ServerBootstrap SetupBootstrap()
{
// pull/customize configuration
int maxInboundMessageSize = this.settingsProvider.GetIntegerSetting("MaxInboundMessageSize", 256 * 1024);
int connectionPoolSize = this.settingsProvider.GetIntegerSetting("IotHubClient.ConnectionPoolSize", DefaultConnectionPoolSize);
TimeSpan connectionIdleTimeout = this.settingsProvider.GetTimeSpanSetting("IotHubClient.ConnectionIdleTimeout", DefaultConnectionIdleTimeout);
string connectionString = this.iotHubClientSettings.IotHubConnectionString;
// setup message processing logic
var telemetryProcessing = TopicHandling.CompileParserFromUriTemplates(new[] { "devices/{deviceId}/messages/events" });
var commandProcessing = TopicHandling.CompileFormatterFromUriTemplate("devices/{deviceId}/messages/devicebound");
MessagingBridgeFactoryFunc bridgeFactory = IotHubBridge.PrepareFactory(connectionString, connectionPoolSize,
connectionIdleTimeout, this.iotHubClientSettings, bridge =>
{
bridge.RegisterRoute(topic => true, new TelemetrySender(bridge, telemetryProcessing)); // handle all incoming messages with TelemetrySender
bridge.RegisterSource(new CommandReceiver(bridge, PooledByteBufferAllocator.Default, commandProcessing)); // handle device command queue
bridge.RegisterSource(new MethodHandler("SendMessageToDevice", bridge, (request, dispatcher) => DispatchCommands(bridge.DeviceId, request, dispatcher))); // register
});
var acceptLimiter = new AcceptLimiter(MaxConcurrentAccepts);
return(new ServerBootstrap()
.Group(this.parentEventLoopGroup, this.eventLoopGroup)
.Option(ChannelOption.SoBacklog, ListenBacklogSize)
.Option(ChannelOption.AutoRead, false)
.ChildOption(ChannelOption.Allocator, PooledByteBufferAllocator.Default)
.ChildOption(ChannelOption.AutoRead, false)
.Channel <TcpServerSocketChannel>()
.Handler(acceptLimiter)
.ChildHandler(new ActionChannelInitializer <ISocketChannel>(channel =>
{
channel.Pipeline.AddLast(
TlsHandler.Server(this.tlsCertificate),
new AcceptLimiterTlsReleaseHandler(acceptLimiter),
MqttEncoder.Instance,
new MqttDecoder(true, maxInboundMessageSize),
new MqttAdapter(
this.settings,
this.sessionStateManager,
this.authProvider,
this.qos2StateProvider,
bridgeFactory));
})));
}
async Task EnsureServerInitializedAsync()
{
if (this.ServerAddress != null)
{
return;
}
int threadCount = Environment.ProcessorCount;
var executorGroup = new MultithreadEventLoopGroup(threadCount);
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 iotHubClientSettings = new IotHubClientSettings(this.settingsProvider);
var authProvider = new SasTokenDeviceIdentityProvider();
var telemetryProcessing = TopicHandling.CompileParserFromUriTemplates(new[] { "devices/{deviceId}/messages/events" });
var commandProcessing = TopicHandling.CompileFormatterFromUriTemplate("devices/{deviceId}/messages/devicebound/{subTopic=}");
MessagingBridgeFactoryFunc bridgeFactory = IotHubBridge.PrepareFactory(iotHubClientSettings.IotHubConnectionString, 400, TimeSpan.FromMinutes(5),
iotHubClientSettings, bridge =>
{
bridge.RegisterRoute(topic => true, new TelemetrySender(bridge, telemetryProcessing)); // handle all incoming messages with TelemetrySender
bridge.RegisterSource(new CommandReceiver(bridge, PooledByteBufferAllocator.Default, commandProcessing)); // handle device command queue
bridge.RegisterSource(new MethodHandler("command", bridge, (request, dispatcher) => DispatchCommands(bridge.DeviceId, request, dispatcher))); // register
});
ServerBootstrap server = new ServerBootstrap()
.Group(executorGroup)
.Channel <TcpServerSocketChannel>()
.ChildOption(ChannelOption.Allocator, PooledByteBufferAllocator.Default)
.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("SERVER"),
new MqttAdapter(
settings,
sessionStateProvider,
authProvider,
qos2StateProvider,
bridgeFactory),
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;
}
