/// <summary>
/// Constructor of client and serializer
/// </summary>
/// <param name="InternalClientInfo"></param>
public MqttClient(ConnectConfig config)
{
_config = config;
//建立MqttClient物件
_client = new MqttFactory().CreateMqttClient() as MQTTnet.Client.MqttClient;
_client.Disconnected += MqttClient_Disconnected;
_mqttStatus = MqttBrokerConnectionStatus.DisConnected;
_mqttClientRunningThread = new Thread(new ThreadStart(mqttClientRunningProcess));
}
/// <summary>
/// Create new connection
/// </summary>
private void mqttClientRunningProcess()
{
_isRunningThread = true;
Task connectTask = null;
Task publishTask = null;
Task disConnectTask = null;
int maxPublishFailTimes = 15;
int maxReconnectTimes = 10;
int numOfReconnectTimes = 0;
int numOfPublishFailTimes = 0;
//MQTT Connection Options
var options = new MqttClientOptionsBuilder()
.WithClientId($"{Convert.ToBase64String(Guid.NewGuid().ToByteArray())}")
.WithTcpServer(_config.IpAddress.ToString(), _config.Port)
.WithCredentials(_config.UserName, _config.Password)
.WithKeepAlivePeriod(new TimeSpan(200000000))
.WithCommunicationTimeout(TimeSpan.FromSeconds(3000))
.WithCleanSession()
.WithProtocolVersion(MQTTnet.Serializer.MqttProtocolVersion.V311)
.Build();
MqttApplicationMessage[] publishingMessages = null;
while (_isRunningThread)
{
Thread.Sleep(0);
if (_client == null)
{
continue;
}
switch (_mqttStatus)
{
case MqttBrokerConnectionStatus.DisConnected:
#region DisConnected
if (numOfReconnectTimes++ > maxReconnectTimes)
{
numOfReconnectTimes = 0;
Thread.Sleep(10000);
}
// Create TCP based options using the builder.
_mqttStatus = MqttBrokerConnectionStatus.Connecting;
Console.WriteLine($"Start Connecting");
try
{
connectTask = _client.ConnectAsync(options);
connectTask.ConfigureAwait(false);
}
catch
{
_mqttStatus = MqttBrokerConnectionStatus.DisConnecting;
}
#endregion
break;
case MqttBrokerConnectionStatus.Connecting:
#region Connecting
switch (connectTask.Status)
{
//工作成功完成
case TaskStatus.RanToCompletion:
Console.WriteLine("Connected");
_mqttStatus = MqttBrokerConnectionStatus.Connected;
break;
//工作失敗
case TaskStatus.Faulted:
Console.WriteLine($"Connecting Fail.");
_mqttStatus = MqttBrokerConnectionStatus.DisConnecting;
break;
//工作取消
case TaskStatus.Canceled:
Console.WriteLine($"Connecting canceled");
_mqttStatus = MqttBrokerConnectionStatus.DisConnecting;
break;
}
break;
#endregion
//已經連線
case MqttBrokerConnectionStatus.Connected:
#region Connected
if (publishTask == null) //沒有 publishTask 在運行，發送新的Publish Task
{
if (!_client.IsConnected)
{
_mqttStatus = MqttBrokerConnectionStatus.DisConnecting;
continue;
}
if (_waitForPublishMessages.Any())
{
if (_waitForPublishMessages.Count() < 100)
{
publishingMessages = _waitForPublishMessages.ToArray();
}
else
{
publishingMessages = _waitForPublishMessages.Take(100).ToArray();
}
try
{
publishTask = _client.PublishAsync(publishingMessages);
}
catch (Exception ex)
{
Console.WriteLine($"Publishing Fail.");
_mqttStatus = MqttBrokerConnectionStatus.DisConnecting;
}
}
else
{
Thread.Sleep(1);
}
}
else
{
switch (publishTask.Status)
{
case TaskStatus.RanToCompletion:
MqttApplicationMessage deQueueMsg;
for (int index = 0; index < publishingMessages.Length; index++)
{
_waitForPublishMessages.TryDequeue(out deQueueMsg);
}
numOfPublishFailTimes = 0;
//清空工作
publishTask.Dispose();
publishTask = null;
break;
case TaskStatus.Faulted:
numOfPublishFailTimes++;
Console.WriteLine($"Publishing Fail.");
if (publishTask.Exception != null)
{
_mqttStatus = MqttBrokerConnectionStatus.DisConnecting;
}
//清空工作
publishTask = null;
if (numOfPublishFailTimes > maxPublishFailTimes)
{
numOfPublishFailTimes = 0;
_mqttStatus = MqttBrokerConnectionStatus.DisConnecting;
}
break;
case TaskStatus.Canceled:
numOfPublishFailTimes++;
//清空工作
publishTask = null;
if (numOfPublishFailTimes > maxPublishFailTimes)
{
numOfPublishFailTimes = 0;
_mqttStatus = MqttBrokerConnectionStatus.DisConnecting;
}
break;
}
}
break;
#endregion
case MqttBrokerConnectionStatus.DisConnecting:
if (disConnectTask == null)
{
Console.WriteLine($"DisConnecting.");
try
{
disConnectTask = _client.DisconnectAsync();
}
catch
{
Console.WriteLine($"DisConnected.");
disConnectTask = null;
_mqttStatus = MqttBrokerConnectionStatus.DisConnected;
}
}
else
{
if (disConnectTask.IsCompleted)
{
Console.WriteLine($"DisConnected.");
disConnectTask = null;
_mqttStatus = MqttBrokerConnectionStatus.DisConnected;
}
}
break;
}
}
}