Microservices in SAP HANA XSA: A Guide to REST APIs Using Node.js

Description

Build enterprise-grade microservices in the SAP HANA Advanced Model (XSA). This book explains building scalable APIs in XSA and the benefits of building microservices with SAP HANA XSA. This book covers the cloud foundry (CF) architecture and how SAP HANA XSA follows the model. It begins with the details of the different architectural layers of applications hosted in XSA (specifically, microservices). Everything you need to know is presented, including analyzing requests, modularization, database ingestion, building JSON responses, and scaling your microservices. You will learn to use developmental tools such as the SAP WEB IDE, POSTMAN, and the SAP HANA Cockpit for XSA, including debugging examples on SAP HANA XSA with code snippets showing how microservices can be developed, debugged, scaled, and deployed on SAP HANA XSA. Microservices are divided into security and authentication, request handling, modularization of Node.js, and interaction with the SAP HANA database containers and response formatting. An end-to-end scenario is presented of a Node.js REST API that uses HTTP methods, concluding with deploying an SAP HANA XSA project to a production environment. This book is simple enough to help you implement a Node.js module in order to understand the development of microservices, and complex enough for architects to design their next business-ready solution integrating UAA security, application modularization, and an end-to-end REST API on SAP HANA XSA. What You Will Learn Know the definition and architecture of cloud foundry and its application on SAP HANA XSAUnderstand REST principles and different HTTP methodsExplore microservices (Node.js) developmentDatabase interaction from Node (executing SQL statements and stored procedures) Who This Book Is For Architects designing business-ready solutions that integrate UAA security, application modularization, and an end-to-end REST API on SAP HANA XSA Table of Contents About the Author About the Technical Reviewers Acknowledgments Introduction Chapter 1: Architecture of SAP HANA XSA SAP HANA Cloud Foundry (CF) Open source SAP HANA to HANA XSA mta.yaml Conclusion Chapter 2: Security model in XSA User Account and Authorization service (UAA) OAuth 2.0 Custom user-provided services – CUPS Cross-schema access using synonyms Conclusion Chapter 3: Tools for development on HANA XSA SAP Web IDE and connecting to GIT Database Explorer SAP HANA XS Advanced Cockpit POSTMAN REST client Conclusion Chapter 4: SAP HANA XSA NodeJS development Development of REST APIs Compatibility mode with XSJS Node dependencies Debugging the Node JS (api) module Conclusion Chapter 5: Deployment scenarios of HANA XSA MTA project and versioning SAP Web IDE deployments Scaling microservices via SAP HANA cockpit for XSA Conclusion Appendix A: Sources Used in Writing This Book Index