/// <summary>
/// Serializes the TempHumidityEvent to JSON and sends it to the Event Hub's REST API
/// </summary>
/// <param name="tempHumidityEvent"></param>
/// <returns></returns>
private async Task SendEventAsync(TempHumidityEvent tempHumidityEvent)
{
// Convert TempHumidityEvent to JSON
var json = JsonConvert.SerializeObject(tempHumidityEvent);
var content = new StringContent(json);
// Send event
var response = await httpClient.PostAsync(baseAddress + "/dachautemp/messages", content);
if (response.StatusCode == HttpStatusCode.Unauthorized)
{
// Maybe token expired available. Renew and try again
RefreshAccessToken();
// Try again
content = new StringContent(json);
response = await httpClient.PostAsync(baseAddress + "/dachautemp/messages", content);
}
// Check if everything went fine
if (!response.IsSuccessStatusCode)
{
throw new UnauthorizedAccessException("Could not connect to Azure Event Hub. Access denied.");
}
}
/// <summary>
/// Sends a new combination of temperature, humidity and a time stamp to the Event Hub
/// </summary>
/// <param name="temperature">Current temperature</param>
/// <param name="humidity">Current humidity</param>
/// <returns></returns>
public async Task SendTempAndHumidityAsync(double temperature, double humidity)
{
// Round to full seconds and milliseconds
var now = DateTime.Now.ToUniversalTime();
now = now.AddSeconds(now.Second * -1).AddMilliseconds(now.Millisecond * -1);
var tempHumidityEvent = new TempHumidityEvent {
DateTime = now, Temperature = temperature, Humidity = humidity
};
await SendEventAsync(tempHumidityEvent);
}