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.plugin.control.rule.storage;
  
  import com.alibaba.nacos.api.common.Constants;
  import com.alibaba.nacos.plugin.control.Loggers;
  import com.alibaba.nacos.plugin.control.utils.DiskUtils;
  import com.alibaba.nacos.plugin.control.utils.EnvUtils;
  import org.slf4j.Logger;
  
  import java.io.File;
  import java.io.IOException;
  
  /**
   * local disk storage.
   *
   * @author shiyiyue
   */
  public class LocalDiskRuleStorage implements RuleStorage {
      
      LocalDiskRuleStorage() {
      
      }
      
      private static final Logger LOGGER = Loggers.CONTROL;
      
      private String localRuleBaseDir = defaultBaseDir();
      
      private File checkTpsBaseDir() {
          File baseDir = new File(localRuleBaseDir, "data" + File.separator + "tps" + File.separator);
          if (!baseDir.exists()) {
              baseDir.mkdirs();
          }
          return baseDir;
      }
      
      public void setLocalRuleBaseDir(String localRruleBaseDir) {
          this.localRuleBaseDir = localRruleBaseDir;
      }
      
      private static String defaultBaseDir() {
          return EnvUtils.getNacosHome();
      }
      
      private File getConnectionRuleFile() {
          File baseDir = new File(localRuleBaseDir, "data" + File.separator + "connection" + File.separator);
          if (!baseDir.exists()) {
              baseDir.mkdirs();
          }
          return new File(baseDir, "limitRule");
      }
      
      @Override
      public String getName() {
          return "localdisk";
      }
      
      @Override
      public void saveConnectionRule(String ruleContent) throws IOException {
          File pointFile = getConnectionRuleFile();
          if (!pointFile.exists()) {
              pointFile.createNewFile();
          }
          DiskUtils.writeFile(pointFile, ruleContent.getBytes(Constants.ENCODE), false);
          LOGGER.info("Save connection rule to local, ruleContent ={} ", ruleContent);
      }
      
      @Override
      public String getConnectionRule() {
          File connectionRuleFile = getConnectionRuleFile();
          if (!connectionRuleFile.exists()) {
              return null;
          }
          return DiskUtils.readFile(connectionRuleFile);
      }
      
      @Override
      public void saveTpsRule(String pointName, String ruleContent) throws IOException {
          File file = checkTpsBaseDir();
          File tpsFile = new File(file, pointName);
          if (!tpsFile.exists()) {
              tpsFile.createNewFile();
          }
          if (ruleContent == null) {
              DiskUtils.deleteQuietly(tpsFile);
          } else {
              DiskUtils.writeFile(tpsFile, ruleContent.getBytes(Constants.ENCODE), false);
              LOGGER.info("Save tps rule to local,pointName={}, ruleContent ={} ", pointName, ruleContent);
              
          }
          
      }
      
      @Override
      public String getTpsRule(String pointName) {
          File file = checkTpsBaseDir();
          File tpsFile = new File(file, pointName);
          if (!tpsFile.exists()) {
              return null;
          }
          return DiskUtils.readFile(tpsFile);
      }
  }
  