import { IncomingMessage, ServerResponse } from 'node:http';
import { Logger } from './logger';
export interface QueuedRequest {
    req: IncomingMessage;
    res: ServerResponse;
    origin: string;
    callback: () => void;
    timeoutHandle?: NodeJS.Timeout;
    queuedAt: number;
}
export interface RequestQueueOptions {
    maxQueueSize?: number;
    queueTimeout?: number;
}
export declare class RequestQueue {
    private queue;
    private maxQueueSize;
    private queueTimeout;
    private logger?;
    private totalQueued;
    constructor(logger?: Logger, options?: RequestQueueOptions);
    enqueue(origin: string, req: IncomingMessage, res: ServerResponse, callback: () => void): boolean;
    dequeue(origin: string): QueuedRequest | null;
    private removeRequest;
    getQueueDepth(origin?: string): number;
    clear(): void;
}
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