The document discusses the integration of OpenAPI 3.0 with SAP Process Orchestration (SAP PO) using the Kate RESTful adapter, highlighting its growing importance in the industry. It outlines steps to implement OpenAPI services in SAP PO, including modeling, importing, and exposing APIs with minimal configuration. The document emphasizes the compatibility of this solution with SAP PO versions starting from 7.3, paving the way for modern API management capabilities.

1. Open API 3.0 with SAP PO
Expose RESTful APIs in “API first” approach on SAP
PO with the KaTe RESTful adapter

2. Open API 3.0 with SAP PO
● OpenAPI is the defacto standard to describe and document APIs with a wide
range of industry players supporting it.
● There are new offers by SAP (e.g. API management and SAP CPI, but SAP
Process Orchestration (SAP PO) is still widely used as on premise platform
for integrating SAP systems and will be for a while onwards
● How can we productively use OpenAPIs with SAP PO as it has near no native
support?

3. Open API 3.0 with SAP PO & KaTe RESTful adapter
Steps to implement an OpenAPI:
● Model your service as OpenAPI with any API modeling tool out there (e.g.
Swagger UI)
● Generate and Import the Description (as WSDL) into your SAP PO ESR with
the KaTe RESTful adapter’s toolset
● Implement operations and test via SwaggerUI console in SAP PO
● Expose it to the “outside world” via either the original modeled OpenAPI
description or the PO representation.

4. Open API 3.0 with SAP PO & KaTe RESTful adapter
Here we simply use Open API Petstore as example, but you could model any
RESTful Service in OpenAPI 3.0 descriptor format (https://petstore.swagger.io)

5. Open API 3.0 with SAP PO & KaTe RESTful adapter
Generate ESR representation of your Open API 3.0 or Swagger 2.0 descriptions

6. Open API 3.0 with SAP PO & KaTe RESTful adapter
Import Open API (WSDL) and implement operations...

7. Open API 3.0 with SAP PO & KaTe RESTful adapter
The generator generates simple XML schema representations of all openAPI
operations that the adapter produces/consumes at runtime, grouped as a service

8. Open API 3.0 with SAP PO & KaTe RESTful adapter
Expose your operations via SAP PO Iflow (here just a simple router to the original
Swagger petstore to demo 1:1 conversion of in/outbound calls)

9. Open API 3.0 with SAP PO & KaTe RESTful adapter
Sender channel of the Iflow uses “OpenAPI” mode and exposes the api under
/petstore root path

10. Open API 3.0 with SAP PO & KaTe RESTful adapter
Receiver channel just hits the petstore example directly (/v2 root path) and “Open
API” mode.

11. Open API 3.0 with SAP PO & KaTe RESTful adapter
● Your API will automatically show up in the Adapter UI and is exposed as the
same OpenAPI 3.0 or Swagger 2.0 description under basepath /petStore

12. Click on the Links will transfer you to a SwaggerUI hosted on the adapter
Open API 3.0 with SAP PO & KaTe RESTful adapter

13. Test drive APIs, full schema is exposed and readable
Open API 3.0 with SAP PO & KaTe RESTful adapter

14. Test drive APIs, all defined responses, enums and schemas are available
Open API 3.0 with SAP PO & KaTe RESTful adapter

15. Can’t teach an old dog new tricks?
This works on any SAP PO upwards 7.3 with:
● Near zero channel configuration (paths/methods/status codes/JSON-XML)
● Cleanly work just with PO mappings for implementation
● WSDL schema ensures OpenAPI definition compliant implementation with
SAP PO’s ESR tools
Welcome to the API age with SAP Process Orchestration!
Open API 3.0 with SAP PO & KaTe RESTful adapter

16. Open API 3.0 with SAP PO & KaTe RESTful adapter
Interested in a 30 day trial ? Contact us
KaTe GmbH
Quellenstraße 7, 70376 Stuttgart, Germany
Phone: +49 711 90 79 64 65 Fax: +49 711 90 79 64 66 E-Mail: info @ kate-group.com
http://en.kate-group.de/sap-beratung-services-projektmanagment/restful-adapter-for-sap-po/