1 files changed, 29 insertions, 0 deletions
diff --git a/kamon-system-metrics/src/main/scala/kamon/system/jmx/HeapMemoryMetrics.scala b/kamon-system-metrics/src/main/scala/kamon/system/jmx/HeapMemoryMetrics.scala
new file mode 100644
index 00000000..a96b5319
--- /dev/null
+++ b/kamon-system-metrics/src/main/scala/kamon/system/jmx/HeapMemoryMetrics.scala
@@ -0,0 +1,29 @@
+package kamon.system.jmx
+
+import java.lang.management.ManagementFactory
+
+import kamon.metric.GenericEntityRecorder
+import kamon.metric.instrument.{ Memory, InstrumentFactory }
+
+class HeapMemoryMetrics(instrumentFactory: InstrumentFactory) extends GenericEntityRecorder(instrumentFactory) {
+  val memoryBean = ManagementFactory.getMemoryMXBean
+  def nonHeapUsage = memoryBean.getHeapMemoryUsage
+
+  gauge("heap-used", Memory.Bytes, () ⇒ {
+    nonHeapUsage.getUsed
+  })
+
+  gauge("heap-max", Memory.Bytes, () ⇒ {
+    nonHeapUsage.getMax
+  })
+
+  gauge("heap-committed", Memory.Bytes, () ⇒ {
+    nonHeapUsage.getCommitted
+  })
+
+}
+
+object HeapMemoryMetrics extends JmxSystemMetricRecorderCompanion("heap-memory") {
+  def apply(instrumentFactory: InstrumentFactory): HeapMemoryMetrics =
+    new HeapMemoryMetrics(instrumentFactory)
+}