Book Image

Architecting Modern Java EE Applications

By : Sebastian Daschner
Book Image

Architecting Modern Java EE Applications

By: Sebastian Daschner

Overview of this book

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.
Table of Contents (22 chapters)
Title Page
About the Author
About the Reviewer
Customer Feedback
Appendix: Links and further resources

12-factor applications and Java EE

As of writing this book, 12-factor applications has emerged as a way of developing Software as a Service (SaaS) applications. The 12-factor application approach define 12 software development principles. The motivations behind these principles aim to minimize time and effort, avoid software erosion, and embrace Continuous Delivery and cloud platforms.

In other words the 12-factors aim to to implement enterprise applications in a modern way. Some of the principles sound obvious to most engineers, while others seem to contradict the common practice of building enterprise applications.

The list of the 12-factors includes:

  • I. Have one codebase tracked in revision control, many deploys
  • II. Explicitly declare and isolate dependencies
  • III. Store config in the environment
  • IV. Treat backing services as attached resources
  • V. Strictly separate build and run stages
  • VI. Execute the app as one or more stateless processes
  • VII. Export services via port binding
  • VIII. Scale out via...