edu.umd.cloud9.collection.clue.ClueWarcDocnoMappingBuilder.java Source code

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Here is the source code for edu.umd.cloud9.collection.clue.ClueWarcDocnoMappingBuilder.java

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/*
 * Cloud9: A Hadoop toolkit for working with big data
 *
 * 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 edu.umd.cloud9.collection.clue;

import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import java.util.List;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.FSDataOutputStream;
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.apache.log4j.Logger;

import com.google.common.base.Charsets;
import com.google.common.base.Joiner;
import com.google.common.io.CharStreams;
import com.google.common.io.InputSupplier;

import edu.umd.cloud9.collection.DocnoMapping;

public class ClueWarcDocnoMappingBuilder extends Configured implements Tool, DocnoMapping.Builder {
    private static final Logger LOG = Logger.getLogger(ClueWarcDocnoMappingBuilder.class);

    /**
     * Creates an instance of this tool.
     */
    public ClueWarcDocnoMappingBuilder() {
    }

    @Override
    public int build(Path src, Path dest, Configuration conf) throws IOException {
        super.setConf(conf);
        return run(new String[] { "-" + DocnoMapping.BuilderUtils.COLLECTION_OPTION + "=" + src.toString(),
                "-" + DocnoMapping.BuilderUtils.MAPPING_OPTION + "=" + dest.toString() });
    }

    /**
     * Runs this tool.
     */
    public int run(String[] args) throws IOException {
        DocnoMapping.DefaultBuilderOptions options = DocnoMapping.BuilderUtils.parseDefaultOptions(args);
        if (options == null) {
            return -1;
        }

        LOG.info("Tool name: " + ClueWarcDocnoMappingBuilder.class.getSimpleName());
        LOG.info(" - input path: " + options.collection);
        LOG.info(" - output file: " + options.docnoMapping);

        FileSystem fs = FileSystem.get(getConf());
        FSDataOutputStream out = fs.create(new Path(options.docnoMapping), true);
        final InputStream in = ClueWarcDocnoMapping.class.getResourceAsStream("docno.mapping");
        List<String> lines = CharStreams.readLines(CharStreams.newReaderSupplier(new InputSupplier<InputStream>() {
            @Override
            public InputStream getInput() throws IOException {
                return in;
            }
        }, Charsets.UTF_8));
        out.write((Joiner.on("\n").join(lines) + "\n").getBytes());
        out.close();
        return 0;
    }

    /**
     * Dispatches command-line arguments to the tool via the {@code ToolRunner}.
     */
    public static void main(String[] args) throws Exception {
        LOG.info("Running " + ClueWarcDocnoMappingBuilder.class.getCanonicalName() + " with args "
                + Arrays.toString(args));
        ToolRunner.run(new ClueWarcDocnoMappingBuilder(), args);
    }
}