static int cleanJavaXCache_msgInterval = 1000;

static void cleanJavaXCache(int retentionHours, bool verbose) {
  pcall {
    if (verbose)
      System.out.println("Cleaning JavaX Cache (" + retentionHours + " hours retention time)");
    int fileDeletions = 0;
    File javax = new File(userHome(), ".javax");
    long now = now(), msgPrinted = now();
    File[] files = javax.listFiles();
    int scanned = 0, deleted = 0;
    if (files != null) for (File dir : files) {
      ++scanned;
      if (now() >= msgPrinted+cleanJavaXCache_msgInterval) {
        print("Cleaning cache (" + scanned + "/" + n(files, "dir") + " scanned, " + deleted + " deleted)...");
        msgPrinted = now();
      }
      if (dir.isDirectory() && Pattern.compile("\\d+").matcher(dir.getName()).matches()) {
        long time = Long.parseLong(dir.getName());
        long seconds = (now - time) / 1000;
        long minutes = seconds / 60;
        long hours = minutes / 60;
        if (hours >= retentionHours) {
          //System.out.println("Can delete " + dir.getAbsolutePath() + ", age: " + hours + " h");
          fileDeletions += cleanJavaXCache_removeDir(dir, verbose);
          ++deleted;
        }
      }
    }
    if (verbose && fileDeletions != 0)
      print("Cleaned cache. File deletions: " + fileDeletions);
  }
}

static int cleanJavaXCache_removeDir(File dir, bool verbose) {
  int fileDeletions = 0;
  if (dir == null) ret fileDeletions;
  if (dir.getAbsolutePath().indexOf(".javax") < 0)  // security check!
    fail("WHAT ARE YOU DOING!? >> " + dir.getAbsolutePath());
  for (File f : dir.listFiles()) {
    if (f.isDirectory())
      cleanJavaXCache_removeDir(f, verbose);
    else {
      if (verbose)
        print("Deleting " + f.getAbsolutePath());
      f.delete();
      ++fileDeletions;
    }
  }
  dir.delete();
  ret fileDeletions;
}