public static QualityOfService DeriveQos(Message message, Settings config)
{
QualityOfService qos;
string qosValue;
if (message.Properties.TryGetValue(config.QoSPropertyName, out qosValue))
{
int qosAsInt;
if (int.TryParse(qosValue, out qosAsInt))
{
qos = (QualityOfService)qosAsInt;
if (qos > QualityOfService.ExactlyOnce)
{
MqttIotHubAdapterEventSource.Log.Warning(string.Format("Message defined QoS '{0}' is not supported. Downgrading to default value of '{1}'", qos, config.DefaultPublishToClientQoS));
qos = config.DefaultPublishToClientQoS;
}
}
else
{
MqttIotHubAdapterEventSource.Log.Warning(string.Format("Message defined QoS '{0}' could not be parsed. Resorting to default value of '{1}'", qosValue, config.DefaultPublishToClientQoS));
qos = config.DefaultPublishToClientQoS;
}
}
else
{
qos = config.DefaultPublishToClientQoS;
}
return qos;
}
public MqttIotHubAdapter(Settings settings, DeviceClientFactoryFunc deviceClientFactory, ISessionStatePersistenceProvider sessionStateManager, IAuthenticationProvider authProvider,
ITopicNameRouter topicNameRouter, IQos2StatePersistenceProvider qos2StateProvider)
{
Contract.Requires(settings != null);
Contract.Requires(sessionStateManager != null);
Contract.Requires(authProvider != null);
Contract.Requires(topicNameRouter != null);
if (qos2StateProvider != null)
{
this.maxSupportedQosToClient = QualityOfService.ExactlyOnce;
this.qos2StateProvider = qos2StateProvider;
}
else
{
this.maxSupportedQosToClient = QualityOfService.AtLeastOnce;
}
this.settings = settings;
this.deviceClientFactory = deviceClientFactory;
this.sessionStateManager = sessionStateManager;
this.authProvider = authProvider;
this.topicNameRouter = topicNameRouter;
this.publishProcessor = new PacketAsyncProcessor<PublishPacket>(this.PublishToServerAsync);
this.publishProcessor.Completion.OnFault(ShutdownOnPublishToServerFaultAction);
TimeSpan? ackTimeout = this.settings.DeviceReceiveAckCanTimeout ? this.settings.DeviceReceiveAckTimeout : (TimeSpan?)null;
this.publishPubAckProcessor = new RequestAckPairProcessor<AckPendingMessageState, PublishPacket>(this.AcknowledgePublishAsync, this.RetransmitNextPublish, ackTimeout);
this.publishPubAckProcessor.Completion.OnFault(ShutdownOnPubAckFaultAction);
this.publishPubRecProcessor = new RequestAckPairProcessor<AckPendingMessageState, PublishPacket>(this.AcknowledgePublishReceiveAsync, this.RetransmitNextPublish, ackTimeout);
this.publishPubRecProcessor.Completion.OnFault(ShutdownOnPubRecFaultAction);
this.pubRelPubCompProcessor = new RequestAckPairProcessor<CompletionPendingMessageState, PubRelPacket>(this.AcknowledgePublishCompleteAsync, this.RetransmitNextPublishRelease, ackTimeout);
this.pubRelPubCompProcessor.Completion.OnFault(ShutdownOnPubCompFaultAction);
}
public static QualityOfService DeriveQos(IMessage message, Settings config, string scope)
{
string qosValue;
if (!message.Properties.TryGetValue(config.QoSPropertyName, out qosValue))
{
return config.DefaultPublishToClientQoS;
}
if (qosValue.Length > 1)
{
CommonEventSource.Log.Warning($"Message defined QoS '{qosValue}' is not supported. Downgrading to default value of '{config.DefaultPublishToClientQoS}'", scope);
return config.DefaultPublishToClientQoS;
}
switch (qosValue[0])
{
case '0':
return QualityOfService.AtMostOnce;
case '1':
return QualityOfService.AtLeastOnce;
case '2':
return QualityOfService.ExactlyOnce;
default:
CommonEventSource.Log.Warning($"Message defined QoS '{qosValue}' is not supported. Downgrading to default value of '{config.DefaultPublishToClientQoS}'", scope);
return config.DefaultPublishToClientQoS;
}
}
public Bootstrapper(ISettingsProvider settingsProvider, ISessionStatePersistenceProvider sessionStateManager, IQos2StatePersistenceProvider qos2StateProvider)
{
Contract.Requires(settingsProvider != null);
Contract.Requires(sessionStateManager != null);
