how to delete a java file created from akka streams - scala

Question

I am using akka streams and am following tutorial. The code is trying to delete the created file but it's not getting deleted. I was unable to know which resource is left opened. file.delete() is returning false. the file has the permission of read, write and execute
Here is the example code
final case class FileField(fieldName: String, fileNameF: FileInfo ⇒ File)
final case class PartsAndFiles(form: immutable.Map[String, List[String]], files: immutable.Seq[(FileInfo, File)]) {
final def addForm(fieldName: String, content: String): PartsAndFiles = this.copy(
form = {
val existingContent: List[String] = this.form.getOrElse(fieldName, List.empty)
val newContents: List[String] = content :: existingContent
this.form + (fieldName -> newContents)
}
)
final def addFile(info: FileInfo, file: File): PartsAndFiles = this.copy(
files = this.files :+ ((info, file))
)
}
object PartsAndFiles {
val Empty = PartsAndFiles(immutable.Map.empty, immutable.Seq.empty)
}
def formAndFiles(
fileFields: immutable.Seq[FileField]
): Directive1[PartsAndFiles] = entity(as[Multipart.FormData]).flatMap { formData ⇒
extractRequestContext.flatMap { ctx ⇒
implicit val mat = ctx.materializer
implicit val ec = ctx.executionContext
val uploadingSink =
Sink.foldAsync[PartsAndFiles, Multipart.FormData.BodyPart](PartsAndFiles.Empty) {
(acc, part) ⇒
def discard(p: Multipart.FormData.BodyPart): Future[PartsAndFiles] = {
p.entity.discardBytes()
Future.successful(acc)
}
part.filename.map { fileName ⇒
fileFields.find(_.fieldName == part.name)
.map {
case FileField(fieldName, destFn) ⇒
val fileInfo = FileInfo(part.name, fileName, part.entity.contentType)
val dest = destFn(fileInfo)
part.entity.dataBytes.runWith(FileIO.toPath(dest.toPath)).map { _ ⇒
acc.addFile(fileInfo, dest)
}
}.getOrElse(discard(part))
} getOrElse {
part.entity match {
case HttpEntity.Strict(ct, data) if ct.isInstanceOf[ContentType.NonBinary] ⇒
val charsetName = ct.asInstanceOf[ContentType.NonBinary].charset.nioCharset.name
val partContent = data.decodeString(charsetName)
Future.successful(acc.addForm(part.name, partContent))
case _ ⇒
discard(part)
}
}
}
val uploadedF = formData.parts.runWith(uploadingSink)
onSuccess(uploadedF)
}
}
val fileFields = scala.collection.immutable.Seq(FileField("picture", _ => new File("/tmp/uploaded")))
val routes: Route = formAndFiles(fileFields) {
case PartsAndFiles(fields, files) =>
files.foreach(_._2.delete())
val body = s"""
|File: ${files.head._2.getAbsolutePath}
|Form: ${fields}
""".stripMargin
complete(OK, body)
}
here
files.foreach(_._2.delete())
is returning false
files.foreach(_._2.isExists)
is returning true
i want to delete this file how can i do it ?