RabbitMQ c++

Windows RabbitMQ-c 消息处理流程

RabbitMQ-c Demo

项目需求：

多个app同时发送消息被多个app同时接收。生产者-消费者模式。
开发环境：

Windows 11

visual studio 2017

camke 3.27.0

Erlang 24.0

rabbitmq-server-3.9.7
Rabbit MQ的安装

RabbitMQ的安装需要依赖Erlang。安装之前，先安装Erlang。Erlang与Rabbit的版本不是所有的都匹配。所有安装的时候注意两者版本要匹配。查看版本匹配。

Erlang下载地址

RabbitMQ下载地址
配置设置

RabbitMQ安装完成后开启插件节点，运行下图的软件，设置节点。

输入开启节点的指令：rabbitmqctl start_app

开启RabbitMQ管理模块的插件，并配置到RabbitMQ节点上：rabbitmq-plugins enable rabbitmq_management

通过浏览器访问RabbitMQ web管理软件：localhost:15672

用户名：guest，密码：guest
RbbitMQ-c 库的编译

从github下载源码，用cmake生成.sln,再编译lib。

备注：将生成的库引入demo
编写Client demo

分为publish demo 和 consumer demo ，封装共同访问类CRabbitClient。

#pragma once#include #include #include #include #include using  RecvCallBack = std::function;class CRabbitmqClient{public:    CRabbitmqClient();    ~CRabbitmqClient();    /*    * 连接RabbitMQ Server    * @param [in] strExchange:交换器名称    * @param [in] strType：交换器类型 ，常见的如 fanout（广播） direct（点对点） topic（订阅）    * @param [in] isPassive：检测exchange是否存在。false：不存在会创建，true:不存在不会创建    * @param [in] isDurable：是否永久化。永久化：将队列信息写入磁盘，RabbitMQ Server重启后，队列不会丢失    * @param [in] isAutoDelete：当没有队列和交换器绑定时，交换器是否自动删除    * @param [in] internal: 设置是否内置的, true表示是内置的交换器, 客户端程序无法直接发送消息到这个交换器中, 只能通过交换器路由到交换器这个方式    * @returns 设置结果   */    int Connect(const std::string &strHostname, int iPort, const std::string &strUser, const std::string &strPasswd);    int Disconnect();    /*     * 声明交换器     * @param [in] strExchange:交换器名称     * @param [in] strType：交换器类型 ，常见的如 fanout（广播） direct（点对点） topic（订阅）     * @param [in] isPassive：检测exchange是否存在。false：不存在会创建，true:不存在不会创建     * @param [in] isDurable：是否永久化。永久化：将队列信息写入磁盘，RabbitMQ Server重启后，队列不会丢失     * @param [in] isAutoDelete：当没有队列和交换器绑定时，交换器是否自动删除     * @param [in] internal: 设置是否内置的, true表示是内置的交换器, 客户端程序无法直接发送消息到这个交换器中, 只能通过交换器路由到交换器这个方式     * @returns 声明结果    */    int ExchangeDeclare(const std::string &strExchange,const std::string& strType,bool isPassive =false,        bool isDurable =false,bool isAutoDelete = false,int internal =0);    /*    * 声明队列    * @param [in] strQueueName:队列名称    * @param [in] isPassive：检测exchange是否存在。false：不存在会创建，true:不存在不会创建    * @param [in] isDurable：是否永久化。永久化：将队列信息写入磁盘，RabbitMQ Server重启后，队列不会丢失    * @param [in] isExclusive：只有自己的用户对该队列可见    * @param [in] isAutoDelete：当没有队列和交换器绑定时，交换器是否自动删除    * @returns 声明结果   */    int QueueDelare(const std::string& strQueueName, bool isPassive = false,        bool isDurable = false, bool isExclusive =false, bool isAutoDelete = false );    /*    * 将队列绑定到交换器    * @param [in] strQueueName:队列名称    * @param [in] strExchange：交换器名称    * @param [in] strBindKey：路由键    * @returns 绑定结果    */    int QueueBind(const std::string &strQueueName, const std::string &strExchange, const std::string &strBindKey);    int QueueUnbind(const std::string &strQueueName, const std::string &strExchange, const std::string &strBindKey);    int QueueDelete(const std::string &strQueueName, int iIfUnused);    /*      * 发布消息      * @param [in] strMessage:需要发送的消息      * @param [in] strExchange：交换器名称      * @param [in] strBindKey：路由键      * @returns 发布结果      */    int Publish(const std::string &strMessage, const std::string &strExchange, const std::string &strRoutekey);    int Consumer(const std::string &strQueueName,  RecvCallBack func);private:    int ErrorMsg(amqp_rpc_reply_t x, char const *context);    void StartRecvThread();    void run();private:    std::string                 m_strHostname{"127.0.0.1"};      // amqp主机    int                         m_iPort{5672};            // amqp端口    std::string					m_strUser{"guest"};    std::string				    m_strPasswd{"guest"};    int                         m_iChannel=2;    amqp_socket_t               *m_pSock{ nullptr };    amqp_connection_state_t     m_pConn{ nullptr };    std::unique_ptr m_pRecvThread{ nullptr };    bool m_isRun{ false };    RecvCallBack m_recvFunc{ nullptr };};

