Book Image

Mastering Spring Cloud

By : Piotr Mińkowski
Book Image

Mastering Spring Cloud

By: Piotr Mińkowski

Overview of this book

Developing, deploying, and operating cloud applications should be as easy as local applications. This should be the governing principle behind any cloud platform, library, or tool. Spring Cloud–an open-source library–makes it easy to develop JVM applications for the cloud. In this book, you will be introduced to Spring Cloud and will master its features from the application developer's point of view. This book begins by introducing you to microservices for Spring and the available feature set in Spring Cloud. You will learn to configure the Spring Cloud server and run the Eureka server to enable service registration and discovery. Then you will learn about techniques related to load balancing and circuit breaking and utilize all features of the Feign client. The book now delves into advanced topics where you will learn to implement distributed tracing solutions for Spring Cloud and build message-driven microservice architectures. Before running an application on Docker container s, you will master testing and securing techniques with Spring Cloud.
Table of Contents (22 chapters)
Title Page
Copyright and Credits
Packt Upsell

Customizing the Ribbon client

Several configuration settings of the Ribbon client may be overridden with Spring bean declarations. As with Feign, it should be declared in the client annotation field named configuration, for example,@RibbonClient(name = "account-service", configuration = RibbonConfiguration.class). The following features may be customized with this approach:

  • IClientConfig: The default implementation of this is DefaultClientConfigImpl.
  • IRule: This component is used to determine which service instance should be selected from a list. The ZoneAvoidanceRule implementation class is auto-configured.
  • IPing: This is a component that runs in the background. It is responsible for ensuring that the instances of service are running.
  • ServerList<Server>: This can be static or dynamic. If it is dynamic (as used by DynamicServerListLoadBalancer), a background thread will refresh and filter the list at a predefined interval. By default, Ribbon uses a static list of servers taken from configuration...