Spring Data Redis Cache

In this tutorial, you'll learn about Fix Spring Data Redis Cache Not Working. We cover key concepts, practical examples, and best practices.

The Problem

@Cacheable methods always execute and results are never cached. Redis cache configuration requires proper setup.

Quick Fix

Configure Redis connection

Wrong:

// spring.redis.host not set

Output:

Connection refused

Right:

spring.redis.host=localhost
spring.redis.port=6379

Output:

Redis connected

Enable caching

Wrong:

@SpringBootApplication
public class App { }

Output:

@Cacheable ignored

Right:

@SpringBootApplication
@EnableCaching
public class App { }

Output:

Caching enabled

Configure cache manager

Wrong:

// No cache manager bean

Output:

Default cache manager used

Right:

@Bean
RedisCacheManager cacheManager(RedisConnectionFactory cf) {
    return RedisCacheManager.builder(cf).build();
}

Output:

Redis cache manager configured

Prevention

• Configure Redis connection properties
• Add @EnableCaching
• Configure RedisCacheManager bean

Common Mistakes with data redis cache

1. Using head and tail instead of pattern matching, causing runtime errors on empty lists
2. Forgetting that lazy evaluation defers computation until the value is forced, causing space leaks with unevaluated thunks
3. Using return to exit a function early instead of wrapping a pure value in the monad

These mistakes appear frequently in real-world SPRING code. DodaTech's contributors have identified these patterns through analysis of open-source projects and production systems.

Practice Exercise

Write a pure function that safely divides two integers using Maybe, then test it with edge cases like division by zero and negative numbers.

This exercise reinforces the concepts covered in this guide. Try implementing it before checking online solutions.

FAQ

This quick fix is part of the DodaTech Spring & JVM ecosystem series. Built by the developers of Doda Browser, DodaZIP, and Durga Antivirus Pro.