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 SasTokenDeviceIdentityProvider();
var topicNameRouter = new ConfigurableMessageRouter();
IotHubClientFactoryFunc iotHubClientFactoryMethod = IotHubClient.PreparePoolFactory(settings.IotHubConnectionString + ";DeviceId=stub", "a", 1);
var iotHubFactory = new IotHubCommunicationFactory(iotHubClientFactoryMethod);
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 LoggingHandler(),
new MqttIotHubAdapter(
settings,
sessionStateProvider,
authProvider,
qos2StateProvider,
iotHubFactory,
topicNameRouter),
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;
}
ServerBootstrap SetupBootstrap()
{
int maxInboundMessageSize = this.settingsProvider.GetIntegerSetting("MaxInboundMessageSize", 256 * 1024);
int connectionPoolSize;
if (!this.settingsProvider.TryGetIntegerSetting("IotHubClient.ConnectionPoolSize", out connectionPoolSize))
{
connectionPoolSize = DefaultConnectionPoolSize;
}
TimeSpan connectionIdleTimeout;
if (!this.settingsProvider.TryGetTimeSpanSetting("IotHubClient.ConnectionIdleTimeout", out connectionIdleTimeout))
{
connectionIdleTimeout = DefaultConnectionIdleTimeout;
}
string connectionString = this.settings.IotHubConnectionString;
if (connectionString.IndexOf("DeviceId=", StringComparison.OrdinalIgnoreCase) == -1)
{
connectionString += ";DeviceId=stub";
}
var deviceClientFactory = new ThreadLocal <IotHubClientFactoryFunc>(() =>
{
string poolId = Guid.NewGuid().ToString("N");
return(IotHubClient.PreparePoolFactory(connectionString, poolId, connectionPoolSize, connectionIdleTimeout));
});
var iotHubCommunicationFactory = new IotHubCommunicationFactory(deviceClientFactory.Value);
return(new ServerBootstrap()
.Group(this.parentEventLoopGroup, this.eventLoopGroup)
.Option(ChannelOption.SoBacklog, ListenBacklogSize)
.ChildOption(ChannelOption.Allocator, PooledByteBufferAllocator.Default)
.ChildOption(ChannelOption.AutoRead, false)
.Channel <TcpServerSocketChannel>()
.ChildHandler(new ActionChannelInitializer <ISocketChannel>(channel =>
{
channel.Pipeline.AddLast(TlsHandler.Server(this.tlsCertificate));
channel.Pipeline.AddLast(
MqttEncoder.Instance,
new MqttDecoder(true, maxInboundMessageSize),
new MqttIotHubAdapter(
this.settings,
this.sessionStateManager,
this.authProvider,
this.qos2StateProvider,
iotHubCommunicationFactory,
this.iotHubMessageRouter));
})));
}
