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修改了开启Mqtt和关闭Mqtt时的事件

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This commit is contained in:
David P.G
2025-07-15 17:13:27 +08:00
parent e3730eccb4
commit cd4b249bf9
4 changed files with 228 additions and 103 deletions
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13
Models/Mqtt.cs
View File

@@ -8,6 +8,8 @@ namespace PMSWPF.Models;
/// </summary>
public partial class Mqtt : ObservableObject
{
public event Action<Mqtt> OnMqttIsActiveChanged;
/// <summary>
/// MQTT客户端ID。
/// </summary>
@@ -34,6 +36,17 @@ public partial class Mqtt : ObservableObject
[ObservableProperty]
private bool _isActive;
partial void OnIsActiveChanged(bool value)
{
OnMqttIsActiveChanged?.Invoke(this);
}
/// <summary>
/// 显示连接的消息：
/// </summary>
[ObservableProperty]
private string connectMessage;
/// <summary>
/// 是否设置为默认MQTT客户端。
/// </summary>

194
Services/MqttBackgroundService.cs
View File

@@ -6,6 +6,8 @@ using System.Threading.Tasks;
using Microsoft.Extensions.Hosting;
using MQTTnet;
using MQTTnet.Client;
using MQTTnet.Client.Connecting;
using MQTTnet.Client.Disconnecting;
using MQTTnet.Client.Options;
using PMSWPF.Models;
using PMSWPF.Services;
@@ -28,6 +30,9 @@ namespace PMSWPF.Services
// 存储MQTT配置的字典，键为MQTT配置ID，值为Mqtt模型对象。
private readonly Dictionary<int, Mqtt> _mqttConfigDic;
// 存储每个客户端重连尝试次数的字典
private readonly Dictionary<int, int> _reconnectAttempts;
// 定时器，用于周期性地执行数据发布任务。
private Timer _timer;
@@ -45,6 +50,7 @@ namespace PMSWPF.Services
_dataServices = dataServices;
_mqttClients = new Dictionary<int, IMqttClient>();
_mqttConfigDic = new Dictionary<int, Mqtt>();
_reconnectAttempts = new Dictionary<int, int>();
}
/// <summary>
@@ -61,23 +67,23 @@ namespace PMSWPF.Services
_serviceMainThread.IsBackground = true;
_serviceMainThread.Name = "MqttServiceMainThread";
_serviceMainThread.Start();
}
private void Execute()
{
while (!_stopEvent.WaitOne(0))
{
if (_dataServices.Mqtts==null || _dataServices.Mqtts.Count==0)
if (_dataServices.Mqtts == null || _dataServices.Mqtts.Count == 0)
{
_reloadEvent.Reset();
continue;
}
_reloadEvent.WaitOne();
// 初始加载MQTT配置和变量数据。
LoadMqttConfigurations();
ConnectMqttClient();
ConnectMqttList();
_reloadEvent.Reset();
}
@@ -95,24 +101,32 @@ namespace PMSWPF.Services
// 取消订阅事件。
_dataServices.OnMqttListChanged -= HandleMqttListChanged;
// 断开所有已连接的MQTT客户端。
foreach (var mqttId in _mqttClients.Keys.ToList())
{
var client=_mqttClients[mqttId];
var mqtt=_mqttConfigDic[mqttId];
mqtt.IsConnected = false;
if (client.IsConnected)
{
client.DisconnectAsync().GetAwaiter().GetResult();
}
}
DisconnecetAll();
// 清空所有字典。
_mqttClients.Clear();
_mqttConfigDic.Clear();
_reconnectAttempts.Clear();
NlogHelper.Info("Mqtt后台服务已停止。"); // 记录服务停止信息
}
private void DisconnecetAll()
{
// 断开所有已连接的MQTT客户端。
foreach (var mqttId in _mqttClients.Keys.ToList())
{
var client = _mqttClients[mqttId];
var mqtt = _mqttConfigDic[mqttId];
mqtt.IsConnected = false;
if (client.IsConnected)
{
client.DisconnectAsync()
.GetAwaiter()
.GetResult();
}
}
}
/// <summary>
/// 加载并连接MQTT配置。
@@ -121,28 +135,88 @@ namespace PMSWPF.Services
private void LoadMqttConfigurations()
{
NlogHelper.Info("开始加载Mqtt配置文件...");
_mqttConfigDic.Clear();
// 从数据服务获取所有MQTT配置。
var _mqttConfigList = _dataServices.Mqtts.Where(m => m.IsActive)
.ToList();
foreach (var mqtt in _mqttConfigList)
{
mqtt.OnMqttIsActiveChanged += OnMqttIsActiveChangedHandler;
_mqttConfigDic[mqtt.Id] = mqtt;
mqtt.ConnectMessage = "配置加载成功.";
}
NlogHelper.Info($"Mqtt配置文件加载成功，开启的Mqtt客户端：{_mqttConfigList.Count}个。");
}
private async void OnMqttIsActiveChangedHandler(Mqtt mqtt)
{
try
{
if (mqtt.IsActive)
{
await ConnectMqtt(mqtt);
}
else
{
if (!_mqttClients.TryGetValue(mqtt.Id,out var client))
{
NlogHelper.Warn($"没有在Mqtt连接字典中找到名字为：{mqtt.Name}的连接。");
return;
}
if (client.IsConnected)
{
await client.DisconnectAsync();
}
mqtt.IsConnected = false;
mqtt.ConnectMessage = "断开连接.";
_mqttClients.Remove(mqtt.Id);
NlogHelper.Info($"{mqtt.Name}的客户端，与服务器断开连接.");
}
}
catch (Exception e)
{
NotificationHelper.ShowError($"{mqtt.Name}客户端，开启或关闭的过程中发生了错误:{e.Message}",e);
}
}
/// <summary>
