On Tue, 4 Feb 2003, Daniel Rall wrote:
> Quinton, I'm curious about your thoughts on how the Servlet API's
> HttpSessionActivationListener [1] ties in with TurbineSessionService.
> SessionListener implements only HttpSessionListener, the callback for
> session creation and deletion events. When active sessions which have been
> serialized to disk during servlet container shutdown are loaded during a
> server restart, it seems unlikely that they will again show up in Turbine's
> list of active sessions. I'm currently working with a version of
> TurbineSessionService in SourceCast (I dumped our custom code which did the
> same thing so that we could share the maintainence costs). Any ideas in
> regard to the HttpSessionActivationListener issue?
>
> - Dan
>
>
> [1]
>http://java.sun.com/products/servlet/2.3/javadoc/javax/servlet/http/HttpSessionActivationListener.html
Quinton, what do you think about SessionListener auto-adding itself as a
HttpSessionActivationListener to each newly created session?
Index: SessionListener.java
===================================================================
RCS file:
/home/cvs/jakarta-turbine-2/src/java/org/apache/turbine/services/session/SessionListener.java,v
retrieving revision 1.3
diff -u -r1.3 SessionListener.java
--- SessionListener.java 4 Feb 2003 17:01:45 -0000 1.3
+++ SessionListener.java 4 Feb 2003 21:42:17 -0000
@@ -58,9 +58,10 @@
import javax.servlet.http.HttpSessionListener;
/**
- * This class is a listener for Session creation and destruction. It
- * must be configured via your web application's <code>web.xml</code>
- * deployment descriptor as follows for the container to call it:
+ * This class is a listener for both session creation and destruction,
+ * and for session activation and passivation. It must be configured
+ * via your web application's <code>web.xml</code> deployment
+ * descriptor as follows for the container to call it:
*
* <blockquote><code><pre>
* <listener>
@@ -74,31 +75,64 @@
* <code><context-param></code> and <code><servlet></code>
* elements in your deployment descriptor.
*
+ * The {@link #sessionCreated(HttpSessionEvent)} callback will
+ * automatically add an instance of this listener to any newly created
+ * <code>HttpSession</code> for detection of session passivation and
+ * re-activation.
+ *
* @since 2.3
* @version $Id: SessionListener.java,v 1.3 2003/02/04 17:01:45 quintonm Exp $
* @author <a href="mailto:[EMAIL PROTECTED]";>Quinton McCombs</a>
+ * @author <a href="mailto:[EMAIL PROTECTED]";>Daniel Rall</a>
* @see javax.servlet.http.HttpSessionListener
*/
public class SessionListener
- implements HttpSessionListener
+ implements HttpSessionListener, HttpSessionActivationListener
{
+ // ---- HttpSessionListener implementation -----------------------------
+
/**
* Called by the servlet container when a new session is created
*
- * @param event
+ * @param event Session creation event.
*/
public void sessionCreated(HttpSessionEvent event)
{
- TurbineSession.addSession(event.getSession());
+ TurbineSessionService.getInstance().addSession(event.getSession());
+ event.getSession().setAttribute(getClass().getName(), this);
}
/**
* Called by the servlet container when a session is destroyed
*
- * @param event
+ * @param event Session destruction event.
*/
public void sessionDestroyed(HttpSessionEvent event)
{
- TurbineSession.removeSession(event.getSession());
+ event.getSession().removeAttribute(getClass().getName());
+ TurbineSessionService.getInstance().removeSession(event.getSession());
+ }
+
+
+ // ---- HttpSessionActivationListener implementation -------------------
+
+ /**
+ * Called by the servlet container when a new session is created
+ *
+ * @param event Session activation event.
+ */
+ public void sessionDidActivate(HttpSessionEvent event)
+ {
+ TurbineSessionService.getInstance().addSession(event.getSession());
+ }
+
+ /**
+ * Called by the servlet container when a session is destroyed
+ *
+ * @param event Session passivation event.
+ */
+ public void sessionWillPassivate(HttpSessionEvent event)
+ {
+ TurbineSessionService.getInstance().removeSession(event.getSession());
}
}
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