@Test
public void testPutToConcurrentMap() throws Exception {

    final ConcurrentMap<String, AtomicInteger> hashMap = new ConcurrentHashMap<String, AtomicInteger>();
    final CountDownLatch latch = new CountDownLatch(3);
    for (int i = 0; i < 3; i++) {
        Thread thread = new Thread(new Runnable() {
            @Override
            public void run() {
                for (int j = 0; j < 10000; j++) {
                    AtomicInteger inter = CommonUtils.putToConcurrentMap(hashMap, "key", new AtomicInteger(0));
                    inter.incrementAndGet();
                }
                latch.countDown();
            }
        });
        thread.start();
    }
    latch.await();
    Assert.assertEquals(hashMap.get("key").get(), 30000);
}