public override void AddMetricStats(Segment segment, TimeSpan durationOfChildren, TransactionMetricStatsCollection txStats, IConfigurationService configService)
{
var duration = segment.Duration.Value;
var exclusiveDuration = TimeSpanMath.Max(TimeSpan.Zero, duration - durationOfChildren);
MetricBuilder.TryBuildExternalRollupMetrics(Uri.Host, duration, txStats);
// The CAT response data will be null if the agent did not receive a response that contained CAT headers (e.g. if the request went to an app that isn't monitored by a supported New Relic agent).
// According to the agent spec, in the event when CAT response data is present, the agent generates ExternalTransaction/{host}/{cross_process_id}/{transaction_name} scoped metric to replace External/{host}/{method} scoped metric.
if (CrossApplicationResponseData == null)
{
// Generate scoped and unscoped external metrics as CAT not present.
MetricBuilder.TryBuildExternalSegmentMetric(Uri.Host, Method, duration, exclusiveDuration, txStats, false);
}
else
{
// Only generate unscoped metric for response with CAT headers because segments should only produce a single scoped metric and the CAT metric is more interesting than the external segment metric.
MetricBuilder.TryBuildExternalSegmentMetric(Uri.Host, Method, duration, exclusiveDuration, txStats, true);
var externalCrossProcessId = CrossApplicationResponseData.CrossProcessId;
var externalTransactionName = CrossApplicationResponseData.TransactionName;
MetricBuilder.TryBuildExternalAppMetric(Uri.Host, externalCrossProcessId, exclusiveDuration, txStats);
MetricBuilder.TryBuildExternalTransactionMetric(Uri.Host, externalCrossProcessId, externalTransactionName, duration, exclusiveDuration, txStats);
}
}