import { Task } from './';
import { AwsCredentialConfig } from './clients/aws';
import { SNSClient } from './clients/sns';
import { SQSClient, SQSQueueConfig } from './clients/sqs';
import { Logger } from './logger';
export interface SQSTaskConfig {
    queueName: string;
    sqsConfig: SQSQueueConfig;
    awsCredentials: AwsCredentialConfig;
    baseRetryIntervalSec?: number;
    maxRetryIntervalSec?: number;
    log?: Logger;
    taskLog?: Logger;
}
export declare abstract class SQSConsumerTask implements Task {
    private config;
    private readonly sqsClient;
    private readonly log;
    constructor(config: SQSTaskConfig);
    execute(): Promise<boolean>;
    protected abstract handleMessage(message: Object): Promise<void>;
    protected getSqsClient(): SQSClient;
    subscribeToTopic(snsClient: SNSClient, topicName: string): Promise<string>;
    private backoff;
    isReady(): boolean;
}