Implementing a Write-Through Cache in Spring Boot with Redis and H2 Database

A comprehensive guide to implementing write-through caching in Spring Boot applications using Redis as the cache layer and H2 as the database. Covers the complete setup including dependencies, configuration, entity models, service layer with Spring Cache annotations (@Cacheable, @CachePut, @CacheEvict), and TTL configuration. Demonstrates how write-through caching maintains data consistency by simultaneously updating both cache and database, with practical examples and testing scenarios.