if ( this.executor != null ) {
            this.executor.shutdown();
            if ( this.future != null ) {
                this.future.cancel(true);
            }
            this.executor.awaitTermination(1, TimeUnit.SECONDS);
        }
        if ( this.base != null ) {
            this.base.delete();
        }
        super.tearDown();
    }

        this.executor = Executors.newCachedThreadPool();
    }


    @After
    @Override
    public void tearDown () throws Exception {
        this.executor.shutdown();
        this.executor.awaitTermination(10, TimeUnit.SECONDS);
        super.tearDown();
    }


    @Test
    public void testExclusiveLock () throws InterruptedException, MalformedURLException, UnknownHostException {