Book Image

Spring 5 Design Patterns

By : Dinesh Rajput
Book Image

Spring 5 Design Patterns

By: Dinesh Rajput

Overview of this book

Design patterns help speed up the development process by offering well tested and proven solutions to common problems. These patterns coupled with the Spring framework offer tremendous improvements in the development process. The book begins with an overview of Spring Framework 5.0 and design patterns. You will understand the Dependency Injection pattern, which is the main principle behind the decoupling process that Spring performs, thus making it easier to manage your code. You will learn how GoF patterns can be used in Application Design. You will then learn to use Proxy patterns in Aspect Oriented Programming and remoting. Moving on, you will understand the JDBC template patterns and their use in abstracting database access. Then, you will be introduced to MVC patterns to build Reactive web applications. Finally, you will move on to more advanced topics such as Reactive streams and Concurrency. At the end of this book, you will be well equipped to develop efficient enterprise applications using Spring 5 with common design patterns
Table of Contents (20 chapters)
Title Page
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Dedication
Preface

Dependency injection pattern with Java-based configuration


As of Spring 3.0, it provides a Java-based Spring configuration to wire the Spring beans. Take a look at the following Java configuration class (AppConfig.java) to define the Spring bean and their dependencies. The Java-based configuration for dependency injection is a better choice, because it is more powerful and type-safe.

Creating a Java configuration class - AppConfig.java

Let's create an AppConfig.java configuration class for our example:

    package com.packt.patterninspring.chapter4.bankapp.config; 
    import org.springframework.context.annotation.Configuration; 
    @Configuration 
    public class AppConfig { 
         //.. 
    } 

The preceding AppConfig class is annotated with the @Configuration annotation, which indicates that it is a configuration class of the application that contains the details on bean definitions. This file will be loaded by the Spring application context to create beans for your application.

Let's...