#include "CRabbitmqClient.h"CRabbitmqClient::CRabbitmqClient(){}CRabbitmqClient::~CRabbitmqClient(){}int CRabbitmqClient::Connect(const std::string &strHostname, int iPort, const std::string &strUser, const std::string &strPasswd){    m_strHostname = strHostname;    m_iPort = iPort;    m_strUser = strUser;    m_strPasswd = strPasswd;    m_pConn = amqp_new_connection();    if (m_pConn == nullptr)    {        return -1;    }    m_pSock = amqp_tcp_socket_new(m_pConn);    if (m_pSock == nullptr)    {        return -2;    }    int status = amqp_socket_open(m_pSock, m_strHostname.c_str(), m_iPort);    if(status<0)    {        return -3;    }    if (0 != ErrorMsg(amqp_login(m_pConn, "guest", 0, 131072, 0, AMQP_SASL_METHOD_PLAIN, m_strUser.c_str(), m_strPasswd.c_str()), "Logging in")) {        return -4;    }    return 0;}int CRabbitmqClient::Disconnect(){    if (m_pConn != nullptr)    {        if (0 != ErrorMsg(amqp_connection_close(m_pConn, AMQP_REPLY_SUCCESS), "Closeing connectiong"))        {            return -1;        }        if (amqp_destroy_connection(m_pConn) < 0)        {            return -2;        }        m_pConn = nullptr;    }    return 0;}int CRabbitmqClient::ExchangeDeclare(const std::string &strExchange, const std::string& strType, bool isPassive,    bool isDurable , bool isAutoDelete, int internal ){    amqp_channel_open(m_pConn, m_iChannel);    if (0 != ErrorMsg(amqp_get_rpc_reply(m_pConn), "open channel")) {        amqp_channel_close(m_pConn, m_iChannel, AMQP_REPLY_SUCCESS);        return -1;    }    amqp_bytes_t exchange = amqp_cstring_bytes(strExchange.c_str());    amqp_bytes_t type = amqp_cstring_bytes(strType.c_str());    amqp_exchange_declare(m_pConn,m_iChannel,exchange,type, isPassive, isDurable, isAutoDelete, internal,amqp_empty_table);    if (0 != ErrorMsg(amqp_get_rpc_reply(m_pConn), "exchange_declare")) {        amqp_channel_close(m_pConn, m_iChannel, AMQP_REPLY_SUCCESS);        return -2;    }    amqp_channel_close(m_pConn, m_iChannel, AMQP_REPLY_SUCCESS);    return 0;}int CRabbitmqClient::QueueDelare(const std::string& strQueueName, bool isPassive ,bool isDurable , bool isExclusive, bool isAutoDelete ){    if (m_pConn == nullptr)    {        return -1;    }    amqp_channel_open(m_pConn, m_iChannel);    if (0 != ErrorMsg(amqp_get_rpc_reply(m_pConn), "open channel")) {        amqp_channel_close(m_pConn, m_iChannel, AMQP_REPLY_SUCCESS);        return -2;    }    amqp_bytes_t queue = amqp_cstring_bytes(strQueueName.c_str());    amqp_queue_declare(m_pConn, m_iChannel,queue, isPassive, isDurable, isExclusive, isAutoDelete, amqp_empty_table);    if (0 != ErrorMsg(amqp_get_rpc_reply(m_pConn), "queue_declare")) {        amqp_channel_close(m_pConn, m_iChannel, AMQP_REPLY_SUCCESS);        return -3;    }    amqp_channel_close(m_pConn, m_iChannel, AMQP_REPLY_SUCCESS);    return 0;}int CRabbitmqClient::QueueBind(const std::string &strQueueName, const std::string &strExchange, const std::string &strBindKey){    if (m_pConn == nullptr)    {        return -1;    }    amqp_channel_open(m_pConn, m_iChannel);    if (0 != ErrorMsg(amqp_get_rpc_reply(m_pConn), "open channel")) {        amqp_channel_close(m_pConn, m_iChannel, AMQP_REPLY_SUCCESS);        return -2;    }    amqp_bytes_t queue = amqp_cstring_bytes(strQueueName.c_str());    amqp_bytes_t exchange  = amqp_cstring_bytes(strExchange.c_str());    amqp_bytes_t routkey = amqp_cstring_bytes(strBindKey.c_str());    amqp_queue_bind(m_pConn, m_iChannel, queue, exchange, routkey, amqp_empty_table);    if (0 != ErrorMsg(amqp_get_rpc_reply(m_pConn), "queue_bind")) {        amqp_channel_close(m_pConn, m_iChannel, AMQP_REPLY_SUCCESS);        return -3;    }    amqp_channel_close(m_pConn, m_iChannel, AMQP_REPLY_SUCCESS);    return 0;}int CRabbitmqClient::QueueUnbind(const std::string &strQueueName, const std::string &strExchange, const std::string &strBindKey){    if (m_pConn == nullptr)    {        return -1;    }    amqp_channel_open(m_pConn, m_iChannel);    if (0 != ErrorMsg(amqp_get_rpc_reply(m_pConn), "open channel")) {        amqp_channel_close(m_pConn, m_iChannel, AMQP_REPLY_SUCCESS);        return -2;    }    amqp_bytes_t queue = amqp_cstring_bytes(strQueueName.c_str());    amqp_bytes_t exchange = amqp_cstring_bytes(strExchange.c_str());    amqp_bytes_t routkey = amqp_cstring_bytes(strBindKey.c_str());    amqp_queue_unbind(m_pConn, m_iChannel, queue, exchange, routkey, amqp_empty_table);    if (0 != ErrorMsg(amqp_get_rpc_reply(m_pConn), "queue_unbind")) {        amqp_channel_close(m_pConn, m_iChannel, AMQP_REPLY_SUCCESS);        return -3;    }    amqp_channel_close(m_pConn, m_iChannel, AMQP_REPLY_SUCCESS);    return 0;}int CRabbitmqClient::QueueDelete(const std::string &strQueueName, int iIfUnused){    if (m_pConn == nullptr)    {        return -1;    }    amqp_channel_open(m_pConn, m_iChannel);    if (0 != ErrorMsg(amqp_get_rpc_reply(m_pConn), "open channel")) {        amqp_channel_close(m_pConn, m_iChannel, AMQP_REPLY_SUCCESS);        return -2;    }    if(0!= ErrorMsg(amqp_get_rpc_reply(m_pConn), "delete queue")) {    amqp_channel_close(m_pConn, m_iChannel, AMQP_REPLY_SUCCESS);    return -3;    }    amqp_channel_close(m_pConn, m_iChannel, AMQP_REPLY_SUCCESS);    return 0;}int CRabbitmqClient::Publish(const std::string &strMessage, const std::string &strExchange, const std::string &strRoutekey){    if (m_pConn == nullptr)    {        return -1;    }    amqp_channel_open(m_pConn, m_iChannel);    if (0 != ErrorMsg(amqp_get_rpc_reply(m_pConn), "open channel")) {        amqp_channel_close(m_pConn, m_iChannel, AMQP_REPLY_SUCCESS);        return -2;    }    amqp_bytes_t message_bytes;    message_bytes.len = strMessage.length();    message_bytes.bytes = (void *)(strMessage.c_str());    amqp_bytes_t exchange = amqp_cstring_bytes(strExchange.c_str());    amqp_bytes_t routekey = amqp_cstring_bytes(strRoutekey.c_str());    //if (0 != amqp_basic_publish(m_pConn, m_iChannel, exchange, routekey, 0, 0, &props, message_bytes)) {    if (0 != amqp_basic_publish(m_pConn, m_iChannel, exchange, routekey, 0, 0, NULL, message_bytes)) {        fprintf(stderr, "publish amqp_basic_publish failed\n");        if (0 != ErrorMsg(amqp_get_rpc_reply(m_pConn), "amqp_basic_publish")) {            amqp_channel_close(m_pConn, m_iChannel, AMQP_REPLY_SUCCESS);            return -3;        }    }    amqp_channel_close(m_pConn, m_iChannel, AMQP_REPLY_SUCCESS);}int CRabbitmqClient::Consumer(const std::string &strQueueName, RecvCallBack func){    if (m_pConn == nullptr)    {        return -1;    }    if (m_recvFunc == nullptr)    {        m_recvFunc = func;    }    amqp_channel_open(m_pConn, m_iChannel);    if (0 != ErrorMsg(amqp_get_rpc_reply(m_pConn), "open channel")) {        amqp_channel_close(m_pConn, m_iChannel, AMQP_REPLY_SUCCESS);        return -2;    }    amqp_basic_qos(m_pConn, m_iChannel, 0, 1, 0);    int ack = 1; // no_ack    是否需要确认消息后再从队列中删除消息    amqp_bytes_t queuename = amqp_cstring_bytes(strQueueName.c_str());    amqp_basic_consume(m_pConn, m_iChannel, queuename, amqp_empty_bytes, 0, ack, 0, amqp_empty_table);    if (0 != ErrorMsg(amqp_get_rpc_reply(m_pConn), "Consuming")) {        amqp_channel_close(m_pConn, m_iChannel, AMQP_REPLY_SUCCESS);        return -3;    }    StartRecvThread();    return 0;}int CRabbitmqClient::ErrorMsg(amqp_rpc_reply_t x, char const *context) {    switch (x.reply_type) {    case AMQP_RESPONSE_NORMAL:        return 0;    case AMQP_RESPONSE_NONE:        fprintf(stderr, "%s: missing RPC reply type!\n", context);        break;    case AMQP_RESPONSE_LIBRARY_EXCEPTION:        fprintf(stderr, "%s: %s\n", context, amqp_error_string2(x.library_error));        break;    case AMQP_RESPONSE_SERVER_EXCEPTION:        switch (x.reply.id) {        case AMQP_CONNECTION_CLOSE_METHOD: {            amqp_connection_close_t *m = (amqp_connection_close_t *)x.reply.decoded;            fprintf(stderr, "%s: server connection error %uh, message: %.*s\n",                context, m->reply_code, (int)m->reply_text.len,                (char *)m->reply_text.bytes);            break;        }        case AMQP_CHANNEL_CLOSE_METHOD: {            amqp_channel_close_t *m = (amqp_channel_close_t *)x.reply.decoded;            fprintf(stderr, "%s: server channel error %uh, message: %.*s\n",                context, m->reply_code, (int)m->reply_text.len,                (char *)m->reply_text.bytes);            break;        }        default:            fprintf(stderr, "%s: unknown server error, method id 0x%08X\n",                context, x.reply.id);            break;        }        break;    }    return -1;}void CRabbitmqClient::StartRecvThread(){    if (m_pRecvThread == nullptr)    {        m_pRecvThread = std::make_unique(&CRabbitmqClient::run, this);        m_isRun = true;    }}void CRabbitmqClient::run(){    std::chrono::milliseconds interval{ 1000 };    amqp_rpc_reply_t res;    amqp_envelope_t envelope;    while (true)    {        amqp_maybe_release_buffers(m_pConn);        res = amqp_consume_message(m_pConn, &envelope, nullptr, 0);        if (AMQP_RESPONSE_NORMAL != res.reply_type)        {            fprintf(stderr, "Consumer amqp_channel_close failed\n");            amqp_channel_close(m_pConn, m_iChannel, AMQP_REPLY_SUCCESS);            break;        }        std::string str((char *)envelope.message.body.bytes, (char *)envelope.message.body.bytes + envelope.message.body.len);        if (m_recvFunc)        {            m_recvFunc(str);        }        amqp_destroy_envelope(&envelope);        std::this_thread::sleep_for(interval);    }    amqp_channel_close(m_pConn, 1, AMQP_REPLY_SUCCESS);    amqp_connection_close(m_pConn, AMQP_REPLY_SUCCESS);    amqp_destroy_connection(m_pConn);}

