Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Conferences
Free Learning
Arrow right icon
Cloud-Native Applications in Java
Cloud-Native Applications in Java

Cloud-Native Applications in Java: Build microservice-based cloud-native applications that dynamically scale

Arrow left icon
Profile Icon Olsson Profile Icon S Profile Icon Kumar Gupta Profile Icon Mahajan
Arrow right icon
£16.99 per month
Full star icon Full star icon Full star icon Full star icon Half star icon 4.2 (51 Ratings)
Paperback Feb 2018 406 pages 1st Edition
eBook
£7.99 £32.99
Paperback
£41.99
Subscription
Free Trial
Renews at £16.99p/m
Arrow left icon
Profile Icon Olsson Profile Icon S Profile Icon Kumar Gupta Profile Icon Mahajan
Arrow right icon
£16.99 per month
Full star icon Full star icon Full star icon Full star icon Half star icon 4.2 (51 Ratings)
Paperback Feb 2018 406 pages 1st Edition
eBook
£7.99 £32.99
Paperback
£41.99
Subscription
Free Trial
Renews at £16.99p/m
eBook
£7.99 £32.99
Paperback
£41.99
Subscription
Free Trial
Renews at £16.99p/m

What do you get with a Packt Subscription?

Free for first 7 days. £16.99 p/m after that. Cancel any time!
Product feature icon Unlimited ad-free access to the largest independent learning library in tech. Access this title and thousands more!
Product feature icon 50+ new titles added per month, including many first-to-market concepts and exclusive early access to books as they are being written.
Product feature icon Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.
Product feature icon Thousands of reference materials covering every tech concept you need to stay up to date.
Subscribe now
View plans & pricing
Table of content icon View table of contents Preview book icon Preview Book

Cloud-Native Applications in Java

Writing Your First Cloud-Native Application

This chapter looks at the essential elements of building your first cloud-native application. We will do the minimal number of steps required to get a microservice running in our development environment.

If you are an experienced Java developer using IDEs such as Eclipse, you will find yourself on familiar turf. Though most of it will be similar to building traditional applications, there are a few nuances, which we will discuss in this chapter and summarize at the end.

The setup steps to get development going will vary based on the type of developer:

  • For hobbyist, self-employed, or working-from-home developers with open access to the internet, cloud development is relatively simple.
  • for enterprise developers who work on projects for customers or business teams in a closed environment and has to access the internet through a proxy,...

Setting up your developer toolbox

For any profession, the tools are very important, and that applies to coding as well. Before writing a line of code, we need to get the right equipment to start.

Getting an IDE

An integrated development environment (IDE) is more than a code editor; it includes the tools for autocompletion, syntax, formatting, and other miscellaneous features, such as search and replace. IDEs have advanced features such as refactoring, building, testing, and running the programs with the help of runtime containers.

The popular IDEs are Eclipse, IntelliJ IDEA, and NetBeans. Of the three, Eclipse is the most popular and open source IDE available for Java. It has a big community and is frequently updated...

Understanding the development life cycle

Professional software writing goes through various stages. In the following sections, we will talk about all the various stages we will follow while developing the application.

Requirements/user stories

It is important to know the problem statement being solved before starting any coding or design. Agile development methodology recommends breaking the overall project into modules and services, and then implementing a few features at a time as user stories. The idea is to get a minimally viable product (MVP) and then keep adding features.

The problem we have taken to solve is an area of e-commerce. Due to online shopping, most of us are familiar with e-commerce as consumers. It is time...

Selecting a framework

Having looked at the basics, let's write our product service. After IDE setup, the next step is to select a framework to write the service. The microservice architecture puts forward a few interesting design considerations that will help us select the frameworks:

  • Lightweight runtime: The service should be small in size and fast to deploy
  • High resiliency: It should have support for patterns such as circuit breaker and timeout
  • Measurable and monitorable: It should capture metrics and expose hooks for monitoring agents to tap into
  • Efficient: It should avoid blocking resources and enable high scalability and elasticity in the presence of increased load

A good comparison can be found at: https://cdelmas.github.io/2015/11/01/A-comparison-of-Microservices-Frameworks.html. Three frameworks are gaining popularity in the Java space that meet the preceding...

