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/**
 * Copyright (C) 2010-2013 Alibaba Group Holding Limited
 * 
 * Licensed 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.
 */
package com.alibaba.rocketmq.client.consumer;

import com.alibaba.rocketmq.client.MQAdmin;
import com.alibaba.rocketmq.client.exception.MQBrokerException;
import com.alibaba.rocketmq.client.exception.MQClientException;
import com.alibaba.rocketmq.common.message.MessageExt;
import com.alibaba.rocketmq.common.message.MessageQueue;
import com.alibaba.rocketmq.remoting.exception.RemotingException;

import java.util.Set;


/**
 * Message queue consumer interface
 *
 * @author shijia.wxr
 * @since 2013-7-24
 */
public interface MQConsumer extends MQAdmin {
    /**
     * If consuming failure,message will be send back to the brokers,and delay consuming some time
     *
     * @param msg
     * @param delayLevel
     *
     * @throws InterruptedException
     * @throws MQBrokerException
     * @throws RemotingException
     * @throws MQClientException
     */
    @Deprecated
    void sendMessageBack(final MessageExt msg, final int delayLevel) throws RemotingException,
            MQBrokerException, InterruptedException, MQClientException;


    /**
     * If consuming failure,message will be send back to the broker,and delay consuming some time
     *
     * @param msg
     * @param delayLevel
     * @param brokerName
     *
     * @throws RemotingException
     * @throws MQBrokerException
     * @throws InterruptedException
     * @throws MQClientException
     */
    void sendMessageBack(final MessageExt msg, final int delayLevel, final String brokerName)
            throws RemotingException, MQBrokerException, InterruptedException, MQClientException;


    /**
     * Fetch message queues from consumer cache according to the topic
     *
     * @param topic
     *         message topic
     *
     * @return queue set
     *
     * @throws MQClientException
     */
    Set fetchSubscribeMessageQueues(final String topic) throws MQClientException;
}