/// <inheritdoc />
public IMetricsRoot Build()
{
IMetricsRegistry registry = new NullMetricsRegistry();
if (_options == null)
{
_options = new MetricsOptions();
}
if (_metricFields == null)
{
_metricFields = new MetricFields();
}
if (_options.Enabled)
{
registry = new DefaultMetricsRegistry(_options.DefaultContextLabel, _clock, ContextRegistry);
}
if (_metricsOutputFormatters.Count == 0)
{
_metricsOutputFormatters.Add(new MetricsTextOutputFormatter(_metricFields));
}
else
{
foreach (var metricsOutputFormatter in _metricsOutputFormatters)
{
if (metricsOutputFormatter.MetricFields == null)
{
metricsOutputFormatter.MetricFields = _metricFields;
}
}
}
if (_reporters != null && _reporters.Any())
{
foreach (var reporter in _reporters)
{
if (reporter.Formatter != null && reporter.Formatter.MetricFields == null)
{
reporter.Formatter.MetricFields = _metricFields;
}
}
}
if (_envFormatters.Count == 0)
{
_envFormatters.Add(new EnvInfoTextOutputFormatter());
}
var builderFactory = new DefaultMetricsBuilderFactory(_defaultSamplingReservoir);
var measure = new DefaultMeasureMetricsProvider(registry, builderFactory, _clock);
var provider = new DefaultMetricsProvider(registry, builderFactory, _clock);
var snapshot = new DefaultMetricValuesProvider(_metricsFilter, registry);
var manage = new DefaultMetricsManager(registry);
var metrics = new DefaultMetrics(_clock, _metricsFilter, measure, builderFactory, provider, snapshot, manage);
var defaultMetricsOutputFormatter = _defaultMetricsOutputFormatter ?? _metricsOutputFormatters.FirstOrDefault();
var defaultEnvOutputFormatter = _defauEnvOutputFormatter ?? _envFormatters.FirstOrDefault();
if (CanReport())
{
_metricsReportRunner = new DefaultMetricsReportRunner(metrics, _reporters);
}
return(new MetricsRoot(
metrics,
_options,
_metricsOutputFormatters,
_envFormatters,
defaultMetricsOutputFormatter,
defaultEnvOutputFormatter,
_environmentInfoProvider,
_reporters,
_metricsReportRunner));
IMetricContextRegistry ContextRegistry(string context) =>
new DefaultMetricContextRegistry(context, new GlobalMetricTags(_options.GlobalTags));
}
private bool CanReport()
{
return(_options.Enabled && _options.ReportingEnabled && _reporters.Any());
}