/// <summary>
/// Synchronously connect to the specific Mqtt Connection.
/// </summary>
/// <param name="hostname">The hostname hostnameto connect to.</param>
/// <param name="port">The port on the host to connect to.</param>
/// <param name="connectMessage">The connection message that should be used to initiate the connection.</param>
protected override ConnectionState InternalConnect(string hostname, int port, MqttConnectMessage connectMessage) {
int connectionAttempts = 0;
do {
// Initiate the connection
connectionState = ConnectionState.Connecting;
connection = MqttConnection.Connect(hostname, port);
this.RegisterForMessage(MqttMessageType.ConnectAck, ConnectAckProcessor);
connection.DataAvailable += connection_MessageDataAvailable;
// transmit the required connection message to the broker.
SendMessage(connectMessage);
// we're the sync connection handler so we need to wait for the brokers acknowlegement of the connections
if (!connectionResetEvent.WaitOne(5000, false)) {
// if we don't get a response in 5 seconds, dispose the connection and rebuild it.
connectionState = ConnectionState.Disconnecting;
connection.Dispose();
connectionState = ConnectionState.Disconnected;
}
} while (connectionState != ConnectionState.Connected && ++connectionAttempts < MaxConnectionAttempts);
// if we've failed to handshake with the broker, throw an exception.
if (connectionState != ConnectionState.Connected) {
throw new ConnectionException(
String.Format("The maximum allowed connection attempts ({0}) were exceeded. The broker " +
"is not responding to the connection request message (Missing Connection Acknowledgement)",
MaxConnectionAttempts),
connectionState);
}
return connectionState;
}
/// <summary>
/// Gets a configured connect message.
/// </summary>
/// <returns>An MqttConnectMessage that can be used to connect to a message broker.</returns>
private MqttConnectMessage GetConnectMessage(string username, string password)
{
var message = new MqttConnectMessage()
.WithClientIdentifier(clientIdentifier)
.KeepAliveFor(30)
.AuthenticateAs(username, password)
.StartClean();
return(message);
}
/// <summary>
/// Performs a synchronous connect to the message broker.
/// </summary>
public ConnectionState Connect()
{
MqttConnectMessage connectMessage = GetConnectMessage();
connectionHandler = new SynchronousMqttConnectionHandler();
// TODO: Get Get timeout from config or ctor or elsewhere.
keepAlive = new MqttConnectionKeepAlive(connectionHandler, 30);
subscriptionsManager = new SubscriptionsManager(connectionHandler);
messageLogger = new MessageLogger(connectionHandler);
publishingManager = new PublishingManager(connectionHandler, HandlePublishMessage);
return(connectionHandler.Connect(this.server, this.port, connectMessage));
}
public void BasicSerialization()
{
MqttConnectMessage msg = new MqttConnectMessage()
.WithClientIdentifier("mark")
.KeepAliveFor(30)
.StartClean();
Console.WriteLine(msg);
byte[] mb = MessageSerializationHelper.GetMessageBytes(msg);
Assert.Equal<byte>(0x10, mb[0]);
// VH will = 12, Msg = 6
Assert.Equal<byte>(18, mb[1]);
}
/// <summary>
/// Connect to the specific Mqtt Connection.
/// </summary>
/// <param name="server">The hostname to connect to.</param>
/// <param name="port">The port to connect to.</param>
/// <param name="message">The connect message to use as part of the connection process.</param>
public ConnectionState Connect(string server, int port, MqttConnectMessage message) {
try {
connectionState = InternalConnect(server, port, message);
} catch (ConnectionException) {
connectionState = ConnectionState.Faulted;
throw;
}
// if we managed to connection, ensure we catch any unexpected disconnects
if (connectionState == ConnectionState.Connected) {
this.connection.ConnectionDropped +=
(sender, e) => { this.connectionState = ConnectionState.Disconnected; };
}
return connectionState;
}
/// <summary>
/// Connect to the specific Mqtt Connection.