Writing a product service

For the sake of simplicity, our product service has two functions:

  • List<int> getProducts(int categoryId)
  • Product getProduct(int prodId)

The intent of the two methods is quite clear. The first returns a list of product IDs given a category ID, and the second returns product details (as an object) given a product ID.

Creating a Maven project

Open your IDE (Eclipse Neon or other) and then create a new Maven project as follows:

  1. Right-click on Package Explorer and select New and Project..., as shown in the following screenshot:
  1. Select Maven Project:
  1. In the next window of the wizard, choose Create a simple project.

 

  1. The next dialog will ask for many parameters. Of these...

Enabling cloud-native behaviors

We have just developed a basic service with two APIs that respond to requests. Let's add a few capabilities that will enable to it to be a good cloud citizen. We will discuss the following:

  • Externalizing configuration
  • Instrumentation—health and metrics
  • Service registration and discovery

Externalizing configuration

Configuration can be any property that is likely to differ between environments or production deployments. Typical examples are queue and topic names, ports, URLs, connection and pool properties, and so on.

A deployable should not have configuration in it. A configuration should be injected from outside. This makes the deployable unit immutable as it goes through the...

Summary

Let's review the key concepts of the cloud applications that we have discussed so far. We made our application lightweight by making it run on a servlet engine and start in less than 15 seconds. Our application is self-contained, as the fat JAR has all libraries to run our service. We just need a JVM to run this JAR file. It has externalized configuration (to some extent) by injecting environment from the command line and properties from application.yml and bootstrap.yml. We take a deeper look at the next stages of externalization in Chapter 7, Cloud-Native Application Runtime. The Spring actuator helped capturing all metrics and made their URL available for consumption, thus enabling instrumentation. The location abstraction was implemented by Eureka.

In the next chapters, we will enhance this service by adding to it a data tier and resiliency...

Left arrow icon Right arrow icon
Download code icon Download Code

Key benefits

  • Take advantage of the simplicity of Spring to build a full-fledged application
  • Let your applications run faster while generating smaller cloud service bills
  • Integrate your application with various tools such as Docker and ElasticSearch and use specific tools in Azure and AWS

Description

Businesses today are evolving so rapidly that they are resorting to the elasticity of the cloud to provide a platform to build and deploy their highly scalable applications. This means developers now are faced with the challenge of building build applications that are native to the cloud. For this, they need to be aware of the environment, tools, and resources they’re coding against. If you’re a Java developer who wants to build secure, resilient, robust, and scalable applications that are targeted for cloud-based deployment, this is the book for you. It will be your one stop guide to building cloud-native applications in Java Spring that are hosted in On-prem or cloud providers - AWS and Azure The book begins by explaining the driving factors for cloud adoption and shows you how cloud deployment is different from regular application deployment on a standard data centre. You will learn about design patterns specific to applications running in the cloud and find out how you can build a microservice in Java Spring using REST APIs You will then take a deep dive into the lifecycle of building, testing, and deploying applications with maximum automation to reduce the deployment cycle time. Gradually, you will move on to configuring the AWS and Azure platforms and working with their APIs to deploy your application. Finally, you’ll take a look at API design concerns and their best practices. You’ll also learn how to migrate an existing monolithic application into distributed cloud native applications. By the end, you will understand how to build and monitor a scalable, resilient, and robust cloud native application that is always available and fault tolerant.

Who is this book for?

Java developers who want to build secure, resilient, robust and scalable applications that are targeted for cloud based deployment, will find this book helpful. Some knowledge of Java, Spring, web programming and public cloud providers (AWS, Azure) should be sufficient to get you through the book.

