import { CacheService } from './cache.service';
/**
 * Cache health check result
 */
export interface CacheHealthResult {
    status: 'healthy' | 'degraded' | 'unhealthy';
    layers: {
        cls: {
            available: boolean;
            latency?: number;
            error?: string;
        };
        memory: {
            available: boolean;
            latency?: number;
            size?: number;
            error?: string;
        };
        redis: {
            available: boolean;
            latency?: number;
            error?: string;
        };
    };
    timestamp: Date;
    overallLatency: number;
}
/**
 * Cache health checker
 *
 * Provides health monitoring for all cache layers
 */
export declare class CacheHealthChecker {
    private readonly cacheService;
    private readonly logger;
    constructor(cacheService: CacheService);
    /**
     * Check health of all cache layers
     */
    checkHealth(): Promise<CacheHealthResult>;
    /**
     * Get detailed cache statistics
     */
    getDetailedStats(): Promise<any>;
    /**
     * Check CLS cache health
     */
    private checkClsHealth;
    /**
     * Check Memory cache health
     */
    private checkMemoryHealth;
    /**
     * Check Redis cache health
     */
    private checkRedisHealth;
    /**
     * Generate recommendations based on health and stats
     */
    private generateRecommendations;
}