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Mastering Spring Cloud
Mastering Spring Cloud

Mastering Spring Cloud: Build self-healing, microservices-based, distributed systems using Spring Cloud

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Profile Icon Piotr Mińkowski
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$19.99 per month
Full star icon Full star icon Full star icon Full star icon Half star icon 4.3 (3 Ratings)
Paperback Apr 2018 432 pages 1st Edition
eBook
NZ$57.99 NZ$64.99
Paperback
NZ$80.99
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Free Trial
Renews at $19.99p/m
Arrow left icon
Profile Icon Piotr Mińkowski
Arrow right icon
$19.99 per month
Full star icon Full star icon Full star icon Full star icon Half star icon 4.3 (3 Ratings)
Paperback Apr 2018 432 pages 1st Edition
eBook
NZ$57.99 NZ$64.99
Paperback
NZ$80.99
Subscription
Free Trial
Renews at $19.99p/m
eBook
NZ$57.99 NZ$64.99
Paperback
NZ$80.99
Subscription
Free Trial
Renews at $19.99p/m

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Table of content icon View table of contents Preview book icon Preview Book

Mastering Spring Cloud

Spring for Microservices

I don't know many Java developers who have never touched Spring Framework. Actually, it consists of so many projects and can be used with many other frameworks that sooner or later you will be forced to try it. Although experiences with Spring Boot are rather less common, it has quickly gained a lot of popularity. In comparison with Spring Framework, Spring Boot is a relatively new solution. Its actual version is 2, instead of 5 for Spring Framework. What was the purpose of its creation? What is the difference between a running application with Spring Boot instead of the standard Spring Framework way?

Topics we will cover in this chapter include:

  • Using starters in order to enable additional features for the project
  • Using Spring Web library for implementing services that expose REST API methods
  • Customizing service configuration using properties...

Introducing Spring Boot

Spring Boot is dedicated to running standalone Spring applications, the same as simple Java applications, with the java -jar command. The basic thing that makes Spring Boot different than standard Spring configuration is simplicity. This simplicity is closely related to the first important term we need to know about, which is a starter. A starter is an artifact that can be included in the project dependencies. It does nothing more than provide a set of dependencies to other artifacts that have to be included in your application in order to achieve the desired functionality. A package delivered in that way is ready for use, which means that we don't have to configure anything to make it work. And that brings us to the second important term related to Spring Boot, auto-configuration. All artifacts included by the starters have default settings set...

Developing applications with Spring Boot

The recommended way to enable Spring Boot in your project is by using a dependency management system. Here, you can see a short snippet of how to include appropriate artifacts in your Maven and Gradle projects. Here is a sample fragment from the Maven pom.xml:

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.7.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>

With Gradle, we do not need to define parent dependency. Here's a fragment from build.gradle:

plugins {
id 'org.springframework.boot' version &apos...

API Documentation

Swagger is the most popular tool for designing, building, and documenting RESTful APIs. It has been created by SmartBear, the designers of a very popular tool for SOAP Web Services, SoapUI. I think that might be sufficient recommendation for those who have long experience with SOAP. Anyway, with Swagger, we can design APIs using notation and then generate source code from it, or the other way around, where we start with the source code and then generate a Swagger file. With Spring Boot, we use the second option. 

Using Swagger 2 together with Spring Boot

The integration between Spring Boot and Swagger 2 is realized by the Springfox project. It examines application at runtime to infer API semantics...

Spring Boot Actuator features

Just creating the working application and sharing standardized API documentation is not everything, especially if we are talking about microservices, where there are plenty of independent entities structuring one managed environment. The next important thing that needs to be mentioned is monitoring and gathering metrics from applications. In that aspect, Spring Boot also comes through. Project Spring Boot Actuator provides a number of built-in endpoints, which allow us to monitor and interact with the application. To enable it in our project, we should include spring-boot-starter-actuator in the dependencies. Here's a list of the most important Actuator endpoints:

Path Description
/beans Displays a full list of all the Spring beans initialized in the application.
/env Exposes properties from Spring’s Configurable Environment...

Developer tools

Spring Boot offers some other useful tools for developers. The really cool thing for me is that the application is automatically restarted whenever files on the project classpath change. If you use Eclipse as your IDE, the only thing you have to do to enable it is to add the spring-boot-devtools dependency to the Maven pom.xml. Then, try to change something in one of your classes and save it. The application automatically restarts, and it takes much less than stopping and starting in the standard way. When I start our sample application, it takes about 9 seconds, and automatic restart takes only 3 seconds:

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>

We can exclude some resources if there is no ...

Integrating application with database

You can find more interesting features described in the Spring Boot specification. I would like to spend more time describing other cool functionalities provided by that framework, but we should not go too far away from the main topic—Spring for microservices. As you may recall, through including embedded MongoDB in the project, I promised you a more advanced microservice example. Before starting to work on it, let's go back for a moment to the current version of our application. Its source code is available on my public GitHub account. Clone the following Git repository to your local machine: https://github.com/piomin/sample-spring-boot-web.git.

