rocketmq-client4cpp/src/producer/MessageQueueSelector.h

/**
* Copyright (C) 2013 kangliqiang ,kangliq@163.com
*
* 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.
*/

#ifndef __MESSAGEQUEUESELECTOR_H__
#define __MESSAGEQUEUESELECTOR_H__

#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <math.h>
#include <set>
#include <string>
#include <vector>

#include "MessageQueue.h"
#include "UtilAll.h"

namespace rmq
{
    class Message;

    class MessageQueueSelector
    {
    public:
        virtual ~MessageQueueSelector() {}
        virtual MessageQueue* select(std::vector<MessageQueue>& mqs, const Message& msg, void* arg) = 0;
    };

    class SelectMessageQueueByRandoom : public MessageQueueSelector
    {
    public:
        MessageQueue* select(std::vector<MessageQueue>& mqs, const Message& msg, void* arg)
        {
            srand((unsigned)time(NULL));
            int value = rand();
            value = value % mqs.size();
            return &(mqs.at(value));
        }
    };

    class SelectMessageQueueByHash : public MessageQueueSelector
    {
    public:
        MessageQueue* select(std::vector<MessageQueue>& mqs, const Message& msg, void* arg)
        {
			std::string* sArg = (std::string*)arg;
            int value = UtilAll::hashCode(sArg->c_str(), sArg->size());
            if (value < 0)
            {
                value = abs(value);
            }

            value = value % mqs.size();
            return &(mqs.at(value));
        }
    };


    class SelectMessageQueueByMachineRoom : public MessageQueueSelector
    {
    public:
        MessageQueue* select(std::vector<MessageQueue>& mqs, const Message& msg, void* arg)
        {
            // TODO Auto-generated method stub
            return NULL;
        }

        std::set<std::string> getConsumeridcs()
        {
            return m_consumeridcs;
        }

        void setConsumeridcs(const std::set<std::string>& consumeridcs)
        {
            m_consumeridcs = consumeridcs;
        }

    private:
        std::set<std::string> m_consumeridcs;
    };
}

#endif