Book Image

Modern API Development with Spring and Spring Boot

By : Sourabh Sharma
Book Image

Modern API Development with Spring and Spring Boot

By: Sourabh Sharma

Overview of this book

The philosophy of API development has evolved over the years to serve the modern needs of enterprise architecture, and developers need to know how to adapt to these modern API design principles. Apps are now developed with APIs that enable ease of integration for the cloud environment and distributed systems. With this Spring book, you'll discover various kinds of production-ready API implementation using REST APIs and explore async using the reactive paradigm, gRPC, and GraphQL. You'll learn how to design evolving REST-based APIs supported by HATEOAS and ETAGs and develop reactive, async, non-blocking APIs. After that, you'll see how to secure REST APIs using Spring Security and find out how the APIs that you develop are consumed by the app's UI. The book then takes you through the process of testing, deploying, logging, and monitoring your APIs. You'll also explore API development using gRPC and GraphQL and design modern scalable architecture with microservices. The book helps you gain practical knowledge of modern API implementation using a sample e-commerce app. By the end of this Spring book, you'll be able to develop, test, and deploy highly scalable, maintainable, and developer-friendly APIs to help your customers to transform their business.
Table of Contents (21 chapters)
1
Section 1: RESTful Web Services
7
Section 2: Security, UI, Testing, and Deployment
12
Section 3: gRPC, Logging, and Monitoring
16
Section 4: GraphQL

Workflow and tooling for GraphQL

As a per-data graph way of thinking in GraphQL, data is exposed using an API consisting of graphs of objects. These objects are connected using relations. GraphQL only exposes a single API endpoint. Clients query this endpoint that uses a single data graph. On top of that, the data graph may resolve data from a single source, or multiple sources, by following the OneGraph principle of GraphQL. These sources can be a database, legacy system, or services that expose data using REST/gRPC/SOAP.

The GraphQL server can be implemented in the following two ways:

  • Standalone GraphQL service: A standalone GraphQL service contains a single data graph. It could be a monolithic app or microservice architecture that fetches the data from single or multiple sources (having no GraphQL API).
  • Federated GraphQL services: It's very easy to query a single data graph for comprehensive data fetching. However, enterprise applications are made using multiple...