| /* |
| * 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.tinkerpop.gremlin.hadoop.structure.io; |
| |
| import org.apache.tinkerpop.gremlin.hadoop.structure.HadoopGraph; |
| import org.apache.tinkerpop.gremlin.hadoop.structure.util.ConfUtil; |
| import org.apache.tinkerpop.gremlin.process.computer.MapReduce; |
| import org.apache.hadoop.conf.Configurable; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.io.RawComparator; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.DataInputStream; |
| import java.util.Comparator; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| public abstract class ObjectWritableComparator implements RawComparator<ObjectWritable>, HadoopPoolsConfigurable { |
| |
| public static final Logger LOGGER = LoggerFactory.getLogger(ObjectWritableComparator.class); |
| |
| protected Comparator comparator; |
| private final ObjectWritable objectWritable1 = new ObjectWritable(); |
| private final ObjectWritable objectWritable2 = new ObjectWritable(); |
| |
| @Override |
| public int compare(final ObjectWritable objectWritable1, final ObjectWritable objectWritable2) { |
| return this.comparator.compare(objectWritable1.get(), objectWritable2.get()); |
| } |
| |
| @Override |
| public int compare(byte[] bytes, int i, int i1, byte[] bytes1, int i2, int i3) { |
| try { |
| this.objectWritable1.readFields(new DataInputStream(new ByteArrayInputStream(bytes, i, i1))); |
| this.objectWritable2.readFields(new DataInputStream(new ByteArrayInputStream(bytes1, i2, i3))); |
| //System.out.println(objectWritable1 + "<=>" + objectWritable2 + ":::" + this.comparator.compare(objectWritable1.get(), objectWritable2.get())); |
| return this.comparator.compare(this.objectWritable1.get(), this.objectWritable2.get()); |
| } catch (final Exception e) { |
| LOGGER.error(e.getMessage()); |
| throw new IllegalStateException(e.getMessage()); |
| } |
| } |
| |
| public static class ObjectWritableMapComparator extends ObjectWritableComparator { |
| @Override |
| public void setConf(final Configuration configuration) { |
| super.setConf(configuration); |
| final org.apache.commons.configuration2.Configuration apacheConfiguration = ConfUtil.makeApacheConfiguration(configuration); |
| this.comparator = MapReduce.<MapReduce<?,?,?,?,?>>createMapReduce(HadoopGraph.open(apacheConfiguration),apacheConfiguration).getMapKeySort().get(); |
| } |
| } |
| |
| public static class ObjectWritableReduceComparator extends ObjectWritableComparator { |
| @Override |
| public void setConf(final Configuration configuration) { |
| super.setConf(configuration); |
| final org.apache.commons.configuration2.Configuration apacheConfiguration = ConfUtil.makeApacheConfiguration(configuration); |
| this.comparator = MapReduce.<MapReduce<?,?,?,?,?>>createMapReduce(HadoopGraph.open(apacheConfiguration),apacheConfiguration).getReduceKeySort().get(); |
| } |
| } |
| } |