org.apache.tajo.yarn.Client.java Source code

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Here is the source code for org.apache.tajo.yarn.Client.java

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/**
 * 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 org.apache.tajo.yarn;

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.GnuParser;
import org.apache.commons.cli.Options;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.apache.tajo.yarn.command.*;

import java.util.Arrays;
import java.util.HashMap;

/**
 */
@InterfaceAudience.Public
@InterfaceStability.Unstable
public class Client {

    private static final Log LOG = LogFactory.getLog(Client.class);

    // Configuration  for tajo-yarn rather than tajo
    private Configuration conf;

    public Client(Configuration conf) {
        this.conf = conf;
    }

    /**
     * @param args the command line arguments
     * @throws Exception
     */
    @SuppressWarnings("rawtypes")
    public void run(String[] args) throws Exception {
        HashMap<String, Command> commands = new HashMap<String, Command>();
        HelpCommand help = new HelpCommand(commands);
        commands.put("help", help);
        commands.put("launch", new LaunchCommand(conf));
        commands.put("worker", new WorkerOpCommand(conf));

        String commandName = null;
        String[] commandArgs = null;
        if (args.length < 1) {
            commandName = "help";
            commandArgs = new String[0];
        } else {
            commandName = args[0];
            commandArgs = Arrays.copyOfRange(args, 1, args.length);
        }
        Command command = commands.get(commandName);
        if (command == null) {
            LOG.error("ERROR: " + commandName + " is not a supported command.");
            help.printHelpFor(null);
            System.exit(1);
        }
        Options opts = command.getOpts();
        if (!opts.hasOption("h")) {
            opts.addOption("h", "help", false, "print out a help message");
        }
        CommandLine cl = new GnuParser().parse(command.getOpts(), commandArgs);
        if (cl.hasOption("help")) {
            help.printHelpFor(Arrays.asList(commandName));
        } else {

            command.process(cl);
        }
    }

    public static void main(String[] args) throws Exception {
        YarnConfiguration conf = new YarnConfiguration();
        Client client = new Client(conf);
        client.run(args);
    }

}