this.closeCompletionSource = new TaskCompletionSource();
this.settingsProvider = settingsProvider;
this.settings = new Settings(this.settingsProvider);
this.sessionStateManager = sessionStateManager;
this.qos2StateProvider = qos2StateProvider;
this.authProvider = new SasTokenAuthenticationProvider();
this.topicNameRouter = new TopicNameRouter();
}
Bootstrapper(ISettingsProvider settingsProvider, ISessionStatePersistenceProvider sessionStateManager, IQos2StatePersistenceProvider qos2StateProvider, IMessageAddressConverter addressConverter)
{
Contract.Requires(settingsProvider != null);
Contract.Requires(sessionStateManager != null);
this.closeCompletionSource = new TaskCompletionSource();
this.settingsProvider = settingsProvider;
this.settings = new Settings(this.settingsProvider);
this.iotHubClientSettings = new IotHubClientSettings(this.settingsProvider);
this.sessionStateManager = sessionStateManager;
this.qos2StateProvider = qos2StateProvider;
this.authProvider = new SasTokenDeviceIdentityProvider();
this.topicNameConverter = addressConverter;
}
public static Message CompleteMessageFromPacket(Message message, PublishPacket packet, Settings settings)
{
message.MessageId = Guid.NewGuid().ToString("N");
if (packet.RetainRequested)
{
message.Properties[settings.RetainPropertyName] = IotHubTrueString;
}
if (packet.Duplicate)
{
message.Properties[settings.DupPropertyName] = IotHubTrueString;
}
return message;
}
async Task EnsureServerInitializedAsync()
{
if (this.ServerAddress != null)
{
return;
}
int threadCount = Environment.ProcessorCount;
var executorGroup = new MultithreadEventLoopGroup(threadCount);
var bufAllocator = new PooledByteBufferAllocator(16 * 1024, 10 * 1024 * 1024 / threadCount); // reserve 10 MB for 64 KB buffers
BlobSessionStatePersistenceProvider sessionStateProvider = await BlobSessionStatePersistenceProvider.CreateAsync(
this.settingsProvider.GetSetting("BlobSessionStatePersistenceProvider.StorageConnectionString"),
this.settingsProvider.GetSetting("BlobSessionStatePersistenceProvider.StorageContainerName"));
TableQos2StatePersistenceProvider qos2StateProvider = await TableQos2StatePersistenceProvider.CreateAsync(
this.settingsProvider.GetSetting("TableQos2StatePersistenceProvider.StorageConnectionString"),
this.settingsProvider.GetSetting("TableQos2StatePersistenceProvider.StorageTableName"));
var settings = new Settings(this.settingsProvider);
var authProvider = new SasTokenAuthenticationProvider();
var topicNameRouter = new TopicNameRouter();
DeviceClientFactoryFunc deviceClientFactoryFactory = IotHubDeviceClient.PreparePoolFactory(settings.IotHubConnectionString + ";DeviceId=stub", "a", 1);
ServerBootstrap server = new ServerBootstrap()
.Group(executorGroup)
.Channel<TcpServerSocketChannel>()
.ChildOption(ChannelOption.Allocator, bufAllocator)
.ChildOption(ChannelOption.AutoRead, false)
.ChildHandler(new ActionChannelInitializer<IChannel>(ch =>
{
ch.Pipeline.AddLast(TlsHandler.Server(this.tlsCertificate));
ch.Pipeline.AddLast(
MqttEncoder.Instance,
new MqttDecoder(true, 256 * 1024),
new MqttIotHubAdapter(
settings,
deviceClientFactoryFactory,
sessionStateProvider,
authProvider,
topicNameRouter,
qos2StateProvider),
new XUnitLoggingHandler(this.output));
}));
IChannel serverChannel = await server.BindAsync(IPAddress.Any, this.ProtocolGatewayPort);
this.ScheduleCleanup(async () =>
{
await serverChannel.CloseAsync();
await executorGroup.ShutdownGracefullyAsync();
});
this.ServerAddress = IPAddress.Loopback;
}
public static IMessage CompleteMessageFromPacket(IMessage message, PublishPacket packet, Settings settings)
{
if (packet.RetainRequested)
{
message.Properties[settings.RetainPropertyName] = IotHubTrueString;
}
if (packet.Duplicate)
{
message.Properties[settings.DupPropertyName] = IotHubTrueString;
}
return message;
}
