessionDestroyed
in interfaceHttpSessionListener