public void watchConfigKeyValues(final String selectKey) {
        if (!running.get()) {
            return;
        }
        final List<InstanceEntity> healthServices = this.getHealthServices(selectKey, waitTime);
        if (!ObjectUtils.isEmpty(healthServices)) {
            watcherInstanceRegisterMap.put(selectKey, healthServices);
        } else {
            watcherInstanceRegisterMap.remove(selectKey);
        }
    }
watch key values.

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