NUHMAN.com

📦 Java Code:

java

package com.example.cache;

import org.springframework.boot.CommandLineRunner;
import org.springframework.cache.CacheManager;
import org.springframework.context.ApplicationContext;
import org.springframework.stereotype.Component;

@Component
public class CacheProviderDetector implements CommandLineRunner {

    private final ApplicationContext context;

    public CacheProviderDetector(ApplicationContext context) {
        this.context = context;
    }

    @Override
    public void run(String... args) {
        // Check if a CacheManager bean is defined
        if (context.containsBean("cacheManager")) {
            CacheManager cacheManager = context.getBean(CacheManager.class);
            String className = cacheManager.getClass().getName();

            System.out.println("✅ Detected CacheManager: " + className);
            detectProviderFromClass(className);
        } else {
            System.out.println("⚠️ No CacheManager bean defined in context.");
        }
    }

    private void detectProviderFromClass(String className) {
        String provider;

        if (className.contains("JCache")) {
            provider = "JCache (JSR-107) – e.g., EhCache 3, Hazelcast, Infinispan";
        } else if (className.contains("Hazelcast")) {
            provider = "Hazelcast";
        } else if (className.contains("Infinispan")) {
            provider = "Infinispan";
        } else if (className.contains("Couchbase")) {
            provider = "Couchbase";
        } else if (className.contains("Redis")) {
            provider = "Redis";
        } else if (className.contains("Caffeine")) {
            provider = "Caffeine";
        } else if (className.contains("Cache2k")) {
            provider = "Cache2k";
        } else if (className.contains("ConcurrentMap")) {
            provider = "Simple (ConcurrentMap-based default)";
        } else {
            provider = "Unknown (Custom or unrecognized provider)";
        }

        System.out.println("🔍 Cache Provider Detected: " + provider);
    }
}

✅ What this does:

• Runs automatically on application startup.
• Checks if a CacheManager is defined in the Spring context.
• Extracts the class name of the actual CacheManager bean.
• Logs a human-readable cache provider type based on known class name patterns.

📝 Usage:

• Add this class to any Spring Boot project with caching enabled.
• It helps understand what caching provider is auto-configured, which is useful for debugging or learning Spring Boot’s caching behavior.