| /* |
| * 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.hadoop.hive.metastore; |
| |
| import java.lang.reflect.Constructor; |
| import java.lang.reflect.InvocationTargetException; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hive.metastore.conf.MetastoreConf; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Factory class implementation to create instances of IMetaStoreSchemaInfo |
| * based on the provided configuration |
| */ |
| public class MetaStoreSchemaInfoFactory { |
| public static final Logger LOG = LoggerFactory.getLogger(MetaStoreSchemaInfoFactory.class); |
| |
| public static IMetaStoreSchemaInfo get(Configuration conf) { |
| String hiveHome = System.getenv("HIVE_HOME"); |
| if (hiveHome == null) { |
| LOG.debug("HIVE_HOME is not set. Using current directory instead"); |
| hiveHome = "."; |
| } |
| return get(conf, hiveHome, null); |
| } |
| |
| public static IMetaStoreSchemaInfo get(Configuration conf, String hiveHome, String dbType) { |
| String className = MetastoreConf.getVar(conf, MetastoreConf.ConfVars.SCHEMA_INFO_CLASS); |
| Class<?> clasz; |
| try { |
| clasz = conf.getClassByName(className); |
| } catch (ClassNotFoundException e) { |
| LOG.error("Unable to load class " + className, e); |
| throw new IllegalArgumentException(e); |
| } |
| Constructor<?> constructor; |
| try { |
| constructor = clasz.getConstructor(String.class, String.class); |
| constructor.setAccessible(true); |
| return (IMetaStoreSchemaInfo) constructor.newInstance(hiveHome, dbType); |
| } catch (NoSuchMethodException | InstantiationException | IllegalAccessException |
| | IllegalArgumentException | InvocationTargetException e) { |
| LOG.error("Unable to create instance of class " + className, e); |
| throw new IllegalArgumentException(e); |
| } |
| } |
| } |