👀 Views: 395 💬 Answers: 1 📅 Created: 2025-08-25

spring-boot ehcache caching Java

I'm working on a project and hit a roadblock..... I tried several approaches but none seem to work... I'm working with issues with my caching mechanism using Ehcache in a Spring Boot application. I have a service that updates an entity, and I'm trying to ensure that the cache is updated only when the entity has changed. However, after updating the entity, the cache seems to retain stale data, which leads to inconsistent responses from my API. Here's the relevant part of my code: ```java @Service public class UserService { @Cacheable(value = "users", key = "#id") public User getUserById(Long id) { return userRepository.findById(id).orElse(null); } @CachePut(value = "users", key = "#user.id") public User updateUser(User user) { return userRepository.save(user); } } ``` I am using Spring Boot 2.6.0 with Ehcache 3.x. The scenario arises because, when I update a user, the cache does not seem to reflect the new values immediately, even though I expect it to do so. On inspecting the cache, it shows that the original values are retained, and I get inconsistent results when querying the same user both before and after the update. The update method is called successfully, and the user is saved as expected. However, when I try to get the user immediately after calling `updateUser`, it still returns the old user data. This is the behavior I see in logs indicating that the cache might have not been evicted: ``` Cache 'users' has not been updated for key '1'. Returning cached value. ``` I have also tried adding `@CacheEvict` to clear the cache before updating, but that didn't seem to help either. Here’s what I attempted: ```java @CacheEvict(value = "users", key = "#user.id") public User updateUser(User user) { return userRepository.save(user); } ``` This still didn’t solve the question, as I still observe the stale data. I’ve verified that the entity indeed changes between calls. Is there a better way to handle this caching scenario or any best practices I might have missed? Any insights would be greatly appreciated! My development environment is Windows. Any help would be greatly appreciated! For context: I'm using Java on Ubuntu. What am I doing wrong? I'm developing on Ubuntu 20.04 with Java. Is there a better approach?