Why am I getting a null session?

[FreshmenProgrammer]

Thanks in advance for helping me with my question. I just have a question about sessions. I log in my app login page then I set an id in the session eg.

request.getSession().setAttribute("Id", Id);

So it's set in the session (i comfirmed this by pulling it out of the session in the same controller and printing). Now I come into the same app from a link in an email about 30 seconds after I log in. If Id is null I want to be sent to the app login page else just sent right into the app But for some reason when I come into the app from an email link i get a null value for Id when I just set it in the login controller. Anyone know why. Thanks?

 

[sedj]

Does the link open a new browser window ?

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Free Java/J2EE Database Connection Pooling Software

http://www.primrose.org.uk

 

[Diancecht]

Or is the request redirected in any moment?

Cheers,
Dian

 

[FreshmenProgrammer]

Yes new window. But shouldn't you still be able to see the session.

 

[FreshmenProgrammer]

String Id = (String)request.getSession().getAttribute("Id");

if(Id == null){
response.sendRedirect(response.encodeRedirectURL("a.jsp"));
}else{
response.sendRedirect(response.encodeRedirectURL("a.jsp"));
}

the code will be something like this in the email controller

 

[FreshmenProgrammer]

What im trying to do is in a previous app an email request is sent which is a link in an email when you click on it if you are logged into the app that handles that request go right into the app else you are redirected to the loggin page to loggin the program.

 

[sedj]

If its a new browser, then its a new session ...

--------------------------------------------------
Free Java/J2EE Database Connection Pooling Software

http://www.primrose.org.uk

 

[FreshmenProgrammer]

Oh really Is there any way to get into the old session at all.

 

[FreshmenProgrammer]

Is there a way maybe when you log into the app to set a session ID as the loggin name. Then you can get that session from a different browser window and check if your attributes are null or not.