/// 连接到指定的MQTT代理。
/// </summary>
/// <param name="mqtt">MQTT配置对象。</param>
/// <returns>表示异步操作的任务。</returns>
private void ConnectMqttClient()
private async Task ConnectMqttList()
{
foreach (Mqtt mqtt in _mqttConfigDic.Values.ToList())
{
try
{
if (_mqttClients.TryGetValue(mqtt.Id, out var mclient) && mclient.IsConnected)
{
NlogHelper.Info($"{mqtt.Name}的Mqtt服务器连接已存在。");
mqtt.ConnectMessage = "连接成功.";
mqtt.IsConnected = true;
continue;
}
await ConnectMqtt(mqtt);
}
catch (Exception ex)
{
NotificationHelper.ShowError($"连接MQTT服务器失败: {mqtt.Name} - {ex.Message}", ex);
}
}
}
private async Task ConnectMqtt(Mqtt mqtt)
{
NlogHelper.Info($"开始连接：{mqtt.Name}的服务器...");
mqtt.ConnectMessage = "开始连接服务器...";
// 创建MQTT客户端工厂和客户端实例。
var factory = new MqttFactory();
var client = factory.CreateMqttClient();
@@ -155,62 +229,92 @@ namespace PMSWPF.Services
.Build();
// 设置连接成功事件处理程序。
client.UseConnectedHandler(async e =>
{
NotificationHelper.ShowSuccess($"已连接到MQTT服务器: {mqtt.Name}");
mqtt.IsConnected = true;
// 订阅主题
await client.SubscribeAsync(new MqttTopicFilterBuilder().WithTopic(mqtt.SubTopic).Build());
NlogHelper.Info($"MQTT客户端 {mqtt.Name} 已订阅主题: {mqtt.SubTopic}");
});
client.UseConnectedHandler(async (e) => { await HandleConnected(e, client, mqtt); });
// 设置接收消息处理程序
client.UseApplicationMessageReceivedHandler(e =>
client.UseApplicationMessageReceivedHandler(e => { HandleMessageReceived(e, mqtt); });
// 设置断开连接事件处理程序。
client.UseDisconnectedHandler(async (e) => await HandleDisconnected(e,options, client, mqtt));
// 尝试连接到MQTT代理。
await client.ConnectAsync(options, CancellationToken.None);
// 将连接成功的客户端添加到字典。
_mqttClients[mqtt.Id] = client;
}
private static void HandleMessageReceived(MqttApplicationMessageReceivedEventArgs e, Mqtt mqtt)
{
var topic = e.ApplicationMessage.Topic;
var payload = System.Text.Encoding.UTF8.GetString(e.ApplicationMessage.Payload);
NlogHelper.Info($"MQTT客户端 {mqtt.Name} 收到消息: 主题={topic}, 消息={payload}");
// 在这里添加处理消息的逻辑
});
}
// 设置断开连接事件处理程序。
client.UseDisconnectedHandler(async e =>
private async Task HandleDisconnected(MqttClientDisconnectedEventArgs args, IMqttClientOptions options,
IMqttClient client,
Mqtt mqtt)
{
NotificationHelper.ShowWarn($"与MQTT服务器断开连接: {mqtt.Name}");
mqtt.ConnectMessage = "断开连接.";
mqtt.IsConnected = false;
// 服务停止
if (_stopEvent.WaitOne(0))
return;
if (!mqtt.IsActive)
if (_stopEvent.WaitOne(0) || !mqtt.IsActive)
return;
NlogHelper.Info($"5秒后重新连接Mqtt服务器：{mqtt.Name}");
// 尝试重新连接。
await Task.Delay(TimeSpan.FromSeconds(5)); // 等待5秒后重连
// 增加重连尝试次数
if (!_reconnectAttempts.ContainsKey(mqtt.Id))
{
_reconnectAttempts[mqtt.Id] = 0;
}
_reconnectAttempts[mqtt.Id]++;
// 指数退避策略
var maxDelay = TimeSpan.FromMinutes(5); // 最大延迟5分钟
var baseDelay = TimeSpan.FromSeconds(5); // 基础延迟5秒
var delay = TimeSpan.FromSeconds(baseDelay.TotalSeconds *
Math.Pow(2, _reconnectAttempts[mqtt.Id] - 1));
if (delay > maxDelay)
{
delay = maxDelay;
}
NlogHelper.Info(
$"与MQTT服务器：{mqtt.Name} 的连接已断开。将在 {delay.TotalSeconds} 秒后尝试第 {_reconnectAttempts[mqtt.Id]} 次重新连接...");
mqtt.ConnectMessage = $"连接已断开。将在 {delay.TotalSeconds} 秒后尝试第 {_reconnectAttempts[mqtt.Id]} 次重新连接...";
await Task.Delay(delay);
try
{
mqtt.ConnectMessage = $"开始重新连接服务器...";
await client.ConnectAsync(options, CancellationToken.None);
}
catch (Exception ex)
{
mqtt.ConnectMessage = $"重新与Mqtt服务器连接失败.";
NlogHelper.Error($"重新与Mqtt服务器连接失败: {mqtt.Name}", ex);
}
});
}
// 尝试连接到MQTT代理。
client.ConnectAsync(options, CancellationToken.None)
.GetAwaiter()
.GetResult();
// 将连接成功的客户端添加到字典。
_mqttClients[mqtt.Id] = client;
}
catch (Exception ex)
private async Task HandleConnected(MqttClientConnectedEventArgs args, IMqttClient client, Mqtt mqtt)
{
NotificationHelper.ShowError($"连接MQTT服务器失败: {mqtt.Name} - {ex.Message}", ex);
}
// 重置重连尝试次数
if (_reconnectAttempts.ContainsKey(mqtt.Id))
{
_reconnectAttempts[mqtt.Id] = 0;
}
NotificationHelper.ShowSuccess($"已连接到MQTT服务器: {mqtt.Name}");
mqtt.IsConnected = true;
mqtt.ConnectMessage = "连接成功.";
// 订阅主题
await client.SubscribeAsync(new MqttTopicFilterBuilder().WithTopic(mqtt.SubTopic)
.Build());
NlogHelper.Info($"MQTT客户端 {mqtt.Name} 已订阅主题: {mqtt.SubTopic}");
}

