ABAP _ RESTful _ Programming _ Model.pdf
- 1. PUBLIC Product Management Technology Platform, SAP 2019 Overview of the ABAP RESTful Programming Model in SAP Cloud Platform ABAP Environment
- 2. 2 PUBLIC © 2019 SAP SE or an SAP affiliate company. All rights reserved. ǀ Legal disclaimer The information in this presentation is confidential and proprietary to SAP and may not be disclosed without the permission of SAP. This presentation is not subject to your license agreement or any other service or subscription agreement with SAP. SAP has no obligation to pursue any course of business outlined in this document or any related presentation, or to develop or release any functionality mentioned therein. This document, or any related presentation, and SAP’s strategy and possible future developments, products, and platforms, directions, and functionality are all subject to change and may be changed by SAP at any time for any reason without notice. The information in this document is not a commitment, promise, or legal obligation to deliver any material, code, or functionality. This document is provided without a warranty of any kind, either express or implied, including but not limited to the implied warranties of merchantability, fitness for a particular purpose, or noninfringement. This document is for informational purposes and may not be incorporated into a contract. SAP assumes no responsibility for errors or omissions in this document, except if such damages were caused by SAP’s willful misconduct or gross negligence. All forward-looking statements are subject to various risks and uncertainties that could cause actual results to differ materially from expectations. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of their dates, and they should not be relied upon in making purchasing decisions. For all recent and planned innovations, potential data protection and privacy features include simplified deletion of personal data, reporting of personal data to an identified data subject, restricted access to personal data, masking of personal data, read access logging to special categories of personal data, change logging of personal data, and consent management mechanisms.
- 3. 3 PUBLIC © 2019 SAP SE or an SAP affiliate company. All rights reserved. ǀ After completing this learning module, you will be able to: Understand the mission of the ABAP RESTful Programming Model Understand how the new programming model improves developers live Understand the meaning of business objects and business services Objectives
- 4. 4 PUBLIC © 2019 SAP SE or an SAP affiliate company. All rights reserved. ǀ Programming Model: The Mission … supporting the product qualities User experience: SAP Fiori and SAP HANA Cloud: scalability ABAP assets: non-functional requirements … for the development of SAP Fiori apps and Cloud APIs / A2X services… … offering an end-to-end experience standardized development flow best practices & development guides high development efficiency focus on business logic, rather than technical aspects … for customers and partners in SAP S/4HANA … for SAP internal development in SAP S/4HANA … for customers and partners in SAP Cloud Platform ABAP Environment … and being flexible Break-outs for non-standardized implementations Out-of-the-box extensibility & verticalization Reuse components / APIs in “freestyle” development scenarios PROVIDE A PROGRAMMING MODEL …
- 5. 5 PUBLIC © 2019 SAP SE or an SAP affiliate company. All rights reserved. ǀ Agenda The ABAP RESTful Programming Model Why and what? Business Objects Definition, Demo, Roadmap Business Services Definition, Demo, Roadmap
- 6. The ABAP RESTful Programming Model Why and what?
- 7. 7 PUBLIC © 2019 SAP SE or an SAP affiliate company. All rights reserved. ǀ Improvement of the ABAP Programming Model Integration of existing code and Development Efficiency EXISTING TECHNOLOGIES EXISTING APPLICATION CODE End-2-end development experience ADT only tools Intuitive development flow Extensibility and verticalization out-of-the-box Native CDS and ABAP language support No code generation Only typed APIs for main implementation tasks Business Objects as ABAP first class citizens Integration of existing code Service enablement ABAP RESTful PROGRAMMING MODEL
