public void StartManualPolling(
String checkpointTokenFrom,
Int32 bufferSize = 4000,
String pollerName = "CommitPollingClient")
{
_bufferSize = bufferSize;
_checkpointTokenCurrent = checkpointTokenFrom;
LastException = null;
//prepare single poller thread.
CreateTplChain();
_pollerThread = new Thread(PollerFunc);
_pollerThread.IsBackground = true;
_pollerThread.Name = pollerName;
_pollerThread.Start();
MetricsHelper.SetCommitPollingClientBufferSize(pollerName, () => GetClientBufferSize());
}
private void RegisterHealthChecks(string pollerName)
{
MetricsHelper.SetCommitPollingClientBufferSize(pollerName, () => GetClientBufferSize());
//Set health check for polling
HealthChecks.RegisterHealthCheck("Polling-" + pollerName, () =>
{
if (Status == CommitPollingClientStatus.Stopped)
{
//poller is stopped, system healty
return(HealthCheckResult.Healthy("Automatic polling stopped"));
}
else if (Status == CommitPollingClientStatus.Faulted || LastException != null)
{
//poller is stopped, system healty
var exceptionText = (LastException != null ? LastException.ToString() : "");
exceptionText = exceptionText.Replace("{", "{{").Replace("}", "}}");
return(HealthCheckResult.Unhealthy("Faulted (exception in consumer): " + exceptionText));
}
var elapsed = DateTime.UtcNow - _innerClient.LastActivityTimestamp;
if (elapsed.TotalMilliseconds > 5000)
{
//more than 5 seconds without a poll, polling probably is stopped
return(HealthCheckResult.Unhealthy(String.Format("poller stuck, last polling {0} ms ago", elapsed)));
}
return(HealthCheckResult.Healthy("Poller alive"));
});
//Now register health check for the internal NES poller, to diagnose errors in polling.
HealthChecks.RegisterHealthCheck("Polling internal errors: ", () =>
{
if (_innerClient != null && !String.IsNullOrEmpty(_innerClient.LastPollingError))
{
return(HealthCheckResult.Unhealthy($"Inner NES poller has error: {_innerClient.LastPollingError}"));
}
return(HealthCheckResult.Healthy("Inner NES Poller Ok"));
});
}
