private void RetryOrStopIfNecessary(HttpStatusCode statusCode)
{
if (!IsRunning || ((int)statusCode >= 200 && (int)statusCode <= 299))
{
return;
}
if (!Continuous)
{
_workExecutor.StartNew(Stop);
return;
}
if (!Misc.IsTransientError(statusCode))
{
//
Log.To.ChangeTracker.I(Tag, String.Format
("{0} got a non-transient error ({1}), stopping NOW...", this, statusCode));
_workExecutor.StartNew(Stop);
return;
}
Log.To.ChangeTracker.I(Tag, "{0} transient error ({1}) detected, sleeping for {2}ms...", this,
statusCode, Backoff.GetSleepTime().TotalMilliseconds);
Backoff.DelayAppropriateAmountOfTime().ContinueWith(t => PerformRetry(true));
}
private void RetryOrStopIfNecessary(Exception e)
{
if (!IsRunning)
{
return;
}
if (e == null)
{
// No error occurred, keep going if continuous
if (Continuous)
{
PerformRetry(false);
}
else
{
_workExecutor.StartNew(Stop);
}
return;
}
Error = Misc.Flatten(e).First();
string statusCode;
if (Misc.IsTransientNetworkError(e, out statusCode))
{
// Transient error occurred in a replication -> RETRY or STOP
if (!Continuous && !Backoff.CanContinue)
{
// Give up for non-continuous
Log.To.ChangeTracker.I(Tag, "{0} transient error ({1}) detected, giving up NOW...", this,
statusCode);
_workExecutor.StartNew(Stop);
return;
}
// Keep retrying for continuous
Log.To.ChangeTracker.I(Tag, "{0} transient error ({1}) detected, sleeping for {2}ms...", this,
statusCode, Backoff.GetSleepTime().TotalMilliseconds);
Backoff.DelayAppropriateAmountOfTime().ContinueWith(t => PerformRetry(true));
return;
}
if (String.IsNullOrEmpty(statusCode))
{
Log.To.ChangeTracker.I(Tag, String.Format
("{0} got an exception, stopping NOW...", this), e);
}
else
{
Log.To.ChangeTracker.I(Tag, String.Format
("{0} got a non-transient error ({1}), stopping NOW...", this, statusCode));
}
// Non-transient error occurred in a continuous replication -> STOP
_workExecutor.StartNew(Stop);
}
private Task ChangeFeedResponseHandler(Task <HttpResponseMessage> responseTask)
{
if (ResponseFailed(responseTask))
{
return(Task.FromResult(false));
}
var response = responseTask.Result;
UpdateServerType(response);
if (response.Content == null)
{
throw Misc.CreateExceptionAndLog(Log.To.ChangeTracker, response.StatusCode.GetStatusCode(), Tag,
"Got empty change tracker response");
}
Log.To.ChangeTracker.D(Tag, "Getting stream from change tracker response");
return(response.Content.ReadAsStreamAsync().ContinueWith((Task <Stream> t) =>
{
try {
var result = _responseLogic.ProcessResponseStream(t?.Result, changesFeedRequestTokenSource == null ? CancellationToken.None : changesFeedRequestTokenSource.Token);
Backoff.ResetBackoff();
if (result == ChangeTrackerResponseCode.ChangeHeartbeat)
{
Heartbeat = _responseLogic.Heartbeat;
_workExecutor.StartNew(Run);
}
} catch (CouchbaseLiteException e) {
if (e.Code == StatusCode.BadJson)
{
if (Backoff.CanContinue)
{
Log.To.ChangeTracker.W(Tag, "{0} Couldn't parse JSON from remote, " +
"retrying in {1}ms", this, Backoff.GetSleepTime().TotalMilliseconds);
Backoff.DelayAppropriateAmountOfTime().ContinueWith(t1 => {
Log.To.ChangeTracker.I(Tag, "{0} retrying NOW...", this);
_workExecutor.StartNew(Run);
});
}
else
{
RetryOrStopIfNecessary(e);
}
}
} catch (Exception e) {
RetryOrStopIfNecessary(e);
} finally {
Misc.SafeDispose(ref changesFeedRequestTokenSource);
response.Dispose();
}
}));
}
