/**
* 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.crunch.impl.mr.run;
import java.util.List;
import java.util.Map;
import org.apache.crunch.io.impl.InputBundle;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.JobContext;
import com.google.common.base.Joiner;
import com.google.common.base.Splitter;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
public class CrunchInputs {
private static final char RECORD_SEP = ',';
private static final char FIELD_SEP = ';';
private static final Joiner JOINER = Joiner.on(FIELD_SEP);
private static final Splitter SPLITTER = Splitter.on(FIELD_SEP);
public static void addInputPath(Job job, Path path, InputBundle inputBundle, int nodeIndex) {
Configuration conf = job.getConfiguration();
String inputs = JOINER.join(inputBundle.serialize(), String.valueOf(nodeIndex), path.toString());
String existing = conf.get(RuntimeParameters.MULTI_INPUTS);
conf.set(RuntimeParameters.MULTI_INPUTS, existing == null ? inputs : existing + RECORD_SEP + inputs);
}
public static Map<InputBundle, Map<Integer, List<Path>>> getFormatNodeMap(JobContext job) {
Map<InputBundle, Map<Integer, List<Path>>> formatNodeMap = Maps.newHashMap();
Configuration conf = job.getConfiguration();
for (String input : Splitter.on(RECORD_SEP).split(conf.get(RuntimeParameters.MULTI_INPUTS))) {
List<String> fields = Lists.newArrayList(SPLITTER.split(input));
InputBundle inputBundle = InputBundle.fromSerialized(fields.get(0));
if (!formatNodeMap.containsKey(inputBundle)) {
formatNodeMap.put(inputBundle, Maps.<Integer, List<Path>> newHashMap());
}
Integer nodeIndex = Integer.valueOf(fields.get(1));
if (!formatNodeMap.get(inputBundle).containsKey(nodeIndex)) {
formatNodeMap.get(inputBundle).put(nodeIndex, Lists.<Path> newLinkedList());
}
formatNodeMap.get(inputBundle).get(nodeIndex).add(new Path(fields.get(2)));
}
return formatNodeMap;
}
}