content: /*
   * Copyright 1999-2024 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.config.server.model;
  
  import com.alibaba.nacos.common.spi.NacosServiceLoader;
  import com.alibaba.nacos.common.utils.StringUtils;
  import com.alibaba.nacos.sys.env.EnvUtil;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.util.Collection;
  
  /**
   * The type Config cache md5 post processor delegate.
   *
   * @author Sunrisea
   */
  public class ConfigCachePostProcessorDelegate {
      
      private static final Logger LOGGER = LoggerFactory.getLogger(ConfigCacheFactoryDelegate.class);
      
      private static ConfigCachePostProcessorDelegate instance = new ConfigCachePostProcessorDelegate();
      
      private String configCacheMd5PostProcessorType = EnvUtil.getProperty("nacos.config.cache.type", "nacos");
      
      private ConfigCachePostProcessor configCachePostProcessor;
      
      private ConfigCachePostProcessorDelegate() {
          Collection<ConfigCachePostProcessor> processors = NacosServiceLoader.load(ConfigCachePostProcessor.class);
          for (ConfigCachePostProcessor processor : processors) {
              if (StringUtils.isEmpty(processor.getName())) {
                  LOGGER.warn(
                          "[ConfigCachePostProcessorDelegate] Load ConfigCachePostProcessor({}) PostProcessorName(null/empty) fail. "
                                  + "Please add PostProcessorName to resolve", processor.getClass().getName());
                  continue;
              }
              LOGGER.info(
                      "[ConfigCachePostProcessorDelegate] Load ConfigCachePostProcessor({}) PostProcessorName({}) successfully. ",
                      processor.getClass().getName(), processor.getName());
              if (StringUtils.equals(configCacheMd5PostProcessorType, processor.getName())) {
                  LOGGER.info(
                          "[ConfigCachePostProcessorDelegate] Matched ConfigCachePostProcessor found,set configCacheFactory={}",
                          processor.getClass().getName());
                  this.configCachePostProcessor = processor;
              }
          }
          if (configCachePostProcessor == null) {
              LOGGER.info(
                      "[ConfigCachePostProcessorDelegate] Matched ConfigCachePostProcessor not found, "
                              + "load Default NacosConfigCachePostProcessor successfully");
              configCachePostProcessor = new NacosConfigCachePostProcessor();
          }
      }
      
      public static ConfigCachePostProcessorDelegate getInstance() {
          return instance;
      }
      
      public void postProcess(ConfigCache configCache, String content) {
          configCachePostProcessor.postProcess(configCache, content);
      }
  }
  