com.ibm.crail.namenode.NameNode.java Source code

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Here is the source code for com.ibm.crail.namenode.NameNode.java

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/*
 * Crail: A Multi-tiered Distributed Direct Access File System
 *
 * Author: Patrick Stuedi <stu@zurich.ibm.com>
 *
 * Copyright (C) 2016, IBM Corporation
 *
 * 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.ibm.crail.namenode;

import java.net.URI;
import java.util.Arrays;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.DefaultParser;
import org.apache.commons.cli.HelpFormatter;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
import org.slf4j.Logger;

import com.ibm.crail.conf.CrailConfiguration;
import com.ibm.crail.conf.CrailConstants;
import com.ibm.crail.rpc.RpcBinding;
import com.ibm.crail.rpc.RpcNameNodeService;
import com.ibm.crail.utils.CrailUtils;

public class NameNode {
    private static final Logger LOG = CrailUtils.getLogger();

    public static void main(String args[]) throws Exception {
        LOG.info("initalizing namenode ");
        CrailConfiguration conf = new CrailConfiguration();
        CrailConstants.updateConstants(conf);

        URI uri = CrailUtils.getPrimaryNameNode();
        String address = uri.getHost();
        int port = uri.getPort();

        if (args != null) {
            Option addressOption = Option.builder("a").desc("ip address namenode is started on").hasArg().build();
            Option portOption = Option.builder("p").desc("port namenode is started on").hasArg().build();
            Options options = new Options();
            options.addOption(portOption);
            options.addOption(addressOption);
            CommandLineParser parser = new DefaultParser();

            try {
                CommandLine line = parser.parse(options, Arrays.copyOfRange(args, 0, args.length));
                if (line.hasOption(addressOption.getOpt())) {
                    address = line.getOptionValue(addressOption.getOpt());
                }
                if (line.hasOption(portOption.getOpt())) {
                    port = Integer.parseInt(line.getOptionValue(portOption.getOpt()));
                }
            } catch (ParseException e) {
                HelpFormatter formatter = new HelpFormatter();
                formatter.printHelp("Namenode", options);
                System.exit(-1);
            }
        }

        String namenode = "crail://" + address + ":" + port;
        long serviceId = CrailUtils.getServiceId(namenode);
        long serviceSize = CrailUtils.getServiceSize();
        if (!CrailUtils.verifyNamenode(namenode)) {
            throw new Exception("Namenode address/port [" + namenode
                    + "] has to be listed in crail.namenode.address " + CrailConstants.NAMENODE_ADDRESS);
        }

        CrailConstants.NAMENODE_ADDRESS = namenode + "?id=" + serviceId + "&size=" + serviceSize;
        CrailConstants.printConf();
        CrailConstants.verify();

        RpcNameNodeService service = RpcNameNodeService.createInstance(CrailConstants.NAMENODE_RPC_SERVICE);
        RpcBinding rpcBinding = RpcBinding.createInstance(CrailConstants.NAMENODE_RPC_TYPE);
        rpcBinding.init(conf, null);
        rpcBinding.printConf(LOG);
        rpcBinding.run(service);
        System.exit(0);
        ;
    }
}