import type { Db } from 'mongodb';
import type { IContainer } from 'node-cqrs';
import type { IViewLocker } from '../interfaces/index.ts';
import { AbstractMongoAccessor } from './AbstractMongoAccessor.ts';
import type { MongoProjectionDataParams } from './MongoProjectionDataParams.ts';
export type MongoViewLockerParams = MongoProjectionDataParams & {
    /**
     * (Optional) Time-to-live (TTL) duration (in milliseconds) for which a view remains locked.
     * The lock is automatically prolonged while still held by this instance.
     *
     * @default MongoViewLocker.DEFAULT_VIEW_LOCK_TTL
     */
    viewLockTtl?: number;
    /**
     * (Optional) MongoDB collection name used to store view locks.
     *
     * @default MongoViewLocker.DEFAULT_COLLECTION
     */
    viewLocksCollection?: string;
};
/**
 * MongoDB-backed implementation of IViewLocker.
 *
 * Uses a MongoDB document with token + lockedTill semantics to acquire a distributed view lock.
 * The lock is automatically prolonged at half the TTL interval to prevent expiration
 * while processing is in progress.
 *
 * Collection name: `ncqrs_view_locks`
 */
export declare class MongoViewLocker extends AbstractMongoAccessor implements IViewLocker {
    #private;
    static DEFAULT_VIEW_LOCK_TTL: number;
    static DEFAULT_COLLECTION: string;
    constructor(o: Partial<Pick<IContainer, 'viewModelMongoDb' | 'viewModelMongoDbFactory' | 'logger'>> & MongoViewLockerParams);
    protected initialize(db: Db): Promise<void>;
    get ready(): boolean;
    lock(): Promise<boolean>;
    private scheduleLockProlongation;
    private cancelLockProlongation;
    private prolongLock;
    unlock(): Promise<void>;
    once(event: 'ready'): Promise<void>;
}