- 8. 8 PUBLIC © 2019 SAP SE or an SAP affiliate company. All rights reserved. ǀ Guiding Principles ABAP RESTful Programming Model All standard development tasks… ... are based on ABAP Development Tools in Eclipse … with an end-to-end development experience … with native CDS / ABAP language support (for 80% use cases) Typed signatures Static code checks Auto-completion, Element Info… There is … NO use of generic framework APIs … NO code generation … NO redundancy in transport-objects Improved lifecycle (transport, patches,…)
- 9. 9 PUBLIC © 2019 SAP SE or an SAP affiliate company. All rights reserved. ǀ ABAP RESTful Programming Model BUSINESS OBJECTS QUERIES DATA MODELLING & BEHAVIOUR SERVICE BINDING Bind the service to OData protocol SERVICE DEFINITION Define scope to be exposed BUSINESS SERVICES PROVISIONING SAP Fiori UI Consume OData UI services A2X Consume OData A2X services SERVICE CONSUMPTION Data modelling with CDS Behaviour Definition Behaviour implementation Data modelling with CDS
- 10. 10 PUBLIC © 2019 SAP SE or an SAP affiliate company. All rights reserved. ǀ ABAP RESTful Programming Model Business Services Entry-point of service implementation Expose service protocol specifically Test / Preview tools Service definition via projection of data and behaviour Universe of Business Objects & analytical data models and their related business logic SERVICE BINDING DATA & BEHAVIOUR DEFINITION SERVICE DEFINITION
- 11. 11 PUBLIC © 2019 SAP SE or an SAP affiliate company. All rights reserved. ǀ ABAP RESTful Programming Model Business Services No domain specific support today future SERVICE BINDING SERVICE DEFINITION CDS consumption views CDS NON CDS SEGW - RDS REF TO MAINT_SERVICE Classic SAP GUI transactions No clear entry point / dev flow SERVICE BINDING OData V4 Service ICF: active Role: not assigned OAuth: … Navigation to service model Clear dev flow Service entry-point Overview of related artefacts Eclipse based development CDS NON CDS SERVICE DEFINITION Clear responsibilities Eclipse based development No generation of artefacts MDE MDE MDE MDE Viewer Viewer Code generation … …
- 12. 12 PUBLIC © 2019 SAP SE or an SAP affiliate company. All rights reserved. ǀ ABAP RESTful Programming Model Business Objects DATA & BEHAVIOUR DEFINITION Development flow not intuitive (CDS and BOPF tooling) Generation of artefacts (BOPF metadata generation based on CDS artefacts) Untyped signature (BOPF consumer and provider API) CDS data model Clear development flow (CDS for data modelling with ABAP language extensions for behaviour) No redundancy and no generation of artefacts (clear references on language level) Typed APIs (For BO consumer and provider) ➔ The Business Object becomes an ABAP first class citizen (Known by ABAP compiler, language and tools including static checks) today future CDS data model @composition BOPF business object Business object viewer BDL Behaviour for BO in ABAP implemented Outline generate reference
- 13. 13 PUBLIC © 2019 SAP SE or an SAP affiliate company. All rights reserved. ǀ Fiori Elements Preview Service model CDS editor: Projection views MDE SERVICE DEFINITION MDE MDE MDE MDE ABAP RESTful Programming Model Big Picture SERVICE BINDING DATA & BEHAVIOUR DEFINITION SERVICE DEFINITION MDE Service Definition viewer Service viewer SERVICE BINDING Business object viewer CDS editor: CDS entities Table entity View entity ABAP entity Class editor action, determination, validation BO Test-shell BUSINESS OBJECT MDE MDE PROTOCOL SPECIFIC PROTOCOL AGNOSTIC
- 14. BUSINESS OBJECTS
- 15. 15 PUBLIC © 2019 SAP SE or an SAP affiliate company. All rights reserved. ǀ What is a Business Object (BO)? BO STRUCTURE 1 3 2 ROOT COMPOSITION BO BEHAVIOUR CUD, Actions, Functions, Locks, eTag, Authorizations, Feature Control, Draft BO RUNTIME INTERACTION PHASE SAVE SEQUENCE TX buffer R
- 16. 16 PUBLIC © 2019 SAP SE or an SAP affiliate company. All rights reserved. ǀ Business Object Runtime SAP HANA finalize SAVE SEQUENCE create_by_association execute_action read_by_association INTERACTION PHASE check_before_save adjust_numbers save read delete update create BUSINESS OBJECT RUNTIME execute_function MODIFY READ lock LOCK TX buffer
