public void OnConnectionClosed(MqttClientConnection clientConnection)
{
// if client is connected
MqttClientConnection connectedClient;
if (clientConnection.IsConnected && MqttBroker.TryRemoveClientConnection(clientConnection.ClientId, out connectedClient))
{
// client has a will message
if (clientConnection.WillFlag)
{
// create the will PUBLISH message
MqttMsgPublish publish = new MqttMsgPublish(clientConnection.WillTopic, Encoding.UTF8.GetBytes(clientConnection.WillMessage), false, clientConnection.WillQosLevel, false);
// publish message through publisher manager
this.publishManager.Publish(publish);
}
// if not clean session
if (!clientConnection.CleanSession)
{
List <MqttSubscription> subscriptions = clientConnection.Subscriptions.Values.ToList();
if (subscriptions.Count > 0)
{
MqttSessionManager.SaveSession(clientConnection.ClientId, clientConnection.Session, subscriptions);
// TODO : persist client session if broker close
}
}
foreach (var topic in clientConnection.Subscriptions.Keys)
{
// delete client from runtime subscription
MqttSubscriberManager.Unsubscribe(topic, clientConnection);
}
// close the client
CloseClientConnection(clientConnection);
clientConnectionManager.ReturnConnection(clientConnection);
Interlocked.Decrement(ref numberOfConnectedClients);
}
}
