RabbitMQ c++

Windows RabbitMQ-c 消息处理流程

RabbitMQ-c Demo

1. 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。

2. 开发环境：

   Windows 11

   visual studio 2017

   camke 3.27.0

   Erlang 24.0

   rabbitmq-server-3.9.7

3. 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

4. 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

   

   

5. 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

6. 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<
    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; 
}