play-ping-page.scala

  def ping-me() = Action { implicit request =>
    Ok(osusage)
  }
  
  def osusage = {
    var s = ""
    val osm: OperatingSystemMXBean = ManagementFactory.getOperatingSystemMXBean();
    for (method <- osm.getClass().getDeclaredMethods()) {
      method.setAccessible(true);
      if (method.getName().startsWith("get") && Modifier.isPublic(method.getModifiers())) {
        val v = try {
          method.invoke(osm).toString;
        } catch {
          case e: Exception => e.toString
        } // try
        val vn = try {
          v.toLong
        } catch {
          case e: Exception => -1
        } // try
        s = s + (method.getName() -> (if(vn == -1) v else (nice(vn) + " - "+v))) + "\n";
      } // if
    } // for
    // add Play request monitoring data
    s"""$s\n
Global.serving=${GlobalData.serving}\n
Global.served=${GlobalData.served}\n
Global.startedDtm=${GlobalData.startedDtm}\n
"""
  }

  private def nice(l: Long) =
    if (l > 2L*(1024L*1024L*1024L))
      l / (1024L*1024L*1024L) + "G"
    else if (l > 2*(1024L*1024L))
      l / (1024L*1024L) + "M"
    else if (l > 1024)
      l / 1024 + "K"
    else 
      l.toString