1. Outbound Message Processing

This concept is about outbound interface processing. The real-time outbound interface can be done in different ways i.e Using a button, Using trigger, Using the process builder. For outbound processing, we have two categories:-

Synchronous:- Apex code wait for the response of the HTTP callout.
Asynchronous:- Apex code doesn’t wait for the response of the HTTP callout. It can have a response which is an asynchronous response. This response can come at any time.

ses our invokeCallout2() method. This method support SAP, SAP-PI, SAP-R/3, SFDC2SAPPI, SOAP, REST adapter types. The response could be a text of JSON, XML, List> based on given flag parameters in CallOutControl and Apex of each adapter handle setting when execute callout. InvokeCallout2() method support different mode:

SYNC
FUTURE
BATCH
AUTO

We get a real-time response in SYNC mode only.