SAP Gateway and OData

Carsten Bönnen works for SAP SE as a product management director in the Adoption Enablement Team for SAP Business Technology Platform (SAP BTP). He received his MA in computer linguistics and artificial intelligence in Germany in 2001 and started working at SAP that same year. Initially a Java developer and trainer, he soon became a consultant and led strategic projects in the then-new field of enterprise portals. Since 2002, he has worked as a product manager for SAP NetWeaver Portal, SAP NetWeaver Visual Composer, SAP Gateway, and SAP API Management. For another four years, he has worked as the director for technology strategy for the strategic alliance management at Microsoft. Ludwig Diehl is the head of processes and IT at Wilkhahn, the worldwide acting and leading German manufacturer of furniture. In this role, Ludwig is responsible for digitalization, business processes, and IT services and infrastructure. He has previously worked in this field in various roles and at various companies. Ludwig studied business informatics at the University of Applied Sciences FHDW in Bergisch Gladbach, Germany. He was a member of the SAP Design Partner Council for SAP Gateway from 2011 to 2013. In this role, he worked with SAP and other partners to improve SAP Gateway. Volker Drees studied electrical engineering at Fachhochschule in Wiesbaden, Germany, and holds a degree in communications engineering (Nachrichtentechnik). He began his SAP career in 1998 in the consulting department and has experience in a number of areas: ABAP development, R/3 implementations, mySAP CRM, mobile sales, mobile asset management, and mobile infrastructure. He recently worked as a regional group expert for mobile applications in the Business User and Information Worker Division at SAP. Currently, Volker works at SAP SE as a product expert for SAP Gateway and the ABAP programming model for SAP Fiori in the Products & Innovation, Core Platform Division. André Fischer is an SAP Champion and has worked in product management for SAP Gateway since the launch of the product in 2011. His current focuses in the product management of the ABAP platform are the ABAP RESTful application programming model and SAP BTP, ABAP environment. After finishing his physics degree at RWTH Aachen University and Heidelberg University, Germany, he started his professional career in 1995 as a technology and security consultant for an SAP partner. In 2004, he joined SAP. Over the past 20 years at SAP, André has focused on the interoperability of SAP NetWeaver and Microsoft technologies, SAP Enterprise Search, single sign-on (SSO), SAP Gateway, the ABAP RESTful application programming model, and SAP BTP, ABAP environment. André is a frequent speaker at conferences, including SAP TechEd, and he has published a multitude of articles and blogs on the SAP Community. With more than 30 years of experience in various SAP technologies, André is a trusted advisor for many SAP customers and partners. Karsten Strothmann is the lead product manager for event-driven integration at SAP SE in Walldorf, Germany. He has 25 years of experience in the software industry, more than 20 of which at SAP. Karsten is currently working on event-driven architectures and SAP's event-driven technology ecosystem. Previously, Karsten worked on SAP Gateway for 6 years, from its very beginnings through to its fruition. During his career, he has applied himself to highly varied roles, from product management, to development, to quality assurance, to consulting. This has given him a holistic view of both software creation and its usage. Karsten holds a master's degree in computer science from Technical University Dortmund, Germany. 

... Foreword by Jürgen Müller ... 17
... Introduction ... 19
... Acknowledgments ... 23
... PART I: Getting Started ... 25
1 ... Introduction to SAP Gateway ... 27
1.1 ... Modern Business Applications ... 28
1.2 ... SAP Gateway for Modern Business Applications ... 39
1.3 ... SAP Gateway in SAP S/4HANA ... 43
1.4 ... Installation and Deployment ... 45
1.5 ... SAP Gateway and Related Products ... 52
1.6 ... Summary ... 57
2 ... Introduction to OData ... 59
2.1 ... OData and REST ... 59
2.2 ... Structure of an OData Service ... 67
2.3 ... OData Operations ... 76
2.4 ... OData Query Options ... 78
2.5 ... OData in SAP Solutions ... 94
2.6 ... SAP Gateway OData Features ... 101
