/**
* 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.ArrayList;
import java.util.HashMap;
import java.util.List;
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.HCatFieldSchema;
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 "numbers"
* table and writes data to another table. It reads data from numbers which
* is an unpartitioned table and adds 10 to each field. It stores the result into
* the datestamp='20100101' partition of the numbers_part_empty_initially table if the second
* command line arg is "part". If the second cmdline arg is "nopart" then the
* result is stored into the 'numbers_nopart_empty_initially' (unpartitioned) table.
* If the second cmdline arg is "nopart_pig", then the result is stored into the
* 'numbers_nopart_pig_empty_initially' (unpartitioned) table with the tinyint
* and smallint columns in "numbers" being stored as "int" (since pig cannot handle
* tinyint and smallint)
*
* Usage: hadoop jar storenumbers <serveruri> <part|nopart|nopart_pig> <-libjars hive-hcat jar>
If the second argument is "part" data is written to datestamp = '2010101' partition of the numbers_part_empty_initially table.
If the second argument is "nopart", data is written to the unpartitioned numbers_nopart_empty_initially table.
If the second argument is "nopart_pig", data is written to the unpartitioned numbers_nopart_pig_empty_initially table.
The hcat jar location should be specified as file://<full path to jar>
*/
public class StoreNumbers {
private static final String NUMBERS_PARTITIONED_TABLE_NAME = "numbers_part_empty_initially";
private static final String NUMBERS_TABLE_NAME = "numbers";
private static final String NUMBERS_NON_PARTITIONED_TABLE_NAME = "numbers_nopart_empty_initially";
private static final String NUMBERS_NON_PARTITIONED_PIG_TABLE_NAME = "numbers_nopart_pig_empty_initially";
private static final String IS_PIG_NON_PART_TABLE = "is.pig.non.part.table";
public static class SumMapper
extends Mapper<WritableComparable, HCatRecord, WritableComparable, HCatRecord> {
Integer intnum1000;
// though id is given as a Short by hcat, the map will emit it as an
// IntWritable so we can just sum in the reduce
Short id;
// though intnum5 is handed as a Byte by hcat, the map() will emit it as
// an IntWritable so we can just sum in the reduce
Byte intnum5;
Integer intnum100;
Integer intnum;
Long longnum;
Float floatnum;
Double doublenum;
@Override
protected void map(WritableComparable key, HCatRecord value,
org.apache.hadoop.mapreduce.Mapper<WritableComparable, HCatRecord,
WritableComparable, HCatRecord>.Context context)
throws IOException, InterruptedException {
boolean isnoPartPig = context.getConfiguration().getBoolean(IS_PIG_NON_PART_TABLE, false);
intnum1000 = ((Integer) value.get(0));
id = ((Short) value.get(1));
intnum5 = (((Byte) value.get(2)));
intnum100 = (((Integer) value.get(3)));
intnum = ((Integer) value.get(4));
longnum = ((Long) value.get(5));
floatnum = ((Float) value.get(6));
doublenum = ((Double) value.get(7));
HCatRecord output = new DefaultHCatRecord(8);
output.set(0, intnum1000 + 10);
if (isnoPartPig) {
output.set(1, ((int) (id + 10)));
} else {
output.set(1, ((short) (id + 10)));
}
if (isnoPartPig) {
output.set(2, (int) (intnum5 + 10));
} else {
output.set(2, (byte) (intnum5 + 10));
}
output.set(3, intnum100 + 10);
output.set(4, intnum + 10);
output.set(5, (long) (longnum + 10));
output.set(6, (float) (floatnum + 10));
output.set(7, (double) (doublenum + 10));
for (int i = 0; i < 8; i++) {
System.err.println("XXX: class:" + output.get(i).getClass());
}
context.write(new IntWritable(0), output);
}
}
public static void main(String[] args) throws Exception {
Configuration conf = new Configuration();
args = new GenericOptionsParser(conf, args).getRemainingArgs();
String[] otherArgs = new String[2];
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 != 2) {
usage();
}
String serverUri = otherArgs[0];
if (otherArgs[1] == null || (
!otherArgs[1].equalsIgnoreCase("part") && !otherArgs[1].equalsIgnoreCase("nopart"))
&& !otherArgs[1].equalsIgnoreCase("nopart_pig")) {
usage();
}
boolean writeToPartitionedTable = (otherArgs[1].equalsIgnoreCase("part"));
boolean writeToNonPartPigTable = (otherArgs[1].equalsIgnoreCase("nopart_pig"));
String tableName = NUMBERS_TABLE_NAME;
String dbName = "default";
Map<String, String> outputPartitionKvps = new HashMap<String, String>();
String outputTableName = null;
conf.set(IS_PIG_NON_PART_TABLE, "false");
if (writeToPartitionedTable) {
outputTableName = NUMBERS_PARTITIONED_TABLE_NAME;
outputPartitionKvps.put("datestamp", "20100101");
} else {
if (writeToNonPartPigTable) {
conf.set(IS_PIG_NON_PART_TABLE, "true");
outputTableName = NUMBERS_NON_PARTITIONED_PIG_TABLE_NAME;
} else {
outputTableName = NUMBERS_NON_PARTITIONED_TABLE_NAME;
}
// test with null or empty randomly
if (new Random().nextInt(2) == 0) {
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, "storenumbers");
// initialize HCatInputFormat
HCatInputFormat.setInput(job, InputJobInfo.create(
dbName, tableName, null));
// initialize HCatOutputFormat
HCatOutputFormat.setOutput(job, OutputJobInfo.create(
dbName, outputTableName, outputPartitionKvps));
// test with and without specifying schema randomly
HCatSchema s = HCatInputFormat.getTableSchema(job);
if (writeToNonPartPigTable) {
List<HCatFieldSchema> newHfsList = new ArrayList<HCatFieldSchema>();
// change smallint and tinyint to int
for (HCatFieldSchema hfs : s.getFields()) {
if (hfs.getTypeString().equals("smallint")) {
newHfsList.add(new HCatFieldSchema(hfs.getName(),
HCatFieldSchema.Type.INT, hfs.getComment()));
} else if (hfs.getTypeString().equals("tinyint")) {
newHfsList.add(new HCatFieldSchema(hfs.getName(),
HCatFieldSchema.Type.INT, hfs.getComment()));
} else {
newHfsList.add(hfs);
}
}
s = new HCatSchema(newHfsList);
}
HCatOutputFormat.setSchema(job, s);
job.setInputFormatClass(HCatInputFormat.class);
job.setOutputFormatClass(HCatOutputFormat.class);
job.setJarByClass(StoreNumbers.class);
job.setMapperClass(SumMapper.class);
job.setOutputKeyClass(IntWritable.class);
job.setNumReduceTasks(0);
job.setOutputValueClass(DefaultHCatRecord.class);
System.exit(job.waitForCompletion(true) ? 0 : 1);
}
/**
*
*/
private static void usage() {
System.err.println("Usage: hadoop jar storenumbers <serveruri> <part|nopart|nopart_pig> <-libjars hive-hcat jar>\n" +
"\tIf the second argument is \"part\" data is written to datestamp = '2010101' partition of " +
"the numbers_part_empty_initially table.\n\tIf the second argument is \"nopart\", data is written to " +
"the unpartitioned numbers_nopart_empty_initially table.\n\tIf the second argument is \"nopart_pig\", " +
"data is written to the unpartitioned numbers_nopart_pig_empty_initially table.\nt" +
"The hcat jar location should be specified as file://<full path to jar>\n");
System.exit(2);
}
}