spring.microservices.in.action

Spring Microservices in Action consists of 10 chapters and two appendixes: Chapter 1 introduces you to why the microservices architecture is an important and relevant approach to building applications, especially cloud-based applications. Chapter 2 walks you through how to build your first REST-based microservice using Spring Boot. This chapter will guide you in how to look at your microser- vices through the eyes of an architect, an application engineer, and a DevOps engineer. Chapter 3 introduces you to how to manage the configuration of your microser- vices using Spring Cloud Config. Spring Cloud Config helps you guarantee that your service’s configuration information is centralized in a single repository, versioned and repeatable across all instances of your services. Chapter 4 introduces you to one of the first microservice routing patterns: ser- vice discovery. In this chapter, you’ll learn how to use Spring Cloud and Net- flix’s Eureka service to abstract away the location of your services from the clients consuming them. Chapter 5 is all about protecting the consumers of your microservices when one or more microservice instances is down or in a degraded state. This chapter will demonstrate how to use Spring Cloud and Netflix Hystrix (and Netflix Ribbon) to implement client-side load balancing of calls, the circuit breaker pattern, the fallback pattern, and the bulkhead pattern. Chapter 6 covers the microservice routing pattern: the service gateway. Using Spring Cloud with Netflix’s Zuul server, you’ll build a single entry point for all microservices to be called through. We’ll discuss how to use Zuul’s filter API to build policies that can be enforced against all services flowing through the ser- vice gateway. Chapter 7 covers how to implement service authentication and authorization using Spring Cloud security and OAuth2. We’ll cover the basics of setting up an OAuth2 service to protect your services and also how to use JavaScript Web Tokens (JWT) in your OAuth2 implementation. Chapter 8 looks at how you can introduce asynchronous messaging into your microservices using Spring Cloud Stream and Apache Kafka. Chapter 9 shows how to implement common logging patterns such as log corre- lation, log aggregation, and tracing using Spring Cloud Sleuth and Open Zipkin. Chapter 10 is the cornerstone project for the book. You’ll take the services you’ve built in the book and deploy them to Amazon Elastic Container Service (ECS). We’ll also discuss how to automate the build and deployment of your microservices using tools such as Travis CI. Appendix A covers how to set up your desktop development environment so that you can run all the code examples in this book. This appendix covers how the local build process works and also how to start up Docker locally if you want to run the code examples locally. Appendix B is supplemental material on OAuth2. OAuth2 is an extremely flexi- ble authentication model, and this chapter provides a brief overview of the dif- ferent manners in which OAuth2 can be used to protect an application and its corresponding microservices.