- 17. 17 PUBLIC © 2019 SAP SE or an SAP affiliate company. All rights reserved. ǀ Business Objects – Status Overview SAP HANA finalize SAVE SEQUENCE MODIFY READ INTERACTION PHASE check_before_save adjust_numbers save TX buffer MANAGED Green field development 2 (MANAGED WITH) SAVE SELF-IMPLEMENTED Update task function module available (e.g. Business Partner, Product,..) 3 UNMANAGED Application coding available (e.g. Purchase Order, Sales Order,…) 1 LOCK
- 18. 18 PUBLIC © 2019 SAP SE or an SAP affiliate company. All rights reserved. ǀ Business Objects - Unmanaged SAP HANA SAVE SEQUENCE checkBeforeSave adjustNumbers save Application coding already available for interaction phase, transactional buffer and save sequence decoupled from UI technology Examples Sales Order, Purchase Order Adapter finalize MODIFY READ INTERACTION PHASE LOCK APPLICATION CODE TX Buffer
- 19. 19 PUBLIC © 2019 SAP SE or an SAP affiliate company. All rights reserved. ǀ finalize Business Objects – Managed SAP HANA Application coding not yet available or fine granular reusable code available technical implementation aspects taken over by BO infrastructure developer focus on business logic, implemented via determinations, validation, actions,… Examples New applications in SAP Cloud Platform ABAP Environment Business Logic via determinations, validations MODIFY READ INTERACTION PHASE LOCK SAVE SEQUENCE checkBeforeSave adjustNumbers save MANAGED RUNTIME TX Buffer
- 20. 20 PUBLIC © 2019 SAP SE or an SAP affiliate company. All rights reserved. ǀ Business Objects – Save Unmanaged SAP HANA Function module for UPDATE TASK Application coding “update-task function module” available coding for interaction phase not available (e.g. highly coupled in older UI technology: DYNP - PBO / PAI) technical implementation aspects to be taken over by BO infrastructure Examples Business Partner, Product MODIFY READ INTERACTION PHASE LOCK SAVE SEQUENCE checkBeforeSave adjustNumbers save finalize MANAGED RUNTIME TX Buffer SAP HANA Application code in determinations / validations / …
- 21. 21 PUBLIC © 2019 SAP SE or an SAP affiliate company. All rights reserved. ǀ Business Objects - Roadmap ADT development experience: Business Object onboarding Support for managed BO runtime (with unmanaged save) Business Object Access API Draft, feature control (incl. authorizations) Role-specific service projections Support for managed BO runtime: determinations and validations 1 2 3 4 5 6
- 23. 23 PUBLIC © 2019 SAP SE or an SAP affiliate company. All rights reserved. ǀ ABAP RESTful Programming Model BUSINESS OBJECTS QUERIES DATA MODELLING & BEHAVIOUR SERVICE BINDING Bind the service to OData protocol SERVICE DEFINITION Define scope to be exposed BUSINESS SERVICES PROVISIONING SAP Fiori UI Consume OData UI services A2X Consume OData A2X services SERVICE CONSUMPTION Data modelling with CDS Behaviour Definition Behaviour implementation Data modelling with CDS
- 24. 24 PUBLIC © 2019 SAP SE or an SAP affiliate company. All rights reserved. ǀ Business Services Big Picture– Runtime stack SAP FIORI SAP HANA SAP CLOUD PLATFORM ABAP ENVIRONMENT GATEWAY SADL MANAGED OPEN SQL UNMANAGED APPL CODE MANAGED UNMANAGED APPL CODE A2X Query BO Runtime SAP FIORI SAP HANA SAP S/4HANA CLOUD GATEWAY SADL MANAGED OPEN SQL UNMANAGED APPL CODE MANAGED Query BO Runtime
- 25. 25 PUBLIC © 2019 SAP SE or an SAP affiliate company. All rights reserved. ǀ A2X SERVICE A2X SERVICE BOs Model Behaviour Runtime BOs Model Behaviour Runtime Business Services Big Picture– Design Time stack BOs Model Behaviour Runtime ABAP PLATFORM DATA & BEHAVIOUR BUSINESS SERVICES SERVICE MODEL DEFINITION SERVICE MODEL DEFINITION SERVICE DEFINITION project A2X SERVICE expose A2X SERVICE A2X SERVICE UI SERVICE Value help UI annotations Feature control Release / Whitelisting Versioning Compatibility check OData V2 / V4 BOs Model Behaviour Runtime BOs Model Behaviour Runtime Queries Model/ Structure Behaviour Runtime project Sort Filter Text search Managed: SQL Custom: ABAP queries
- 26. 26 PUBLIC © 2019 SAP SE or an SAP affiliate company. All rights reserved. ǀ Business Services - Roadmap A2X OData V4 outbound services Versioning, release and compatibility check for A2X OData V2 and OData V4 Inbound services for A2X consumption of OData V2 and OData V4 SAP Fiori UI OData V4 services 1 2 3 4
- 27. Contact information: Product Management Technology Platform, SAP Thank you.