/**
 * Internal constants for telemetry middleware
 * These constants are for internal use only
 */
/**
 * Metrics names as defined in metrics-dashboard.README.md
 */
export declare const INTERNAL_METRICS_NAMES: {
    readonly HTTP_REQUESTS_TOTAL: "http_requests_total";
    readonly HTTP_REQUEST_DURATION_SECONDS: "http_request_duration_seconds";
    readonly HTTP_REQUEST_MEMORY_USAGE_BYTES: "http_request_memory_usage_bytes";
    readonly HTTP_REQUEST_CPU_TIME_SECONDS: "http_request_cpu_time_seconds";
    readonly MEMORY_USAGE_PERCENT: "memory_usage_percent";
    readonly CPU_USAGE_PERCENT: "cpu_usage_percent";
    readonly DB_QUERY_DURATION_SECONDS: "db_query_duration_seconds";
    readonly DB_CONNECTION_POOL_USAGE_PERCENT: "db_connection_pool_usage_percent";
    readonly DB_MEMORY_USAGE_BYTES: "db_memory_usage_bytes";
};
/**
 * Metrics descriptions
 */
export declare const INTERNAL_METRICS_DESCRIPTIONS: {
    readonly http_requests_total: "Total number of HTTP requests";
    readonly http_request_duration_seconds: "HTTP request duration in seconds";
    readonly http_request_memory_usage_bytes: "Memory usage per HTTP request in bytes";
    readonly http_request_cpu_time_seconds: "CPU time per HTTP request in seconds";
    readonly memory_usage_percent: "System memory usage percentage";
    readonly cpu_usage_percent: "System CPU usage percentage";
};
/**
 * Registry keys for unified-route context storage
 */
export declare const INTERNAL_REGISTRY_KEYS: {
    readonly TELEMETRY_START_TIME: "telemetry:startTime";
    readonly TELEMETRY_START_MEMORY: "telemetry:startMemory";
    readonly TELEMETRY_START_CPU: "telemetry:startCpu";
    readonly TELEMETRY_SPAN: "telemetry:span";
    readonly TELEMETRY_LOGGER: "telemetry:logger";
    readonly TELEMETRY_TRACE_ID: "telemetry:traceId";
    readonly TELEMETRY_SPAN_ID: "telemetry:spanId";
    readonly TELEMETRY_REQUEST_ID: "telemetry:requestId";
    readonly TELEMETRY_ROUTE_INFO: "telemetry:routeInfo";
    readonly TELEMETRY_CURRENT_LOGGER: "telemetry:currentLogger";
};
/**
 * Default values for telemetry configuration
 */
export declare const INTERNAL_DEFAULTS: {
    readonly SPAN_NAME_PREFIX: "http";
    readonly OPERATION_NAME_PREFIX: "http_request";
    readonly DEFAULT_ROUTE: "unknown";
    readonly DEFAULT_METHOD: "unknown";
    readonly DEFAULT_STATUS_CODE: 0;
    readonly MEMORY_SAMPLE_INTERVAL_MS: 100;
    readonly CPU_SAMPLE_INTERVAL_MS: 100;
};
/**
 * Error messages for internal use
 */
export declare const INTERNAL_ERROR_MESSAGES: {
    readonly TELEMETRY_PROVIDER_NOT_FOUND: "Telemetry provider not found in registry";
    readonly SPAN_NOT_FOUND: "Telemetry span not found in registry";
    readonly LOGGER_NOT_FOUND: "Telemetry logger not found in registry";
    readonly INVALID_TRACE_HEADER: "Invalid trace header format";
    readonly RESOURCE_TRACKING_FAILED: "Resource tracking failed";
};