make MissingElements private again

Author: jtjeferreira

core/src/main/scala/akka/persistence/jdbc/query/JournalSequenceActor.scala

@@ -38,15 +38,15 @@ object JournalSequenceActor {
    * Efficient representation of missing elements using NumericRanges.
    * It can be seen as a collection of OrderingIds
    */
-  case class MissingElements(elements: Seq[NumericRange[OrderingId]]) {
+  private case class MissingElements(elements: Seq[NumericRange[OrderingId]]) {
     def addRange(from: OrderingId, until: OrderingId): MissingElements = {
       val newRange = from.until(until)
       MissingElements(elements :+ newRange)
     }
     def contains(id: OrderingId): Boolean = elements.exists(_.containsTyped(id))
     def isEmpty: Boolean = elements.forall(_.isEmpty)
   }
-  object MissingElements {
+  private object MissingElements {
     def empty: MissingElements = MissingElements(Vector.empty)
   }
 }
@@ -84,7 +84,7 @@ class JournalSequenceActor(readJournalDao: ReadJournalDao, config: JournalSequen
    * @param moduloCounter A counter which is incremented every time a new query have been executed, modulo `maxTries`
    * @param previousDelay The last used delay (may change in case failures occur)
    */
-  def receive(
+  private def receive(
       currentMaxOrdering: OrderingId,
       missingByCounter: Map[Int, MissingElements],
       moduloCounter: Int,
@@ -129,7 +129,7 @@ class JournalSequenceActor(readJournalDao: ReadJournalDao, config: JournalSequen
   /**
    * This method that implements the "find gaps" algo. It's the meat and main purpose of this actor.
    */
-  def findGaps(
+  private def findGaps(
       elements: Seq[OrderingId],
       currentMaxOrdering: OrderingId,
       missingByCounter: Map[Int, MissingElements],