50
ViewModels/MqttsViewModel.cs
View File

@@ -19,33 +19,33 @@ public partial class MqttsViewModel : ViewModelBase
private readonly MqttRepository _mqttRepository;
private readonly ILogger<MqttsViewModel> _logger;
private readonly NavgatorServices _navgatorServices;
[ObservableProperty]
private ObservableCollection<Mqtt> _mqtts;
public ObservableCollection<Mqtt> Mqtts
{
get => _mqtts;
set
{
if (_mqtts != null)
{
foreach (var mqtt in _mqtts)
{
mqtt.PropertyChanged -= Mqtt_PropertyChanged;
}
}
SetProperty(ref _mqtts, value);
if (_mqtts != null)
{
foreach (var mqtt in _mqtts)
{
mqtt.PropertyChanged += Mqtt_PropertyChanged;
}
}
}
}
// public ObservableCollection<Mqtt> Mqtts
// {
// get => _mqtts;
// set
// {
// if (_mqtts != null)
// {
// foreach (var mqtt in _mqtts)
// {
// mqtt.PropertyChanged -= Mqtt_PropertyChanged;
// }
// }
//
// SetProperty(ref _mqtts, value);
//
// if (_mqtts != null)
// {
// foreach (var mqtt in _mqtts)
// {
// mqtt.PropertyChanged += Mqtt_PropertyChanged;
// }
// }
// }
// }
[ObservableProperty]
private Mqtt _selectedMqtt;

8
Views/MqttsView.xaml
View File

@@ -136,6 +136,14 @@
FontSize="14" />
<TextBlock Text="{Binding ConnTime}" />
</StackPanel>
<StackPanel Orientation="Horizontal"
Margin="0,2">
<ui:FontIcon Icon="{x:Static ui:SegoeFluentIcons.Message}"
VerticalAlignment="Center"
Margin="0,0,8,0"
FontSize="14" />
<TextBlock Text="{Binding ConnectMessage}" />
</StackPanel>
<StackPanel Orientation="Horizontal"
Margin="0,2">
<ui:FontIcon Icon="{x:Static ui:SegoeFluentIcons.FavoriteStar}"