Book Image

Building Microservices with Spring

By : Dinesh Rajput, Rajesh R V
Book Image

Building Microservices with Spring

By: Dinesh Rajput, Rajesh R V

Overview of this book

Getting Started with Spring Microservices begins with an overview of the Spring Framework 5.0, its design patterns, and its guidelines that enable you to implement responsive microservices at scale. You will learn how to use GoF patterns in application design. You will understand the dependency injection pattern, which is the main principle behind the decoupling process of the Spring Framework and makes it easier to manage your code. Then, you will learn how 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. After understanding the basics, you will move on to more advanced topics, such as reactive streams and concurrency. Written to the latest specifications of Spring that focuses on Reactive Programming, the Learning Path teaches you how to build modern, internet-scale Java applications in no time. Next, you will understand how Spring Boot is used to deploying serverless autonomous services by removing the need to have a heavyweight application server. You’ll also explore ways to deploy your microservices to Docker and managing them with Mesos. By the end of this Learning Path, you will have the clarity and confidence for implementing microservices using Spring Framework. This Learning Path includes content from the following Packt products: • Spring 5 Microservices by Rajesh R V • Spring 5 Design Patterns by Dinesh Rajput
Table of Contents (22 chapters)
Title Page
Copyright
About Packt
Contributors
Preface
Index

The dependency injection pattern


In any enterprise application, coordination between the working objects is very important for a business goal. The relationship between objects in an application represents the dependency of an object, so each object would get the job done with coordination of the dependent objects in the application. Such required dependencies between the objects tend to be complicated and with tight-coupled programming in the application. Spring provides a solution to the tight-coupling code of an application by using the dependency injection pattern. Dependency injection is a design pattern, which promotes the loosely coupled classes in the application. This means that the classes in the system depend on the behavior of others, and do not depend on instantiation of object of the classes. The dependency injection pattern also promotes programming to interface instead of programming to implementation. Object dependencies should be on an interface, and not on concrete classes...