Package org.apache.wiki.auth

Class SessionMonitor

java.lang.Object
org.apache.wiki.auth.SessionMonitor
All Implemented Interfaces:
java.util.EventListener, javax.servlet.http.HttpSessionListener
public class SessionMonitor
extends java.lang.Object
implements javax.servlet.http.HttpSessionListener

Manages Sessions for different Engines.

The Sessions are stored both in the remote user HttpSession and in the SessionMonitor for the Engine. This class must be configured as a session listener in the web.xml for the wiki web application.

  • Constructor Summary

    Constructors
    Constructor Description
    SessionMonitor()
    Construct the SessionListener

  • Method Summary

    Modifier and Type Method Description
    void addWikiEventListener​(WikiEventListener listener)
    Registers a WikiEventListener with this instance.
    Session find​(java.lang.String sessionId)
    Looks up the wiki session associated with a user's Http session and adds it to the session cache.
    Session find​(javax.servlet.http.HttpSession session)
    Looks up the wiki session associated with a user's Http session and adds it to the session cache.
    protected void fireEvent​(int type, java.security.Principal principal, Session session)
    Fires a WikiSecurityEvent to all registered listeners.
    static SessionMonitor getInstance​(Engine engine)
    Returns the instance of the SessionMonitor for this wiki.
    void remove​(javax.servlet.http.HttpServletRequest request)
    Removes the wiki session associated with the user's HttpRequest from the session cache.
    void remove​(javax.servlet.http.HttpSession session)
    Removes the wiki session associated with the user's HttpSession from the session cache.
    void removeWikiEventListener​(WikiEventListener listener)
    Un-registers a WikiEventListener with this instance.
    void sessionCreated​(javax.servlet.http.HttpSessionEvent se)
    Fires when the web container creates a new HTTP session.
    void sessionDestroyed​(javax.servlet.http.HttpSessionEvent se)
    Removes the user's WikiSession from the internal session cache when the web container destroys an HTTP session.
    int sessions()
    Returns the current number of active wiki sessions.
    java.security.Principal[] userPrincipals()
    Returns the current wiki users as a sorted array of Principal objects.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • SessionMonitor

      public SessionMonitor()
      Construct the SessionListener

  • Method Details

    • getInstance

      public static SessionMonitor getInstance​(Engine engine)
      Returns the instance of the SessionMonitor for this wiki. Only one SessionMonitor exists per Engine.
      Parameters:
      engine - the wiki engine
      Returns:
      the session monitor

    • find

      public final Session find​(javax.servlet.http.HttpSession session)

      Looks up the wiki session associated with a user's Http session and adds it to the session cache. This method will return the "guest session" as constructed by SessionSPI.guest(Engine) if the HttpSession is not currently associated with a WikiSession. This method is guaranteed to return a non-null WikiSession.

      Internally, the session is stored in a HashMap; keys are the HttpSession objects, while the values are WeakReference-wrapped WikiSessions.

      Parameters:
      session - the HTTP session
      Returns:
      the wiki session

    • find

      public final Session find​(java.lang.String sessionId)

      Looks up the wiki session associated with a user's Http session and adds it to the session cache. This method will return the "guest session" as constructed by SessionSPI.guest(Engine) if the HttpSession is not currently associated with a WikiSession. This method is guaranteed to return a non-null WikiSession.

      Internally, the session is stored in a HashMap; keys are the HttpSession objects, while the values are WeakReference-wrapped WikiSessions.

      Parameters:
      sessionId - the HTTP session
      Returns:
      the wiki session

    • remove

      public final void remove​(javax.servlet.http.HttpServletRequest request)
      Removes the wiki session associated with the user's HttpRequest from the session cache.
      Parameters:
      request - the user's HTTP request

    • remove

      public final void remove​(javax.servlet.http.HttpSession session)
      Removes the wiki session associated with the user's HttpSession from the session cache.
      Parameters:
      session - the user's HTTP session

    • sessions

      public final int sessions()
      Returns the current number of active wiki sessions.
      Returns:
      the number of sessions

    • userPrincipals

      public final java.security.Principal[] userPrincipals()

      Returns the current wiki users as a sorted array of Principal objects. The principals are those returned by each WikiSession's Session.getUserPrincipal()'s method.

      To obtain the list of current WikiSessions, we iterate through our session Map and obtain the list of values, which are WikiSessions wrapped in WeakReference objects. Those WeakReferences whose get() method returns non-null values are valid sessions.

      Returns:
      the array of user principals

    • addWikiEventListener

      public final void addWikiEventListener​(WikiEventListener listener)
      Registers a WikiEventListener with this instance.
      Parameters:
      listener - the event listener
      Since:
      2.4.75

    • removeWikiEventListener

      public final void removeWikiEventListener​(WikiEventListener listener)
      Un-registers a WikiEventListener with this instance.
      Parameters:
      listener - the event listener
      Since:
      2.4.75

    • fireEvent

      protected final void fireEvent​(int type, java.security.Principal principal, Session session)
      Fires a WikiSecurityEvent to all registered listeners.
      Parameters:
      type - the event type
      principal - the user principal associated with this session
      session - the wiki session
      Since:
      2.4.75

    • sessionCreated

      public void sessionCreated​(javax.servlet.http.HttpSessionEvent se)
      Fires when the web container creates a new HTTP session.
      Specified by:
      sessionCreated in interface javax.servlet.http.HttpSessionListener
      Parameters:
      se - the HTTP session event

    • sessionDestroyed

      public void sessionDestroyed​(javax.servlet.http.HttpSessionEvent se)
      Removes the user's WikiSession from the internal session cache when the web container destroys an HTTP session.
      Specified by:
      sessionDestroyed in interface javax.servlet.http.HttpSessionListener
      Parameters:
      se - the HTTP session event