What is RAP transactional message in SAP BC-ESI-RAP - RESTful ABAP Programming Model?

SAP Term: RAP transactional message

• Component: BC-ESI-RAP

• Component Name: RESTful ABAP Programming Model

• Description: A message in the reported structure tha is independent of the state of the entity instance. Transition messages are RAP messages that do not have a state area assigned. There are instance transition messages and static transition messages.

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• 
  Key Concepts: 
  RAP transactional message is a component of the BC-ESI-RAP RESTful ABAP Programming Model. It is a messaging service that enables communication between different applications and systems. It allows for asynchronous communication, meaning that messages can be sent and received without having to wait for a response. The messages are sent in JSON format and can be used to trigger events, send notifications, or exchange data. 
  
  How to use it: 
  RAP transactional message can be used to send and receive messages between different applications and systems. To send a message, you need to specify the target application, the message type, and the payload. The payload is the data that will be sent with the message. To receive a message, you need to register a listener for the target application and message type. The listener will then be triggered when a message is received. 
  
  Tips & Tricks: 
  When sending messages, make sure to include all necessary information in the payload so that the recipient can process it correctly. When receiving messages, make sure to register a listener for each application and message type that you want to receive. This will ensure that all messages are received correctly. 
  
  Related Information: 
  For more information on RAP transactional message, please refer to the SAP Help Portal (https://help.sap.com/viewer/product/BC-ESI-RAP/latest/en-US).