livelessons-data-redis

Lesson 4: Working With Data (Redis)

Introduction

This example shows how you can use Redis with Spring Boot.

Prerequisites

You need a local or remote Redis server to store data. If you are using a remote server edit the application.properties files.

Building and running the sample

Use the following commands to build run the application:

$ mvn clean package
$ java -jar target/livelessons-redis-1.0.0-SNAPSHOT.jar

Understanding the code

The Demo class shows how you can use RedisTemplate to access data and how Redis can be used with Spring’s caching system.

The operations() method show how you can work with low level Redis operations. This example increments a value by 1, 2, 3 then 6.

The javaTypes() method shows how you can map Redis structures to Java types. Notice how when we recreate the map we don’t get an empty structure, the previously inserted values are immediately available.

The caching() method shows how a slow service call can be cached in Redis. The RedisCacheManager is configured in the main DataRedisApplication. The first method call is slow, but subsequent calls are fast because they are loaded from Redis. Note as well that the same UID is returned (indicating that SlowService.execute() is not called more than once).