Update on yesterday’s post. Here’s a sample listener that implements the HttpSessionListener interface:<\/p>\n
****************************************************
\npackage com.mindseye;<\/p>\n
import javax.servlet.http.*;
\nimport javax.servlet.http.HttpSessionListener;<\/p>\n
\/**
\n * @author Aaron Johnson
\n * ajohnson@mindseye.com
\n *
\n * CFMXHttpSessionListener: An object that implements the HttpSessionListener
\n * interface, allowing CFMX developers to use session_OnStart and session_OnEnd
\n * events. This class can only retrieve the J2EE session ID when “Use J2EE
\n * session variables” is checked in CFIDE –> Administrator –> Memory
\n * Variables.
\n *\/<\/p>\n
public class CFMXHttpSessionListener implements HttpSessionListener {<\/p>\n
\tpublic void sessionCreated(HttpSessionEvent se) {<\/p>\n
\t\t\/\/ get the session just created
\n\t\tHttpSession newSession = se.getSession();<\/p>\n
\t\t\/\/ do something with the new session (ie: log to db, write to a file, email to a friend
\n\t\tSystem.err.println(“A new session was created: session = ” + newSession.toString());
\n\t\tSystem.err.println(“Creation:” + newSession.getCreationTime());<\/p>\n
\t}<\/p>\n
\tpublic void sessionDestroyed(HttpSessionEvent se) {<\/p>\n
\t\t\/\/ get the session just created
\n\t\tHttpSession newSession = se.getSession();<\/p>\n
\t\t\/* do stuff upon session end, (ie: delete items from this users shopping cart
\n\t\t if you’re persisting items to a db..)
\n\t\t*\/
\n\t\tSystem.err.println(“A session was destroyed: session = ” + newSession.toString());
\n\t\tSystem.err.println(“Creation:” + newSession.getCreationTime());<\/p>\n
\t}
\n}<\/p>\n
****************************************************
\nAnd then to get this class to run, you must add <\/p>\n
<listener>
\n <listener-class>
\n com.mindseye.CFMXHttpSessionListener
\n <\/listener-class>
\n<\/listener><\/p>\n
to CFMX\\wwwroot\\WEB-INF\\web.xml and you must copy the compiled class to the CFMX\\wwwroot\\WEB-INF\\classes\\com\\mindseye\\ folder. Additionally, it appears that (and this makes sense) the session we’re getting information about is the J2EE session ID, not the CFID & CFTOKEN. This means that you must have “Use J2EE session variables” checked in CFIDE –> Administrator –> Memory Variables. Restart CFMX and then you can see the results in cfusionmx\\runtime\\logs\\default-err.log<\/p>\n
This class would probably be way more useful if it actually did something… like log the start and end times, the id and maybe the servlet context to a database, but each developer will probably want to do something different, so I’ll leave that unfinished. I’m *not* seeing the session_OnEnd fired in my testing… anyone wanna take a guess?<\/p>\n
Here’s a sample application_OnStart for CFMX:<\/p>\n
****************************************************
\npackage com.mindseye;<\/p>\n
import javax.servlet.*;
\nimport javax.servlet.ServletContextListener;<\/p>\n
\/**
\n * @author Aaron Johnson
\n * ajohnson@mindseye.com
\n *
\n * CFMXServletContextListener: An object that implements the ServletContextListener
\n * interface, allowing CFMX developers to use application_OnStart and
\n * application_OnEnd events.
\n *\/
\npublic class CFMXServletContextListener implements ServletContextListener {<\/p>\n
\tpublic void contextDestroyed(ServletContextEvent sce) {<\/p>\n
\t\tServletContext sc = sce.getServletContext();<\/p>\n
\t\t\/\/ do something on destroy()
\n\t\tSystem.err.println(“The application ‘” + sc.getServletContextName() + “‘ was destroyed”);<\/p>\n
\t}<\/p>\n
\tpublic void contextInitialized(ServletContextEvent sce) {<\/p>\n
\t\tServletContext sc = sce.getServletContext();<\/p>\n
\t\t\/\/ do something on destroy()
\n\t\tSystem.err.println(“The application ‘” + sc.getServletContextName() + “‘ was started”);
\n\t}
\n}
\n****************************************************<\/p>\n
Again, same thing, you must copy the compiled class files to cfusion\\wwwroot\\WEB-INF\\classes\\com\\mindseye\\, add a <listener> element to web.xml and restart CFMX. You’ll see the results in cfusion\\runtime\\logs\\default-err.log.<\/p>\n
I’d love to hear from Macromedia (or any other Java geeks) as to why I don’t get an results from sessionDestroyed().<\/p>\n","protected":false},"excerpt":{"rendered":"
Update on yesterday’s post. Here’s a sample listener that implements the HttpSessionListener interface: **************************************************** package com.mindseye; import javax.servlet.http.*; import javax.servlet.http.HttpSessionListener; \/** * @author Aaron Johnson * ajohnson@mindseye.com * * CFMXHttpSessionListener: An object that implements the HttpSessionListener * interface, allowing CFMX developers to use session_OnStart and session_OnEnd * events. This class can only retrieve the J2EE … Continue reading More on ColdFusion & HttpSessionListener interface<\/span>