rabbit-mqtt +pmqtt协议+ paho库尝鲜 （ubuntu 16.04）

步骤

1 下载安装rabiit-mq mqtt-server
就用deb包
另需要
sudo apt-get install erlang

2 启动
sudo /etc/init.d/rabbitmq-server restart

3 mqtt-3.1协议支持
rabbitmq-plugins enable rabbitmq_mqtt

4 开启动web管理
rabbitmq-plugins enable rabbitmq_management

5 下载编译paho cpp

6 运行mqtt PUB/SUB的例子,用c++封装成hapoWapper, 结合protoc buf

编译:

g++ main.cpp -o -lpaho-mqtt3c --std=c++11

代码

用c++封装了下hapo的c调用库-hapoWapper.h

main.cpp

#include <iostream>#include <memory>#include "hapoWapper.h"using std::cout;using std::endl;using std::shared_ptr;#define ADDRESS     "127.0.0.1:1883"#define CLIENTID     "58daf13e258951000ab2b38f"#define TOPIC1        "Good man"#define TOPIC2        "Normal man"const char* TOKEN  =  "YBljNeKVdOVYPFJo7EjztFVoya94XV4GBuvB9U85KJY=";void fdelivered(void *context, MQTTClient_deliveryToken dt){    printf("Message with token value %d delivery confirmed\n", dt);}int fmsgarrvd(void *context, char *topicName, int topicLen, MQTTClient_message *message){    int i;    char* payloadptr;    printf("Message arrived\n");    printf("     topic: %s\n", topicName);    printf("   message: ");    if(!strcmp(topicName,TOPIC1)) {        printf("Got token size = %d, %s\n",message->payloadlen , (char*)message->payload);    payloadptr = (char*)message->payload;    for(i=0; i<message->payloadlen; i++)    {        putchar(*payloadptr++);    }    putchar('\n');    MQTTClient_freeMessage(&message);    MQTTClient_free(topicName);    return 1;}void fconnlost(void *context, char *cause){    printf("\nConnection lost\n");    printf("     cause: %s\n", cause);}int main(int argc, char* argv[]){    MQTTClient_connectOptions conn_opts = MQTTClient_connectOptions_initializer;    conn_opts.keepAliveInterval = 20;    conn_opts.cleansession = 1;    clientParams paras(ADDRESS,CLIENTID,conn_opts);    cbGroups cbs(fconnlost,fdelivered,fmsgarrvd);    pahoWapper wap(paras);    wap.connect(cbs);    printf("Subcribe topic:%s %s\n",TOPIC1,TOPIC2);    wap.subscribe(TOPIC2,1);    wap.subscribe(TOPIC1,1);    //printf("Publish with topic:%s\n",TOPIC2);    //auto words = "coooooooool";    //wap.publish(TOPIC2,words,strlen(words),1);    char ch;    do {        ch =getchar();    } while(ch !='Q' && ch != 'q');    return 0;}

hapoWapper.h

#ifndef HAPO_WAPPER_H#define HAPO_WAPPER_H#include "MQTTClient.h"#include <unistd.h>#include <stdlib.h>typedef void (*connlost)(void* ,char*);typedef void (*delivered)(void *context, MQTTClient_deliveryToken dt);typedef int (* msgarrvd)(void *context, char *topicName, int topicLen, MQTTClient_message *message);class clientParams {    public:        clientParams(){};        ~clientParams(){};        const char* _server_uri;         const char* _client_id;        MQTTClient_connectOptions _conn_opts;        clientParams(const char*a, const char* b, const MQTTClient_connectOptions & o):            _server_uri(a),_client_id(b),_conn_opts(o){};        clientParams & operator=(const clientParams & cp) {            if(&cp == this)                 return *this;            _server_uri = cp._server_uri;            _client_id = cp._client_id;            _conn_opts = cp._conn_opts;            return *this;        };};class cbGroups {    public:    connlost connect_cb;    delivered delivered_cb;    msgarrvd msgarrvd_cb;    cbGroups(connlost c, delivered d, msgarrvd m):        connect_cb(c),delivered_cb(d),msgarrvd_cb(m) {};};class pahoWapper {    public:        pahoWapper(){};        ~pahoWapper(){};        pahoWapper(const clientParams & paras) {            _paras = paras;            printf("client %s access %s\n",_paras._client_id, _paras._server_uri);            MQTTClient_create(&_client, _paras._server_uri, _paras._client_id,                MQTTCLIENT_PERSISTENCE_NONE, NULL);        };        int connect(const cbGroups & cbs) {            int rc;            MQTTClient_setCallbacks(_client, NULL, cbs.connect_cb, cbs.msgarrvd_cb, cbs.delivered_cb);            if ((rc = MQTTClient_connect(_client, &(_paras._conn_opts))) != MQTTCLIENT_SUCCESS) {                printf("Failed to connect, return code %d\n", rc);                exit(-1);            }            return rc;        };        void disconnect() {            MQTTClient_disconnect(_client, 10000);            MQTTClient_destroy(&_client);        };        void publish(const char* topic, const void* payload, int len , int qos_lvl) {            MQTTClient_message pubmsg = MQTTClient_message_initializer;            MQTTClient_deliveryToken token;            pubmsg.payload = (void*)payload;            pubmsg.payloadlen = len;            pubmsg.qos = qos_lvl;            pubmsg.retained = 0;            MQTTClient_publishMessage(_client, topic, &pubmsg, &token);            printf("Waiting for publication of %s\n" "on topic %s for client with ClientID: %s\n",                    (char*)payload, topic, _paras._client_id);        };        void subscribe(const char* topic,int qos_lvl) {            MQTTClient_subscribe(_client, topic, qos_lvl);        };    private:        MQTTClient _client;        clientParams _paras;};#endif