public void put(final String key, final String value) {
        try {
            client.getKVClient().put(ByteSequence.from(key, StandardCharsets.UTF_8), ByteSequence.from(value, StandardCharsets.UTF_8)).get();
        } catch (Exception e) {
            LOG.error("update value of node error.", e);
            throw new ShenyuException(e);
        }
    }
update value of node.
@param key node name
@param value node value
shenyu-admin-listener/shenyu-admin-listener-etcd/src/main/java/org/apache/shenyu/admin/listener/etcd/EtcdClient.java