content: /*
   * Copyright 1999-2020 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.naming.core.v2.cleaner;
  
  import com.alibaba.nacos.naming.core.v2.metadata.ExpiredMetadataInfo;
  import com.alibaba.nacos.naming.core.v2.metadata.NamingMetadataManager;
  import com.alibaba.nacos.naming.core.v2.metadata.NamingMetadataOperateService;
  import com.alibaba.nacos.naming.misc.GlobalConfig;
  import com.alibaba.nacos.naming.misc.GlobalExecutor;
  import com.alibaba.nacos.naming.misc.Loggers;
  import org.springframework.stereotype.Component;
  
  import java.util.concurrent.TimeUnit;
  
  /**
   * Expired metadata cleaner.
   *
   * @author xiweng.yy
   */
  @Component
  public class ExpiredMetadataCleaner extends AbstractNamingCleaner {
      
      private static final String EXPIRED_METADATA = "expiredMetadata";
      
      private static final int INITIAL_DELAY = 5000;
      
      private final NamingMetadataManager metadataManager;
      
      private final NamingMetadataOperateService metadataOperateService;
      
      public ExpiredMetadataCleaner(NamingMetadataManager metadataManager,
              NamingMetadataOperateService metadataOperateService) {
          this.metadataManager = metadataManager;
          this.metadataOperateService = metadataOperateService;
          GlobalExecutor.scheduleExpiredClientCleaner(this, INITIAL_DELAY, GlobalConfig.getExpiredMetadataCleanInterval(),
                  TimeUnit.MILLISECONDS);
      }
      
      @Override
      public String getType() {
          return EXPIRED_METADATA;
      }
      
      @Override
      public void doClean() {
          long currentTime = System.currentTimeMillis();
          for (ExpiredMetadataInfo each : metadataManager.getExpiredMetadataInfos()) {
              if (currentTime - each.getCreateTime() > GlobalConfig.getExpiredMetadataExpiredTime()) {
                  removeExpiredMetadata(each);
              }
          }
      }
      
      private void removeExpiredMetadata(ExpiredMetadataInfo expiredInfo) {
          Loggers.SRV_LOG.info("Remove expired metadata {}", expiredInfo);
          if (null == expiredInfo.getMetadataId()) {
              if (metadataManager.containServiceMetadata(expiredInfo.getService())) {
                  metadataOperateService.deleteServiceMetadata(expiredInfo.getService());
              }
          } else {
              if (metadataManager.containInstanceMetadata(expiredInfo.getService(), expiredInfo.getMetadataId())) {
                  metadataOperateService.deleteInstanceMetadata(expiredInfo.getService(), expiredInfo.getMetadataId());
              }
          }
      }
  }
  