public MqttAdapter(
Settings settings,
ISessionStatePersistenceProvider sessionStateManager,
IDeviceIdentityProvider authProvider,
IQos2StatePersistenceProvider qos2StateProvider,
MqttBridgeFactoryFunc messagingBridgeFactory)
{
Contract.Requires(settings != null);
Contract.Requires(sessionStateManager != null);
Contract.Requires(authProvider != null);
Contract.Requires(messagingBridgeFactory != null);
if (qos2StateProvider != null)
{
this.maxSupportedQosToClient = QualityOfService.ExactlyOnce;
this.qos2StateProvider = qos2StateProvider;
}
else
{
this.maxSupportedQosToClient = QualityOfService.AtLeastOnce;
}
this.settings = settings;
this.sessionStateManager = sessionStateManager;
this.authProvider = authProvider;
this.messagingBridgeFactory = messagingBridgeFactory;
}
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 topicNameRouter = new ConfigurableMessageAddressConverter();
var iotHubClientFactory = IotHubClient.PreparePoolFactory(iotHubClientSettings.IotHubConnectionString, 400, TimeSpan.FromMinutes(5),
iotHubClientSettings, PooledByteBufferAllocator.Default, topicNameRouter);
MqttBridgeFactoryFunc bridgeFactory = async identity => new SingleClientMqttMessagingBridge(await iotHubClientFactory(identity));
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;
}
ServerBootstrap SetupBootstrap()
{
if (this.settings.DeviceReceiveAckCanTimeout && this.iotHubClientSettings.MaxPendingOutboundMessages > 1)
{
throw new InvalidOperationException("Cannot maintain ordering on retransmission with more than 1 allowed pending outbound message.");
}
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;
Func <IDeviceIdentity, Task <IMessagingServiceClient> > deviceClientFactory = IotHubClient.PreparePoolFactory(connectionString, connectionPoolSize,
connectionIdleTimeout, this.iotHubClientSettings, PooledByteBufferAllocator.Default, this.topicNameConverter);
MqttBridgeFactoryFunc bridgeFactory = async deviceIdentity => new SingleClientMqttMessagingBridge(await deviceClientFactory(deviceIdentity));
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 MqttAdapter(
this.settings,
this.sessionStateManager,
this.authProvider,
this.qos2StateProvider,
bridgeFactory));
})));
}
