public void EnqueuePublishPacket(MqttPublishPacket publishPacket)
{
if (publishPacket == null)
{
throw new ArgumentNullException(nameof(publishPacket));
}
if (!_subscriptionsManager.IsSubscribed(publishPacket))
{
return;
}
_pendingMessagesQueue.Enqueue(publishPacket);
MqttNetTrace.Verbose(nameof(MqttClientSession), "Client '{0}': Enqueued pending publish packet.", ClientId);
}
public async Task ConnectAsync(MqttClientOptions options)
{
if (options == null)
{
throw new ArgumentNullException(nameof(options));
}
ThrowIfConnected("It is not allowed to connect with a server after the connection is established.");
try
{
_options = options;
_cancellationTokenSource = new CancellationTokenSource();
_latestPacketIdentifier = 0;
_packetDispatcher.Reset();
_adapter = _communicationChannelFactory.CreateMqttCommunicationAdapter(options);
MqttNetTrace.Verbose(nameof(MqttClient), "Trying to connect with server.");
await _adapter.ConnectAsync(_options.DefaultCommunicationTimeout).ConfigureAwait(false);
MqttNetTrace.Verbose(nameof(MqttClient), "Connection with server established.");
await SetupIncomingPacketProcessingAsync();
await AuthenticateAsync(options.WillMessage);
MqttNetTrace.Verbose(nameof(MqttClient), "MQTT connection with server established.");
if (_options.KeepAlivePeriod != TimeSpan.Zero)
{
StartSendKeepAliveMessages(_cancellationTokenSource.Token);
}
Connected?.Invoke(this, EventArgs.Empty);
}
catch (Exception)
{
await DisconnectInternalAsync().ConfigureAwait(false);
throw;
}
}
private GetOrCreateClientSessionResult GetOrCreateClientSession(MqttConnectPacket connectPacket)
{
lock (_clientSessions)
{
var isSessionPresent = _clientSessions.TryGetValue(connectPacket.ClientId, out var clientSession);
if (isSessionPresent)
{
if (connectPacket.CleanSession)
{
_clientSessions.Remove(connectPacket.ClientId);
clientSession.Dispose();
clientSession = null;
MqttNetTrace.Verbose(nameof(MqttClientSessionsManager), "Disposed existing session of client '{0}'.", connectPacket.ClientId);
}
else
{
MqttNetTrace.Verbose(nameof(MqttClientSessionsManager), "Reusing existing session of client '{0}'.", connectPacket.ClientId);
}
}
var isExistingSession = true;
if (clientSession == null)
{
isExistingSession = false;
clientSession = new MqttClientSession(connectPacket.ClientId, _options, this);
_clientSessions[connectPacket.ClientId] = clientSession;
MqttNetTrace.Verbose(nameof(MqttClientSessionsManager), "Created a new session for client '{0}'.", connectPacket.ClientId);
}
return(new GetOrCreateClientSessionResult {
IsExistingSession = isExistingSession, Session = clientSession
});
}
}