code: @Reqiured
      public void setDumpDirectory(String dumpDirectory) {
          if (dumpDirectory != null && dumpDirectory.trim().length() > 0) {
              File file = new File(dumpDirectory);
              if (file.exists() || file.mkdirs()) {
                  this.dumpDirectory = file;
              }
          }
      }
docs: httl.properties: dump.directory=/tmp/dump