Some questions from the official Order Message Example of rocketmq?

problem description

there is a doubt about the example code of learning rocketmq on the official website. The link: http://rocketmq.apache.org/do... is the result of multiple if judgments in Subscription message sample code. What exactly does it mean?

related codes

/ / Please paste the code text below (do not replace the code with pictures)
consumer.registerMessageListener (new MessageListenerOrderly () {

)

        AtomicLong consumeTimes = new AtomicLong(0);
        @Override
        public ConsumeOrderlyStatus consumeMessage(List<MessageExt> msgs,
                                                   ConsumeOrderlyContext context) {
            context.setAutoCommit(false);
            System.out.printf(Thread.currentThread().getName() + " Receive New Messages: " + msgs + "%n");
            this.consumeTimes.incrementAndGet();
            if ((this.consumeTimes.get() % 2) == 0) {
                return ConsumeOrderlyStatus.SUCCESS;
            } else if ((this.consumeTimes.get() % 3) == 0) {
                return ConsumeOrderlyStatus.ROLLBACK;
            } else if ((this.consumeTimes.get() % 4) == 0) {
                return ConsumeOrderlyStatus.COMMIT;
            } else if ((this.consumeTimes.get() % 5) == 0) {
                context.setSuspendCurrentQueueTimeMillis(3000);
                return ConsumeOrderlyStatus.SUSPEND_CURRENT_QUEUE_A_MOMENT;
            }
            return ConsumeOrderlyStatus.SUCCESS;

        }
    });

what result do you expect? What is the error message actually seen?

ask Daniel to explain what those if values are supposed to mean. After watching it for a long time, I really don"t understand. Thank you!