com.ery.dimport.daemon.DImportMasterStart.java Source code

Introduction

Here is the source code for com.ery.dimport.daemon.DImportMasterStart.java

Source

/**
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.ery.dimport.daemon;

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

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.GnuParser;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.ery.dimport.DImportConstant;
import com.ery.server.conf.Configuration;
import com.ery.server.util.DNS;
import com.ery.server.util.ServerCommandLine;
import com.ery.server.util.StringUtils;
import com.ery.server.util.Strings;
import com.ery.server.util.VersionInfo;

public class DImportMasterStart extends ServerCommandLine {
    private static final Log LOG = LogFactory.getLog(DImportMasterStart.class);

    private static final String USAGE = "Usage: Master start|stop\n start  Start Master. \n"
            + " stop stop a task .\n clear  Delete the master znode in ZooKeeper after a master crashes\n";

    private final Class<? extends DaemonMaster> masterClass;

    public DImportMasterStart(Class<? extends DaemonMaster> masterClass) {
        this.masterClass = masterClass;
    }

    protected String getUsage() {
        return USAGE;
    }

    public int run(String args[]) throws Exception {
        Options opt = new Options();// ?? --param
        opt.addOption("debug", true, "debug type");// EStormConstant.DebugType
        CommandLine cmd;
        try {
            cmd = new GnuParser().parse(opt, args);
        } catch (ParseException e) {
            LOG.error("Could not parse: ", e);
            usage(null);
            return 1;
        }
        // if (test() > 0)
        // return 1;
        String debug = cmd.getOptionValue("debug");
        if (debug != null) {
            DImportConstant.DebugType = Integer.parseInt(debug);
        }
        List<String> remainingArgs = cmd.getArgList();
        if (remainingArgs.size() < 1) {
            usage(null);
            return 1;
        }
        String command = remainingArgs.get(0);
        if (command.equals("start")) {
            return startMaster();
        } else if (command.equals("stop")) {
            if (remainingArgs.size() == 1) {
                LOG.error("need taskId for stop order");
                usage("need taskId for stop order");
            }
            usage("??task");
            String taskId = remainingArgs.get(1);
            return 0;
        }
        return 0;
    }

    public static HostInfo getMasterServerName(Configuration conf) throws IOException {
        String hostname = Strings
                .domainNamePointerToHostName(DNS.getDefaultHost(conf.get("dimport.master.dns.interface", "default"),
                        conf.get("dimport.master.dns.nameserver", "default")));
        int _listenPort = conf.getInt(DImportConstant.DIMPORT_INFO_PORT_KEY, 3000);
        return new HostInfo(hostname, _listenPort, System.currentTimeMillis());
    }

    private int startMaster() {
        Configuration conf = getConf();
        try {
            logProcessInfo(getConf());
            DaemonMaster master = DaemonMaster.constructMaster(masterClass, conf);
            if (master.isStopped()) {
                LOG.info("Won't bring the Master up as a shutdown is requested");
                return 1;
            }
            master.start();
            master.join();
            if (master.isAborted())
                throw new RuntimeException("Dimport Master Aborted");
        } catch (Throwable t) {
            LOG.error("Dimport Master exiting", t);
            return 1;
        }
        return 0;
    }

    public static void main(String[] args) {
        VersionInfo.logVersion();
        StringUtils.startupShutdownMessage(DaemonMaster.class, args, LOG);
        new DImportMasterStart(DaemonMaster.class).doMain(args);
    }

}