1 files changed, 6 insertions, 6 deletions
diff --git a/kamon-system-metrics/src/main/scala/kamon/system/sigar/FileSystemMetrics.scala b/kamon-system-metrics/src/main/scala/kamon/system/sigar/FileSystemMetrics.scala
index d34b6415..28e40469 100644
--- a/kamon-system-metrics/src/main/scala/kamon/system/sigar/FileSystemMetrics.scala
+++ b/kamon-system-metrics/src/main/scala/kamon/system/sigar/FileSystemMetrics.scala
@@ -5,23 +5,23 @@ import kamon.metric.instrument.{ Memory, InstrumentFactory }
 import org.hyperic.sigar.{ DiskUsage, FileSystem, Sigar }
 import scala.util.Try
 
-class FileSystemMetrics(instrumentFactory: InstrumentFactory) extends GenericEntityRecorder(instrumentFactory) with SigarMetric {
+class FileSystemMetrics(sigar: Sigar, instrumentFactory: InstrumentFactory) extends GenericEntityRecorder(instrumentFactory) with SigarMetric {
   val reads = DiffRecordingHistogram(histogram("file-system-reads", Memory.Bytes))
   val writes = DiffRecordingHistogram(histogram("file-system-writes", Memory.Bytes))
 
+  val fileSystems = sigar.getFileSystemList.filter(_.getType == FileSystem.TYPE_LOCAL_DISK).map(_.getDevName).toSet
+
   def sumOfAllFileSystems(sigar: Sigar, thunk: DiskUsage ⇒ Long): Long = Try {
-    val fileSystems = sigar.getFileSystemList.filter(_.getType == FileSystem.TYPE_LOCAL_DISK).map(_.getDevName).toSet
     fileSystems.map(i ⇒ thunk(sigar.getDiskUsage(i))).fold(0L)(_ + _)
-
   } getOrElse (0L)
 
-  def update(sigar: Sigar): Unit = {
+  def update(): Unit = {
     reads.record(sumOfAllFileSystems(sigar, _.getReadBytes))
     writes.record(sumOfAllFileSystems(sigar, _.getWriteBytes))
   }
 }
 
 object FileSystemMetrics extends SigarMetricRecorderCompanion("file-system") {
-  def apply(instrumentFactory: InstrumentFactory): FileSystemMetrics =
-    new FileSystemMetrics(instrumentFactory)
+  def apply(sigar: Sigar, instrumentFactory: InstrumentFactory): FileSystemMetrics =
+    new FileSystemMetrics(sigar, instrumentFactory)
 }