| /** |
| * 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.AtlasEntityWithExtInfo; |
| import org.apache.atlas.model.instance.AtlasObjectId; |
| import org.apache.atlas.model.notification.HookNotification; |
| import org.apache.atlas.model.notification.HookNotification.EntityPartialUpdateRequestV2; |
| import org.apache.commons.collections.CollectionUtils; |
| import org.apache.hadoop.hive.metastore.api.FieldSchema; |
| import org.apache.hadoop.hive.ql.metadata.Table; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| public class AlterTableRenameCol extends AlterTable { |
| private static final Logger LOG = LoggerFactory.getLogger(AlterTableRenameCol.class); |
| |
| public AlterTableRenameCol(AtlasHiveHookContext context) { |
| super(context); |
| } |
| |
| @Override |
| public List<HookNotification> getNotificationMessages() throws Exception { |
| if (CollectionUtils.isEmpty(getHiveContext().getInputs())) { |
| LOG.error("AlterTableRenameCol: old-table not found in inputs list"); |
| |
| return null; |
| } |
| |
| if (CollectionUtils.isEmpty(getHiveContext().getOutputs())) { |
| LOG.error("AlterTableRenameCol: new-table not found in outputs list"); |
| |
| return null; |
| } |
| |
| List<HookNotification> baseMsgs = super.getNotificationMessages(); |
| |
| if (CollectionUtils.isEmpty(baseMsgs)) { |
| LOG.debug("Skipped processing of column-rename (on a temporary table?)"); |
| |
| return null; |
| } |
| |
| List<HookNotification> ret = new ArrayList<>(baseMsgs); |
| Table oldTable = getHiveContext().getInputs().iterator().next().getTable(); |
| Table newTable = getHiveContext().getOutputs().iterator().next().getTable(); |
| |
| newTable = getHive().getTable(newTable.getDbName(), newTable.getTableName()); |
| |
| List<FieldSchema> oldColumns = oldTable.getCols(); |
| List<FieldSchema> newColumns = newTable.getCols(); |
| FieldSchema changedColumnOld = null; |
| FieldSchema changedColumnNew = null; |
| |
| for (FieldSchema oldColumn : oldColumns) { |
| if (!newColumns.contains(oldColumn)) { |
| changedColumnOld = oldColumn; |
| |
| break; |
| } |
| } |
| |
| for (FieldSchema newColumn : newColumns) { |
| if (!oldColumns.contains(newColumn)) { |
| changedColumnNew = newColumn; |
| |
| break; |
| } |
| } |
| |
| if (changedColumnOld != null && changedColumnNew != null) { |
| AtlasObjectId oldColumnId = new AtlasObjectId(HIVE_TYPE_COLUMN, ATTRIBUTE_QUALIFIED_NAME, getQualifiedName(oldTable, changedColumnOld)); |
| AtlasEntity newColumn = new AtlasEntity(HIVE_TYPE_COLUMN); |
| |
| newColumn.setAttribute(ATTRIBUTE_NAME, changedColumnNew.getName()); |
| newColumn.setAttribute(ATTRIBUTE_QUALIFIED_NAME, getQualifiedName(newTable, changedColumnNew)); |
| |
| ret.add(0, new EntityPartialUpdateRequestV2(getUserName(), oldColumnId, new AtlasEntityWithExtInfo(newColumn))); |
| } else { |
| LOG.error("AlterTableRenameCol: no renamed column detected"); |
| } |
| |
| return ret; |
| } |
| } |