private async Task NextSync(TimeSpan timeout, CancellationToken cancellationToken)
{
Trace.TraceInformation("NextSync started.");
try
{
Trace.TraceInformation($"Before provider.");
using (var provider = new TemperatureProvider())
{
var lastDateTime = await provider.GetLastTemperatureDate();
DateTime requestDateTime;
if (lastDateTime.HasValue)
{
requestDateTime = lastDateTime.Value;
Trace.TraceInformation($"Last date in database is {lastDateTime}. ");
}
else
{
requestDateTime = _defaultDateTime;
Trace.TraceInformation($"Last date in database is absent. Use default datetime {_defaultDateTime}");
}
requestDateTime = requestDateTime.AddMinutes(1);
var httpDownload = new HttpDownload(_httpUrl);
Trace.TraceInformation($"Send request with date {requestDateTime}. ");
httpDownload.SendRequest(requestDateTime);
httpDownload.GetResponse();
if (httpDownload.IsPagePresent())
{
var device = httpDownload.DownloadTemperature();
Trace.TraceInformation($"Device name {device.Name}. Found {device.Temperatures.Count()} temperatures information. ");
if (device.Temperatures.Any())
{
Trace.TraceInformation($"Start add {device.Temperatures.Count()} items temperatures information to database. ");
var deviceId = await provider.AddDeviceIfNotExist(device);
Task task = provider.AddTemperatures(deviceId, device.Temperatures);
}
}
else
{
Trace.TraceWarning($"Response without StatusCode - OK");
}
await Task.Delay(timeout, cancellationToken);
}
}
catch (OperationCanceledException)
{
return;
}
catch (HttpRequestException ex)
{
if ((timeout += timeout) > _maxTimeout)
{
Trace.TraceError($"Communication error, but maximum timeout was reached. Sync will be terminated. {ex}");
Environment.Exit(1);
}
else
{
Trace.TraceWarning($"Communication error. Timeout increased to {timeout}. {ex}");
Trace.TraceInformation("Timeout " + timeout);
await Task.Delay(timeout, cancellationToken);
}
}
finally
{
Trace.TraceWarning("Before NextSync");
await NextSync(timeout, cancellationToken);
}
}
