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SAP ADAPTERS

SAP interfacing solution based on AMUN middleware and AMUN SAP adapter

Amun middleware based on SOA principles:

  • AMUN WS Orchestration
    -     BPEL – ability to create complex business Web Services  based on existing  and legacy services

  • Enterprise service bus
    • Message data transformation
    • Guaranteed message delivery
    • Message persistence
    • Rule Engine – message filtering
  • Security
    • Logging – robust, configurable logging services
    • Auditing – pre-defined audit rules, views and reports for logged tracks
    • Identity management – offers possibility to aggregate and manage user identities over all SAP and nonSAP applications

 

Technical specification
SAP allows two different modes of operations for communication with external systems thus there are two major types of adapters for SAP: Client AdapterServer Adapter.


Client Adapter – behaves the same way as an end-user sitting behind SAP client console. The client application creates connection to SAP system via RFC utilizing username and password of an actual user thus it has to obey the same security model e.g. the client application can only work with data and functions allowed by the role that has been assigned to such a user.

SAP system does not require any registration of client a has no knowledge of such client application other then knowledge of a user account used.

Server Adapter – implements functions that are called up by an RFC client. The adapter server program is registered via the SAP Gateway and waits for inbound RFC calls. An RFC server program registers itself under a program ID to an SAP gateway.    If an RFC call is passed on from any SAP system to this SAP gateway with the option “Connection with a registered program” (with the same program ID), the connection takes place with the corresponding server application.   Once an RFC function has been executed, the server waits for further RFC calls from the same or other SAP systems.  If an RFC connection is interrupted or terminated, the server application automatically registers itself again on the same SAP gateway under the same program ID.

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