org.springframework.web.jsf

Class FacesContextUtils

  • java.lang.Object
    • org.springframework.web.jsf.FacesContextUtils


  • public abstract class FacesContextUtils
    extends java.lang.Object
    Convenience methods to retrieve Spring's root WebApplicationContext for a given JSF FacesContext. This is useful for accessing a Spring application context from custom JSF-based code.

    Analogous to Spring's WebApplicationContextUtils for the ServletContext.

    Since:
    1.1
    Author:
    Juergen Hoeller
    See Also:
    ContextLoader, WebApplicationContextUtils
    • Constructor Detail

      • FacesContextUtils

        public FacesContextUtils()
    • Method Detail

      • getRequiredWebApplicationContext

        public static WebApplicationContext getRequiredWebApplicationContext(FacesContext fc)
                                                                      throws java.lang.IllegalStateException
        Find the root WebApplicationContext for this web app, typically loaded via ContextLoaderListener.

        Will rethrow an exception that happened on root context startup, to differentiate between a failed context startup and no context at all.

        Parameters:
        fc - the FacesContext to find the web application context for
        Returns:
        the root WebApplicationContext for this web app
        Throws:
        java.lang.IllegalStateException - if the root WebApplicationContext could not be found
        See Also:
        WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE
      • getSessionMutex

        @Nullable
        public static java.lang.Object getSessionMutex(FacesContext fc)
        Return the best available mutex for the given session: that is, an object to synchronize on for the given session.

        Returns the session mutex attribute if available; usually, this means that the HttpSessionMutexListener needs to be defined in web.xml. Falls back to the Session reference itself if no mutex attribute found.

        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 Session 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.

        Parameters:
        fc - the FacesContext to find the session mutex for
        Returns:
        the mutex object (never null)
        See Also:
        WebUtils.SESSION_MUTEX_ATTRIBUTE, HttpSessionMutexListener