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

Failures and the circuit breaker pattern with Feign

The Feign client is, by default, integrated with Ribbon and Hystrix. This means that, if you wish, you can apply different approaches to deal with latency and timeouts in your system when using that library. The first of these approaches is a connection retry mechanism provided by the Ribbon client. The second is a circuit breaker pattern and a fallback implementation available under the Hystrix project, which has already been discussed in the previous sections of this chapter.

Retrying the connection with Ribbon

Hystrix is enabled by default for the application when using a Feign library. This means that you should disable it in the configuration settings if you do not want to use it. For the purpose of testing a retry mechanism with Ribbon, I suggest that you disable Hystrix. In order to enable connection retrying for Feign, you only have to set two configuration properties—MaxAutoRetries and MaxAutoRetriesNextServer. The important settings...