/*
* Copyright 2011 10gen Inc.
*
* Licensed 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 com.mongodb.hadoop.examples.treasury;
import com.mongodb.hadoop.io.BSONWritable;
import com.mongodb.hadoop.mapred.MongoInputFormat;
import com.mongodb.hadoop.mapred.MongoOutputFormat;
import com.mongodb.hadoop.util.MongoConfigUtil;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.io.DoubleWritable;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.mapred.JobClient;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.MapReduceBase;
import org.apache.hadoop.mapred.Mapper;
import org.apache.hadoop.mapred.OutputCollector;
import org.apache.hadoop.mapred.Reducer;
import org.apache.hadoop.mapred.Reporter;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import org.bson.BasicBSONObject;
import java.io.IOException;
import java.util.Date;
import java.util.Iterator;
/**
* The treasury yield xml config object.
*/
public class TreasuryYieldXMLConfigV2 extends Configured implements Tool {
private static final Log LOG = LogFactory.getLog(TreasuryYieldXMLConfigV2.class);
static class TreasuryYieldMapperV2 extends MapReduceBase implements Mapper<BSONWritable, BSONWritable, IntWritable, DoubleWritable> {
@Override
@SuppressWarnings("deprecation")
public void map(final BSONWritable key, final BSONWritable value, final OutputCollector<IntWritable, DoubleWritable> output,
final Reporter reporter)
throws IOException {
final int year = ((Date) value.getDoc().get("_id")).getYear() + 1900;
double bid10Year = ((Number) value.getDoc().get("bc10Year")).doubleValue();
output.collect(new IntWritable(year), new DoubleWritable(bid10Year));
}
}
static class TreasuryYieldReducerV2 extends MapReduceBase implements Reducer<IntWritable, DoubleWritable, IntWritable, BSONWritable> {
@Override
public void reduce(final IntWritable key, final Iterator<DoubleWritable> values,
final OutputCollector<IntWritable, BSONWritable> output, final Reporter reporter) throws IOException {
int count = 0;
double sum = 0;
while (values.hasNext()) {
DoubleWritable value = values.next();
sum += value.get();
count++;
}
final double avg = sum / count;
LOG.info("V2: Average 10 Year Treasury for " + key.get() + " was " + avg);
BasicBSONObject outputObj = new BasicBSONObject();
outputObj.put("count", count);
outputObj.put("avg", avg);
outputObj.put("sum", sum);
output.collect(key, new BSONWritable(outputObj));
}
}
public int run(final String[] args) throws Exception {
final Configuration conf = getConf();
final JobConf job = new JobConf(conf);
job.setReducerClass(TreasuryYieldReducerV2.class);
job.setMapperClass(TreasuryYieldMapperV2.class);
job.setOutputFormat(MongoOutputFormat.class);
job.setOutputKeyClass(MongoConfigUtil.getOutputKey(conf));
job.setOutputValueClass(MongoConfigUtil.getOutputValue(conf));
job.setMapOutputKeyClass(MongoConfigUtil.getMapperOutputKey(conf));
job.setMapOutputValueClass(MongoConfigUtil.getMapperOutputValue(conf));
job.setInputFormat(MongoInputFormat.class);
JobClient.runJob(job);
return 0;
}
public static void main(final String[] args) throws Exception {
ToolRunner.run(new TreasuryYieldXMLConfigV2(), args);
}
}