content: /*
   * Copyright 1999-$toady.year 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.service.query.handler;
  
  import com.alibaba.nacos.common.utils.StringUtils;
  import com.alibaba.nacos.config.server.model.CacheItem;
  import com.alibaba.nacos.config.server.service.dump.disk.ConfigDiskServiceFactory;
  import com.alibaba.nacos.config.server.service.query.model.ConfigQueryChainRequest;
  import com.alibaba.nacos.config.server.service.query.model.ConfigQueryChainResponse;
  
  import java.io.IOException;
  
  /**
   * Formal Handler. This class represents a formal handler in the configuration query processing chain. If the request
   * has not been processed by previous handlers, it will be handled by this handler.
   *
   * @author Nacos
   */
  public class FormalHandler extends AbstractConfigQueryHandler {
      
      private static final String FORMAL_HANDLER = "formalHandler";
      
      @Override
      public String getName() {
          return FORMAL_HANDLER;
      }
      
      @Override
      public ConfigQueryChainResponse handle(ConfigQueryChainRequest request) throws IOException {
          ConfigQueryChainResponse response = new ConfigQueryChainResponse();
          
          String dataId = request.getDataId();
          String group = request.getGroup();
          String tenant = request.getTenant();
          
          CacheItem cacheItem = ConfigChainEntryHandler.getThreadLocalCacheItem();
          String md5 = cacheItem.getConfigCache().getMd5();
          String content = ConfigDiskServiceFactory.getInstance().getContent(dataId, group, tenant);
          if (StringUtils.isBlank(content)) {
              response.setStatus(ConfigQueryChainResponse.ConfigQueryStatus.CONFIG_NOT_FOUND);
              return response;
          }
          long lastModified = cacheItem.getConfigCache().getLastModifiedTs();
          String encryptedDataKey = cacheItem.getConfigCache().getEncryptedDataKey();
          String configType = cacheItem.getType();
          response.setContent(content);
          response.setMd5(md5);
          response.setLastModified(lastModified);
          response.setEncryptedDataKey(encryptedDataKey);
          response.setConfigType(configType);
          response.setStatus(ConfigQueryChainResponse.ConfigQueryStatus.CONFIG_FOUND_FORMAL);
          
          return response;
      }
  }