| /* |
| * 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 |
| * |
| * 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 org.apache.drill.exec.store.hbase; |
| |
| import org.apache.calcite.rel.type.RelDataType; |
| import org.apache.calcite.rel.type.RelDataTypeFactory; |
| import org.apache.calcite.sql.type.SqlTypeName; |
| import org.apache.drill.common.exceptions.UserException; |
| import org.apache.drill.exec.planner.logical.DrillTable; |
| import org.apache.drill.exec.planner.logical.DrillTableSelection; |
| import org.apache.drill.exec.store.StoragePlugin; |
| import org.apache.hadoop.hbase.TableName; |
| import org.apache.hadoop.hbase.client.Connection; |
| import org.apache.hadoop.hbase.HTableDescriptor; |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Set; |
| |
| import static org.apache.drill.exec.store.hbase.DrillHBaseConstants.ROW_KEY; |
| |
| public abstract class AbstractHBaseDrillTable extends DrillTable { |
| private static final Logger logger = LoggerFactory.getLogger(AbstractHBaseDrillTable.class); |
| |
| protected HTableDescriptor tableDesc; |
| |
| public AbstractHBaseDrillTable(String storageEngineName, StoragePlugin plugin, DrillTableSelection selection) { |
| super(storageEngineName, plugin, selection); |
| } |
| |
| @Override |
| public RelDataType getRowType(RelDataTypeFactory typeFactory) { |
| ArrayList<RelDataType> typeList = new ArrayList<>(); |
| ArrayList<String> fieldNameList = new ArrayList<>(); |
| |
| fieldNameList.add(ROW_KEY); |
| typeList.add(typeFactory.createSqlType(SqlTypeName.ANY)); |
| |
| Set<byte[]> families = tableDesc.getFamiliesKeys(); |
| for (byte[] family : families) { |
| fieldNameList.add(Bytes.toString(family)); |
| typeList.add(typeFactory.createMapType(typeFactory.createSqlType(SqlTypeName.VARCHAR), typeFactory.createSqlType(SqlTypeName.ANY))); |
| } |
| return typeFactory.createStructType(typeList, fieldNameList); |
| } |
| |
| /** |
| * Allows to set HTableDescriptor |
| * |
| * @param connection with a server |
| * @param tableName the name of table |
| */ |
| protected void setTableDesc(Connection connection, String tableName) { |
| try { |
| tableDesc = connection.getAdmin().getTableDescriptor(TableName.valueOf(tableName)); |
| } catch (IOException e) { |
| throw UserException.dataReadError() |
| .message("Failure while loading table %s in database %s.", tableName, getStorageEngineName()) |
| .addContext("Message: ", e.getMessage()) |
| .build(logger); |
| } |
| } |
| |
| } |