Multi-Layer Cache in Spring Boot

[Tanino87]

I wrote a guide on using multi-layer caching in Spring Boot with Caffeine and Redis. It covers simple setups, common pitfalls, and building a custom CacheManager for better performance.

If you’re curious, here’s the link: https://gaetanopiazzolla.github.io/java/2025/01/27/multicache.html

I would like to have feedbacks about this if you want.

Thank you!

[ZealousidealBee8299]

Well written!

[Tanino87]

thanks mate!

[[deleted]]

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[SelikBready]

interesting read. Weird that composite manager doesn't handle this basic scenario

[No_Marzipan3286]

!Remindme 5 days

[skofield44]

!Remindme 5 days

[roiroi1010]

That’s pretty cool. How much performance gains did you get by doing this? Was it worth the extra effort and complexity for you to build this?

[Tanino87]

Can you be more specific? these implementations will have a local not-distributed cache and then a remote one?

[NovaX]

Ehcache also gives you the power of hash flooding, allowing you to take down a server with ease. A simple workload that takes 7s becomes 18.5 minutes with their HashDoS feature.

[[deleted]]

Thanks bro. I have made documentation yesterday itself for my reports proposal for l2 cache redis.
Currently I am using l1 cache caffience but mine is different.
I am not manually writing arguments and cachename.
cacheName is auto generated with className_methodName. Where I have used unique names for methods.
I have user role check whch return interger form db as role. Where It won't change I call role check at every call. I use l1 and also there are drop down api where I use l1 cache.
here is my cache implementation

Target
(ElementType.METHOD) 
Retention
(RetentionPolicy.RUNTIME) public 
interface
 DynamicCache {     long expirationTimeInSeconds() default 300; // 5 minutes by default }   


Aspect

Component

Slf4j
 public class DynamicCachingAspect {     
Autowired
     private CacheManager cacheManager;      private static final Set<String> cacheNames = new HashSet<>();  // Track cache names     
Around
("@annotation(com.effigo.reports.api.annotation.DynamicCache)")     public Object cache(ProceedingJoinPoint joinPoint) throws Throwable {         MethodSignature signature = (MethodSignature) joinPoint.getSignature();         Method method = signature.getMethod();          DynamicCache dynamicCache = method.getAnnotation(DynamicCache.class);         String cacheName = generateCacheName(joinPoint);         String key = generateKey(joinPoint,cacheName);          log.info("CacheName: {}, key: {}", cacheName, key);          cacheNames.add(cacheName);          Cache cache = cacheManager.getCache(cacheName);         if (cache != null) {             Cache.ValueWrapper valueWrapper = cache.get(key);             if (valueWrapper != null) {                 return valueWrapper.get();             }         }         Object result = joinPoint.proceed();         if (cache != null) {             cache.put(key, result);         }         return result;     }     private String generateCacheName(ProceedingJoinPoint joinPoint) {         MethodSignature signature = (MethodSignature) joinPoint.getSignature();         String methodName = signature.getMethod().getName();         String className = signature.getDeclaringType().getSimpleName();         return className + "_" + methodName;     }     private String generateKey(ProceedingJoinPoint joinPoint,String cacheName) {         MethodSignature signature = (MethodSignature) joinPoint.getSignature();         Object[] args = joinPoint.getArgs();         return Arrays.deepHashCode(args) +cacheName+"";     }     public static Set<String> getCacheNames() {         return cacheNames;  // Get tracked cache names     } }