import { Command } from 'commander';
import { ApplicationService } from '../../application/services/application.service';
import { QueueService } from '../../application/services/queue.service';
/**
 * Start Command
 * Starts the engraving job worker using event-driven blocking reads
 */
export declare class StartCommand {
    private applicationService;
    private queueService;
    private running;
    private blockingPollTimeoutSeconds;
    constructor(applicationService: ApplicationService, queueService: QueueService, blockingPollTimeoutSeconds: number);
    /**
     * Creates and configures the start command
     */
    static create(): Command;
    /**
     * Executes the start command
     */
    execute(): Promise<void>;
    /**
     * Main processing loop using simple polling
     */
    private processLoop;
    /**
     * Process a single engraving job message
     */
    private processMessage;
    /**
     * Sets up graceful shutdown handlers
     */
    private setupGracefulShutdown;
    /**
     * Sleep utility
     */
    private sleep;
}
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