聊聊rocketmq的suspendCurrentQueueTimeMillis

public class DefaultMQPushConsumer extends ClientConfig implements MQPushConsumer {
​
    //......
​
    /**
     * Suspending pulling time for cases requiring slow pulling like flow-control scenario.
     */
    private long suspendCurrentQueueTimeMillis = 1000;
​
    public long getSuspendCurrentQueueTimeMillis() {
        return suspendCurrentQueueTimeMillis;
    }
​
    public void setSuspendCurrentQueueTimeMillis(final long suspendCurrentQueueTimeMillis) {
        this.suspendCurrentQueueTimeMillis = suspendCurrentQueueTimeMillis;
    }
​
    //......
}

public class ConsumeMessageOrderlyService implements ConsumeMessageService {
​
    //......
​
    private void submitConsumeRequestLater(
        final ProcessQueue processQueue,
        final MessageQueue messageQueue,
        final long suspendTimeMillis
    ) {
        long timeMillis = suspendTimeMillis;
        if (timeMillis == -1) {
            timeMillis = this.defaultMQPushConsumer.getSuspendCurrentQueueTimeMillis();
        }
​
        if (timeMillis < 10) {
            timeMillis = 10;
        } else if (timeMillis > 30000) {
            timeMillis = 30000;
        }
​
        this.scheduledExecutorService.schedule(new Runnable() {
​
            @Override
            public void run() {
                ConsumeMessageOrderlyService.this.submitConsumeRequest(null, processQueue, messageQueue, true);
            }
        }, timeMillis, TimeUnit.MILLISECONDS);
    }
​
    //......
}