/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { ReceiveMessageRequest } from '../../proto/apache/rocketmq/v2/service_pb';
import { MessageView } from '../message';
import { MessageQueue } from '../route';
import { BaseClient, BaseClientOptions } from '../client';
import { FilterExpression } from './FilterExpression';
export interface ConsumerOptions extends BaseClientOptions {
    consumerGroup: string;
}
export declare abstract class Consumer extends BaseClient {
    protected readonly consumerGroup: string;
    constructor(options: ConsumerOptions);
    protected wrapReceiveMessageRequest(batchSize: number, mq: MessageQueue, filterExpression: FilterExpression, invisibleDuration: number, longPollingTimeout: number): ReceiveMessageRequest;
    protected receiveMessage(request: ReceiveMessageRequest, mq: MessageQueue, awaitDuration: number): Promise<MessageView[]>;
    protected ackMessage(messageView: MessageView): Promise<import("../../proto/apache/rocketmq/v2/service_pb").AckMessageResultEntry.AsObject[]>;
    protected invisibleDuration(messageView: MessageView, invisibleDuration: number): Promise<string>;
}