Use of DynamicVariable

dynamic-variable.scala

val dyn = new DynamicVariable[Int](0)

new Thread(new Runnable() {
  def run() {
    dyn.withValue(10) { doSomething }
  }
}, "thread-1").start()

new Thread(new Runnable() {
  def run() {
    dyn.withValue(20) { doSomething }
  }
}, "thread-2").start()

def doSomething() {
  println { 
    Thread.currentThread().getName() + 
      "  " + dyn.value 
  }
}