| /** |
| * 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.hcatalog.utils; |
| |
| import java.io.IOException; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Random; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.io.IntWritable; |
| import org.apache.hadoop.io.WritableComparable; |
| import org.apache.hadoop.mapreduce.Job; |
| import org.apache.hadoop.mapreduce.Mapper; |
| import org.apache.hadoop.util.GenericOptionsParser; |
| import org.apache.hcatalog.common.HCatConstants; |
| import org.apache.hcatalog.data.DefaultHCatRecord; |
| import org.apache.hcatalog.data.HCatRecord; |
| import org.apache.hcatalog.data.schema.HCatSchema; |
| import org.apache.hcatalog.mapreduce.HCatInputFormat; |
| import org.apache.hcatalog.mapreduce.HCatOutputFormat; |
| import org.apache.hcatalog.mapreduce.InputJobInfo; |
| import org.apache.hcatalog.mapreduce.OutputJobInfo; |
| |
| /** |
| * This is a map reduce test for testing hcat which goes against the "complex" |
| * table and writes to "complex_nopart_empty_initially" table. It reads data from complex which |
| * is an unpartitioned table and stores the data as-is into complex_empty_initially table |
| * (which is also unpartitioned) |
| * |
| * Usage: hadoop jar testudf.jar storecomplex <serveruri> <-libjars hive-hcat jar> |
| The hcat jar location should be specified as file://<full path to jar> |
| */ |
| public class StoreComplex { |
| |
| private static final String COMPLEX_TABLE_NAME = "complex"; |
| private static final String COMPLEX_NOPART_EMPTY_INITIALLY_TABLE_NAME = "complex_nopart_empty_initially"; |
| |
| |
| public static class ComplexMapper |
| extends Mapper<WritableComparable, HCatRecord, WritableComparable, HCatRecord> { |
| |
| @Override |
| protected void map(WritableComparable key, HCatRecord value, |
| org.apache.hadoop.mapreduce.Mapper<WritableComparable, HCatRecord, |
| WritableComparable, HCatRecord>.Context context) |
| throws IOException, InterruptedException { |
| // just write out the value as-is |
| context.write(new IntWritable(0), value); |
| |
| } |
| } |
| |
| |
| public static void main(String[] args) throws Exception { |
| Configuration conf = new Configuration(); |
| args = new GenericOptionsParser(conf, args).getRemainingArgs(); |
| String[] otherArgs = new String[1]; |
| int j = 0; |
| for (int i = 0; i < args.length; i++) { |
| if (args[i].equals("-libjars")) { |
| // generic options parser doesn't seem to work! |
| conf.set("tmpjars", args[i + 1]); |
| i = i + 1; // skip it , the for loop will skip its value |
| } else { |
| otherArgs[j++] = args[i]; |
| } |
| } |
| if (otherArgs.length != 1) { |
| usage(); |
| } |
| String serverUri = otherArgs[0]; |
| String tableName = COMPLEX_TABLE_NAME; |
| String dbName = "default"; |
| Map<String, String> outputPartitionKvps = new HashMap<String, String>(); |
| String outputTableName = null; |
| outputTableName = COMPLEX_NOPART_EMPTY_INITIALLY_TABLE_NAME; |
| // test with null or empty randomly |
| if (new Random().nextInt(2) == 0) { |
| System.err.println("INFO: output partition keys set to null for writing"); |
| outputPartitionKvps = null; |
| } |
| String principalID = System.getProperty(HCatConstants.HCAT_METASTORE_PRINCIPAL); |
| if (principalID != null) |
| conf.set(HCatConstants.HCAT_METASTORE_PRINCIPAL, principalID); |
| Job job = new Job(conf, "storecomplex"); |
| // initialize HCatInputFormat |
| |
| HCatInputFormat.setInput(job, InputJobInfo.create( |
| dbName, tableName, null)); |
| // initialize HCatOutputFormat |
| HCatOutputFormat.setOutput(job, OutputJobInfo.create( |
| dbName, outputTableName, outputPartitionKvps)); |
| |
| |
| HCatSchema s = HCatInputFormat.getTableSchema(job); |
| HCatOutputFormat.setSchema(job, s); |
| job.setInputFormatClass(HCatInputFormat.class); |
| job.setOutputFormatClass(HCatOutputFormat.class); |
| job.setJarByClass(StoreComplex.class); |
| job.setMapperClass(ComplexMapper.class); |
| job.setOutputKeyClass(IntWritable.class); |
| job.setOutputValueClass(DefaultHCatRecord.class); |
| System.exit(job.waitForCompletion(true) ? 0 : 1); |
| } |
| |
| |
| /** |
| * |
| */ |
| private static void usage() { |
| System.err.println("Usage: hadoop jar testudf.jar storecomplex <serveruri> <-libjars hive-hcat jar>\n" + |
| "The hcat jar location should be specified as file://<full path to jar>\n"); |
| System.exit(2); |
| |
| } |
| |
| |
| } |