private void OnError(object sender, EventSource.ExceptionEventArgs e)
{
var ex = e.Exception;
LogHelpers.LogException(_log, "Encountered EventSource error", ex);
var recoverable = true;
if (ex is EventSource.EventSourceServiceUnsuccessfulResponseException respEx)
{
int status = respEx.StatusCode;
_log.Error(HttpErrors.ErrorMessage(status, "streaming connection", "will retry"));
RecordStreamInit(true);
if (!HttpErrors.IsRecoverable(status))
{
recoverable = false;
_initTask.TrySetException(ex); // sends this exception to the client if we haven't already started up
((IDisposable)this).Dispose();
}
}
var errorInfo = ex is EventSource.EventSourceServiceUnsuccessfulResponseException re ?
DataSourceStatus.ErrorInfo.FromHttpError(re.StatusCode) :
DataSourceStatus.ErrorInfo.FromException(ex);
_dataSourceUpdates.UpdateStatus(recoverable ? DataSourceState.Interrupted : DataSourceState.Off,
errorInfo);
}
private async Task UpdateTaskAsync()
{
try
{
var response = await _featureFlagRequestor.FeatureFlagsAsync();
if (response.statusCode == 200)
{
var flagsAsJsonString = response.jsonResponse;
var allData = DataModelSerialization.DeserializeV1Schema(flagsAsJsonString);
_updateSink.Init(_user, allData);
if (_initialized.GetAndSet(true) == false)
{
_startTask.SetResult(true);
_log.Info("Initialized LaunchDarkly Polling Processor.");
}
}
}
catch (UnsuccessfulResponseException ex)
{
var errorInfo = DataSourceStatus.ErrorInfo.FromHttpError(ex.StatusCode);
if (HttpErrors.IsRecoverable(ex.StatusCode))
{
_log.Warn(HttpErrors.ErrorMessage(ex.StatusCode, "polling request", "will retry"));
_updateSink.UpdateStatus(DataSourceState.Interrupted, errorInfo);
}
else
{
_log.Error(HttpErrors.ErrorMessage(ex.StatusCode, "polling request", ""));
_updateSink.UpdateStatus(DataSourceState.Shutdown, errorInfo);
// if client is initializing, make it stop waiting
_startTask.TrySetResult(false);
((IDisposable)this).Dispose();
}
}
catch (JsonReadException ex)
{
_log.Error("Polling request received malformed data: {0}", LogValues.ExceptionSummary(ex));
_updateSink.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;
_log.Warn("Polling for feature flag updates failed: {0}", LogValues.ExceptionSummary(realEx));
_log.Debug(LogValues.ExceptionTrace(realEx));
_updateSink.UpdateStatus(DataSourceState.Interrupted,
DataSourceStatus.ErrorInfo.FromException(realEx));
}
}
private void OnError(object sender, EventSource.ExceptionEventArgs e)
{
var ex = e.Exception;
var recoverable = true;
DataSourceStatus.ErrorInfo errorInfo;
RecordStreamInit(true);
if (ex is EventSourceServiceUnsuccessfulResponseException respEx)
{
int status = respEx.StatusCode;
errorInfo = DataSourceStatus.ErrorInfo.FromHttpError(status);
if (!HttpErrors.IsRecoverable(status))
{
recoverable = false;
_log.Error(HttpErrors.ErrorMessage(status, "streaming connection", ""));
}
else
{
_log.Warn(HttpErrors.ErrorMessage(status, "streaming connection", "will retry"));
}
}
else
{
errorInfo = DataSourceStatus.ErrorInfo.FromException(ex);
_log.Warn("Encountered EventSource error: {0}", LogValues.ExceptionSummary(ex));
_log.Debug(LogValues.ExceptionTrace(ex));
}
_updateSink.UpdateStatus(recoverable ? DataSourceState.Interrupted : DataSourceState.Shutdown,
errorInfo);
if (!recoverable)
{
// Make _initTask complete to tell the client to stop waiting for initialization. We use
// TrySetResult rather than SetResult here because it might have already been completed
// (if for instance the stream started successfully, then restarted and got a 401).
_initTask.TrySetResult(false);
((IDisposable)this).Dispose();
}
}
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));
}
}