import { IComponentContext, IInputSource, IRequireInitialization, MessageRef } from "@walmartlabs/cookie-cutter-core";
import { IQueueConfiguration } from "..";
import { IQueueReadOptions } from "../../utils";
export declare class QueueInputSource implements IInputSource, IRequireInitialization {
    private readonly client;
    private readonly deadLetterClient;
    private readonly readOptions;
    private readonly encoder;
    private metrics;
    private logger;
    private tracer;
    private running;
    private loop;
    private config;
    constructor(config: IQueueConfiguration & IQueueReadOptions);
    initialize(context: IComponentContext): Promise<void>;
    start(): AsyncIterableIterator<MessageRef>;
    stop(): Promise<void>;
    private loopQueueApproximateCount;
    private decode;
}