ivory.smrf.retrieval.RunQueryBroker.java Source code

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Here is the source code for ivory.smrf.retrieval.RunQueryBroker.java

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/*
 * Ivory: A Hadoop toolkit for web-scale information retrieval
 * 
 * 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 ivory.smrf.retrieval;

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapred.JobClient;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.Reporter;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import org.apache.log4j.Logger;

import edu.umd.cloud9.io.FSProperty;
import edu.umd.cloud9.mapred.NullInputFormat;
import edu.umd.cloud9.mapred.NullMapper;
import edu.umd.cloud9.mapred.NullOutputFormat;

/**
 * @author Tamer Elsayed
 */
public class RunQueryBroker extends Configured implements Tool {
    private static final Logger sLogger = Logger.getLogger(RunQueryBroker.class);

    protected static enum Time {
        Query
    };

    private static class Server extends NullMapper {

        public void run(JobConf conf, Reporter reporter) throws IOException {

            String configPath = conf.get("ConfigPath");
            String queriesFilePath = conf.get("QueriesFilePath");
            String resultsFilePath = conf.get("ResultsFilePath");
            String runtag = conf.get("Runtag");
            int numHits = conf.getInt("NumHits", 0);

            FileSystem fs = FileSystem.get(conf);
            String fname = appendPath(configPath, "broker.brokerhost");
            sLogger.info("Reading broker address from: " + fname);
            String brokerAddress = FSProperty.readString(fs, fname);
            sLogger.info("Broker address: " + brokerAddress);

            BrokerBatchQueryRunner qr;
            try {
                qr = new BrokerBatchQueryRunner(queriesFilePath, runtag, brokerAddress, resultsFilePath, numHits);

                long start = System.currentTimeMillis();
                qr.runQueries();
                long end = System.currentTimeMillis();

                reporter.incrCounter(Time.Query, (end - start));
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

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

    private static int printUsage() {
        System.out.println("usage: [config-path] [runtag] [queries-file] [results-file] [num-hits]");
        ToolRunner.printGenericCommandUsage(System.out);
        return -1;
    }

    /**
     * Runs this tool.
     */
    public int run(String[] args) throws Exception {
        if (args.length != 5) {
            printUsage();
            return -1;
        }

        String configPath = args[0];
        FileSystem fs = FileSystem.get(getConf());

        sLogger.info("server config path: " + configPath);
        FileStatus[] stats = fs.listStatus(new Path(configPath));

        if (stats == null) {
            sLogger.info("Error: " + configPath + " not found!");
            return -1;
        }

        String runtag = args[1];
        String queriesFilePath = args[2];
        String resultsFilePath = args[3];
        int numHits = Integer.parseInt(args[4]);

        JobConf conf = new JobConf(RunQueryBroker.class);
        conf.setJobName("RunQueryBroker");

        conf.setNumMapTasks(1);
        conf.setNumReduceTasks(0);

        conf.setInputFormat(NullInputFormat.class);
        conf.setOutputFormat(NullOutputFormat.class);
        conf.setMapperClass(Server.class);

        conf.set("QueriesFilePath", queriesFilePath);
        conf.set("ConfigPath", configPath);
        conf.set("ResultsFilePath", resultsFilePath);
        conf.set("Runtag", runtag);
        conf.setInt("NumHits", numHits);

        conf.set("mapred.child.java.opts", "-Xmx2048m");

        JobClient client = new JobClient(conf);
        client.submitJob(conf);

        sLogger.info("runner started!");

        return 0;
    }

    private static String appendPath(String base, String file) {
        return base + (base.endsWith("/") ? "" : "/") + file;
    }

    /**
     * Dispatches command-line arguments to the tool via the
     * <code>ToolRunner</code>.
     */
    public static void main(String[] args) throws Exception {
        int res = ToolRunner.run(new Configuration(), new RunQueryBroker(), args);
        System.exit(res);
    }
}