content: /**
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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
   * <p/>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p/>
   * 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 org.apache.atlas.hive.hook.events;
  
  import org.apache.atlas.hive.hook.AtlasHiveHookContext;
  import org.apache.atlas.model.instance.AtlasEntity;
  import org.apache.atlas.model.instance.AtlasEntity.AtlasEntitiesWithExtInfo;
  import org.apache.atlas.model.notification.HookNotification;
  import org.apache.atlas.model.notification.HookNotification.EntityUpdateRequestV2;
  import org.apache.commons.collections.CollectionUtils;
  import org.apache.hadoop.hive.metastore.api.Database;
  import org.apache.hadoop.hive.metastore.events.AlterDatabaseEvent;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.util.Collections;
  import java.util.List;
  
  public class AlterDatabase extends CreateDatabase {
      private static final Logger LOG = LoggerFactory.getLogger(AlterDatabase.class);
  
      public AlterDatabase(AtlasHiveHookContext context) {
          super(context);
      }
  
      @Override
      public List<HookNotification> getNotificationMessages() throws Exception {
          List<HookNotification>   ret      = null;
          AtlasEntitiesWithExtInfo entities = context.isMetastoreHook() ? getHiveMetastoreEntities() : getHiveEntities();
  
          if (entities != null && CollectionUtils.isNotEmpty(entities.getEntities())) {
              ret = Collections.singletonList(new EntityUpdateRequestV2(getUserName(), entities));
          }
  
          return ret;
      }
  
      public AtlasEntitiesWithExtInfo getHiveMetastoreEntities() throws Exception {
          AtlasEntitiesWithExtInfo ret     = new AtlasEntitiesWithExtInfo();
          AlterDatabaseEvent       dbEvent = (AlterDatabaseEvent) context.getMetastoreEvent();
          Database                 oldDb   = dbEvent.getOldDatabase();
          Database                 newDb   = dbEvent.getNewDatabase();
  
          if (newDb != null) {
              AtlasEntity dbEntity = toDbEntity(newDb);
  
              ret.addEntity(dbEntity);
  
              addLocationEntities(dbEntity, ret);
          } else {
              LOG.error("AlterDatabase.getEntities(): failed to retrieve db");
          }
  
          addProcessedEntities(ret);
  
          return ret;
      }
  
      public AtlasEntitiesWithExtInfo getHiveEntities() throws Exception {
          return super.getHiveEntities();
      }
  }