com.dumontierlab.pdb2rdf.cluster.ClusterServer.java Source code

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Here is the source code for com.dumontierlab.pdb2rdf.cluster.ClusterServer.java

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/**
 * Copyright (c) 2013 Dumontierlab
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.dumontierlab.pdb2rdf.cluster;

import java.io.File;

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.GnuParser;
import org.apache.commons.cli.HelpFormatter;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.OptionBuilder;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
import org.apache.log4j.Logger;
import org.mortbay.jetty.Server;
import org.mortbay.jetty.servlet.Context;
import org.mortbay.jetty.servlet.ServletHolder;

import com.dumontierlab.pdb2rdf.cluster.servlet.ClusterController;

/**
 * @author Alexander De Leon
 */
public class ClusterServer {
    private static final Logger LOG = Logger.getLogger(ClusterServer.class);

    private static final int DEFAULT_PORT = 9966;

    public static void main(String[] args) {

        Options options = createOptions();
        CommandLineParser parser = createCliParser();

        try {
            CommandLine cmd = parser.parse(options, args);

            if (!cmd.hasOption("dir")) {
                LOG.fatal("You need to specify the input directory");
                System.exit(1);
            }
            File inputDir = new File(cmd.getOptionValue("dir"));
            if (!inputDir.exists() || !inputDir.isDirectory()) {
                LOG.fatal("The specified input directory is not a valid directory");
                System.exit(1);
            }

            int port = DEFAULT_PORT;
            if (cmd.hasOption("port")) {
                try {
                    port = Integer.parseInt(cmd.getOptionValue("port"));
                } catch (NumberFormatException e) {
                    LOG.fatal("Invalid port number", e);
                    System.exit(1);
                }
            }
            boolean gzip = cmd.hasOption("gzip");

            try {
                startServer(inputDir, gzip, port);
            } catch (Exception e) {
                LOG.fatal("Unable to start the server.", e);
                System.exit(1);
            }

        } catch (ParseException e) {
            LOG.fatal("Unable understand your command.");
            printUsage();
            System.exit(1);
        }

    }

    private static void startServer(File inputDir, boolean gzip, int port) throws Exception {
        Server server = new Server(port);
        Context root = new Context(server, "/", Context.SESSIONS);
        root.addServlet(new ServletHolder(new ClusterController(inputDir, gzip)), "/*");
        server.start();
    }

    private static CommandLineParser createCliParser() {
        return new GnuParser();
    }

    @SuppressWarnings("static-access")
    private static Options createOptions() {
        Options options = new Options();
        Option dirOption = OptionBuilder.withArgName("path")
                .withDescription("Directory where input files are located").hasArg(true).isRequired(true)
                .create("dir");
        options.addOption(dirOption);
        options.addOption("gzip", false, "Input is given as gzip file(s)");

        Option portOption = OptionBuilder.withArgName("number")
                .withDescription("The port number to listen for client connections.").hasArg(true).create("port");
        options.addOption(portOption);
        return options;
    }

    private static void printUsage() {
        HelpFormatter helpFormatter = new HelpFormatter();
        helpFormatter.printHelp("pdb2rdf [OPTIONS]", createOptions());
    }

}