/**
 * In-flight request tracker for debugging stuck requests.
 *
 * Tracks active requests and logs warnings when requests exceed thresholds.
 * Helps identify when the event loop is blocked or requests are hanging.
 */
import type { RequestProfileRecord } from "../../observability/index.js";
interface TrackedRequest {
    requestId: string;
    projectSlug: string | undefined;
    path: string;
    method: string;
    startTime: number;
    env?: string;
    releaseId?: string;
    productionRuntime: boolean;
    slowTimer?: ReturnType<typeof setTimeout>;
    verySlowTimer?: ReturnType<typeof setTimeout>;
}
declare class RequestTracker {
    private inFlight;
    private statusInterval;
    private totalRequests;
    private totalCompleted;
    private totalTimedOut;
    private startStatusLogging;
    private stopStatusLogging;
    start(requestId: string, projectSlug: string | undefined, path: string, method: string, env?: string, releaseId?: string, productionRuntime?: boolean): void;
    complete(requestId: string, statusCode: number, timedOut?: boolean, profile?: RequestProfileRecord | null): void;
    markLongLived(requestId: string): void;
    getInFlightCount(): number;
    getInFlightRequests(): TrackedRequest[];
    getStats(): {
        inFlight: number;
        total: number;
        completed: number;
        timedOut: number;
    };
    waitForDrain(timeoutMs: number, pollIntervalMs?: number): Promise<boolean>;
    shutdown(): void;
}
export declare const requestTracker: RequestTracker;
export {};
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