/**
 * Correlation context for tracking requests across services
 */
export interface CorrelationContext {
    correlationId: string;
    requestId?: string;
    userId?: string;
    sessionId?: string;
    traceId?: string;
    spanId?: string;
}
/**
 * Correlation manager for request tracking
 */
export declare class CorrelationManager {
    private static instance;
    private contexts;
    private constructor();
    /**
     * Gets singleton instance
     */
    static getInstance(): CorrelationManager;
    /**
     * Creates a new correlation context
     */
    createContext(options?: Partial<CorrelationContext>): CorrelationContext;
    /**
     * Gets correlation context by ID
     */
    getContext(correlationId: string): CorrelationContext | undefined;
    /**
     * Updates correlation context
     */
    updateContext(correlationId: string, updates: Partial<CorrelationContext>): void;
    /**
     * Removes correlation context
     */
    removeContext(correlationId: string): void;
    /**
     * Clears all contexts (useful for testing)
     */
    clear(): void;
    /**
     * Generates a unique correlation ID
     */
    private generateCorrelationId;
    /**
     * Gets the number of active contexts
     */
    getActiveContextCount(): number;
}
/**
 * Correlation utilities
 */
export declare class Correlation {
    /**
     * Runs a function with correlation context
     */
    static run<T>(context: CorrelationContext, callback: () => T): T;
    /**
     * Gets current correlation context
     */
    static getCurrentContext(): CorrelationContext | undefined;
    /**
     * Creates and runs with a new correlation context
     */
    static runWithNew<T>(options: Partial<CorrelationContext>, callback: () => T): T;
    /**
     * Generates a correlation ID from headers
     */
    static fromHeaders(headers: Record<string, string | string[] | undefined>): string;
    /**
     * Extracts trace information from various tracing systems
     */
    static extractTraceInfo(headers: Record<string, string | string[] | undefined>): Partial<CorrelationContext>;
    /**
     * Helper to get header value as string
     */
    private static getHeaderValue;
}
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