Introduction

• High-level Redis client for Java
  • @Cacheable still uses RedisTemplate, unless explicitly switch cache provider to Redisson:
    • redisson-spring-boot-starter to back @Cacheable
    • Add @EnableCaching at Redisson Config
• Use when multiple Springboot instance using same Redis (as shared brain)
• If Redis is engine, Redisson is the luxury control panel

Multiple Spring Boot instances
        |
     Redisson
        |
      Redis

Acquire distributed lock  ← Redisson
        |
    Critical section
        |
 Update data (Redis / DB) ← RedisTemplate / JPA
        |
Release lock              ← Redisson

Redis itself has NO:

• native locks
• Java objects
• coordination primitives

// just for data mutation

Redisson gives:

• Distributed locks
• Distributed collections
• Distributed semaphores
• Distributed counters
• Distributed maps
• All backed by Redis