/tags/release-0.0.0-rc0/hive/external/ql/src/java/org/apache/hadoop/hive/ql/processors/CommandProcessorFactory.java
Java | 81 lines | 47 code | 12 blank | 22 comment | 15 complexity | 26c9b0384d07e4748f0896dbc4a85f9a MD5 | raw file
Possible License(s): Apache-2.0, BSD-3-Clause, JSON, CPL-1.0
- /**
- * 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.ql.processors;
- import static org.apache.commons.lang.StringUtils.isBlank;
- import java.util.Map;
- import java.util.HashMap;
- import org.apache.hadoop.hive.ql.Driver;
- import org.apache.hadoop.hive.ql.session.SessionState;
- import org.apache.hadoop.hive.conf.HiveConf;
- /**
- * CommandProcessorFactory.
- *
- */
- public final class CommandProcessorFactory {
- private CommandProcessorFactory() {
- // prevent instantiation
- }
- static Map<HiveConf, Driver> mapDrivers = new HashMap<HiveConf, Driver>();
- public static CommandProcessor get(String cmd) {
- return get(cmd, null);
- }
- public static CommandProcessor get(String cmd, HiveConf conf) {
- String cmdl = cmd.toLowerCase();
- if ("set".equals(cmdl)) {
- return new SetProcessor();
- } else if ("dfs".equals(cmdl)) {
- SessionState ss = SessionState.get();
- return new DfsProcessor(ss.getConf());
- } else if ("add".equals(cmdl)) {
- return new AddResourceProcessor();
- } else if ("delete".equals(cmdl)) {
- return new DeleteResourceProcessor();
- } else if (!isBlank(cmd)) {
- if (conf == null) {
- return new Driver();
- }
- Driver drv = mapDrivers.get(conf);
- if (drv == null) {
- drv = new Driver();
- mapDrivers.put(conf, drv);
- }
- drv.init();
- return drv;
- }
- return null;
- }
- public static void clean(HiveConf conf) {
- Driver drv = mapDrivers.get(conf);
- if (drv != null) {
- drv.destroy();
- }
- mapDrivers.remove(conf);
- }
- }