public void watcherStart(final String selectKey) {
        this.running.compareAndSet(false, true);
        if (!watchSelectKeySet.add(selectKey)) {
            return;
        }
        watchFutures.add(this.executor.scheduleWithFixedDelay(() -> this.watchConfigKeyValues(selectKey),
                5, Integer.parseInt(watchDelay), TimeUnit.SECONDS));
    }
async to watch data change.

@param selectKey selectKey
shenyu-registry/shenyu-registry-consul/src/main/java/org/apache/shenyu/registry/consul/ConsulInstanceRegisterRepository.java