What you will learn

  • See the benefits of the cloud environment when it comes to variability, provisioning, and tooling support
  • Understand the architecture patterns and considerations when developing on the cloud
  • Find out how to perform cloud-native techniques/patterns for request routing, RESTful service creation, Event Sourcing, and more
  • Create Docker containers for microservices and set up continuous integration using Jenkins
  • Monitor and troubleshoot an application deployed in the cloud environment
  • Explore tools such as Docker and Kubernetes for containerization and the ELK stack for log aggregation and visualization
  • Use AWS and Azure specific tools to design, develop, deploy, and manage applications
  • Migrate from monolithic architectures to a cloud native deployment

Product Details

Country selected
Publication date, Length, Edition, Language, ISBN-13
Publication date : Feb 26, 2018
Length: 406 pages
Edition : 1st
Language : English
ISBN-13 : 9781787124349
Languages :
Concepts :
Tools :

What do you get with a Packt Subscription?

Free for first 7 days. £16.99 p/m after that. Cancel any time!
Product feature icon Unlimited ad-free access to the largest independent learning library in tech. Access this title and thousands more!
Product feature icon 50+ new titles added per month, including many first-to-market concepts and exclusive early access to books as they are being written.
Product feature icon Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.
Product feature icon Thousands of reference materials covering every tech concept you need to stay up to date.
Subscribe now
View plans & pricing

Product Details

Publication date : Feb 26, 2018
Length: 406 pages
Edition : 1st
Language : English
ISBN-13 : 9781787124349
Languages :
Concepts :
Tools :

Packt Subscriptions

See our plans and pricing
Modal Close icon
£16.99 billed monthly
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Simple pricing, no contract
£169.99 billed annually
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Choose a DRM-free eBook or Video every month to keep
Feature tick icon PLUS own as many other DRM-free eBooks or Videos as you like for just £5 each
Feature tick icon Exclusive print discounts
£234.99 billed in 18 months
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Choose a DRM-free eBook or Video every month to keep
Feature tick icon PLUS own as many other DRM-free eBooks or Videos as you like for just £5 each
Feature tick icon Exclusive print discounts

Frequently bought together


Stars icon
Total £ 120.97
Cloud-Native Applications in Java
£41.99
Test-Driven Java Development, Second Edition
£41.99
Cloud Native Development Patterns and Best Practices
£36.99
Total £ 120.97 Stars icon
Banner background image

Table of Contents

13 Chapters
Introduction to Cloud-Native Chevron down icon Chevron up icon
Writing Your First Cloud-Native Application Chevron down icon Chevron up icon
Designing Your Cloud-Native Application Chevron down icon Chevron up icon
Extending Your Cloud-Native Application Chevron down icon Chevron up icon
Testing Cloud-Native Applications Chevron down icon Chevron up icon
Cloud-Native Application Deployment Chevron down icon Chevron up icon
Cloud-Native Application Runtime Chevron down icon Chevron up icon
Platform Deployment – AWS Chevron down icon Chevron up icon
Platform Deployment – Azure Chevron down icon Chevron up icon
As a Service Integration Chevron down icon Chevron up icon
API Design Best Practices Chevron down icon Chevron up icon
Digital Transformation Chevron down icon Chevron up icon
Other Books You May Enjoy Chevron down icon Chevron up icon

Customer reviews

Top Reviews
Rating distribution
Full star icon Full star icon Full star icon Full star icon Half star icon 4.2
(51 Ratings)
5 star 47.1%
4 star 35.3%
3 star 11.8%
2 star 2%
1 star 3.9%
Filter icon Filter
Top Reviews

Filter reviews by




S. Tanguturi Apr 27, 2019
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Excellent book! Provides thorough coverage of micro service theory and practical details in simple, easy to understand language.
Amazon Verified review Amazon
Amit Paul Feb 11, 2023
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Udemy Verified review Udemy
Raquib Shoeb Feb 02, 2023
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Udemy Verified review Udemy
Anadi Hati Dec 12, 2022
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Udemy Verified review Udemy
Sasmita Subudhi Oct 19, 2022
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Udemy Verified review Udemy
Get free access to Packt library with over 7500+ books and video courses for 7 days!
Start Free Trial

FAQs

What is included in a Packt subscription? Chevron down icon Chevron up icon

A subscription provides you with full access to view all Packt and licnesed content online, this includes exclusive access to Early Access titles. Depending on the tier chosen you can also earn credits and discounts to use for owning content

How can I cancel my subscription? Chevron down icon Chevron up icon

To cancel your subscription with us simply go to the account page - found in the top right of the page or at https://subscription.packtpub.com/my-account/subscription - From here you will see the ‘cancel subscription’ button in the grey box with your subscription information in.

