mqtt断线重连,配置修改重新创建连接07

b86676af · “liusq” · 1d4fc2b1 · b86676af
Commit b86676af authored Sep 09, 2024 by “liusq”
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Showing with 33 additions and 20 deletions

MqttSubscriber.cpp
+33 -20

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--- a/MqttSubscriber.cpp
+++ b/MqttSubscriber.cpp
 #include "MqttSubscriber.h"
 #include "mainwindow.h"
 #include "CameraHandle.h"
+#include "HttpService.h"  // 确保包含 HttpService 头文件
+#include <QTimer>
 MqttSubscriber* MqttSubscriber::instance = nullptr;
@@ -12,10 +14,20 @@ MqttSubscriber* MqttSubscriber::getInstance(QObject* parent) {
 }
 void MqttSubscriber::init(vides_data::MqttConfig &config, QString &httpUrl, QString &serialNumber) {
-    // 清理之前的客户端资源
+    // 如果客户端已存在，先断开连接再销毁
    if (client != nullptr) {
-        MQTTAsync_destroy(&client);  // 释放之前的MQTT客户端
+        if (MQTTAsync_isConnected(client)) {
-        client = nullptr;  // 确保指针清空
+            // 断开连接
+            MQTTAsync_disconnectOptions disc_opts = MQTTAsync_disconnectOptions_initializer;
+            int rc = MQTTAsync_disconnect(client, &disc_opts);
+            if (rc != MQTTASYNC_SUCCESS) {
+                qInfo() << "客户端断开连接失败，返回编码" << rc;
+            }
+        }
+        // 销毁现有的MQTT客户端
+        MQTTAsync_destroy(&client);
+        client = nullptr;  // 重置客户端指针
    }
    // 保存配置信息
@@ -23,13 +35,19 @@ void MqttSubscriber::init(vides_data::MqttConfig &config, QString &httpUrl, QStr
    this->httpUrl = httpUrl;
    this->serialNumber = serialNumber;
-    // 初始化MQTT客户端
+    // 初始化新的MQTT客户端
    QByteArray bAddress = config.address.toUtf8();
    char* cAddress = bAddress.data();
    QByteArray bClientId = config.clientId.toUtf8();
    char* cClientId = bClientId.data();
-    MQTTAsync_create(&client, cAddress, cClientId, MQTTCLIENT_PERSISTENCE_NONE, nullptr);
+    int rc = MQTTAsync_create(&client, cAddress, cClientId, MQTTCLIENT_PERSISTENCE_NONE, nullptr);
+    if (rc != MQTTASYNC_SUCCESS) {
+        qInfo() << "MQTT客户端创建失败，返回编码" << rc;
+        return;
+    }
+    // 设置回调函数
    MQTTAsync_setCallbacks(client, this, [](void* context, char* cause) {
        static_cast<MqttSubscriber*>(context)->connectionLost(cause);
    }, [](void* context, char* topicName, int topicLen, MQTTAsync_message* m) {
@@ -38,7 +56,7 @@ void MqttSubscriber::init(vides_data::MqttConfig &config, QString &httpUrl, QStr
 }
 MqttSubscriber::MqttSubscriber(QObject* parent)
-    : QObject(parent), retryTimer(new QTimer(this)) {
+    : QObject(parent), retryTimer(new QTimer(this)), client(nullptr) {
    // 连接信号和槽
    connect(this, &MqttSubscriber::connectionLostSignal, this, &MqttSubscriber::reconnectAndFetchConfig, Qt::QueuedConnection);
@@ -56,18 +74,10 @@ MqttSubscriber::~MqttSubscriber() {
 }
 void MqttSubscriber::start() {
-    // 确保每次开始连接前停止定时器
+    // 确保定时器停止
    retryTimer->stop();
-    // 如果客户端已经连接，应该先断开旧的连接
+    // 设置连接选项
-    if (client != nullptr) {
-        MQTTAsync_disconnectOptions disc_opts = MQTTAsync_disconnectOptions_initializer;
-        int rc = MQTTAsync_disconnect(client, &disc_opts);
-        if (rc != MQTTASYNC_SUCCESS) {
-            qInfo() << "旧连接断开失败，返回编码" << rc;
-        }
-    }
    MQTTAsync_connectOptions conn_opts = MQTTAsync_connectOptions_initializer;
    conn_opts.keepAliveInterval = 20;
    conn_opts.cleansession = 1;
@@ -88,12 +98,14 @@ void MqttSubscriber::start() {
    };
    conn_opts.context = this;
+    // 启动连接
    int rc;
    if ((rc = MQTTAsync_connect(client, &conn_opts)) != MQTTASYNC_SUCCESS) {
        qInfo() << "启动连接失败，返回编码" << rc;
    }
 }
 void MqttSubscriber::onConnect(MQTTAsync_successData* response) {
    retryTimer->stop();
    MQTTAsync_responseOptions opts = MQTTAsync_responseOptions_initializer;
@@ -128,17 +140,19 @@ void MqttSubscriber::reconnectAndFetchConfig() {
        re_config.mqttConfig.topic = topic;
        this->config = re_config.mqttConfig;
        this->init(re_config.mqttConfig, httpUrl, serialNumber);
-        start();
+        this->start();
    } else {
        qInfo() << "配置拉取失败，等待10秒后重试";
        instace.deleteObj(res);
-        retryTimer->start();  // 启动定时器，10秒后重试
+        QMetaObject::invokeMethod(retryTimer, "start", Qt::QueuedConnection);
    }
 }
 void MqttSubscriber::onConnectFailure(MQTTAsync_failureData* response) {
    qInfo() << "连接失败, rc" << (response ? response->code : -1);
-    retryTimer->start();
+    retryTimer->stop();  // 确保定时器在启动前被停止
+    // 确保定时器在主线程启动
+    QMetaObject::invokeMethod(retryTimer, "start", Qt::QueuedConnection);
 }
 void MqttSubscriber::onSubscribe(MQTTAsync_successData* response) {
@@ -240,4 +254,3 @@ void MqttSubscriber::onPublishSuccess(MQTTAsync_successData* response) {
 void MqttSubscriber::onPublishFailure(MQTTAsync_failureData* response) {
    qInfo() << "消息发布失败, rc" << (response ? response->code : -1);
 }