Book Image

Spring Data

By : Petri Kainulainen
Book Image

Spring Data

By: Petri Kainulainen

Overview of this book

Spring Framework has always had a good support for different data access technologies. However, developers had to use technology-specific APIs, which often led to a situation where a lot of boilerplate code had to be written in order to implement even the simplest operations. Spring Data changed all this. Spring Data makes it easier to implement Spring-powered applications that use cloud-based storage services, NoSQL databases, map-reduce frameworks or relational databases. "Spring Data" is a practical guide that is full of step-by-step instructions and examples which ensure that you can start using the Java Persistence API and Redis in your applications without extra hassle. This book provides a brief introduction to the underlying data storage technologies, gives step-by-step instructions that will help you utilize the discussed technologies in your applications, and provides a solid foundation for expanding your knowledge beyond the concepts described in this book. You will learn an easier way to manage your entities and to create database queries with Spring Data JPA. This book also demonstrates how you can add custom functions to your repositories. You will also learn how to use the Redis key-value store as data storage and to use its other features for enhancing your applications. "Spring Data" includes all the practical instructions and examples that provide you with all the information you need to create JPA repositories with Spring Data JPA and to utilize the performance of Redis in your applications by using Spring Data Redis.
Table of Contents (13 chapters)

Configuring the Spring application context

We will use the Java configuration for configuring the application context of our application. The name of our application context configuration class is ApplicationContext, and its implementation is explained in the following points:

  1. The @Configuration annotation is used to identify the class as an application context configuration class.

  2. The @ComponentScan annotation is used to configure the base package of our controllers.

  3. The @EnableWebMvc annotation is used to enable the Spring MVC.

  4. The values of the configuration parameters are fetched from a property file that is imported by using the @PropertySource annotation. The Environment interface is used to access the property values stored in this file.

  5. The redisConnectionFactory() method is used to configure the Redis connection factory bean. The implementation of this method depends on the used Redis connector.

The source code of our application context configuration skeleton class is given as follows...