/// <summary>
/// Opens the MQTT connection
/// </summary>
public async Task StartAsync()
{
try
{
lock (startupLock)
{
if (_managedMqttClient != null || ConnectionState == ConnectionState.Connected)
{
return;
}
ConnectionState = ConnectionState.Connecting;
_managedMqttClient = _mqttClientFactory.CreateManagedMqttClient();
_managedMqttClient.ApplicationMessageReceived += ManagedMqttClientApplicationMessageReceived;
_managedMqttClient.ApplicationMessageProcessed += ManagedMqttClientApplicationMessageProcessed;
_managedMqttClient.Connected += ManagedMqttClientConnected;
_managedMqttClient.Disconnected += ManagedMqttClientDisconnected;
}
await _managedMqttClient.StartAsync(_config.Options).ConfigureAwait(false);
}
catch (Exception e)
{
_logger.LogCritical($"Exception while setting up the mqttclient to {this}", e);
throw new MqttConnectionException($"Exception while setting up the mqttclient to {this}", e);
}
}
public async Task StartAsync()
{
if (disposedValue)
{
throw new InvalidOperationException("Client is disposed.");
}
await clientLock.WaitAsync();
try
{
var options = new ManagedMqttClientOptionsBuilder()
.WithAutoReconnectDelay(TimeSpan.FromSeconds(10))
.WithClientOptions(new MqttClientOptionsBuilder()
.WithClientId(Guid.NewGuid().ToString())
.WithTcpServer(Server, Port)
.WithCredentials(AccessToken)
.WithTls(new MqttClientOptionsBuilderTlsParameters {
UseTls = UseTls
})
.Build())
.Build();
client = factory.CreateManagedMqttClient();
await client.StartAsync(options);
}
finally
{
clientLock.Release();
}
}
public MqttClient(
MqttClientOptions config,
string topicName)
{
if (config == null)
{
throw new ArgumentNullException(nameof(config));
}
if (string.IsNullOrWhiteSpace(topicName))
{
throw new ArgumentException("Value cannot be empty.", nameof(topicName));
}
_config = config;
_topicName = topicName;
_mqttFactory = new MqttFactory();
_innerMqttClient = _mqttFactory.CreateManagedMqttClient();
}
private async Task StartMqtt(CancellationToken cancellationToken)
{
if (_cancellationTokenSource.IsCancellationRequested || cancellationToken.IsCancellationRequested)
{
return;
}
try
{
_managedMqttClient = _mqttClientFactory.CreateManagedMqttClient();
_managedMqttClient.ApplicationMessageReceived += ManagedMqttClientApplicationMessageReceived;
_managedMqttClient.Connected += ManagedMqttClientConnected;
_managedMqttClient.Disconnected += ManagedMqttClientDisconnected;
await _managedMqttClient.SubscribeAsync(_config.Topics).ConfigureAwait(false);
await _managedMqttClient.StartAsync(_config.Options).ConfigureAwait(false);
}
catch (Exception e)
{
_logger.LogCritical("Unhandled exception while settingup the mqttclient to {descriptor}", e);
throw new MqttListenerInitializationException("Unhandled exception while connectin to {descriptor}", e);
}
}
public IManagedMqttClient CreateManagedMqttClient()
{
return(_mqttClientFactory.CreateManagedMqttClient());
}