• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
  • Campbell Ritchie
  • Ron McLeod
  • Rob Spoor
  • Tim Cooke
  • Junilu Lacar
  • Henry Wong
  • Liutauras Vilda
  • Jeanne Boyarsky
Saloon Keepers:
  • Jesse Silverman
  • Tim Holloway
  • Stephan van Hulst
  • Tim Moores
  • Carey Brown
  • Al Hobbs
  • Mikalai Zaikin
  • Piet Souris

tracking active users in web app using Servlet event Listeners and j_username

Ranch Hand
Posts: 58
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi all,

I'm writing an application where I want to track and display active users (users that are logged in).

My thought is to be able to do this by using the HttpSessionListener or any other of the Listener interfaces from the servlet API.

I've written a piece of code that counts number of users online using the HttpSessionListener interface.
This is fine for me, however I've got the problem in how to get the username from my j_username FORM authentication
(using Tomcat 4.x). My intention is to add each user to an array or map, but I want my implementation of the listeners to do the job. I just can't figure out how to get my listeners to get hold of the username

Many Thanks
Posts: 9
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
The only cross platform way to get the username of the currently authenticated user is to get it from the HttpServletRequest:

But, you can't get the request from the session. You could use a ServletRequestListener to get the request. Or instead of using a listener, you could use a filter...

- alan
What kind of corn soldier are you? And don't say "kernel" - that's only for this tiny ad:
Thread Boost feature
    Bookmark Topic Watch Topic
  • New Topic