com.talis.hadoop.rdf.RdfSolrJob.java Source code

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Here is the source code for com.talis.hadoop.rdf.RdfSolrJob.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;

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.talis.hadoop.rdf.collation.QuadsCollater;
import com.talis.hadoop.rdf.merge.IndexMerge;
import com.talis.hadoop.rdf.merge.IndexMergeReducer;
import com.talis.hadoop.rdf.solr.QuadsIndexer;

public class RdfSolrJob extends Configured implements Tool {

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

    public static final String INTERMEDIATE_QUADS_URI = "tmp/collated/";
    public static final String INTERMEDIATE_SHARDS_URI = "tmp/shards/";
    public static final String SHARDS_MANIFEST = "tmp/shard.manifest";

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

        if (args.length != 4) {
            System.err.printf("Usage: %s [generic options] <input> <output> <solr config location> <optimize>\n",
                    getClass().getName());
            ToolRunner.printGenericCommandUsage(System.err);
            return -1;
        }

        String input = args[0];
        String output = args[1];
        String solrConfig = args[2];
        String optimizeIndexes = args[3];

        Configuration configuration = getConf();
        configuration.setBoolean(IndexMergeReducer.OPTIMIZE_OUTPUT, Boolean.getBoolean(optimizeIndexes));

        Tool collationStep = new QuadsCollater(configuration);
        collationStep.run(new String[] { input, INTERMEDIATE_QUADS_URI });

        Tool indexingStep = new QuadsIndexer(configuration);
        indexingStep.run(new String[] { INTERMEDIATE_QUADS_URI, INTERMEDIATE_SHARDS_URI, solrConfig });

        writeShardManifest(SHARDS_MANIFEST, INTERMEDIATE_SHARDS_URI, configuration);

        Tool mergeStep = new IndexMerge(configuration);
        mergeStep.run(new String[] { SHARDS_MANIFEST, output });

        return 0;
    }

    private void writeShardManifest(String manifestLocation, String shardLocation, Configuration configuration)
            throws IOException {
        Path shardsPath = new Path(INTERMEDIATE_SHARDS_URI);
        FileSystem fs = FileSystem.get(shardsPath.toUri(), configuration);
        StringBuffer buf = new StringBuffer();
        for (FileStatus status : fs.listStatus(shardsPath)) {
            LOG.info(status.getPath() + " : " + status.isDir());
            if (status.isDir()) {
                buf.append(status.getPath());
                buf.append("\n");
            }
        }
        FSDataOutputStream out = fs.create(new Path(manifestLocation));
        out.write(buf.toString().getBytes());
        out.flush();
        out.close();
    }

    public static void main(String[] args) throws Exception {
        int exitCode = ToolRunner.run(new RdfSolrJob(), args);
        System.exit(exitCode);
    }
}