BUG in ByteBuffer clear (java 8)

Author: sfxcode

.travis.yml

@@ -16,3 +16,5 @@ notifications:
       - [email protected]
 jdk:
   - openjdk11
+  - oraclejdk8
+

src/main/scala/com/sfxcode/nosql/mongo/gridfs/GridFSStreamObserver.scala

@@ -1,21 +1,21 @@
 package com.sfxcode.nosql.mongo.gridfs
 
 import java.io.OutputStream
-import java.nio.ByteBuffer
+import java.nio.{ Buffer, ByteBuffer }
 import java.util.concurrent.atomic.{ AtomicBoolean, AtomicInteger, AtomicLong }
 
 import com.typesafe.scalalogging.LazyLogging
 import org.mongodb.scala.Observer
 
 case class GridFSStreamObserver(outputStream: OutputStream) extends Observer[ByteBuffer] with LazyLogging {
-  val completed = new AtomicBoolean(false)
+  val completed    = new AtomicBoolean(false)
   val resultLength = new AtomicLong(0)
 
   override def onNext(buffer: ByteBuffer): Unit = {
     val bytes = new Array[Byte](buffer.remaining())
     resultLength.set(resultLength.get() + bytes.length)
     buffer.get(bytes, 0, bytes.length)
-    buffer.clear()
+    buffer.asInstanceOf[Buffer].clear()
     outputStream.write(bytes)
   }
 

src/test/scala/com/sfxcode/nosql/mongo/gridfs/GridfsDatabaseFunctions.scala

@@ -29,14 +29,13 @@ trait GridfsDatabaseFunctions {
   }
 
   def downloadImage(id: ObjectId, path: String): Unit = {
-    val file       = File(path)
-    val start      = System.currentTimeMillis()
+    val file = File(path)
+    val start = System.currentTimeMillis()
     val size: Long = ImageFilesDAO.downloadToStream(id, file.newOutputStream)
 
     println(
       "file: %s with size %s Bytes written in %s ms "
-        .format(file.pathAsString, size, System.currentTimeMillis() - start)
-    )
+        .format(file.pathAsString, size, System.currentTimeMillis() - start))
   }
 
   def findImage(id: ObjectId): GridFSFile = ImageFilesDAO.findById(id)