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Mastering Spring Cloud

Mastering Spring Cloud

By : Piotr Mińkowski
4.3 (3)
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Mastering Spring Cloud

Mastering Spring Cloud

4.3 (3)
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 (17 chapters)
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Component tests


If you have provided the unit tests for all the key classes and interfaces in the application, you may proceed to the component tests. The main idea of component tests is to instantiate the full microservice in memory using in-memory test doubles and data stores. This allows us to skip the network connections. While for unit tests we were mocking all the database or HTTP clients, here we do not mock anything. We provide an in-memory data source for the database client and we simulate HTTP responses for the REST client.

Running tests with an in-memory database

One of the reasons I chose MongoDB is that it can be easily embedded with a Spring Boot application for testing purposes. To enable an embedded MongoDB for your project, include the following dependency in Maven pom.xml:

<dependency>
    <groupId>de.flapdoodle.embed</groupId>
    <artifactId>de.flapdoodle.embed.mongo</artifactId>
    <scope>test</scope>
</dependency>

Spring...

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