protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
while (!stoppingToken.IsCancellationRequested)
{
stoppingToken.ThrowIfCancellationRequested();
try
{
IProcessInfo pi = await _services.GetProcessAsync(processKey : null, stoppingToken);
var client = new DiagnosticsClient(pi.EndpointInfo.Endpoint);
MetricsOptions options = _optionsMonitor.CurrentValue;
GlobalCounterOptions counterOptions = _counterOptions.CurrentValue;
using var optionsTokenSource = new CancellationTokenSource();
//If metric options change, we need to cancel the existing metrics pipeline and restart with the new settings.
using IDisposable monitorListener = _optionsMonitor.OnChange((_, _) => optionsTokenSource.SafeCancel());
EventPipeCounterPipelineSettings counterSettings = EventCounterSettingsFactory.CreateSettings(counterOptions, options);
_counterPipeline = new EventCounterPipeline(client, counterSettings, loggers: new[] { new MetricsLogger(_store.MetricsStore) });
using var linkedTokenSource = CancellationTokenSource.CreateLinkedTokenSource(stoppingToken, optionsTokenSource.Token);
await _counterPipeline.RunAsync(linkedTokenSource.Token);
}
catch (Exception e) when(e is not OperationCanceledException || !stoppingToken.IsCancellationRequested)
{
//Most likely we failed to resolve the pid or metric configuration change. Attempt to do this again.
if (_counterPipeline != null)
{
await _counterPipeline.DisposeAsync();
}
await Task.Delay(5000, stoppingToken);
}
}
}
public static EventPipeCounterPipelineSettings CreateSettings(GlobalCounterOptions counterOptions, MetricsOptions options)
{
return(CreateSettings(options.IncludeDefaultProviders.GetValueOrDefault(MetricsOptionsDefaults.IncludeDefaultProviders),
Timeout.Infinite, counterOptions.GetIntervalSeconds(),
() => ConvertCounterGroups(options.Providers)));
}