Servlet 2.3+ HttpSessionListener that automatically exposes the
session mutex when an HttpSession gets created.
To be registered as a listener in web.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.
author: Juergen Hoeller since: 1.2.7 See Also: WebUtils.SESSION_MUTEX_ATTRIBUTE See Also: WebUtils.getSessionMutex(javax.servlet.http.HttpSession) See Also: org.springframework.web.servlet.mvc.AbstractController.setSynchronizeOnSession |