/// <summary>
/// The is the core function to create a response. This function will not be called
/// if <see cref="IRequestHandler.IsMatch"/> returns <c>false</c>.
/// </summary>
/// <param name="request">The request message received.</param>
/// <param name="parameters">The parameters that are extracted using the <see cref="IRequestHandler.IsMatch"/>
/// method.</param>
/// <param name="cancellationToken">
/// The cancellation token passed to the async method.
/// </param>
/// <param name="logger">
/// The verbose logger.
/// </param>
/// <returns>The generated http response message.</returns>
public async Task <HttpResponseMessage> HandleAsync(
HttpRequestMessage request,
IDictionary <string, object> parameters,
CancellationToken cancellationToken,
IServerLogger logger = null)
{
IServerLogger actualLogger = logger ?? new DummyLogger();
if (Name != null)
{
HttpRequestMessage cloned = await CloneHttpRequestMessageAsync(request).ConfigureAwait(false);
actualLogger.Log($"[Handler] Record calling history with name '{Name}'");
callingHistories.Enqueue(new CallingHistoryContext(cloned, parameters));
}
try
{
return(CreateResponse(request, parameters, cancellationToken));
}
catch (Exception error)
{
actualLogger.Log($"[Handler] Unexpected error occured during handler evaluation: {error.Message}. Will return Internal Server Error");
return(new HttpResponseMessage(HttpStatusCode.InternalServerError)
{
Content = new StringContent(error.ToString())
});
}
}
public async Task StartLoop()
{
_logger.Log("Starting the loop");
_payloads = await _payloadLoader.GetPayloadsAsync();
_poll.SetPayloadSource(_payloads);
while (true)
{
await Task.Delay(TimeSpan.FromSeconds(1));
await UpdatePollAsync();
}
}
private static void RepeatIfFailed(Action action, IServerLogger serverLogger, int attempt = 0)
{
try
{
action();
}
catch (Exception e)
{
var delay = AttemptDelay * Math.Pow(2, attempt);
serverLogger.Log($"Internet is{(Internet.IsAvailable() ? null : " NOT")} available");
serverLogger.Log(e.GetFullDescription($"Attempt #{attempt} failed, next try in {delay}"));
Thread.Sleep(delay);
RepeatIfFailed(action, serverLogger, attempt + 1);
}
}
private static void UnhandledExceptionTrapper(UnhandledExceptionEventArgs e, IServerLogger serverLogger)
{
serverLogger.Log(e.ExceptionObject.ToString());
}