ivory.server.RunLocalRetrievalServer.java Source code

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Here is the source code for ivory.server.RunLocalRetrievalServer.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.server;

import ivory.core.util.XMLTools;

import javax.xml.parsers.DocumentBuilderFactory;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.log4j.Logger;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class RunLocalRetrievalServer {

    private static final Logger sLogger = Logger.getLogger(RunLocalRetrievalServer.class);

    public static void main(String[] args) throws Exception {
        if (args.length < 2) {
            System.out.println("usage: [config-file] [port]");
            System.exit(-1);
        }

        String configFile = args[0];

        FileSystem fs = FileSystem.getLocal(new Configuration());

        Document d = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(fs.open(new Path(configFile)));

        sLogger.info("Reading configuration...");
        NodeList servers = d.getElementsByTagName("server");

        if (servers.getLength() > 1)
            throw new Exception(
                    "Error: multiple servers specified.  Cannot launch more than one server on local machine!");

        String sid = null;
        for (int i = 0; i < servers.getLength(); i++) {
            // get server id
            Node node = servers.item(i);
            sid = XMLTools.getAttributeValue(node, "id", null);
        }

        if (sid == null) {
            throw new Exception("Must specify a query id attribute for every server!");
        }

        int port = Integer.parseInt(args[1]);

        RetrievalServer server = new RetrievalServer();
        server.initialize(sid, configFile, fs);
        server.start(port);

        while (true)
            ;
    }

}