content: /*
   * Copyright 1999-2023 Alibaba Group Holding Ltd.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.alibaba.nacos.client.utils;
  
  import com.alibaba.nacos.client.auth.ram.utils.SpasAdapter;
  import com.alibaba.nacos.common.utils.JacksonUtils;
  
  /**
   * Async do pre init to load some cost component.
   *
   * <ul>
   *     <li>JacksonUtil</li>
   *     <li>SpasAdapter</li>
   * </ul>
   *
   * @author xiweng.yy
   */
  public class PreInitUtils {
      
      /**
       * Async pre load cost component.
       */
      @SuppressWarnings("PMD.AvoidManuallyCreateThreadRule")
      public static void asyncPreLoadCostComponent() {
          Thread preLoadThread = new Thread(() -> {
              // Jackson util will init static {@code ObjectMapper}, which will cost hundreds milliseconds.
              JacksonUtils.createEmptyJsonNode();
              // Ram auth plugin will try to get credential from env and system when leak input identity by properties.
              SpasAdapter.getAk();
          });
          preLoadThread.start();
      }
  }
  