/// <summary>
/// Start the asynchronous communication with the API.
/// </summary>
public void StartAPI()
{
Task.Run(async() =>
{
try
{
if (DevFlags.LoggingEnabled)
{
Logger.APILog("Start processing");
}
await ProcessingCycle(cancellationToken.Token);
}
catch (OperationCanceledException e)
{
//Ignore, just return
if (DevFlags.LoggingEnabled)
{
Logger.APILog("Processing task was cancelled");
}
Logger.APILog("Recieved " + ResponsesRecieved + " responses");
Logger.APILog("Recieved " + ErrorResponses + " errors");
}
catch (Exception e)
{
Logger.Log("API_Helper - Error: " + e.Message);
}
});
}
/// <summary>
/// Uses the <see cref="cancellationToken"/> to cancel all tasks.
/// </summary>
public void StopAPI()
{
if (!cancellationToken.IsCancellationRequested)
{
if (DevFlags.LoggingEnabled)
{
Logger.APILog("Cancelling Tasks");
}
cancellationToken.Cancel();
}
}
/// <summary>
/// Implementation of the actual communication with the API used by <see cref="ProcessingCycle(CancellationToken)"/>.
/// </summary>
/// <param name="currentModel">Data that will be sent to the API.</param>
/// <param name="myClient">HttpClient that is used for the communication.</param>
/// <param name="ct">Token that throws an OperationCancelledException when the token state is set to cancel. Used to stop the task.</param>
/// <returns>Task[EssentiaModel], method can be run asynchronously. Actual return data is the EssentiaModel</returns>
private async Task <EssentiaModel> DoAPICall(EssentiaModel currentModel, HttpClient myClient, CancellationToken ct)
{
ct.ThrowIfCancellationRequested();
EssentiaModel apiModel = null;
using (HttpRequestMessage request = new HttpRequestMessage())
{
request.RequestUri = new Uri(ApiAddress);
request.Method = HttpMethod.Post;
request.Headers.Add("Accept", "application/json");
var requestContent = JsonConvert.SerializeObject(currentModel);
request.Content = new StringContent(requestContent, Encoding.UTF8, "application/json");
ct.ThrowIfCancellationRequested();
HttpResponseMessage response = await myClient.SendAsync(request);
if (response.StatusCode == HttpStatusCode.OK)
{
ResponsesRecieved++;
HttpContent content = response.Content;
string json = await content.ReadAsStringAsync();
apiModel = JsonConvert.DeserializeObject <EssentiaModel>(json);
if (DevFlags.LoggingEnabled)
{
Logger.APILog("Response == OK -" + apiModel.chordData);
}
}
else if (DevFlags.LoggingEnabled)
{
Logger.APILog("Response != OK"); ErrorResponses++;
}
}
ct.ThrowIfCancellationRequested();
return(apiModel);
}