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Cache Eviction Strategies

Sumit Rawal answered on May 14, 2023 Popularity 2/10 Helpfulness 1/10

answer Cache Eviction Strategies

Cache Eviction Strategies

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To keep the cache up to date, we need to evict or remove entries when the underlying data changes. We can use the @CacheEvict annotation to achieve this.

Update the UserService class to add methods for creating and updating users:

@Service
public class UserService {
    private final UserRepository userRepository;
    public UserService(UserRepository userRepository) {
        this.userRepository = userRepository;
    }
    @Cacheable(value = "users", key = "#id")
    public User findById(Long id) {
        return userRepository.findById(id).orElseThrow(() -> new IllegalArgumentException("User not found"));
    }
    @CacheEvict(value = "users", key = "#user.id")
    public User save(User user) {
        return userRepository.save(user);
    }
    @CacheEvict(value = "users", key = "#user.id")
    public User update(User user) {
        findById(user.getId()); // Ensure the user exists
        return userRepository.save(user);
    }
    @CacheEvict(value = "users", allEntries = true)
    public void deleteById(Long id) {
        userRepository.deleteById(id);
    }
}

Popularity 2/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: java

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Contributed on May 14 2023

Sumit Rawal

0 Answers Avg Quality 2/10

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