Simple Scala pattern for “using/try-with-resources” (Automatic Resource Management)

Question

C# has using with the IDisposable interface. Java 7+ has identical functionality with try and the AutoCloseable interface

Answer 1

Choppy's Lazy TryClose monad might be what you are looking for (disclosure: I'm the author). It is very similar to Scala's Try but automatically closes resources automatically.

val ds = new JdbcDataSource()
val output = for {
  conn  <- TryClose(ds.getConnection())
  ps    <- TryClose(conn.prepareStatement("select * from MyTable"))
  rs    <- TryClose.wrap(ps.executeQuery())
} yield wrap(extractResult(rs))

// Note that Nothing will actually be done until 'resolve' is called
output.resolve match {
    case Success(result) => // Do something
    case Failure(e) =>      // Handle Stuff
}

See here for more info: https://github.com/choppythelumberjack/tryclose