/**
* 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.jena.tdbloader4;
import java.io.IOException;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper;
import org.openjena.atlas.event.Event;
import org.openjena.atlas.event.EventManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class ThirdMapper extends Mapper<LongWritable, Text, Text, Text> {
private static final Logger log = LoggerFactory.getLogger(ThirdMapper.class);
private Text outputKey = new Text();
private Text outputValue = new Text();
private Counters counters;
@Override
protected void setup(Context context) throws IOException, InterruptedException {
counters = new Counters(context);
}
@Override
public void map (LongWritable key, Text value, Context context) throws IOException, InterruptedException {
log.debug("< ({}, {})", key, value);
String[] values = value.toString().split("\\|");
outputKey.set(values[0]);
outputValue.set(key + "|" + values[1]);
context.write(outputKey, outputValue);
log.debug("> ({}, {})", outputKey, outputValue);
outputKey.clear();
outputValue.clear();
EventManager.send(counters, new Event(Constants.eventRdfNode, null));
}
@Override
protected void cleanup(Context context) throws IOException, InterruptedException {
counters.close();
}
}