static async Task <IotHubBridge> CreateFromConnectionStringAsync(string deviceId, string connectionString,
int connectionPoolSize, TimeSpan?connectionIdleTimeout, IotHubClientSettings settings, CancellationToken cancellationToken)
{
int maxPendingOutboundMessages = settings.MaxPendingOutboundMessages;
var tcpSettings = new AmqpTransportSettings(TransportType.Amqp_Tcp_Only);
var webSocketSettings = new AmqpTransportSettings(TransportType.Amqp_WebSocket_Only);
webSocketSettings.PrefetchCount = tcpSettings.PrefetchCount = (uint)maxPendingOutboundMessages;
if (connectionPoolSize > 0)
{
var amqpConnectionPoolSettings = new AmqpConnectionPoolSettings
{
MaxPoolSize = unchecked ((uint)connectionPoolSize),
Pooling = connectionPoolSize > 0
};
if (connectionIdleTimeout.HasValue)
{
amqpConnectionPoolSettings.ConnectionIdleTimeout = connectionIdleTimeout.Value;
}
tcpSettings.AmqpConnectionPoolSettings = amqpConnectionPoolSettings;
webSocketSettings.AmqpConnectionPoolSettings = amqpConnectionPoolSettings;
}
var client = DeviceClient.CreateFromConnectionString(connectionString, new ITransportSettings[]
{
tcpSettings,
webSocketSettings
});
client.SetRetryPolicy(DeviceClientRetryPolicy.Instance);
var bridge = new IotHubBridge(client, deviceId, settings);
client.SetConnectionStatusChangesHandler((status, reason) => {
if (status != ConnectionStatus.Connected)
{
var cause = new IotHubCommunicationException("Connection to IoT Hub is closed");
if (Interlocked.CompareExchange(ref bridge.closedCause, cause, null) == null)
{
bridge.messagingChannel?.Close(cause);
}
}
});
// This helps in usage instrumentation at IotHub service.
client.ProductInfo = $"protocolgateway/poolsize={connectionPoolSize}";
try
{
await client.OpenAsync(cancellationToken);
cancellationToken.ThrowIfCancellationRequested(); // in case SDK does not always honor cancellation token in async operations
}
catch (IotHubException ex)
{
client.Dispose();
throw ex.ToMessagingException();
}
catch (Exception)
{
client.Dispose();
throw;
}
return(bridge);
}
public CommandReceiver(IotHubBridge bridge, IByteBufferAllocator allocator, TryFormatAddress addressFormatter)
{
this.bridge = bridge;
this.allocator = allocator;
this.addressFormatter = addressFormatter;
}
public TelemetrySender(IotHubBridge bridge, TryProcessMessage messageProcessor)
{
this.bridge = bridge;
this.messageProcessor = messageProcessor;
}
public MethodHandler(string methodName, IotHubBridge bridge, MethodHandlerCallback dispatchCallback)
{
this.methodName = methodName;
this.bridge = bridge;
this.dispatchCallback = dispatchCallback;
}
