1 files changed, 28 insertions, 0 deletions
diff --git a/kamon-system-metrics/src/main/scala/kamon/system/jmx/ClassLoadingMetrics.scala b/kamon-system-metrics/src/main/scala/kamon/system/jmx/ClassLoadingMetrics.scala
new file mode 100644
index 00000000..d9379738
--- /dev/null
+++ b/kamon-system-metrics/src/main/scala/kamon/system/jmx/ClassLoadingMetrics.scala
@@ -0,0 +1,28 @@
+package kamon.system.jmx
+
+import java.lang.management.ManagementFactory
+
+import kamon.metric.GenericEntityRecorder
+import kamon.metric.instrument.{ Memory, InstrumentFactory }
+
+class ClassLoadingMetrics(instrumentFactory: InstrumentFactory) extends GenericEntityRecorder(instrumentFactory) {
+  val classLoadingBean = ManagementFactory.getClassLoadingMXBean
+
+  gauge("classes-loaded", Memory.Bytes, () ⇒ {
+    classLoadingBean.getTotalLoadedClassCount
+  })
+
+  gauge("classes-unloaded", Memory.Bytes, () ⇒ {
+    classLoadingBean.getUnloadedClassCount
+  })
+
+  gauge("classes-currently-loaded", Memory.Bytes, () ⇒ {
+    classLoadingBean.getLoadedClassCount.toLong
+  })
+
+}
+
+object ClassLoadingMetrics extends JmxSystemMetricRecorderCompanion("class-loading") {
+  def apply(instrumentFactory: InstrumentFactory): ClassLoadingMetrics =
+    new ClassLoadingMetrics(instrumentFactory)
+}