session expire exception

[Amit Indore]

Hi All,

I am using session in my jsp and fetching userid and name from session in every jsp. if 20 minutes,I do not do any thing on the project after that I start work on it. its gives nullpointerException.

If i login again then again it work finely.

what can i do for handling that type of Exception.
I am using Struts 1.1

I am waiting your response...........

Thanks
Anit Jain

[Sagar Rohankar]

Either check userid equality to null in every action, if its null, then redirect the user to login page

OR

use Filter class, which filter out each request as per the session validity !

[Amit Indore]

Hi All,
I wanti check session expire or not. So i write that code in my Action Class in Struts1.1 but when session is expire it is not sendRedirect from give action mapping.
Its give Error:java.lang.IllegalStateException: Cannot forward after response has been committed.
Code:
//----------------Check session Expire or not--
HttpSession session = request.getSession();
if(session.getAttribute("userinfo")== null)
{ System.out.println("session Expire" );
response.sendRedirect("Index.do");
}
Hi All,

I wanti check session expire or not. So i write that code in my Action Class in Struts1.1 but when session is expire it is not sendRedirect from give action mapping.
Code:
//----------------Check session Expire or not--
HttpSession session = request.getSession();
if(session.getAttribute("userinfo")== null)
{ System.out.println("session Expire" );
response.sendRedirect("Index.do");
}

Its give Error:java.lang.IllegalStateException: Cannot forward after response has been committed.
Sir, help me.What can do?

[Amit Indore]

Hi All,

I want check session expire or not. So i write that code in my Action Class in Struts1.1 but when session is expire it is not sendRedirect from give action mapping.
Code:
//----------------Check session Expire or not--
HttpSession session = request.getSession();
if(session.getAttribute("userinfo")== null)
{ System.out.println("session Expire" );
response.sendRedirect("Index.do");
}

Its give Error:java.lang.IllegalStateException: Cannot forward after response has been committed.
Sir, help me.What can do?

[Sagar Rohankar]

  //----------------Check session Expire or not--
HttpSession session = request.getSession();
if(session.getAttribute("userinfo")== null)
{ System.out.println("session Expire" );
response.sendRedirect("Index.do");
return null; // put return statement at last !
}  

Try this,

And As you are working in Action class , you can use mapping.findForward("session"); to forward to index.do page !

Googled this exception , you ll find lots of useful links !

[Amit Indore]

Sir,
If i use mapping.findForward("session"); then i need to put mapping in
struts- config .xml for every Action.

<forward name="session" path="/Index.do"/>

this is very heavy process. So please give another way.

Thanks

Amit Jain

[Sagar Rohankar]

Originally posted by Amit Indore:
Sir,
If i use mapping.findForward("session"); then i need to put mapping in
struts- config .xml for every Action.

No , you dont have, There is a tag in struts-config file as <global-forwards>

you can define this forward tag init , like

<global-forwards>
   <forward name="session" path="/Index.do"/>
</global-forwards>

Try this,