BeanPropertySqlParameterSourceNotThread.java

public class BeanPropertySqlParameterSourceNotThreadSafeTest {
    @Test
    public void test() throws InterruptedException {
        BeanPropertySqlParameterSource sps = new BeanPropertySqlParameterSource(new ImmutableClass());
        Thread[] threads = new Thread[1000];
        CountDownLatch latch = new CountDownLatch(1000);
        for (int i = 0; i < 1000; i++) {
            Thread th = new TestThread(latch, sps);
            threads[i] = th;
            th.start();
            latch.countDown();
        }
        for(Thread th : threads) {
            th.join();
        }
    }

    private static class TestThread extends Thread {
        private final CountDownLatch latch;
        private final BeanPropertySqlParameterSource sps;

        private TestThread(CountDownLatch latch, BeanPropertySqlParameterSource sps) {
            this.latch = latch;
            this.sps = sps;
        }

        @Override
        public void run() {
            try {
                latch.await();
                sps.getValue("date");
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

    private static class ImmutableClass {
        private final Date date = new Date();

        public Date getDate() {
            return date;
        }
    }
}