Groovy pollozó megoldás

 def job = {
   String pomPath = /-f <full path to pom>\pom.xml/
   String  command = /<full path to maven home>\bin\mvn.bat test /
   String fullCommand = command+pomPath
   println "Executing "+command
   def proc = fullCommand.execute()
   proc.waitForProcessOutput(System.out, System.err)
 }
 
params =  [
  closure: job,
  sleepInterval: 1000,
  dirPath: /<path to dir to monitor>\src/
]

import groovy.transform.Canonical;

@Canonical
class AutoRunner{
  def closure
  def sleepInterval = 3000
  // running for 8 hours then stop automatically if checking every 3 seconds
  def nrOfRepeat = 9600 
  def dirPath = "."
  long lastModified = 0

  def autorun(){
    println "Press CTRL+C to stop..."
    println this
    def to_run = {
      while(nrOfRepeat--){
        sleep(sleepInterval)
        if(anyChange()){
          closure()
        }
      }
    } as Runnable
    Thread runner = new Thread(to_run)
    runner.start()
  }
  
  def boolean anyChange(){
    def max = lastModified
    new File(dirPath).eachFileRecurse {
      if(it.lastModified() > max){
        max = it.lastModified()
      }
    }
    if(max > lastModified){
      lastModified = max
      return true
    }
    return false;
  }
}

new AutoRunner(params).autorun()

 import groovy.io.FileType
 long lastModified = 0
 File dir = new File('./content')
 while (true){
   long max = 0;
   dir.eachFileRecurse (FileType.FILES) { file ->
     if(max < file.lastModified())
       max = file.lastModified()
   }
  if(lastModified < max){
    recompile()
    lastModified = max
  }
  Thread.sleep(3000)
}

def recompile(){
  println  "recompile ${new Date()}"
  def proc = "c:\\environment\\apps\\ruby-1.9.3\\bin\\nanoc.bat  compile".execute()
  println proc.text
}