[opencms-dev] State shared between the JSPs

[Karri Sankar Rao]

Hi Paul,

Thanks for your reply. Here is the code.
HttpSession sess = request.getSession(true);

sess.setAttribute("whitePaperRegistrationMailId",regDetails.getEmailId());

String mailId = (String)sess.getAttribute("whitePaperRegistrationMailId");

out.println("Mail id is :"+mailId); //This is working fine in same JSP.



When I am trying to access from another JSP with the below code, I am getting null value.
HttpSession sess = request.getSession(false);

String mailId = (String)sess.getAttribute("whitePaperRegistrationMailId");

out.println("Mail id is :"+mailId); //I am getting null value.

I think the problem is with OpenCMS. Does OpenCMS provide any session management?

Thanks,
Sankar.K
From: opencms-dev-bounces at opencms.org [mailto:opencms-dev-bounces at opencms.org] On Behalf Of Paul-Inge Flakstad
Sent: Wednesday, January 23, 2013 4:40 PM
To: The OpenCms mailing list
Subject: Re: [opencms-dev] State shared between the JSPs

Hi Sankar,

You do realize you're trying to modify a final object in your illustration code..?
final CmsRequestContext requestContext = cmsObject.getRequestContext();
requestContext.setAttribute("someObj ", someObj);

Anyway -- my preferred recipe goes like this:
// Fetch the session object (don't use the implicitly available variable "session")
HttpSession sess = request.getSession(true); // You may or may not want to pass the boolean here
// Then do like this:
sess.setAttribute(...);
sess.getAttribute(...);

Not forgetting to put session="true" in the @page directive:
<%@page import="..." session="true" %>

You should also be able to use request.setAttribute(...) and request.getAttribute(...) -- just like that, using the implicitly available variable "request". (The stored object will of course live only for as long as the request lives.)

NOTE: If you're using flex cache, be aware. It doesn't always play nice with this. It's supposed to work (if configured correctly) with the session approach, but I've had to disable flex cache for some of my JSPs where I do stuff like this.

HTH :)

Cheers,
Paul

From: opencms-dev-bounces at opencms.org [mailto:opencms-dev-bounces at opencms.org] On Behalf Of Karri Sankar Rao
Sent: 23. januar 2013 11:16
To: opencms-dev at opencms.org
Subject: [opencms-dev] State shared between the JSPs

Hi,

I am working on OpenCMS application. I am new to OpenCMS.

I have one object which I want to keep it in session so that I can use it in other JSPs.
I tried in 2 ways to get this.

a)      Initially I used JSP implicit variable i.e session.setAttribute("someObj",someObj). But this session object is not available in other JSPs. I am getting null when I try to retrieve using session.getAttribute("someObj");

b)      Then I used another approach.

CmsJspActionElement cms = new CmsJspActionElement(pageContext, request, response);

final CmsObject cmsObject = cms.getCmsObject();

final CmsRequestContext requestContext = cmsObject.getRequestContext();

requestContext.setAttribute("someObj ", someObj);



I am not sure whether it is in request scope or session scope. When I tried to access it in another JSP, getting null value.



CmsJspActionElement cms=new CmsJspActionElement(pageContext, request, response);

final CmsObject cmsObject = cms.getCmsObject();

final CmsRequestContext requestContext = cmsObject.getRequestContext();

Object obj = requestContext.getAttribute("someObj ");

Could you please let me know how to resolve this.

Your help is highly appreciated.

Thanks,
Sankar.K



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