where HttpSession's setAttribute("attributename",object) Object will be stored?

Question

class SessionStorage extends HttpServlet
{       
   public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException 
    {
        HttpSession session=request.getSession();
        int schoolId=100;
        session.setAttribute("schoolId", schoolId);     
    }

}

I just want to know where the schoolId attribute is stored. Either it is on the web container (ex. tomcat) or in Memory (eg .RAM). And which location i will find this attributes if it on the server?

Check this answer https://stackoverflow.com/questions/7885525/where-is-the-httpsession-data-stored — jeet427, Jan 24 '18 at 07:24
Possible duplicate of [Where is the HttpSession data stored?](https://stackoverflow.com/questions/7885525/where-is-the-httpsession-data-stored) — daniele3004, Jan 24 '18 at 07:30

score 0 · Answer 1 · answered Jan 24 '18 at 07:06

0

SchooldId is saved in the HttpSession (on tomcat). The HttpSession itself is stored in the server's Memory (RAM). You can only look up the value again when a new request for the same http session arrives on the server.

answered Jan 24 '18 at 07:06

gus3001

851
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JVM is running on Server So In JVM different Memory area (like Stack,heap,method Area) used to StoreData . In Which Area the HttpSession attributes stored. Correct me if i am wrong in above sentence. – Viju Jan 24 '18 at 09:10
The session is a java object, so that would be stored in the heap. – gus3001 Jan 24 '18 at 09:20
how does server know this attribute is for particular user , did it store session Id with attribute in heap? – Viju Jan 24 '18 at 10:53
Really depends on the implementation of the server but I imagine one could store it in a HashMap (which would also be contained in the heap). – gus3001 Jan 24 '18 at 11:26

score 0 · Answer 2 · answered Jan 24 '18 at 07:31

0

SchoolId will be stored in httpSession object. HttpSession will be created in tomcat or any other app/web server

answered Jan 24 '18 at 07:31

spandey

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where HttpSession's setAttribute("attributename",object) Object will be stored?

2 Answers2