Building a sample application

...

Running the application

Let's start MongoDB using the Docker run command:

docker run -d --name mongo -p 27017:27017 mongo

Something that may be useful for us is the Mongo database client. Using this, it is possible to create a new database and add some users with credentials. If you have Docker installed on Windows, the default virtual machine address is 192.168.99.100. The Mongo container has port 27017 exposed as a result of setting the -p parameter inside the run command. Well, in fact, we do not have to create the database because, when we provide the name while defining the client connection, it will automatically be created if it doesn't exist: 

Next, we should create a user for the application with sufficient authority:

Finally, we should set the Mongo database connection settings and credentials in the application.yml configuration...

Introducing Spring Boot


Spring Boot is dedicated to running standalone Spring applications, the same as simple Java applications, with the java -jar command. The basic thing that makes Spring Boot different than standard Spring configuration is simplicity. This simplicity is closely related to the first important term we need to know about, which is a starter. A starter is an artifact that can be included in the project dependencies. It does nothing more than provide a set of dependencies to other artifacts that have to be included in your application in order to achieve the desired functionality. A package delivered in that way is ready for use, which means that we don't have to configure anything to make it work. And that brings us to the second important term related to Spring Boot, auto-configuration. All artifacts included by the starters have default settings set, which can be easily overridden using properties or other types of starters. For example, if you include spring-boot-starter...

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Key benefits

  • - Explore the wealth of options provided by Spring Cloud for wiring service dependencies in microservice systems.
  • - Create microservices utilizing Spring Cloud's Netflix OSS
  • - Architect your cloud-native data using Spring Cloud.

Description

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.

Who is this book for?

This book appeals to developers keen to take advantage of Spring cloud, an open source library which helps developers quickly build distributed systems. Knowledge of Java and Spring Framework will be helpful, but no prior exposure to Spring Cloud is required.

What you will learn

  • - Abstract Spring Cloud s feature set
  • - Create microservices utilizing Spring Cloud s Netflix OSS
  • - Create synchronous API microservices based on a message-driven architecture.
  • - Explore advanced topics such as distributed tracing, security, and contract testing.
  • - Manage and deploy applications on the production environment

Product Details

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Publication date, Length, Edition, Language, ISBN-13
Publication date : Apr 26, 2018
Length: 432 pages
Edition : 1st
Language : English
ISBN-13 : 9781788475433
Vendor :
Pivotal
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Product Details

Publication date : Apr 26, 2018
Length: 432 pages
Edition : 1st
Language : English
ISBN-13 : 9781788475433
Vendor :
Pivotal
Category :
Languages :
Tools :

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Table of Contents

16 Chapters
Introduction to Microservices Chevron down icon Chevron up icon
Spring for Microservices Chevron down icon Chevron up icon
Spring Cloud Overview Chevron down icon Chevron up icon
Service Discovery Chevron down icon Chevron up icon
Distributed Configuration with Spring Cloud Config Chevron down icon Chevron up icon
Communication Between Microservices Chevron down icon Chevron up icon
Advanced Load Balancing and Circuit Breakers Chevron down icon Chevron up icon
Routing and Filtering with API Gateway Chevron down icon Chevron up icon
Distributed Logging and Tracing Chevron down icon Chevron up icon
Additional Configuration and Discovery Features Chevron down icon Chevron up icon
Message-Driven Microservices Chevron down icon Chevron up icon
Securing an API Chevron down icon Chevron up icon
Testing Java Microservices Chevron down icon Chevron up icon
Docker Support Chevron down icon Chevron up icon
Spring Microservices on Cloud Platforms Chevron down icon Chevron up icon
Other Books You May Enjoy Chevron down icon Chevron up icon

Customer reviews

Rating distribution
Full star icon Full star icon Full star icon Full star icon Half star icon 4.3
(3 Ratings)
5 star 66.7%
4 star 0%
3 star 33.3%
2 star 0%
1 star 0%
ammax Jan 07, 2020
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Argomento molto interessante, trattato in modo semplice ma dettagliato, a supporto sono disponibili i vari esempi, mi sento di consigliarlo come una prima lettura di base
Amazon Verified review Amazon
srinivasan Aug 17, 2019
Full star icon Full star icon Full star icon Full star icon Full star icon 5
The best book for Spring Cloud as of today. Comprehensive description on various Spring Cloud components
Amazon Verified review Amazon
Christopher Hagler Oct 24, 2018
Full star icon Full star icon Full star icon Empty star icon Empty star icon 3
It is ok for a beginner. This book is a basic introduction to spring cloud
Amazon Verified review Amazon
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