This week's giveaway is in the Android forum.
We're giving away four copies of Android Security Essentials Live Lessons and have Godfrey Nolan on-line!
See this thread for details.
The moose likes Servlets and the fly likes Some errors with my ActiveSessions counter Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login


Win a copy of Android Security Essentials Live Lessons this week in the Android forum!
JavaRanch » Java Forums » Java » Servlets
Bookmark "Some errors with my ActiveSessions counter" Watch "Some errors with my ActiveSessions counter" New topic
Author

Some errors with my ActiveSessions counter

Jenkin Zheng
Greenhorn

Joined: Mar 31, 2011
Posts: 12

Hi, everyone! I want to count active sessions on server. So I implement javax.servlet.http.HttpSessionListener, Here is a part code of SessionCounter
Here is my test the counter code:
Sometimes, the result is not right, like:[null]active sessions on server.
Why does it show null?I'm a newer!
thanks, everyone!
Piyush Joshi
Ranch Hand

Joined: Jun 10, 2011
Posts: 207

may be because you are printing it too early..
print it after the if/else block after you set the attribute in your code..


Piyush
syed aq
Greenhorn

Joined: Jul 16, 2011
Posts: 3
Donot use listener, in rare cases listeners are not fired
Piyush Joshi
Ranch Hand

Joined: Jun 10, 2011
Posts: 207

syed aq wrote:Donot use listener, in rare cases listeners are not fired

Can you please explain what are the cases when listeners will not be fired. (except when the server crashes)
 
I agree. Here's the link: http://aspose.com/file-tools
 
subject: Some errors with my ActiveSessions counter
 
Similar Threads
doubt in session
Limit access to web application
HttpSessionListener
How to Manage HttpSession with inactive time period?
How do you retrieve all the sessions?