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

Your approach with a single simple loan pattern is working fine as long as you don't need to work with several resources, all needing to be managed. That's allowed with scala-arm monadic approach.

import resource.managed

managed(openResA).and(managed(openResB)) acquireFor { (a, b) => ??? }

val res = for {
  a <- managed(openResA)
  b <- managed(openResB)
  c <- managed(openResC)
} yield (a, b, c)

res acquireAndGet {
  case (a, b, c) => ???
}

Main functions to know in scala-arm is resource.managed and .acquired{For,AndGet}, not really complex btw.