| /* |
| * 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.kylin.storage.hbase.util; |
| |
| import java.io.BufferedWriter; |
| import java.io.File; |
| import java.io.FileWriter; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| |
| import org.apache.commons.io.IOUtils; |
| import org.apache.kylin.common.KylinConfig; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.google.common.collect.Lists; |
| |
| /** |
| * Created by dongli on 2/29/16. |
| */ |
| public class HiveCmdBuilder { |
| private static final Logger logger = LoggerFactory.getLogger(HiveCmdBuilder.class); |
| |
| public enum HiveClientMode { |
| CLI, BEELINE |
| } |
| |
| private HiveClientMode clientMode; |
| private KylinConfig kylinConfig; |
| final private ArrayList<String> statements = Lists.newArrayList(); |
| |
| public HiveCmdBuilder() { |
| kylinConfig = KylinConfig.getInstanceFromEnv(); |
| clientMode = HiveClientMode.valueOf(kylinConfig.getHiveClientMode().toUpperCase()); |
| } |
| |
| public String build() { |
| StringBuffer buf = new StringBuffer(); |
| |
| switch (clientMode) { |
| case CLI: |
| buf.append("hive -e \""); |
| for (String statement : statements) { |
| buf.append(statement).append("\n"); |
| } |
| buf.append("\""); |
| break; |
| case BEELINE: |
| BufferedWriter bw = null; |
| try { |
| File tmpHql = File.createTempFile("beeline_", ".hql"); |
| StringBuffer hqlBuf = new StringBuffer(); |
| bw = new BufferedWriter(new FileWriter(tmpHql)); |
| for (String statement : statements) { |
| bw.write(statement); |
| bw.newLine(); |
| |
| hqlBuf.append(statement).append("\n"); |
| } |
| buf.append("beeline "); |
| buf.append(kylinConfig.getHiveBeelineParams()); |
| buf.append(" -f "); |
| buf.append(tmpHql.getAbsolutePath()); |
| buf.append(";rm -f "); |
| buf.append(tmpHql.getAbsolutePath()); |
| |
| logger.info("The statements to execute in beeline: \n" + hqlBuf); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } finally { |
| IOUtils.closeQuietly(bw); |
| } |
| break; |
| default: |
| throw new RuntimeException("Hive client cannot be recognized: " + clientMode); |
| } |
| |
| return buf.toString(); |
| } |
| |
| public void reset() { |
| statements.clear(); |
| } |
| |
| public void addStatement(String statement) { |
| statements.add(statement); |
| } |
| |
| @Override |
| public String toString() { |
| return build(); |
| } |
| } |