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Session usage in JSP

saurav sarkar
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Joined: Jan 07, 2007
Posts: 180

Hi All,


Just a general question in JSP.If my app is used by loads of users
concurrently.Does using the session for retrieving the objects causes any problem?.

Most of objects are in request scope but in some cases i have to use session scope.So in those cases in my java classes i am using in the session.But while retrieving in the JSP i am using the request scope by putting the object in the request before forwarding it to the JSP.

Please help


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Bear Bibeault
Author and ninkuma
Marshal

Joined: Jan 10, 2002
Posts: 61433
    
  67

Session scope should only be used for user-specific data that needs to stick around for more than one request. For simply passing data from a controller servlet to a JSP for display, the request is the correct scope to use.

When creating session data, especially in an environment where there are many users, it's important to be sure to release any data that is no longer being used to avoid unnecessary memory overhead. This leads some misinformed shops to disallow use of the session completely -- which is pretty silly. Just be sure to do a bit of housekeeping to make sure that session data doesn't hang around for longer than it needs to.
[ February 12, 2008: Message edited by: Bear Bibeault ]

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It is sorta covered in the JavaRanch Style Guide.
 
subject: Session usage in JSP