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

Dependency injection pattern with XML-based configuration


Spring provides dependency injection with XML-based configuration from the very beginning. It is the primary way of configuring a Spring application. According to me, every developer should have an understanding of how to use XML with a Spring application. In this section, I am going to explain the same example as discussed in the previous section of Java-based configuration with reference to XML-based configuration.

 

Creating an XML configuration file

In the section on Java-based configuration, we had created an AppConfig class annotated with the @Configuration annotation. Similarly, for XML-based configuration, we will now create an applicationContext.xml file rooted with a <beans> element. The following simplest possible example shows the basic structure of XML-based configuration metadata:

Following is the applicationContext.xml file:

    <?xml version="1.0" encoding="UTF-8"?> 
    <beans xmlns="http://www.springframework...