/// <summary>
/// Start broker
/// </summary>
public void Start()
{
this.commLayer.Start();
this.publisherManager.Start();
Console.WriteLine("Broker Started");
MqttCommon.LogMessageToFile("Broker Started");
}
void Client_MqttMsgSubscribeReceived(object sender, MqttMsgSubscribeEventArgs e)
{
MqttClient client = (MqttClient)sender;
//client.Subscribe(e.Topics, e.QoSLevels);
int i = 0;
//for (int i = 0; i < e.Topics.Length; i++)
//{
commBroker = new CommBroker();
commBroker.connect(e.Topics[i]);
if (!commBroker.connected)
{
throw new Exception("Unable to connect the broker for subscribing message");
}
commBroker.disable_heartbeat = true;
MqttCommon.LogMessageToFile("Subscribed to:" + e.Topics[i].Replace("/", ".").Replace("+", "*").ToString());
MqttCommon.LogMessageToFile("Topics Subscribed :" + e.Topics.Length.ToString());
Subscription subscription = commBroker.new_subscription(e.Topics[i].Replace("/", ".").Replace("+", "*"), string.Empty, (message, context) =>
{
client.Publish(message.subject.Replace(".", "/"), Convert.FromBase64String(message.data.ToString())); // System.Text.Encoding.UTF8.GetBytes(message.data.ToString()));
Console.WriteLine("Message Received");
MqttCommon.LogMessageToFile("Message Received");
Console.WriteLine("From Topic:" + message.subject.Replace(".", "/") + ". Data:" + message.data.ToString());
MqttCommon.LogMessageToFile("From Topic:" + message.subject.Replace(".", "/") + ". Data:" + message.data.ToString());
}, null, commBroker, string.Empty);
// TODO : business logic to grant QoS levels based on some conditions ?
// now the broker granted the QoS levels requested by client
// subscribe client for each topic and QoS level requested
//this.subscriberManager.Subscribe(e.Topics[i].Replace("/", ".").Replace("+", "*"), e.QoSLevels[i], client);
//}
try
{
// send SUBACK message to the client
client.Suback(e.MessageId, e.QoSLevels);
//for (int i = 0; i < e.Topics.Length; i++)
//{
// // publish retained message on the current subscription
// //this.publisherManager.PublishRetaind(e.Topics[i], client.ClientId);
//}
}
catch (MqttCommunicationException)
{
this.CloseClient(client);
}
}
void Client_MqttMsgPublishReceived(object sender, MqttMsgPublishEventArgs e)
{
try
{
Console.WriteLine("Message Published");
//DmMessage dmMessage = null;
string ipAddress;
commBroker = new CommBroker();
byte[] publishMessageByte;
MqttClient client = (MqttClient)sender;
ipAddress = client.RemoteEndPoint.ToString().Substring(8,
(client.RemoteEndPoint.ToString().IndexOf(']') - 8));
//publishMessageString = Convert.ToBase64String(e.Message) + ipAddress;
//publishMessageByte = Encoding.UTF8.GetBytes(publishMessageString); //Encoding.ASCII.GetBytes(publishMessageString);
DmMessage dmMessage = new DmMessage();
dmMessage.publicIpAddress = ipAddress;
dmMessage.data = Convert.ToBase64String(e.Message);
dmMessage.ToString();
var publishMessageString = Newtonsoft.Json.JsonConvert.SerializeObject(dmMessage);
publishMessageByte = Encoding.UTF8.GetBytes(publishMessageString.ToString());
CommMessage message = new CommMessage()
{
subject = e.Topic.Replace("/", "."),
data = publishMessageString,
data_length = publishMessageString.Length,
message_type = "string",
correlation_id = "",
reply_to = ""
};
// create PUBLISH message to publish
// [v3.1.1] DUP flag from an incoming PUBLISH message is not propagated to subscribers
// It should be set in the outgoing PUBLISH message based on transmission for each subscriber
//MqttMsgPublish publish = new MqttMsgPublish(e.Topic, publishMessageByte, false, e.QosLevel, e.Retain);
// publish message through publisher manager
//this.publisherManager.Publish(publish);
commBroker.connect(e.Topic);
MqttCommon.LogMessageToFile("Connected to RabbitMQ");
commBroker.publish(message, false);
MqttCommon.LogMessageToFile("Topic Name:" + message.subject.ToString());
MqttCommon.LogMessageToFile("Message Published:" + publishMessageString.ToString());
MqttCommon.LogMessageToFile("Message Published");
commBroker.disconnect();
}
catch (Exception ex) { MqttCommon.LogMessageToFile("Error:Message Publish - Failed"); }
}
/// <summary>
/// Stop broker
/// </summary>
public void Stop()
{
this.commLayer.Stop();
this.publisherManager.Stop();
// close connection with all clients
lock (clients)
{
foreach (MqttClient client in this.clients)
{
client.Close();
}
}
Console.WriteLine("Broker Stopped");
MqttCommon.LogMessageToFile("Broker Stopped");
}
void commLayer_ClientConnected(object sender, MqttClientConnectedEventArgs e)
{
// register event handlers from client
e.Client.MqttMsgDisconnected += Client_MqttMsgDisconnected;
e.Client.MqttMsgPublishReceived += Client_MqttMsgPublishReceived;
e.Client.MqttMsgConnected += Client_MqttMsgConnected;
e.Client.MqttMsgSubscribeReceived += Client_MqttMsgSubscribeReceived;
e.Client.MqttMsgUnsubscribeReceived += Client_MqttMsgUnsubscribeReceived;
e.Client.ConnectionClosed += Client_ConnectionClosed;
lock (clients)
{
// add client to the collection
this.clients.Add(e.Client);
}
// start client threads
e.Client.Open();
MqttCommon.LogMessageToFile("Broker - Client Connected");
}