scala定时器：监测一个目录文件及文件夹的增删改查

import org.apache.commons.io.monitor.{FileAlterationObserver, FileAlterationListener, FileAlterationMonitor}
import java.io.File

class FileMonitor {
  var monitor: FileAlterationMonitor = null


  def this(interval: Long) = {
    this
    this.monitor = new FileAlterationMonitor(interval)
  }


  def monitors(path: String, listener: FileAlterationListener) = {
    try {
      //val observer: FileAlterationObserver = new FileAlterationObserver(new File(path))
      val filePath = new File(path)
      log.info("filePath.exists()===="+filePath.exists())
      val RealFilePath=if(filePath.exists())filePath else new File("./aaa/")
      val observer: FileAlterationObserver = new FileAlterationObserver(RealFilePath)




    /*  val observer: FileAlterationObserver = filePath.exists() match {
        case true =>  new FileAlterationObserver(filePath)
        case false =>
      }*/
      monitor.addObserver(observer)
      observer.addListener(listener)
    } catch {
      case e: Exception =>
        val msg = "monitor failure" + {
          e.getMessage
        }
        log.error(msg, e)
    }
  }


  def stop() = {
    try {
      monitor.stop()
    } catch {
      case e: Exception =>
        val msg = "stop failure" + {
          e.getMessage
        }
        log.error(msg, e)
    }
  }


  def start() = {
    try {
      monitor.start()
    } catch {
      case e: Exception =>
        val msg = "start failure" + {
          e.getMessage
        }
        log.error(msg, e)
    }
  }

}

import org.apache.commons.io.monitor.{FileAlterationObserver, FileAlterationListener}
import java.io.File


class FileListener extends FileAlterationListener with LogSupport {
  val monitor: FileMonitor = null


  override def onStop(p1: FileAlterationObserver) = {
  }


  override def onFileDelete(directory: File) = {

println("onFileChange" + directory.getName)
  }


  override def onFileChange(directory: File) = {
    println("onFileChange" + directory.getName)
  }


  override def onFileCreate(p1: File) = {
    println("onFileCreate" + p1.getName)
  }


  override def onDirectoryDelete(p1: File) = {
    println("onDirectoryDelete" + p1.getName)
  }


  override def onDirectoryChange(p1: File) = {
    println("onDirectoryChange" + p1.getName)
  }


  override def onDirectoryCreate(p1: File) = {
    println("onDirectoryCreate" + p1.getName)
  }


  override def onStart(p1: FileAlterationObserver) = {
  }

}

object RealTimeMonitor  {
 val sysOS = Try(System.getProperty("os.name").toLowerCase).getOrElse("linux")


  def isWindows = sysOS.contains("window")


 val filePath = if(sysOS.contains("window")){
   ".\\aa\\"
 } else {
   "./aaaaa/"
 }


  val m: FileMonitor = new FileMonitor(60000)
  m.monitors(filePath, new FileListener())
  m.start()

}