Changes in extension data not always sent to CRM Backend

Hi,
In a CRM 5.0 ISA b2b scenario we run into a problem:
Short description:
Changes in extension data on basket item level are only sent to the backend if there are additional changes to that item (for example a change in quantity).
Long description:
We have added an extension field on basket item level and use the standard extension mechanism to exchange this data to the CRM backend. In order to do this we have done the following:
- On the Java side we implemented MaintainBasketDispatcherAction and ShowBasketAction. The overridden methods are parseRequest() (from MaintainBasketDispatcherAction) and isaPerform() (from ShowBasketAction).
- In the backend we implemented the BADI CRM_ISA_BASKET_ITEMS and implemented the methods CHANGEITEMS_SET_DATA, CLEAR, GETITEMS_GET_DATA and SAVE.
We experience a problem when creating an order: When the only thing that changes in an item is our custom field, this is not noticed by the webshop as a change in the item. Therefore the method CHANGEITEMS_SET_DATA isn't called and the extension data isn't updated. If we change another field of an item, for example the quantity, the change is picked up and the method CHANGEITEMS_SET_DATA is being called.
It seems that somewhere an optimization is taking place where the Webshop decides that unchanged lines should not be sent to the backend. I can't find a way to tell the webshop that the lines are modified (i.e. are dirty).
Has anyone experienced similar behaviour or does anyone know of a solution?
Thanks in advance.
Wilco Menge
Java snippet:
parseRequest():
ItemList itemList = preOrderSalesDocument.getItems();
String extensionData = "";
if (itemList!=null && itemList.size()>0)
 for (int i=0;i<itemList.size();i++)
 if (itemList.get(i)!=null);
 extensionData = parser.getParameter("z_extension_data").getValue().getString();
 itemList.get(i).addExtensionData("ZEXTENSION", extensionData);

Hi Pranay,
I need to add a new field to the ISA item sales order in B2B webshop.
I'm trying to use the extension field in the ISA basket item.
I have added a new field in the WEB sales order at item level.
My collegues have changed and implemented the addExtensionData method of the ItemSalesDoc JAVA class.
Moreover I have implemented CRM_ISA_BASKET_ITEMS (BAdI CHANGEITEMS_BEFORE_ORDER) in the backend system.
In the BAdI CHANGEITEMS_BEFORE_ORDER I have copied the extensions data values to the CT_SALES table. Specifically, I have tried to update and change the SUBMISSION field.
It seems that this new value is stored until the GET method (GETITEMS_GET_DATA) is called.
Indeed, when the system calls the GETITEMS_GET_DATA method, I read the CT_SALES buffer using the CRM_ORDER_READ function.
But the new value is no more stored in buffer.
So if I fill the new field in the ISA item sales order, and I click the update button, the new value is no more valued in the screen.
Furthermore, it could be important to know that I'm working in CRM 3.0 release.
Do you know why? May you help me?
Many Thanks
Best Regards.
Daniela

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