Scala example source code file (ShutdownHookThread.scala)

This example Scala source code file (ShutdownHookThread.scala) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Scala source code examples by using tags.

All credit for the original source code belongs to scala-lang.org; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Scala tags/keywords

int, shutdownhookthread, string, thread, unit

The ShutdownHookThread.scala Scala example source code

/*                     __                                               *\
**     ________ ___   / /  ___     Scala API                            **
**    / __/ __// _ | / /  / _ |    (c) 2003-2013, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */

package scala
package sys

/** A minimal Thread wrapper to enhance shutdown hooks.  It knows
 *  how to unregister itself.
 *
 *  @author Paul Phillips
 *  @version 2.9
 *  @since   2.9
 */
class ShutdownHookThread private (name: String) extends Thread(name) {
  def remove() = runtime removeShutdownHook this
}

object ShutdownHookThread {
  private var hookNameCount: Int = 0
  private def hookName(): String = synchronized {
    hookNameCount += 1
    "shutdownHook" + hookNameCount
  }
  /** Creates, names, and registers a shutdown hook to run the
   *  given code.
   */
  def apply(body: => Unit): ShutdownHookThread = {
    val t = new ShutdownHookThread(hookName()) {
      override def run() = body
    }
    runtime addShutdownHook t
    t
  }
}