RocketMQ---控制Broker心跳时间在10到60秒

From：
BrokerController start()

 this.scheduledExecutorService.scheduleAtFixedRate(new Runnable() {

            @Override
            public void run() {
                try {
                    BrokerController.this.registerBrokerAll(true, false, brokerConfig.isForceRegister());
                } catch (Throwable e) {
                    log.error("registerBrokerAll Exception", e);
                }
            }
        }, 1000 * 10, Math.max(10000, Math.min(brokerConfig.getRegisterNameServerPeriod(), 60000)), TimeUnit.MILLISECONDS);

Math.max(10000, Math.min(brokerConfig.getRegisterNameServerPeriod(), 60000))

上面这一句直接控制了中间的自定义值的范围，避免了大量的if判断