support for custom metrics

1 files changed, 9 insertions, 2 deletions

diff --git a/kamon-core/src/main/scala/kamon/metrics/Metrics.scala b/kamon-core/src/main/scala/kamon/metrics/Metrics.scala
index 81475d52..f7ee833b 100644
--- a/kamon-core/src/main/scala/kamon/metrics/Metrics.scala
+++ b/kamon-core/src/main/scala/kamon/metrics/Metrics.scala
@@ -34,11 +34,18 @@ trait MetricIdentity {
   def tag: String
 }
 
-trait MetricGroupRecorder {
-  def record(identity: MetricIdentity, value: Long)
+sealed trait MetricGroupRecorder {
   def collect: MetricGroupSnapshot
 }
 
+trait MetricMultiGroupRecorder extends MetricGroupRecorder {
+  def record(identity: MetricIdentity, value: Long)
+}
+
+trait MetricSingleGroupRecorder extends MetricGroupRecorder {
+  def record(value: Long)
+}
+
 trait MetricGroupSnapshot {
   def metrics: Map[MetricIdentity, MetricSnapshot]
 }