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Architecting Modern Java EE Applications
Architecting Modern Java EE Applications

Architecting Modern Java EE Applications: Designing lightweight, business-oriented enterprise applications in the age of cloud, containers, and Java EE 8

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Architecting Modern Java EE Applications

Designing and Structuring Java Enterprise Applications

Every piece of software is designed in a certain way. The design includes the architecture of the system, structure of the projects, and structure and quality of the code. It can either communicate the intentions well or obfuscate them. Engineers need to design an enterprise application or system, before it is implemented. In order to do that, the purpose and motivations of the software need to be clear.

This chapter will cover:

  • What aspects to focus on when developing software
  • Project build structures and Java EE build systems
  • How to structure enterprise projects modules
  • How to realize module package structures

The purpose of enterprise applications

Behind every action, be it in daily life, big organizations, or software projects, there should be a reason. We humans need reasons why we are doing things. In enterprise software development, there is no difference.

When we build software applications, the first question asked should be why?. Why is this piece of software needed? Why is it reasonable or required to spend time and effort to develop a solution? And why should the company care about developing that solution itself?

In other words, what is the application's purpose? What problem is this piece of software trying to solve? Do we want the application to implement an important business process? Will it generate revenue? Is it going to gather revenue directly, for example by selling products, or indirectly by marketing, supporting customers, or business processes? Are there...

Outer enterprise project structure

Having the goal of business use cases in mind, let's move our focus a bit more down to earth to real-world enterprise projects. In later chapters, we will see what methods are there to help us reflecting the business domains in the architecture in a suitable way.

Business and team structures

Software projects are usually developed by a team of engineers, software developers, or architects. For simplicity, we will call them developers. Software developers, architects, testers, and all kind of engineers should arguably program from time to time.

However, in most situations we have several people working simultaneously on a software project. This already requires us to take a few things...

Enterprise project code structure

After seeing how we can organize our enterprise project structure, let's have a closer look at the detailed structure within a project. Assuming we have modeled an enterprise system that is reasonable in size and responsibility, we now map the concerns of the project into code structures.

Previously, we have discussed vertical versus horizontal module layers. This is precisely one of the aspects we need to look into when structuring the project.

Situation in enterprise projects

The structure of typical enterprise projects has traditionally been a three-tier architecture. Three-tiers means three technically motivated layers, namely the presentation, business, and data layer. That being...

Summary

Enterprise software should be built with the main priority to solve business problems, leading to business-driven applications and technology rather than to technology-driven solutions. The business use cases are what ultimately will generate revenue for the company.

If possible, enterprise applications should be developed in one build project per artifact, kept under version control. Splitting up a project into several, independent build modules that are in the end boiled down to a single artifact, doesn't add much value. For the coarse project structure it's advisable to structure the software modules vertically, not horizontally. This means to structure by business rather than technical concerns. Looking at the project structure should immediately tell developers what the project's domain and responsibilities are about.

An individual application module...

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Key benefits

  • Understand the principles of modern Java EE and how to realize effective architectures
  • Gain knowledge of how to design enterprise software in the age of automation, Continuous Delivery and Cloud platforms
  • Learn about the reasoning and motivations behind state-of-the-art enterprise Java technology, that focuses on business

Description

Java EE 8 brings with it a load of features, mainly targeting newer architectures such as microservices, modernized security APIs, and cloud deployments. This book will teach you to design and develop modern, business-oriented applications using Java EE 8. It shows how to structure systems and applications, and how design patterns and Domain Driven Design aspects are realized in the age of Java EE 8. You will learn about the concepts and principles behind Java EE applications, and how to effect communication, persistence, technical and cross-cutting concerns, and asynchronous behavior. This book covers Continuous Delivery, DevOps, infrastructure-as-code, containers, container orchestration technologies, such as Docker and Kubernetes, and why and especially how Java EE fits into this world. It also covers the requirements behind containerized, zero-dependency applications and how modern Java EE application servers support these approaches. You will also learn about automated, fast, and reliable software tests, in different test levels, scopes, and test technologies. This book covers the prerequisites and challenges of distributed systems that lead to microservice, shared-nothing architectures. The challenges and solutions of consistency versus scalability will further lead us to event sourcing, event-driven architectures, and the CQRS principle. This book also includes the nuts and bolts of application performance as well as how to realize resilience, logging, monitoring and tracing in a modern enterprise world. Last but not least the demands of securing enterprise systems are covered. By the end, you will understand the ins and outs of Java EE so that you can make critical design decisions that not only live up to, but also surpass your clients' expectations.

