| /* |
| * 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 java.io.IOException; |
| import java.util.Collections; |
| import java.util.Set; |
| |
| import org.apache.calcite.schema.SchemaPlus; |
| import org.apache.calcite.schema.Table; |
| import org.apache.drill.exec.store.AbstractSchema; |
| import org.apache.drill.exec.store.AbstractSchemaFactory; |
| import org.apache.drill.exec.store.SchemaConfig; |
| import org.apache.hadoop.hbase.HTableDescriptor; |
| import org.apache.hadoop.hbase.client.Admin; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import com.google.common.collect.Sets; |
| |
| public class HBaseSchemaFactory extends AbstractSchemaFactory { |
| private static final Logger logger = LoggerFactory.getLogger(HBaseSchemaFactory.class); |
| |
| private final HBaseStoragePlugin plugin; |
| |
| public HBaseSchemaFactory(HBaseStoragePlugin plugin, String name) throws IOException { |
| super(name); |
| this.plugin = plugin; |
| } |
| |
| @Override |
| public void registerSchemas(SchemaConfig schemaConfig, SchemaPlus parent) throws IOException { |
| HBaseSchema schema = new HBaseSchema(getName()); |
| SchemaPlus hPlus = parent.add(getName(), schema); |
| schema.setHolder(hPlus); |
| } |
| |
| class HBaseSchema extends AbstractSchema { |
| |
| HBaseSchema(String name) { |
| super(Collections.emptyList(), name); |
| } |
| |
| public void setHolder(SchemaPlus plusOfThis) { |
| } |
| |
| @Override |
| public AbstractSchema getSubSchema(String name) { |
| return null; |
| } |
| |
| @Override |
| public Set<String> getSubSchemaNames() { |
| return Collections.emptySet(); |
| } |
| |
| @Override |
| public Table getTable(String name) { |
| HBaseScanSpec scanSpec = new HBaseScanSpec(name); |
| try { |
| return new DrillHBaseTable(getName(), plugin, scanSpec); |
| } catch (Exception e) { |
| // Calcite firstly looks for a table in the default schema, if the table was not found, |
| // it looks in the root schema. |
| // If the table does not exist, a query will fail at validation stage, |
| // so the error should not be thrown here. |
| logger.warn("Failure while loading table '{}' for database '{}'.", name, getName(), e.getCause()); |
| return null; |
| } |
| } |
| |
| @Override |
| public Set<String> getTableNames() { |
| try(Admin admin = plugin.getConnection().getAdmin()) { |
| HTableDescriptor[] tables = admin.listTables(); |
| Set<String> tableNames = Sets.newHashSet(); |
| for (HTableDescriptor table : tables) { |
| tableNames.add(table.getTableName().getNameAsString()); |
| } |
| return tableNames; |
| } catch (Exception e) { |
| logger.warn("Failure while loading table names for database '{}'.", getName(), e.getCause()); |
| return Collections.emptySet(); |
| } |
| } |
| |
| @Override |
| public String getTypeName() { |
| return HBaseStoragePluginConfig.NAME; |
| } |
| } |
| } |