public async Task ExecuteAsync(string clientId, IPacket input, IMqttChannel <IPacket> channel)
{
if (input.Type != MqttPacketType.Disconnect)
{
return;
}
await Task.Run(() =>
{
Disconnect disconnect = input as Disconnect;
_tracer.Info(ServerProperties.DisconnectFlow_Disconnecting(clientId));
_willRepository.Delete(clientId);
ClientSession session = _sessionRepository.Read(clientId);
if (session == null)
{
throw new MqttException(ServerProperties.SessionRepository_ClientSessionNotFound(clientId));
}
if (session.Clean)
{
_sessionRepository.Delete(session.Id);
_tracer.Info(ServerProperties.Server_DeletedSessionOnDisconnect(clientId));
}
_connectionProvider.RemoveConnection(clientId);
});
}
public async Task ExecuteAsync(string clientId, IPacket input, IMqttChannel <IPacket> channel)
{
if (input.Type != MqttPacketType.Unsubscribe)
{
return;
}
Unsubscribe unsubscribe = input as Unsubscribe;
ClientSession session = _sessionRepository.Read(clientId);
if (session == null)
{
throw new MqttException(ServerProperties.SessionRepository_ClientSessionNotFound(clientId));
}
foreach (string topic in unsubscribe.Topics)
{
ClientSubscription subscription = session.GetSubscriptions().FirstOrDefault(s => s.TopicFilter == topic);
if (subscription != null)
{
session.RemoveSubscription(subscription);
}
}
_sessionRepository.Update(session);
await channel.SendAsync(new UnsubscribeAck( unsubscribe.PacketId ));
}
public async Task ExecuteAsync(string clientId, IPacket input, IMqttChannel <IPacket> channel)
{
if (input.Type != MqttPacketType.Subscribe)
{
return;
}
Subscribe subscribe = input as Subscribe;
ClientSession session = _sessionRepository.Read(clientId);
if (session == null)
{
throw new MqttException(ServerProperties.SessionRepository_ClientSessionNotFound(clientId));
}
List <SubscribeReturnCode> returnCodes = new List <SubscribeReturnCode>();
foreach (Subscription subscription in subscribe.Subscriptions)
{
try
{
if (!_topicEvaluator.IsValidTopicFilter(subscription.TopicFilter))
{
_tracer.Error(ServerProperties.ServerSubscribeFlow_InvalidTopicSubscription(subscription.TopicFilter, clientId));
returnCodes.Add(SubscribeReturnCode.Failure);
continue;
}
ClientSubscription clientSubscription = session
.GetSubscriptions()
.FirstOrDefault(s => s.TopicFilter == subscription.TopicFilter);
if (clientSubscription != null)
{
clientSubscription.MaximumQualityOfService = subscription.MaximumQualityOfService;
}
else
{
clientSubscription = new ClientSubscription
{
ClientId = clientId,
TopicFilter = subscription.TopicFilter,
MaximumQualityOfService = subscription.MaximumQualityOfService
};
session.AddSubscription(clientSubscription);
}
await SendRetainedMessagesAsync(clientSubscription, channel);
MqttQualityOfService supportedQos = _configuration.GetSupportedQos(subscription.MaximumQualityOfService);
SubscribeReturnCode returnCode = supportedQos.ToReturnCode();
returnCodes.Add(returnCode);
}
catch (RepositoryException repoEx)
{
_tracer.Error(repoEx, ServerProperties.ServerSubscribeFlow_ErrorOnSubscription(clientId, subscription.TopicFilter));
returnCodes.Add(SubscribeReturnCode.Failure);
}
}
_sessionRepository.Update(session);
await channel.SendAsync(new SubscribeAck( subscribe.PacketId, returnCodes.ToArray()));
}