/// </summary>
/// <param name="server">The hostname to connect to.</param>
/// <param name="port">The port to connect to.</param>
/// <param name="message">The connect message to use as part of the connection process.</param>
public ConnectionState Connect(string server, int port, MqttConnectMessage message)
{
try {
connectionState = InternalConnect(server, port, message);
} catch (ConnectionException) {
connectionState = ConnectionState.Faulted;
throw;
}
// if we managed to connection, ensure we catch any unexpected disconnects
if (connectionState == ConnectionState.Connected)
{
this.connection.ConnectionDropped +=
(sender, e) => { this.connectionState = ConnectionState.Disconnected; };
}
return(connectionState);
}
/// <summary>
/// Synchronously connect to the specific Mqtt Connection.
/// </summary>
/// <param name="connection"></param>
protected override ConnectionState InternalConnect(string server, int port, MqttConnectMessage connectMessage)
{
int connectionAttempts = 0;
do
{
// Initiate the connection
connectionState = ConnectionState.Connecting;
connection = MqttConnection.Connect(server, port);
this.RegisterForMessage(MqttMessageType.ConnectAck, ConnectAckProcessor);
connection.DataAvailable += connection_MessageDataAvailable;
// transmit the required connection message to the broker.
SendMessage(connectMessage);
// we're the sync connection handler so we need to wait for the brokers acknowlegement of the connections
if (!connectionResetEvent.WaitOne(5000, false))
{
// if we don't get a response in 5 seconds, dispose the connection and rebuild it.
connectionState = ConnectionState.Disconnecting;
connection.Dispose();
connectionState = ConnectionState.Disconnected;
}
} while (connectionState != ConnectionState.Connected && ++connectionAttempts < MaxConnectionAttempts);
// if we've failed to handshake with the broker, throw an exception.
if (connectionState != ConnectionState.Connected)
{
throw new ConnectionException(
String.Format("The maximum allowed connection attempts ({0}) were exceeded. The broker " +
"is not responding to the connection request message (Missing Connection Acknowledgement)",
MaxConnectionAttempts),
connectionState);
}
return(connectionState);
}
public void WithWillSet()
{
MqttConnectMessage msg = new MqttConnectMessage()
.WithProtocolName("MQIsdp")
.WithProtocolVersion(3)
.WithClientIdentifier("mark")
.KeepAliveFor(30)
.StartClean()
.Will()
.WithWillQos(MqttQos.AtLeastOnce)
.WithWillRetain()
.WithWillTopic("willTopic")
.WithWillMessage("willMessage");
Console.WriteLine(msg);
byte[] mb = MessageSerializationHelper.GetMessageBytes(msg);
Assert.Equal<byte>(0x10, mb[0]);
// VH will = 12, Msg = 6
Assert.Equal<byte>(42, mb[1]);
}
/// <summary> /// Connect to the specific Mqtt Connection. /// </summary> /// <param name="server">The server to connect to.</param> /// <param name="port">The port to connect to.</param> /// <param name="message">The connect message to use as part of the connection process.</param> protected abstract ConnectionState InternalConnect(string server, int port, MqttConnectMessage message);
/// <summary> /// Connect to the specific Mqtt Connection. /// </summary> /// <param name="hostname">The hostname to connect to.</param> /// <param name="port">The port to connect to.</param> /// <param name="message">The connect message to use as part of the connection process.</param> protected abstract ConnectionState InternalConnect(string hostname, int port, MqttConnectMessage message);
/// <summary> /// Connect to the specific Mqtt Connection. /// </summary> /// <param name="server">The server to connect to.</param> /// <param name="port">The port to connect to.</param> /// <param name="message">The connect message to use as part of the connection process.</param> protected abstract ConnectionState InternalConnect(string server, int port, MqttConnectMessage message);
/// <summary> /// Connect to the specific Mqtt Connection. /// </summary> /// <param name="hostname">The hostname to connect to.</param> /// <param name="port">The port to connect to.</param> /// <param name="message">The connect message to use as part of the connection process.</param> protected abstract ConnectionState InternalConnect(string hostname, int port, MqttConnectMessage message);