CountDownLatch 模拟并发

    @Test
    public void TEST_TX() throws Exception {

        int N = 2;
        CountDownLatch latch = new CountDownLatch(N);
        for (int i = 0; i < N; i++) {
            Thread.sleep(100L);
            new Thread(() -> {
                try {
                    latch.await();
                    System.out.println("---> start " + Thread.currentThread().getName());
                    Thread.sleep(1000L);
                    CourseChapterLiveRecord courseChapterLiveRecord = new CourseChapterLiveRecord();
                    courseChapterLiveRecord.setCourseChapterId(9785454l);
                    courseChapterLiveRecord.setCreateTime(new Date());
                    courseChapterLiveRecord.setRecordEndTime(new Date());
                    courseChapterLiveRecord.setDuration("aaa");
                    courseChapterLiveRecord.setSiteDomain("ada");
                    courseChapterLiveRecord.setRecordId("aaaaaaaaa");
                    courseChapterLiveRecordServiceImpl.saveCourseChapterLiveRecord(courseChapterLiveRecord);
                    System.out.println("---> end " + Thread.currentThread().getName());
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }).start();
            latch.countDown();
        }

    }

参考 （链接：https://juejin.cn/post/6844904005282332685）