Java 9 Dependency Injection: Write loosely coupled code with Spring 5 and Guice

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Dependency Injection in Java 9

In the previous chapter, we got acquainted with the Dependency Injection Principle, IOC with different scenarios, and different types of Dependency Injection by writing code.

In this chapter, we will learn about the new features offered in Java 9. Specifically, we will learn about modularity in Java 9, modularity framework, types of modules offered in Java 9, and we will see Dependency Injection using modules.
This chapter will mainly cover the following topics:

Java 9 introduction
Modular Framework in Java 9
Dependency Injection using Java 9 Modular Framework

Key benefits

•Use DI to make your code loosely coupled to manage and test your applications easily on Spring 5 and Google Guice

•Learn the best practices and methodologies to implement DI

•Write more maintainable Java code by decoupling your objects from their implementations

Description

Dependency Injection (DI) is a design pattern that allows us to remove the hard-coded dependencies and make our application loosely coupled, extendable, and maintainable. We can implement DI to move the dependency resolution from compile-time to runtime. This book will be your one stop guide to write loosely coupled code using the latest features of Java 9 with frameworks such as Spring 5 and Google Guice. We begin by explaining what DI is and teaching you about IoC containers. Then you’ll learn about object compositions and their role in DI. You’ll find out how to build a modular application and learn how to use DI to focus your efforts on the business logic unique to your application and let the framework handle the infrastructure work to put it all together. Moving on, you’ll gain knowledge of Java 9’s new features and modular framework and how DI works in Java 9. Next, we’ll explore Spring and Guice, the popular frameworks for DI. You’ll see how to define injection keys and configure them at the framework-specific level. After that, you’ll find out about the different types of scopes available in both popular frameworks. You’ll see how to manage dependency of cross-cutting concerns while writing applications through aspect-oriented programming. Towards the end, you’ll learn to integrate any third-party library in your DI-enabled application and explore common pitfalls and recommendations to build a solid application with the help of best practices, patterns, and anti-patterns in DI.

What you will learn

•Understand the benefits of DI and fo from a tightly coupled design to a cleaner design organized around dependencies

• See Java 9's new features and modular framework

•Set up Guice and Spring in an application so that it can be used for DI

•Write integration tests for DI applications

•Use scopes to handle complex application scenarios

•Integrate any third-party library in your DI-enabled application

•Implement Aspect-Oriented Programming to handle common cross-cutting concerns such as logging, authentication, and transactions

• Understand IoC patterns and anti-patterns in DI

What do you get with Print?

Instant access to your digital copy whilst your Print order is Shipped

Paperback book shipped to your preferred address

Redeem a companion digital copy on all Print orders

Access this title in our online reader with advanced features

DRM FREE - Read whenever, wherever and however you want

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Test-Driven Java Development, Second Edition

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Design Patterns and Best Practices in Java

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Total € 115.97

Darshak Patel Jul 03, 2018

The Book is good. I was not sure at first but then I loved it. It nicely covers dependency injection concept. Kudos to the writers.

Amazon Verified review

Seattle Sleuth Sep 16, 2018

This is a very good book, and I'll explain the 4 instead of 5 in a moment.The examples are clean and make sense. Spring and Guice examples are good.This is the best Java ioc/di book I've seen.The best ioc/di book overall that I have ever read is Mark Seemann's Dependency Injection in .NET (I have first and second editions) and this .Net book takes you thru ~why you would pick Ioc/Di via an example. He takes a crappy fake monolith application and teaches you how/why to change it to a good ioc/di pattern. So the Mark Seemann book is the gold standard imho.But this Java book is very good. I'd buy it again in a heartbeat.To the author of this book. Well done. I would suggest second edition include a "why" chapter with a small before and after example application. And a chapter about centralized ioc which mark seemann calls the composite-root pattern.This Java book is a keeper. If you're a Java developer, don't be Java @rrogant and read this book .. but also read the mark seemann book.

Chris Jul 31, 2024

Good information, but many of the code snippets contain errors (for example, missing spaces) and sometimes the text contains errors or doesn't make sense (like nobody did a serious proofreading prior to publishing).

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Java 9 Dependency Injection: Write loosely coupled code with Spring 5 and Guice

What do you get with Print?

Java 9 Dependency Injection

Dependency Injection in Java 9

Java 9 introduction

Key features

Modular Framework in Java 9

What is modularity?

Dependency Injection using the Java 9 Modular Framework

Modules with Service Loader

Summary

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