Who is this book for?

This book is for experienced Java EE developers who are aspiring to become the architects of enterprise-grade applications, or software architects who would like to leverage Java EE to create effective blueprints of applications.

What you will learn

  • What enterprise software engineers should focus on
  • Implement applications, packages, and components in a modern way
  • Design and structure application architectures
  • Discover how to realize technical and cross-cutting aspects
  • Get to grips with containers and container orchestration technology
  • Realize zero-dependency, 12-factor, and Cloud-native applications
  • Implement automated, fast, reliable, and maintainable software tests
  • Discover distributed system architectures and their requirements
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Publication date, Length, Edition, Language, ISBN-13
Publication date : Oct 09, 2017
Length: 442 pages
Edition : 1st
Language : English
ISBN-13 : 9781788393850
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Length: 442 pages
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Language : English
ISBN-13 : 9781788393850
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Table of Contents

11 Chapters
Introduction Chevron down icon Chevron up icon
Designing and Structuring Java Enterprise Applications Chevron down icon Chevron up icon
Implementing Modern Java Enterprise Applications Chevron down icon Chevron up icon
Lightweight Java EE Chevron down icon Chevron up icon
Container and Cloud Environments with Java EE Chevron down icon Chevron up icon
Application Development Workflows Chevron down icon Chevron up icon
Testing Chevron down icon Chevron up icon
Microservices and System Architecture Chevron down icon Chevron up icon
Monitoring, Performance, and Logging Chevron down icon Chevron up icon
Security Chevron down icon Chevron up icon
Conclusion Chevron down icon Chevron up icon

Customer reviews

Top Reviews
Rating distribution
Full star icon Full star icon Full star icon Half star icon Empty star icon 3.6
(8 Ratings)
5 star 50%
4 star 12.5%
3 star 0%
2 star 25%
1 star 12.5%
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David R. Heffelfinger Dec 02, 2017
Full star icon Full star icon Full star icon Full star icon Full star icon 5
In this day and age of modern software development, being familiar with programming languages and APIs is only half the battle. There are other important concerns such as automated testing, continuous delivery, continuous deployment, automated testing, etc. This book goes beyond Java EE APIs, covering several aspects of modern software development, design and architecture.In addition to Java EE APIs, the book covers topics such as how to organize your code, which layers to use, etc. It also covers what design patterns to follow to avoid common pitfalls or solve common problems.In this brave new world of cloud computing and microservices, containerization and orchestration have become important topics software developers and architects need to be familiar with. The book covers containerization with Docker and orchestration with Kubernetes.Application monitoring is another topic that is covered in the book, using Prometheus as the monitoring tool.The book also has a chapter dedicated to testing, covering not only how to write tests, but providing advice on how to create well crafted tests. Coveres different test scopes such as Unit, Component, Integration, System, Performance and Stress tests. Covers embedded containers such as Arquillian so that Java EE applications can be fully tested, including things that are typically hard to test like, for example, transaction support.In this day and age, microservices have become extremely popular, the book offers advice on how to develop systems following this architecture while taking advantage of the latest Java EE 8 APIs.All in all, the book is a great resource for software architects developing systems in Java EE, highly recommended.
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Robert J Peressini Jan 05, 2018
Full star icon Full star icon Full star icon Full star icon Full star icon 5
It had been several years since I did a deep dive into Java Enterprise Edition. Until I read this book I did not understand the significance of some of the important changes that have occurred as they pertain to moving towards running Java applications in containers. One good example - "Zero Dependency Deployments". I think that this book should be required reading for anyone trying to migrate existing Java systems to the cloud. Well written, well edited, a great job all the way around. These days I try to work exclusively with PDF files (so that I can highlight, make comments, have access from anywhere etc.); and Packt does a great job of providing this format for all their technical books. For this reason I also find it easier to purchase such books directly from the publisher site rather than through Amazon.
Amazon Verified review Amazon
Andres Rivera Mar 06, 2018
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Good book, well explained. i recommend it
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Marta Nov 30, 2017
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Real life guide for real life enterprise projects. Explore every single aspect of the life cycle of a enterprise project. Very easy to read.
Amazon Verified review Amazon
Felipe Jun 17, 2018
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
Straight to the point, showing how simple it is to start a Java EE application, definitely worth to read. I'll use as a guide to my endeavors in Java EE world for sure.
Amazon Verified review Amazon
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