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Prevent multiple logins

 
Greenhorn
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i have make login module.i have check multiple login prevent using hash table and remove the entry from hash table when user logout.but problem is that when user close window without logout than how i will remove entry of hash table.is any listerner give me information or another method?

[Removed the 'shouting' and provided a meaningful topic - Dave]
[ March 14, 2007: Message edited by: David O'Meara ]
 
Ranch Hand
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Hibernate Spring Java
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You can create a listener that implements javax.servlet.http.HttpSessionListener interface. This listener notify your about session creation and destroy events
 
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You need to write some sort of clever javascript to invalidate the session on browser kill. Have a look at this forum: http://forum.java.sun.com/thread.jspa?threadID=537660&messageID=2640996
 
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