Scenario design - Help wanted

Hi,

I am new to SAP XI. I wanted to work on the following scenario, Pls suggest me which adapter will be best to suit the following scenario.

I have a web application, when the user press the confirm submission, the data from web is posted to SAP and a confirmation has to be passed to the web system, I have to create 2 interfaces of this type.

In another couple of interfaces, I have to fetch data from SAP and pass it to the SQL Server.

Please let me know the best possible way.

Thanks

Selvam