import { OnModuleInit } from '@nestjs/common';
import { DiscoveryService } from '@nestjs/core';
import { MetadataScanner } from '@nestjs/core/metadata-scanner';
import { TaskList } from 'graphile-worker';
import { MetadataAccessorService } from './metadata-accessor.service';
import { MiddlewareExplorerService } from './middleware-explorer.service';
import { MiddlewareService } from './middleware.service';
/**
 * This service is responsible to scan all [Task decorators](../decorators/task.decorators.ts) and register them.
 *
 * Heavily inspired from [`BullExplorer`](https://github.com/nestjs/bull/blob/c230eab1dc26fb743a3428e61043167866b1e377/lib/bull.explorer.ts)
 */
export declare class TaskExplorerService implements OnModuleInit {
    private readonly discoveryService;
    private readonly metadataAccessor;
    private readonly metadataScanner;
    private readonly middlewareExplorerService;
    private readonly middlewareService;
    private readonly logger;
    readonly taskList: TaskList;
    constructor(discoveryService: DiscoveryService, metadataAccessor: MetadataAccessorService, metadataScanner: MetadataScanner, middlewareExplorerService: MiddlewareExplorerService, middlewareService: MiddlewareService);
    onModuleInit(): void;
    explore(): void;
    /**
     * Returns the global and handler-specific middlewares applicable to a handler method
     */
    private getMiddlewares;
    /**
     * Logs task registration information with middleware details
     */
    private logTaskRegistration;
}