Invalid session error when trying to transfer line items to shopping basket

Question

Hi All,
I have a requirement in E-Commerce application.
when a user searches for a product in B2B webshop in 'products' tab in left frame, search results table get displayed which will have a shopping basket icon for each line item.
There we can transfer only a single item to shopping basket.
if we want to transfer more than one item, again shopping basket icon has to be clicked..
Now my requirement is that I have to add check boxes before each line item and a button below the results table ,so that when it is cliked, all the checked items should move to shopping basket in a shot.
I added a button and called '/catalog/updateitems.do' (onclick of buttton) which is the action called when  'transferselection' button in 'productISA.jsp' is clicked.
Now I am getting  an error saying 'Invalid session' when that button is clicked. I am not able to guess the reason.
And also I want to ask experts, is this the correct way of proceeding for the requirement ?
I am new to E-Commerce and any pointers in this regard will be of great help.
Thanks,
Anasuya.

Answer 1

Hello Anasuya,
Any reason why Catalog is not used but "Product" search list is used in the process? Catalog gives a more organized way of displaying and searching capabilities and makes the buying experience simple. Product search is a convenience tool for power users when you know the product.
Without major UI changes - like de-framing, the use of Product search for "Add to Cart" of all "selected" products from search list will not excite the end users. Catalog is a powerful tool that is available to you. Unless you have a strong business reason, it is better to use the features the way they are intended. You need to go back to the drawing board with your customer.
Anyway, I am assuming that you are doing a POC. I will give the same help I provided for your previous message on a similar topic. Re: Null poiner exception when trying to store extension data in existing BO.  We need to understand the basics of Servlet / JSP. Just adding any action (calling servlet) from any page (JSP) may not help. We must understand that the action (servlet) may be expecting many values in the request context which is available in the page (JSP) it was placed in. If that action is blindly placed in another page, it is highly unlikely that it will work, unless, you also took the pain to provide the servlet behind that action with the data it is expecting. So, adding the action from _'productsISA.jsp' _ in organizer-content-product-search1.jsp will have bad results. If you have done the required changes to the JSP, then let us know the changes you have done to really understand the issue.
If you have not done so, here is what you can do for the POC. If you look at the JSP organizer-content-product-search1.jsp, it doesn't have any useful <INPUT tags that would pass on the Product data to the servlet. So
Surround the product (tech key) with <Input tag. (Hint: see productISA.jsp)
I am sure you already have this for the quantity1 and the new checkbox.
Add a button to a custom action.
inside the custom action read all the items and create a simple Java List of  BasketTransferItem. Use BasketTransferItemImpl to actually use the instance.
Use methods setProductKey(String techKey), setQuantity(String quantity) and if you know the UoM use setUnit(String unit) to set the BasketTransferItemImpl object.
Add each instance of BasketTransferItem to the java List.
Now, place this list object in the request context under the attribute name baskettransferitemlist.
On success forward to "addtodocument"
Make proper changes to config.xml
I hope this will work without much changes.
(Note: This is not a cake served in a plate, but just a tested recipe for the cake. Please cook it nicely. If you need the cake immediately, then hire a Chef! - )
Easwar Ram
http://www.parxlns.com