What are credits? Chevron down icon Chevron up icon

Credits can be earned from reading 40 section of any title within the payment cycle - a month starting from the day of subscription payment. You also earn a Credit every month if you subscribe to our annual or 18 month plans. Credits can be used to buy books DRM free, the same way that you would pay for a book. Your credits can be found in the subscription homepage - subscription.packtpub.com - clicking on ‘the my’ library dropdown and selecting ‘credits’.

What happens if an Early Access Course is cancelled? Chevron down icon Chevron up icon

Projects are rarely cancelled, but sometimes it's unavoidable. If an Early Access course is cancelled or excessively delayed, you can exchange your purchase for another course. For further details, please contact us here.

Where can I send feedback about an Early Access title? Chevron down icon Chevron up icon

If you have any feedback about the product you're reading, or Early Access in general, then please fill out a contact form here and we'll make sure the feedback gets to the right team. 

Can I download the code files for Early Access titles? Chevron down icon Chevron up icon

We try to ensure that all books in Early Access have code available to use, download, and fork on GitHub. This helps us be more agile in the development of the book, and helps keep the often changing code base of new versions and new technologies as up to date as possible. Unfortunately, however, there will be rare cases when it is not possible for us to have downloadable code samples available until publication.

When we publish the book, the code files will also be available to download from the Packt website.

How accurate is the publication date? Chevron down icon Chevron up icon

The publication date is as accurate as we can be at any point in the project. Unfortunately, delays can happen. Often those delays are out of our control, such as changes to the technology code base or delays in the tech release. We do our best to give you an accurate estimate of the publication date at any given time, and as more chapters are delivered, the more accurate the delivery date will become.

How will I know when new chapters are ready? Chevron down icon Chevron up icon

We'll let you know every time there has been an update to a course that you've bought in Early Access. You'll get an email to let you know there has been a new chapter, or a change to a previous chapter. The new chapters are automatically added to your account, so you can also check back there any time you're ready and download or read them online.

I am a Packt subscriber, do I get Early Access? Chevron down icon Chevron up icon

Yes, all Early Access content is fully available through your subscription. You will need to have a paid for or active trial subscription in order to access all titles.

How is Early Access delivered? Chevron down icon Chevron up icon

Early Access is currently only available as a PDF or through our online reader. As we make changes or add new chapters, the files in your Packt account will be updated so you can download them again or view them online immediately.

How do I buy Early Access content? Chevron down icon Chevron up icon

Early Access is a way of us getting our content to you quicker, but the method of buying the Early Access course is still the same. Just find the course you want to buy, go through the check-out steps, and you’ll get a confirmation email from us with information and a link to the relevant Early Access courses.

What is Early Access? Chevron down icon Chevron up icon

Keeping up to date with the latest technology is difficult; new versions, new frameworks, new techniques. This feature gives you a head-start to our content, as it's being created. With Early Access you'll receive each chapter as it's written, and get regular updates throughout the product's development, as well as the final course as soon as it's ready.We created Early Access as a means of giving you the information you need, as soon as it's available. As we go through the process of developing a course, 99% of it can be ready but we can't publish until that last 1% falls in to place. Early Access helps to unlock the potential of our content early, to help you start your learning when you need it most. You not only get access to every chapter as it's delivered, edited, and updated, but you'll also get the finalized, DRM-free product to download in any format you want when it's published. As a member of Packt, you'll also be eligible for our exclusive offers, including a free course every day, and discounts on new and popular titles.