public void flush(){
  try {
    File currentDir=new File(path);
    for (    File f : currentDir.listFiles()) {
      if (f.isDirectory())       FileUtils.deleteDirectory(f);
 else       FileUtils.deleteQuietly(f);
    }
    notifyObservers();
  }
 catch (  Exception e) {
    e.printStackTrace();
  }
}

public void flush ( ) { try { File currentDir = new File ( path ) ; for ( File f : currentDir . listFiles ( ) ) { if ( f . isDirectory ( ) ) FileUtils . deleteDirectory ( f ) ; else FileUtils . deleteQuietly ( f ) ; } notifyObservers ( ) ; } catch ( Exception e ) { e . printStackTrace ( ) ; } }
flush the current wasphash - all the key / values will be removed
