/// <summary>
/// Handles the publish complete, for messages that are undergoing Qos ExactlyOnce processing.
/// </summary>
/// <param name="msg">The MSG.</param>
/// <returns>Boolean value indicating whether the message was successfull processed.</returns>
private bool HandlePublishRelease(MqttMessage msg)
{
MqttPublishReleaseMessage pubRelMsg = (MqttPublishReleaseMessage)msg;
bool publishSuccess = false;
MqttPublishMessage pubMsg;
receivedMessages.TryGetValue(pubRelMsg.VariableHeader.MessageIdentifier, out pubMsg);
if (pubMsg != null)
{
receivedMessages.Remove(pubRelMsg.VariableHeader.MessageIdentifier);
// send the message for processing to whoever is waiting.
publishSuccess = publishMessageCallback(pubMsg);
MqttPublishCompleteMessage compMsg = new MqttPublishCompleteMessage()
.WithMessageIdentifier(pubMsg.VariableHeader.MessageIdentifier);
connectionHandler.SendMessage(compMsg);
}
else
{
// TODO: if we receive a publish release but haven't seen the original publish message, what do we do?!
}
return(publishSuccess);
}
/// <summary>
/// Handles publish received messages during processing of QOS level 2 (Exactly once) messages.
/// </summary>
/// <param name="msg">The publish received message</param>
/// <returns>true or false, depending on the success of message processing.</returns>
private bool HandlePublishReceived(MqttMessage msg) {
var recvMsg = (MqttPublishReceivedMessage) msg;
// if we've got a matching message, respond with a "ok release it for processing"
if (publishedMessages.ContainsKey(recvMsg.VariableHeader.MessageIdentifier)) {
MqttPublishReleaseMessage relMsg = new MqttPublishReleaseMessage()
.WithMessageIdentifier(recvMsg.VariableHeader.MessageIdentifier);
connectionHandler.SendMessage(relMsg);
}
return true;
}
public void BasicSerialization()
{
var expected = new[]
{
(byte)0x60,
(byte)0x02,
(byte)0x0,
(byte)0x4,
};
MqttPublishReleaseMessage msg = new MqttPublishReleaseMessage().WithMessageIdentifier(4);
Console.WriteLine(msg.ToString());
byte[] actual = MessageSerializationHelper.GetMessageBytes(msg);
Assert.Equal<int>(expected.Length, actual.Length);
Assert.Equal<byte>(expected[0], actual[0]); // msg type of header
Assert.Equal<byte>(expected[1], actual[1]); // remaining length
Assert.Equal<byte>(expected[2], actual[2]); // connect ack - compression? always empty
Assert.Equal<byte>(expected[3], actual[3]); // return code.
}
