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• OnShutdown.scala

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im.yagni.common.OnShutdown.scala Maven / Gradle / Ivy

package im.yagni.common

import collection.mutable.ListBuffer

case class ShutdownFunction(message: String, function: () => Unit)

object OnShutdown {
  private val shutdownFunctions = new ListBuffer[ShutdownFunction]
  
  def execute(message: String, function: () => Unit) {
    shutdownFunctions.append(new ShutdownFunction(message, function))
  }
  
  Runtime.getRuntime addShutdownHook new Thread {
    override def run() {
      println("### Executing shutdowns: " + shutdownFunctions.map(_.message).mkString(", ") )

      shutdownFunctions.foreach(f => {
        try { f.function() }
        finally { println("### Finished shutdown: " + f.message) }
      }
    )}
  }
}