private async Task UpdateTaskAsync()
{
_log.Info("Polling LaunchDarkly for feature flag updates");
try
{
var allData = await _featureRequestor.GetAllDataAsync();
if (allData is null)
{
// This means it was cached, and alreadyInited was true
_dataSourceUpdates.UpdateStatus(DataSourceState.Valid, null);
}
else
{
if (_dataSourceUpdates.Init(allData.Value))
{
_dataSourceUpdates.UpdateStatus(DataSourceState.Valid, null);
if (!_initialized.GetAndSet(true))
{
_initTask.SetResult(true);
_log.Info("First polling request successful");
}
}
}
}
catch (UnsuccessfulResponseException ex)
{
_log.Error(HttpErrors.ErrorMessage(ex.StatusCode, "polling request", "will retry"));
var errorInfo = DataSourceStatus.ErrorInfo.FromHttpError(ex.StatusCode);
if (HttpErrors.IsRecoverable(ex.StatusCode))
{
_dataSourceUpdates.UpdateStatus(DataSourceState.Interrupted, errorInfo);
}
else
{
_dataSourceUpdates.UpdateStatus(DataSourceState.Off, errorInfo);
try
{
// if client is initializing, make it stop waiting
_initTask.SetResult(true);
}
catch (InvalidOperationException)
{
// the task was already set - nothing more to do
}
((IDisposable)this).Dispose();
}
}
catch (JsonReadException ex)
{
_log.Error("Polling request received malformed data: {0}", LogValues.ExceptionSummary(ex));
_dataSourceUpdates.UpdateStatus(DataSourceState.Interrupted,
new DataSourceStatus.ErrorInfo
{
Kind = DataSourceStatus.ErrorKind.InvalidData,
Time = DateTime.Now
});
}
catch (Exception ex)
{
Exception realEx = (ex is AggregateException ae) ? ae.Flatten() : ex;
LogHelpers.LogException(_log, "Polling for feature flag updates failed", realEx);
_dataSourceUpdates.UpdateStatus(DataSourceState.Interrupted,
DataSourceStatus.ErrorInfo.FromException(realEx));
}
}
public Task <bool> Start()
{
_updates.Init(_parent.MakeInitData());
_updates.UpdateStatus(DataSourceState.Valid, null);
return(Task.FromResult(true));
}