public async Task StartAsync(MqttServerOptions options)
{
_options = options ?? throw new ArgumentNullException(nameof(options));
if (_cancellationTokenSource != null)
{
throw new InvalidOperationException("The server is already started.");
}
_cancellationTokenSource = new CancellationTokenSource();
_retainedMessagesManager = new MqttRetainedMessagesManager(_options, _logger);
_clientSessionsManager = new MqttClientSessionsManager(_options, _retainedMessagesManager, _logger);
_clientSessionsManager.ApplicationMessageReceived += OnApplicationMessageReceived;
_clientSessionsManager.ClientConnected += OnClientConnected;
_clientSessionsManager.ClientDisconnected += OnClientDisconnected;
await _retainedMessagesManager.LoadMessagesAsync();
foreach (var adapter in _adapters)
{
adapter.ClientAccepted += OnClientAccepted;
await adapter.StartAsync(_options);
}
_logger.Info <MqttServer>("Started.");
Started?.Invoke(this, new MqttServerStartedEventArgs());
}
public async Task StopAsync()
{
try
{
if (_cancellationTokenSource == null)
{
return;
}
_cancellationTokenSource.Cancel(false);
_cancellationTokenSource.Dispose();
foreach (var adapter in _adapters)
{
adapter.ClientAccepted -= OnClientAccepted;
await adapter.StopAsync();
}
await _clientSessionsManager.StopAsync();
_logger.Info <MqttServer>("Stopped.");
}
finally
{
_cancellationTokenSource = null;
_retainedMessagesManager = null;
if (_clientSessionsManager != null)
{
_clientSessionsManager.ApplicationMessageReceived -= OnApplicationMessageReceived;
_clientSessionsManager.ClientConnected -= OnClientConnected;
_clientSessionsManager.ClientDisconnected -= OnClientDisconnected;
}
_clientSessionsManager = null;
}
}
public MqttClientSessionsManager(MqttServerOptions options, MqttRetainedMessagesManager retainedMessagesManager, IMqttNetLogger logger)
{
_logger = logger ?? throw new ArgumentNullException(nameof(logger));
_options = options ?? throw new ArgumentNullException(nameof(options));
_retainedMessagesManager = retainedMessagesManager ?? throw new ArgumentNullException(nameof(retainedMessagesManager));
}