1 files changed, 51 insertions, 0 deletions
diff --git a/kamon-core/src/main/scala/kamon/metrics/CustomMetric.scala b/kamon-core/src/main/scala/kamon/metrics/CustomMetric.scala
new file mode 100644
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+++ b/kamon-core/src/main/scala/kamon/metrics/CustomMetric.scala
@@ -0,0 +1,51 @@
+/*
+ * =========================================================================================
+ * Copyright © 2013 the kamon project <http://kamon.io/>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the
+ * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+ * either express or implied. See the License for the specific language governing permissions
+ * and limitations under the License.
+ * =========================================================================================
+ */
+
+package kamon.metrics
+
+import kamon.metrics.instruments.ContinuousHighDynamicRangeRecorder
+import org.HdrHistogram.HighDynamicRangeRecorder.Configuration
+import org.HdrHistogram.HighDynamicRangeRecorder
+import com.typesafe.config.Config
+
+case class CustomMetric(name: String) extends MetricGroupIdentity {
+  val category = CustomMetric
+}
+
+object CustomMetric extends MetricGroupCategory {
+  val name = "custom-metric"
+  private val identity = new MetricIdentity { val name, tag = "RecordedValues" }
+
+  def withConfig(highestTrackableValue: Long, significantValueDigits: Int, continuous: Boolean = false) = new MetricGroupFactory {
+    type GroupRecorder = CustomMetricRecorder
+
+    def create(config: Config): CustomMetricRecorder =
+      if (continuous)
+        new CustomMetricRecorder(identity, ContinuousHighDynamicRangeRecorder(Configuration(highestTrackableValue, significantValueDigits)))
+      else
+        new CustomMetricRecorder(identity, HighDynamicRangeRecorder(Configuration(highestTrackableValue, significantValueDigits)))
+  }
+
+  class CustomMetricRecorder(identity: MetricIdentity, underlyingRecorder: HighDynamicRangeRecorder)
+      extends MetricSingleGroupRecorder {
+
+    def collect: MetricGroupSnapshot = new MetricGroupSnapshot {
+      val metrics: Map[MetricIdentity, MetricSnapshot] = Map((identity, underlyingRecorder.collect()))
+    }
+
+    def record(value: Long): Unit = underlyingRecorder.record(value)
+  }
+}