public boolean cancel(boolean mayInterruptIfRunning) {
    logger.get().log(FINER, "cancelling {0}", this);
    boolean cancelled = future.cancel(mayInterruptIfRunning);
    if (cancelled) {
      close();
    }
    return cancelled;
  }

  private void close() {
    logger.get().log(FINER, "closing {0}", this);
    closeables.close();
  }

  public boolean cancel(boolean mayInterruptIfRunning) {
    logger.get().log(FINER, "cancelling {0}", this);
    boolean cancelled = future.cancel(mayInterruptIfRunning);
    if (cancelled) {
      close();
    }
    return cancelled;
  }

  private void close() {
    logger.get().log(FINER, "closing {0}", this);
    closeables.close();
  }

            Class.forName("jcifs.smb1.Config");
        } catch (final ClassNotFoundException cnfe) {
            logger.error("Failed to load jcifs.smb1.Config class", cnfe);
        }
        attrExpirationPeriod = Config.getLong("jcifs.smb1.smb.client.attrExpirationPeriod", DEFAULT_ATTR_EXPIRATION_PERIOD);
        ignoreCopyToException = Config.getBoolean("jcifs.smb1.smb.client.ignoreCopyToException", true);
        dfs = new Dfs();
    }