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.EntityCreateRequestV2;
  import org.apache.commons.collections.CollectionUtils;
  import org.apache.hadoop.hive.metastore.api.Database;
  import org.apache.hadoop.hive.metastore.events.CreateDatabaseEvent;
  import org.apache.hadoop.hive.ql.hooks.Entity;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.util.Collections;
  import java.util.List;
  
  import static org.apache.atlas.hive.bridge.HiveMetaStoreBridge.getDatabaseName;
  import static org.apache.hadoop.hive.ql.hooks.Entity.Type.DATABASE;
  
  public class CreateDatabase extends BaseHiveEvent {
      private static final Logger LOG = LoggerFactory.getLogger(CreateDatabase.class);
  
      public CreateDatabase(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 EntityCreateRequestV2(getUserName(), entities));
          }
  
          return ret;
      }
  
      public AtlasEntitiesWithExtInfo getHiveMetastoreEntities() throws Exception {
          AtlasEntitiesWithExtInfo ret     = new AtlasEntitiesWithExtInfo();
          CreateDatabaseEvent      dbEvent = (CreateDatabaseEvent) context.getMetastoreEvent();
          Database                 db      = dbEvent.getDatabase();
  
          if (db != null) {
              db = context.getMetastoreHandler().get_database(db.getName());
          }
  
          if (db != null) {
              AtlasEntity dbEntity = toDbEntity(db);
  
              ret.addEntity(dbEntity);
  
              addLocationEntities(dbEntity, ret);
          } else {
              LOG.error("CreateDatabase.getEntities(): failed to retrieve db");
          }
  
          addProcessedEntities(ret);
  
          return ret;
      }
  
      public AtlasEntitiesWithExtInfo getHiveEntities() throws Exception {
          AtlasEntitiesWithExtInfo ret = new AtlasEntitiesWithExtInfo();
  
          for (Entity entity : getOutputs()) {
              if (entity.getType() == DATABASE) {
                  Database db = entity.getDatabase();
  
                  if (db != null) {
                      db = getHive().getDatabase(getDatabaseName(db));
                  }
  
                  if (db != null) {
                      AtlasEntity dbEntity    = toDbEntity(db);
                      AtlasEntity dbDDLEntity = createHiveDDLEntity(dbEntity);
  
                      ret.addEntity(dbEntity);
  
                      if (dbDDLEntity != null) {
                          ret.addEntity(dbDDLEntity);
                      }
  
                      addLocationEntities(dbEntity, ret);
                  } else {
                      LOG.error("CreateDatabase.getEntities(): failed to retrieve db");
                  }
              }
          }
  
          addProcessedEntities(ret);
  
          return ret;
      }
  
      public void addLocationEntities(AtlasEntity dbEntity, AtlasEntitiesWithExtInfo ret) {
          AtlasEntity dbLocationEntity = createHiveLocationEntity(dbEntity, ret);
  
          if (dbLocationEntity != null) {
              ret.addEntity(dbLocationEntity);
          }
      }
  }