org.apache.gobblin.compaction.mapreduce.CompactionOrcJobConfigurator.java Source code

Introduction

Here is the source code for org.apache.gobblin.compaction.mapreduce.CompactionOrcJobConfigurator.java

Source

/*
 * 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.gobblin.compaction.mapreduce;

import java.io.IOException;
import org.apache.gobblin.compaction.mapreduce.orc.OrcKeyCompactorOutputFormat;
import org.apache.gobblin.compaction.mapreduce.orc.OrcKeyComparator;
import org.apache.gobblin.compaction.mapreduce.orc.OrcKeyDedupReducer;
import org.apache.gobblin.compaction.mapreduce.orc.OrcUtils;
import org.apache.gobblin.compaction.mapreduce.orc.OrcValueMapper;
import org.apache.gobblin.compaction.mapreduce.orc.OrcValueCombineFileInputFormat;
import org.apache.gobblin.configuration.State;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.mapreduce.Job;
import org.apache.orc.OrcConf;
import org.apache.orc.TypeDescription;
import org.apache.orc.mapred.OrcKey;
import org.apache.orc.mapred.OrcValue;

import static org.apache.gobblin.compaction.mapreduce.CompactorOutputCommitter.*;

public class CompactionOrcJobConfigurator extends CompactionJobConfigurator {
    public static class Factory implements CompactionJobConfigurator.ConfiguratorFactory {
        @Override
        public CompactionJobConfigurator createConfigurator(State state) throws IOException {
            return new CompactionOrcJobConfigurator(state);
        }
    }

    public CompactionOrcJobConfigurator(State state) throws IOException {
        super(state);
    }

    @Override
    public String getFileExtension() {
        return this.state.getProp(COMPACTION_OUTPUT_EXTENSION, EXTENSION.ORC.getExtensionString());
    }

    protected void configureSchema(Job job) throws IOException {
        TypeDescription schema = OrcUtils.getNewestSchemaFromSource(job, this.fs);

        job.getConfiguration().set(OrcConf.MAPRED_INPUT_SCHEMA.getAttribute(), schema.toString());
        job.getConfiguration().set(OrcConf.MAPRED_SHUFFLE_KEY_SCHEMA.getAttribute(), schema.toString());
        job.getConfiguration().set(OrcConf.MAPRED_SHUFFLE_VALUE_SCHEMA.getAttribute(), schema.toString());
        job.getConfiguration().set(OrcConf.MAPRED_OUTPUT_SCHEMA.getAttribute(), schema.toString());
    }

    protected void configureMapper(Job job) {
        job.setInputFormatClass(OrcValueCombineFileInputFormat.class);
        job.setMapperClass(OrcValueMapper.class);
        job.setMapOutputKeyClass(OrcKey.class);
        job.setMapOutputValueClass(OrcValue.class);
        job.setGroupingComparatorClass(OrcKeyComparator.class);
        job.setSortComparatorClass(OrcKeyComparator.class);
    }

    protected void configureReducer(Job job) throws IOException {
        job.setReducerClass(OrcKeyDedupReducer.class);
        job.setOutputFormatClass(OrcKeyCompactorOutputFormat.class);
        job.setOutputKeyClass(NullWritable.class);
        job.setOutputValueClass(OrcValue.class);
        setNumberOfReducers(job);
    }
}