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using Microsoft.Azure.Devices.Client;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.Core;
namespace Tango.Telemetry.Destinations
{
public class AzureHubTelemetryDestination : ExtendedObject, ITelemetryDestination
{
private DeviceClient _hubClient;
public string Name { get; private set; } = "Azure IoT Hub";
public bool Enable { get; set; } = true;
public String ConnectionString { get; private set; }
public IReadOnlyList<TelemetrySource> SupportedSources { get; private set; }
public AzureHubTelemetryDestination(String connectionString)
{
ConnectionString = connectionString;
SupportedSources = new List<TelemetrySource>() { TelemetrySource.PendingStorage, TelemetrySource.Streaming, TelemetrySource.ExternalStorage };
}
public async Task Publish(TelemetryPublishPackage package, List<KeyValuePair<String, String>> properties)
{
if (_hubClient == null)
{
_hubClient = DeviceClient.CreateFromConnectionString(ConnectionString, TransportType.Mqtt);
_hubClient.SetConnectionStatusChangesHandler((status, reason) =>
{
LogManager.Log($"IoT hub status changed to: {status}, Reason: {reason}.");
});
}
var message = new Message(Encoding.UTF8.GetBytes(package.ToPayload()))
{
ContentType = "application/json",
ContentEncoding = "utf-8"
};
foreach (var prop in properties)
{
message.Properties.Add(prop.Key, prop.Value);
}
await _hubClient.SendEventAsync(message);
}
public void Dispose()
{
_hubClient?.Dispose();
}
}
}
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