RE: How to Protect the user to login in Multiple system (Multiple browser) when the session is active.

["Raghupathy, Gurumoorthy" <Gu...@nielsen.com>]

My answer is "It depends"..... 

If the volume (number of hits) of your website is low and your server is
on a single node then you can create a hashtable of users (user name as
key) as an CONTEXT attribute and each time someone logs in you can check
the user against the key in the hashtable ... if the keay already exists
tell them to 
Get lost and once the user is logged off you can remove them from the
hash.. 


If your application is running as part of a farm then store the status
in DB / persistence medium. However there will be a performance hit 

Have a look at 

http://java.sun.com/j2ee/sdk_1.3/techdocs/api/javax/servlet/ServletConte
xt.html  


One pattern which can be of helps is "observer pattern" which will
observe user logging in and logging out....   when used as a filter ....


http://java.sun.com/products/servlet/Filters.html 


some of the questions you have been asking on the forum has nothing to
do with struts ... it is all about servlet specification .... 

Read them at 
http://jcp.org/aboutJava/communityprocess/final/jsr154/index.html 

My suggestion will again be RTFM 


Regards
Guru

-----Original Message-----
From: Srinivasula Reddy A , Bangalore [mailto:srinivasulaa@hcl.in] 
Sent: 06 June 2007 07:51
To: Struts Users Mailing List
Subject: How to Protect the user to login in Multiple system (Multiple
browser) when the session is active. 


Hi Team,

            How to protect the user to login in multiple browsers when
the session is action.

 

For example in gmail if we login in one browser and we are surfing, then
if we open another IE and type gmail it will redirect to the page where
we are surfing in the previous IE.

 

I need this kind of feature for my login system. How to implement this
in struts 

 

Give me some sample snippet or rough idea

 

Regards,

Sreenivasula Reddy A

 



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