Pushing SAP Backend Updates to LCDS Middleware

Hi,

I am using the following architecture for my mobile application :

Flex client <-> LCDS middleware <-> SAP ERP Backend

I understand how I can synchronise and update client => middleware (=> client) changes, which can be persisted in the backend database with a (custom assembler). However, in my case, my "backend" is a SAP system, on which itself data can be saved.

What is the best practice to push changes from my backend to my middleware, so that my clients can get updated automatically with the new data from the backend ?

I have found this : http://help.adobe.com/en_US/LiveCycleDataServicesES/3.1/Developing/WS4 ba8596dc6a25eff5473e3781271fa38d0b-7fff.html but don't really know how to call thedata access object (DAO) in the LCDS middleware when SAP makes changes to the data.

Or do I need to call DataServiceTransaction.refreshFill() in certain intervals/connections ?

Does anyone have an idea or suggestion for this ?

Thanks in advance,

Nico