private async Task PublishMessage(IEnumerable <Tuple <IMqttSession, QoS> > subscriptions, String topic, byte[] payload)
{
String messageId = null; //Used to for non QoS 0 messages, to store message for sending.
PublishMessage message = null; //Used for QoS 0 messages, to send the message. Can reuse since there is no message identifier.
foreach (Tuple <IMqttSession, QoS> subscription in subscriptions)
{
//Persist a reference and queue if QoS > 0
if (subscription.Item2 != QoS.BestEffort)
{
//Save the message if we haven't already.
if (messageId == null)
{
messageId = await storageProvider.StoreMessage(new InFlightMessage(topic, payload));
}
else
{
await storageProvider.ReferenceMessage(messageId);
}
subscription.Item1.Publish(messageId, subscription.Item2);
}
else
{
TcpClient subscriber;
//Non-Clean subscribers won't have a TcpConnection. Currently we drop messages to QoS 0 subscriptions on non-clean connection.
if (connections.TryGetValue(subscription.Item1, out subscriber))
{
if (message == null)
{
message = new PublishMessage(false, false, QoS.BestEffort, topic, payload, null);
}
try
{
await message.Write(subscriber.GetStream());
}
catch (Exception)
{
//Close socket?
}
}
}
}
}
private void PublishMessage(IEnumerable <Tuple <IMqttSession, MqttQos> > subscriptions, String topic, byte[] payload)
{
String messageId = null; //Used to for non QoS 0 messages, to store message for sending.
MqttPublishMessage message = null; //Used for QoS 0 messages, to send the message. Can reuse since there is no message identifier.
foreach (Tuple <IMqttSession, MqttQos> subscription in subscriptions)
{
//Persist a reference and queue if QoS > 0
if (subscription.Item2 != MqttQos.BestEffort)
{
//Save the message if we haven't already.
if (messageId == null)
{
messageId = storageProvider.StoreMessage(new InFlightMessage(topic, payload));
}
else
{
storageProvider.ReferenceMessage(messageId);
}
subscription.Item1.Publish(messageId, subscription.Item2);
}
else
{
if (message == null)
{
message = new MqttPublishMessage().WithQos(MqttQos.AtMostOnce);
}
try
{
subscription.Item1.Write(message);
}
catch (Exception)
{
//Close socket?
}
}
}
}
