Scala finally block closing/flushing resource

Question

Is there a better way to ensure resources are properly released - a better way to write the following code ?

        val out: Option[FileOutputStream] = try         


        

Answer 1

Alternatively you can do this with Choppy's Lazy TryClose monad.

val output = for {
  fin   <- TryClose(in)
  fout  <- TryClose.wrapWithCloser(new FileOutputStream(path))(out => {out.flush(); out.close();})
} yield wrap(Iterator.continually(fin.read).takeWhile(-1 != _).foreach(fout.get.write))

// Then execute it like this:
output.resolve

More info here: https://github.com/choppythelumberjack/tryclose

(just be sure to import tryclose._ and tryclose.JavaImplicits._)