com.talis.hadoop.rdf.solr.QuadsIndexer.java Source code

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Here is the source code for com.talis.hadoop.rdf.solr.QuadsIndexer.java

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/*
 *    Copyright 2011 Talis Systems Ltd
 * 
 *    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.talis.hadoop.rdf.solr;

import java.net.URI;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.filecache.DistributedCache;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.input.SequenceFileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import org.apache.jena.tdbloader3.Constants;
import org.apache.jena.tdbloader3.Utils;
import org.apache.solr.hadoop.SolrDocumentConverter;
import org.apache.solr.hadoop.SolrOutputFormat;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.talis.hadoop.rdf.QuadArrayWritable;

public class QuadsIndexer extends Configured implements Tool {

    private static final Logger LOG = LoggerFactory.getLogger(QuadsIndexer.class);

    public static final String JOB_NAME = "QuadsIndexing";

    public QuadsIndexer() {
        super();
        LOG.debug("Constructed with no configuration.");
    }

    public QuadsIndexer(Configuration configuration) {
        super(configuration);
        LOG.debug("Constructed with configuration.");
    }

    public int run(String[] args) throws Exception {

        Configuration configuration = getConf();

        boolean useCompression = configuration.getBoolean(Constants.OPTION_USE_COMPRESSION,
                Constants.OPTION_USE_COMPRESSION_DEFAULT);
        if (useCompression) {
            configuration.setBoolean("mapred.compress.map.output", true);
            configuration.set("mapred.output.compression.type", "BLOCK");
            configuration.set("mapred.map.output.compression.codec", "org.apache.hadoop.io.compress.GzipCodec");
        }

        boolean overrideOutput = configuration.getBoolean(Constants.OPTION_OVERRIDE_OUTPUT,
                Constants.OPTION_OVERRIDE_OUTPUT_DEFAULT);
        FileSystem outputFs = FileSystem.get(new Path(args[1]).toUri(), configuration);
        if (overrideOutput) {
            outputFs.delete(new Path(args[1]), true);
        }

        Job job = new Job(configuration);
        job.setJobName(JOB_NAME);
        job.setJarByClass(getClass());

        int shards = -1;
        boolean compressOutput = false;

        Path input = new Path(args[0]);
        Path output = new Path(args[1]);
        Path solrConfig = new Path(args[2]);
        FileInputFormat.addInputPath(job, input);
        FileOutputFormat.setOutputPath(job, output);

        if (shards > 0) {
            job.setNumReduceTasks(shards);
        }

        job.setMapperClass(Mapper.class);
        job.setInputFormatClass(SequenceFileInputFormat.class);
        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(QuadArrayWritable.class);

        job.setReducerClass(SolrReducer.class);
        SolrDocumentConverter.setSolrDocumentConverter(LiteralsIndexer.class, job.getConfiguration());

        job.setOutputFormatClass(SolrOutputFormat.class);

        String zipName = "solr.zip";
        FileSystem solrConfigFs = FileSystem.get(solrConfig.toUri(), configuration);
        final URI baseZipUrl = solrConfigFs.getUri().resolve(solrConfig.toString() + '#' + zipName);
        DistributedCache.addCacheArchive(baseZipUrl, job.getConfiguration());
        job.getConfiguration().set(SolrOutputFormat.SETUP_OK, solrConfig.toString());
        SolrOutputFormat.setOutputZipFormat(compressOutput, job.getConfiguration());

        if (LOG.isDebugEnabled())
            Utils.log(job, LOG);

        return job.waitForCompletion(true) ? 0 : -1;
    }

    @SuppressWarnings("PMD.SystemPrintln")
    public static void main(String[] args) throws Exception {
        LOG.debug("main method: {}", Utils.toString(args));
        int exitCode = ToolRunner.run(new Configuration(), new QuadsIndexer(), args);
        System.exit(exitCode);
    }

}