Hello Andre,
I am already aware about push notification , receiving data is the problem.
I cannot have one instance always running to receive data pushed from SAP.
I want to consume external web service in SAP , whenever data is pushed it handles it , this is web application not mobile device , in mobile it is easy to have receiver.
i can have background service running but i don't to use it.
How can this be achieved using SAP Gateway.
Regards
Manish