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

The Spring bean life cycle and its phases


In a Spring application, the term life cycle applies to any class of application--Standalone Java, Spring Boot application, or Integration/System Test. Also, life cycle applies to all three dependency injection styles--XML, Annotations, and Java configuration. You define the configuration for beans as per business goals. But Spring creates these beans and manages the life cycle of the Spring beans. Spring loads the bean configurations either in Java or XML through ApplicationContext. After loading these beans, the Spring container handles the creation and instantiation of these beans as per your configuration. Let's divide the Spring application life cycle into three phases as follows:

  • The initialization phase
  • The Use phase
  • The destruction phase

Please refer to the following diagram:

As you can see in the preceding diagram, each Spring bean goes through these three phases in the complete life cycle. Each phase has some set of operations to be performed...