publish

// RabbitMQPublish.cpp : 此文件包含 "main" 函数。程序执行将在此处开始并结束。
//

#include 
#include "CRabbitmqClient.h"
int main()
{
    CRabbitmqClient objRabbitmq;

    std::string strIP = "127.0.0.1";
    int iPort = 5672;
    std::string strUser = "guest";
    std::string strPasswd = "guest";


    int iRet = objRabbitmq.Connect(strIP, iPort, strUser, strPasswd);
    printf("Rabbitmq Connect Ret: %d\n", iRet);


    std::string strExchange = "ExchangeTest1";
    std::string strRoutekey = "routekeyTest1";
    std::string strQueuename1 = "queueTest1";
    std::string strQueuename2 = "queueTest2";


    iRet = objRabbitmq.ExchangeDeclare(strExchange, "fanout");
    printf("Rabbitmq ExchangeDeclare Ret: %d\n", iRet);


    iRet = objRabbitmq.QueueDelare(strQueuename1);
    printf("Rabbitmq QueueDeclare1 Ret: %d\n", iRet);


    iRet = objRabbitmq.QueueDelare(strQueuename2);
    printf("Rabbitmq QueueDeclare2 Ret: %d\n", iRet);


    iRet = objRabbitmq.QueueBind(strQueuename1, strExchange, strRoutekey);
    printf("Rabbitmq QueueBind1 Ret: %d\n", iRet);


    iRet = objRabbitmq.QueueBind(strQueuename2, strExchange, strRoutekey);
    printf("Rabbitmq QueueBind2 Ret: %d\n", iRet);

    // Send Msg
    while (true)
    {
        std::string temp;
        std::cin >> temp;
        std::string strSendMsg = temp;
        iRet = objRabbitmq.Publish(strSendMsg, strExchange, strRoutekey);
        printf("Rabbitmq Publish 1 Ret: %d\n", iRet);
    }
    objRabbitmq.Disconnect();
    return 0;
}

consumer

// RabbitMQConsumer.cpp : 此文件包含 "main" 函数。程序执行将在此处开始并结束。
//

#include 
#include "CRabbitmqClient.h"
void RecvFunc(const std::string& message)
{
    std::cout << message<<std::endl;
}
int main()
{
    CRabbitmqClient objRabbitmq;

    std::string strIP = "127.0.0.1";
    int iPort = 5672;
    std::string strUser = "guest";
    std::string strPasswd = "guest";


    int iRet = objRabbitmq.Connect(strIP, iPort, strUser, strPasswd);
    printf("Rabbitmq Connect Ret: %d\n", iRet);


    std::string strExchange = "ExchangeTest1";
    std::string strRoutekey = "routekeyTest1";
    std::string strQueuename = "queueTest1";


    iRet = objRabbitmq.Consumer(strQueuename, RecvFunc);
    printf("Rabbitmq Consumer Ret: %d\n", iRet);
    std::chrono::milliseconds interval{ 1000 };
    while (true)
    {
        std::this_thread::sleep_for(interval);
    }
    return 0; 
}

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RabbitMQ c++

Windows RabbitMQ-c 消息处理流程

RabbitMQ-c Demo

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