format source with scalafmt

akka-cluster-metrics/src/main/scala/akka/cluster/metrics/ClusterMetricsCollector.scala

@@ -26,6 +26,7 @@ sealed abstract class CollectionControlMessage extends Serializable
  */
 @SerialVersionUID(1L)
 case object CollectionStartMessage extends CollectionControlMessage {
+
   /** Java API */
   def getInstance = CollectionStartMessage
 }
@@ -35,6 +36,7 @@ case object CollectionStartMessage extends CollectionControlMessage {
  */
 @SerialVersionUID(1L)
 case object CollectionStopMessage extends CollectionControlMessage {
+
   /** Java API */
   def getInstance = CollectionStopMessage
 }
@@ -59,7 +61,8 @@ private[metrics] class ClusterMetricsSupervisor extends Actor with ActorLogging
     if (CollectorEnabled) {
       self ! CollectionStartMessage
     } else {
-      log.warning(s"Metrics collection is disabled in configuration. Use subtypes of ${classOf[CollectionControlMessage].getName} to manage collection at runtime.")
+      log.warning(
+        s"Metrics collection is disabled in configuration. Use subtypes of ${classOf[CollectionControlMessage].getName} to manage collection at runtime.")
     }
   }
 
@@ -87,6 +90,7 @@ trait ClusterMetricsEvent
  * Current snapshot of cluster node metrics.
  */
 final case class ClusterMetricsChanged(nodeMetrics: Set[NodeMetrics]) extends ClusterMetricsEvent {
+
   /** Java API */
   def getNodeMetrics: java.lang.Iterable[NodeMetrics] =
     scala.collection.JavaConverters.asJavaIterableConverter(nodeMetrics).asJava
@@ -107,8 +111,9 @@ private[metrics] trait ClusterMetricsMessage extends Serializable
  * Envelope adding a sender address to the cluster metrics gossip.
  */
 @SerialVersionUID(1L)
-private[metrics] final case class MetricsGossipEnvelope(from: Address, gossip: MetricsGossip, reply: Boolean) extends ClusterMetricsMessage
-  with DeadLetterSuppression
+private[metrics] final case class MetricsGossipEnvelope(from: Address, gossip: MetricsGossip, reply: Boolean)
+    extends ClusterMetricsMessage
+    with DeadLetterSuppression
 
 /**
  * INTERNAL API.
@@ -129,7 +134,7 @@ private[metrics] class ClusterMetricsCollector extends Actor with ActorLogging {
   import Member.addressOrdering
   import context.dispatcher
   val cluster = Cluster(context.system)
-  import cluster.{ selfAddress, scheduler }
+  import cluster.{ scheduler, selfAddress }
   import cluster.ClusterLogger._
   val metrics = ClusterMetricsExtension(context.system)
   import metrics.settings._
@@ -152,16 +157,16 @@ private[metrics] class ClusterMetricsCollector extends Actor with ActorLogging {
   /**
    * Start periodic gossip to random nodes in cluster
    */
-  val gossipTask = scheduler.schedule(
-    PeriodicTasksInitialDelay max CollectorGossipInterval,
-    CollectorGossipInterval, self, GossipTick)
+  val gossipTask =
+    scheduler.schedule(PeriodicTasksInitialDelay max CollectorGossipInterval, CollectorGossipInterval, self, GossipTick)
 
   /**
    * Start periodic metrics collection
    */
-  val sampleTask = scheduler.schedule(
-    PeriodicTasksInitialDelay max CollectorSampleInterval,
-    CollectorSampleInterval, self, MetricsTick)
+  val sampleTask = scheduler.schedule(PeriodicTasksInitialDelay max CollectorSampleInterval,
+                                      CollectorSampleInterval,
+                                      self,
+                                      MetricsTick)
 
   override def preStart(): Unit = {
     cluster.subscribe(self, classOf[MemberEvent], classOf[ReachabilityEvent])
@@ -186,7 +191,7 @@ private[metrics] class ClusterMetricsCollector extends Actor with ActorLogging {
   }
 
   override def postStop: Unit = {
-    cluster unsubscribe self
+    cluster.unsubscribe(self)
     gossipTask.cancel()
     sampleTask.cancel()
     collector.close()
@@ -202,7 +207,7 @@ private[metrics] class ClusterMetricsCollector extends Actor with ActorLogging {
    */
   def removeMember(member: Member): Unit = {
     nodes -= member.address
-    latestGossip = latestGossip remove member.address
+    latestGossip = latestGossip.remove(member.address)
     publish()
   }
 
@@ -210,7 +215,7 @@ private[metrics] class ClusterMetricsCollector extends Actor with ActorLogging {
    * Updates the initial node ring for those nodes that are [[akka.cluster.MemberStatus]] `Up`.
    */
   def receiveState(state: CurrentClusterState): Unit =
-    nodes = (state.members diff state.unreachable) collect {
+    nodes = (state.members.diff(state.unreachable)).collect {
       case m if m.status == MemberStatus.Up || m.status == MemberStatus.WeaklyUp => m.address
     }
 
@@ -233,7 +238,7 @@ private[metrics] class ClusterMetricsCollector extends Actor with ActorLogging {
     // remote node might not have same view of member nodes, this side should only care
     // about nodes that are known here, otherwise removed nodes can come back
     val otherGossip = envelope.gossip.filter(nodes)
-    latestGossip = latestGossip merge otherGossip
+    latestGossip = latestGossip.merge(otherGossip)
     // changes will be published in the period collect task
     if (!envelope.reply)
       replyGossipTo(envelope.from)
@@ -242,7 +247,7 @@ private[metrics] class ClusterMetricsCollector extends Actor with ActorLogging {
   /**
    * Gossip to peer nodes.
    */
-  def gossip(): Unit = selectRandomNode((nodes - selfAddress).toVector) foreach gossipTo
+  def gossip(): Unit = selectRandomNode((nodes - selfAddress).toVector).foreach(gossipTo)
 
   def gossipTo(address: Address): Unit =
     sendGossip(address, MetricsGossipEnvelope(selfAddress, latestGossip, reply = false))
@@ -254,11 +259,11 @@ private[metrics] class ClusterMetricsCollector extends Actor with ActorLogging {
     context.actorSelection(self.path.toStringWithAddress(address)) ! envelope
 
   def selectRandomNode(addresses: immutable.IndexedSeq[Address]): Option[Address] =
-    if (addresses.isEmpty) None else Some(addresses(ThreadLocalRandom.current nextInt addresses.size))
+    if (addresses.isEmpty) None else Some(addresses(ThreadLocalRandom.current.nextInt(addresses.size)))
 
   /**
    * Publishes to the event stream.
    */
-  def publish(): Unit = context.system.eventStream publish ClusterMetricsChanged(latestGossip.nodes)
+  def publish(): Unit = context.system.eventStream.publish(ClusterMetricsChanged(latestGossip.nodes))
 
 }