2.7 ... What's Different with OData 4.0? ... 104
2.8 ... Summary ... 108
3 ... Architecture and Integration ... 109
3.1 ... Gateway Principles ... 109
3.2 ... SAP Gateway Architecture ... 111
3.3 ... Integration with Other Technologies ... 121
3.4 ... ABAP Programming Model for SAP Fiori ... 125
3.5 ... ABAP RESTful Application Programming Model ... 133
3.6 ... Summary ... 141
4 ... Deployment Options, Installation, and Configuration ... 143
4.1 ... Introduction to SAP Gateway Deployment ... 143
4.2 ... Preparing for Installation and Configuration ... 155
4.3 ... Quick Start Guide ... 157
4.4 ... Installation and Configuration in Detail ... 164
4.5 ... Summary ... 175
... PART II: Service Creation ... 177
5 ... Introduction to OData Service Creation ... 179
5.1 ... Methods for Creating an OData Service ... 180
5.2 ... Service Creation Process Overview ... 182
5.3 ... SAP Gateway Toolset ... 186
5.4 ... Steps in the Service Creation Process ... 196
5.5 ... OData Channel Development Paradigm ... 216
5.6 ... Summary ... 221
6 ... Service Development ... 223
6.1 ... Data Model Definition ... 224
6.2 ... Service Registration ... 250
6.3 ... Service Stub Generation ... 255
6.4 ... Service Maintenance ... 257
6.5 ... Incremental Service Implementation and Model Enhancement ... 261
6.6 ... Summary ... 335
7 ... Service Generation ... 337
7.1 ... Generation via RFC/BOR Interface ... 340
7.2 ... Generation via Search Help ... 372
7.3 ... Generation via Redefinition ... 374
7.4 ... Generation via Analytical Queries ... 382
7.5 ... Summary ... 392
8 ... ABAP Programming Model for SAP Fiori ... 395
8.1 ... Development of CDS Views ... 397
8.2 ... Modeled Data Sources ... 403
8.3 ... Referenced Data Sources ... 408
8.4 ... Adding Annotations to an OData Service ... 413
8.5 ... ABAP Programming Model for SAP Fiori with Classic APIs ... 416
8.6 ... ABAP Programming Model for SAP Fiori with BOPF ... 426
8.7 ... Summary ... 438
9 ... ABAP RESTful Application Programming Model ... 441
9.1 ... Data Modeling ... 443
9.2 ... Business Service Exposure ... 455
9.3 ... Service Consumption ... 467
9.4 ... Transactional Behavior ... 471
9.5 ... Generating an Application Using ABAP Development Tools ... 491
9.6 ... Entity Manipulation Language ... 495
9.7 ... Business Object Characteristics ... 499
9.8 ... Summary ... 504
... PART III: Application Development ... 505
10 ... SAPUI5 Application Development ... 507
10.1 ... Building Blocks of Web Application Development ... 508
10.2 ... Introduction to SAP Fiori and SAPUI5 ... 509
10.3 ... Creating an SAPUI5 Application ... 515
10.4 ... Summary ... 517
11 ... SAP Business Application Studio ... 519
11.1 ... Setting Up SAP Business Application Studio ... 520
11.2 ... Connecting to SAP Gateway ... 524
11.3 ... OData Sample Services ... 532
11.4 ... Developing SAP Fiori Applications ... 534
11.5 ... Summary ... 549
12 ... Extensibility ... 551
12.1 ... Redefining and Extending SAP Gateway OData Services ... 551
12.2 ... Extending OData Services in SAP S/4HANA ... 581
12.3 ... Extending SAP Fiori Applications Using SAPUI5 Flexibility ... 601
12.4 ... Summary ... 607
13 ... Mobile Application Development ... 609
13.1 ... Overview ... 610
13.2 ... Mobile Development Kits ... 611
13.3 ... Native Application Development ... 628
13.4 ... Summary ... 646
14 ... Social Media Application Development ... 647
14.1 ... PHP ... 648
14.2 ... Facebook ... 652
14.3 ... X ... 659
14.4 ... Sina Weibo (êVòQî˜îé) ... 663
14.5 ... Summary ... 674
15 ... Enterprise Application Development ... 675
15.1 ... Microsoft Excel ... 676
15.2 ... Microsoft SharePoint/Microsoft 365 ... 685
15.3 ... Microsoft Visual C# Windows Desktop ... 692
15.4 ... Microsoft ASP.NET ... 697
15.5 ... Summary ... 697
... PARt IV: Administration ... 699
16 ... Lifecycle Management: Testing, Service Deployment, and Operations ... 701
16.1 ... Testing ... 702
16.2 ... Service Deployment ... 710
16.3 ... Operations ... 720
16.4 ... DevOps and SAP Gateway Development ... 728
16.5 ... Summary ... 730
17 ... Security ... 731
17.1 ... Network and Communication Security ... 731
17.2 ... User Management and Authorizations ... 739
17.3 ... Single Sign-On and Authentication Options ... 741
17.4 ... Recommended Authentication Options ... 750
17.5 ... Summary ... 766
... Appendices ... 769
A ... Advanced Topics ... 769
B ... The Authors ... 793
... Index ... 797