AGV/projects/monitor/emqx-client/paho_client.cpp

//
// Created by zx on 23-2-22.
//

#include "paho_client.h"


Paho_client::Paho_client(std::string clientid){
  clientid_=clientid;
  context_= nullptr;
}
Paho_client::~Paho_client(){}
void Paho_client::set_maxbuf(int size)
{
  create_opts_.maxBufferedMessages=size+256;
}
bool Paho_client::connect(std::string address,int port){
  char connstr[255]={0};
  sprintf(connstr,"mqtt://%s:%d",address.c_str(),port);
  int rc;

  if ((rc=MQTTAsync_createWithOptions(&client_,connstr,clientid_.c_str(),MQTTCLIENT_PERSISTENCE_NONE,NULL,&create_opts_)
          != MQTTASYNC_SUCCESS))
  {
    printf("Failed to create client object, return code %d\n", rc);
    return false;
  }

  if ((rc = MQTTAsync_setCallbacks(client_, this, connlost, messageArrived, NULL)) != MQTTASYNC_SUCCESS)
  {
    printf("Failed to set callback, return code %d\n", rc);
    return false;
  }

  conn_opts_.keepAliveInterval = 20;
  conn_opts_.cleansession = 1;
  conn_opts_.onSuccess = onConnect;
  conn_opts_.onFailure = onConnectFailure;
  conn_opts_.context = this;

  if ((rc = MQTTAsync_connect(client_, &conn_opts_)) == MQTTASYNC_SUCCESS)
  {
    printf("Connected success \n");
  }

  address_=address;
  port_=port;
  return true;
}
bool Paho_client::disconnect(){
  return true;
}
void Paho_client::publish(const std::string& topic,int QOS,const MqttMsg& msg){
  if(connected_==false)
  {
    printf(" pls connect before publish\n");
    return;
  }
  pub_opts_.onSuccess = onSend;
  pub_opts_.onFailure = onSendFailure;
  pub_opts_.context = client_;

  pubmsg_.payload = msg.data();
  pubmsg_.payloadlen = msg.length();
  pubmsg_.qos = QOS;
  pubmsg_.retained = 0;
  int rc=-1;
  if ((rc = MQTTAsync_sendMessage(client_, topic.c_str(), &pubmsg_, &pub_opts_)) != MQTTASYNC_SUCCESS)
  {
    printf("Failed to start sendMessage, return code %d\n", rc);

  }

}
void Paho_client::subcribe(std::string topic,int QOS,ArrivedCallback callback,void* context){
  arrivedCallback_=callback;
  context_=context;
  MQTTAsync_responseOptions opts = MQTTAsync_responseOptions_initializer;
  printf("Subscribing to topic %s\nfor client %s using QoS%d\n\n"
         "\n", topic.c_str(), clientid_.c_str(), QOS);
  opts.onSuccess = onSubscribe;
  opts.onFailure = onSubscribeFailure;
  opts.context = this;
  int rc=-1;

  if ((rc = MQTTAsync_subscribe(client_, topic.c_str(), QOS, &opts)) != MQTTASYNC_SUCCESS)
  {
    printf("Failed to start subscribe, return code %d\n", rc);
    return;
  }

}

int Paho_client::messageArrived(void* context, char* topicName, int topicLen, MQTTAsync_message* message)
{
  Paho_client* cl=(Paho_client*)context;
  MqttMsg msg((char*)message->payload,message->payloadlen);
  if(cl->arrivedCallback_!= nullptr)
    cl->arrivedCallback_(topicName,message->qos,msg,cl->context_);
  MQTTAsync_freeMessage(&message);
  MQTTAsync_free(topicName);
}


void Paho_client::connlost(void *context, char *cause)
{
  Paho_client* cl=(Paho_client*)context;
  MQTTAsync client = cl->client_;
  MQTTAsync_connectOptions conn_opts = cl->conn_opts_;
  int rc;

  printf("\nConnection lost\n");
  printf("     cause: %s\n", cause);

  printf("Reconnecting\n");
  conn_opts.keepAliveInterval = 20;
  conn_opts.cleansession = 1;
  cl->connected_=false;
  if ((rc = MQTTAsync_connect(client, &conn_opts)) == MQTTASYNC_SUCCESS)
  {
    printf(" Reconnected success\n");
    cl->connected_=true;
  }
}


void Paho_client::onConnectFailure(void* context, MQTTAsync_failureData* response)
{
  Paho_client* cl=(Paho_client*)context;
  printf("clientid:%s,Connect failed, rc %d\n", cl->clientid_.c_str(),response ? response->code : 0);

  int rc=-1;
  if ((rc = MQTTAsync_connect(cl->client_, &(cl->conn_opts_))) == MQTTASYNC_SUCCESS)
  {
    printf(" Reconnected success\n");
  }

}

void Paho_client::onSubscribe(void* context, MQTTAsync_successData* response)
{
  Paho_client* cl=(Paho_client*)context;
  printf("clientid:%s  Subscribe succeeded\n",cl->clientid_.c_str());

}

void Paho_client::onSubscribeFailure(void* context, MQTTAsync_failureData* response)
{
  Paho_client* cl=(Paho_client*)context;
  printf("clientid:%s Subscribe failed, rc %d\n",cl->clientid_.c_str(), response->code);
}


void Paho_client::onConnect(void* context, MQTTAsync_successData* response)
{
  Paho_client* cl=(Paho_client*)context;
  cl->connected_=true;
}


void Paho_client::onSendFailure(void* context, MQTTAsync_failureData* response)
{
  MQTTAsync client = (MQTTAsync)context;
  MQTTAsync_disconnectOptions opts = MQTTAsync_disconnectOptions_initializer;
  int rc;

  printf("Message send failed token %d error code %d\n", response->token, response->code);
  opts.onSuccess = onDisconnect;
  opts.onFailure = onDisconnectFailure;
  opts.context = client;
  if ((rc = MQTTAsync_disconnect(client, &opts)) != MQTTASYNC_SUCCESS)
  {
    printf("Failed to start disconnect, return code %d\n", rc);
  }
}

void Paho_client::onSend(void* context, MQTTAsync_successData* response)
{
  // This gets called when a message is acknowledged successfully.
}
void Paho_client::onDisconnectFailure(void* context, MQTTAsync_failureData* response)
{
  printf("Disconnect failed\n");
}

void Paho_client::onDisconnect(void* context, MQTTAsync_successData* response)
{
  printf("Successful disconnection\n");
}