public async Task StopAsync(MqttDisconnectReasonCode reason)
{
Status = MqttClientConnectionStatus.Finalizing;
_disconnectReason = reason;
if (reason == MqttDisconnectReasonCode.SessionTakenOver || reason == MqttDisconnectReasonCode.KeepAliveTimeout)
{
// Is is very important to send the DISCONNECT packet here BEFORE cancelling the
// token because the entire connection is closed (disposed) as soon as the cancellation
// token is cancelled. To there is no chance that the DISCONNECT packet will ever arrive
// at the client!
try
{
await _channelAdapter.SendPacketAsync(new MqttDisconnectPacket
{
ReasonCode = reason
}, _serverOptions.DefaultCommunicationTimeout, CancellationToken.None).ConfigureAwait(false);
}
catch (Exception exception)
{
_logger.Warning(exception, "Client '{0}': Error while sending DISCONNECT packet after takeover.", ClientId);
}
}
StopInternal();
await(_packageReceiverTask ?? PlatformAbstractionLayer.CompletedTask);
}
public MqttDisconnectPacket Create(MqttDisconnectReasonCode reasonCode)
{
if (reasonCode == MqttDisconnectReasonCode.NormalDisconnection)
{
return(_normalDisconnection);
}
return(new MqttDisconnectPacket
{
ReasonCode = reasonCode
});
}
public async Task StopAsync(MqttDisconnectReasonCode reason)
{
IsRunning = false;
if (reason == MqttDisconnectReasonCode.SessionTakenOver || reason == MqttDisconnectReasonCode.KeepAliveTimeout)
{
// Is is very important to send the DISCONNECT packet here BEFORE cancelling the
// token because the entire connection is closed (disposed) as soon as the cancellation
// token is cancelled. To there is no chance that the DISCONNECT packet will ever arrive
// at the client!
await TrySendDisconnectPacket(reason).ConfigureAwait(false);
}
StopInternal();
}
async Task TrySendDisconnectPacket(MqttDisconnectReasonCode reasonCode)
{
try
{
var disconnectPacket = _packetFactories.Disconnect.Create(reasonCode);
using (var timeout = new CancellationTokenSource(_serverOptions.DefaultCommunicationTimeout))
{
await SendPacketAsync(disconnectPacket, timeout.Token).ConfigureAwait(false);
}
}
catch (Exception exception)
{
_logger.Warning(exception, "Client '{0}': Error while sending DISCONNECT packet (ReasonCode = {1}).", Id, reasonCode);
}
}