hollow/src/main/java/com/netflix/hollow/api/client/HollowAnnouncementWatcher.java
public void triggerAsyncRefreshWithRandomDelay(int maxDelayMillis) {
        Random rand = new Random();
        int delayMillis = maxDelayMillis > 0 ? rand.nextInt(maxDelayMillis) : 0;
        triggerAsyncRefreshWithDelay(delayMillis);
    }
public void triggerAsyncRefreshWithRandomDelay(int maxDelayMillis) {
        Random rand = new Random();
        int delayMillis = maxDelayMillis > 0 ? rand.nextInt(maxDelayMillis) : 0;
        triggerAsyncRefreshWithDelay(delayMillis);
    }
Triggers async refresh after some random number of milliseconds have passed,
between now and the specified maximum number of milliseconds.

Any subsequent calls for async refresh will not begin until after the specified delay
has completed.

@param maxDelayMillis the maximum delay in milliseconds