org.apache.tajo.cli.tools.TajoHAAdmin.java Source code

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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.cli.tools;

import com.google.protobuf.ServiceException;
import org.apache.commons.cli.*;
import org.apache.tajo.client.TajoClient;
import org.apache.tajo.conf.TajoConf;
import org.apache.tajo.service.ServiceTracker;
import org.apache.tajo.service.ServiceTrackerFactory;
import org.apache.tajo.util.NetUtils;

import java.io.IOException;
import java.io.PrintWriter;
import java.io.Writer;
import java.net.InetSocketAddress;

public class TajoHAAdmin {
    private static final Options options;

    static {
        options = new Options();
        options.addOption("h", "host", true, "Tajo server host");
        options.addOption("p", "port", true, "Tajo server port");
        options.addOption("transitionToActive", null, true, "Transitions the master into Active state");
        options.addOption("transitionToBackup", null, true, "Transitions the master into Backup state");
        options.addOption("getState", null, true, "Returns the state of the master");
        options.addOption("formatHA", null, false, "Format HA status on share storage");
    }

    private TajoConf tajoConf;
    private Writer writer;
    private ServiceTracker serviceTracker;

    public TajoHAAdmin(TajoConf tajoConf, Writer writer) {
        this(tajoConf, writer, null);
    }

    public TajoHAAdmin(TajoConf tajoConf, Writer writer, TajoClient tajoClient) {
        this.tajoConf = tajoConf;
        this.writer = writer;
        serviceTracker = ServiceTrackerFactory.get(this.tajoConf);
    }

    private void printUsage() {
        HelpFormatter formatter = new HelpFormatter();
        formatter.printHelp("haadmin [options]", options);
    }

    public void runCommand(String[] args) throws Exception {
        if (args.length == 1 && (args[0].equalsIgnoreCase("-transitionToActive")
                || args[0].equalsIgnoreCase("-transitionToBackup") || args[0].equalsIgnoreCase("-getState"))) {
            writer.write("Not enough arguments: expected 1 but got 0\n");
            writer.flush();
            return;
        }

        CommandLineParser parser = new PosixParser();
        CommandLine cmd = parser.parse(options, args);

        String param = "";
        int cmdType = 0;

        String hostName = null;
        Integer port = null;
        if (cmd.hasOption("h")) {
            hostName = cmd.getOptionValue("h");
        }
        if (cmd.hasOption("p")) {
            port = Integer.parseInt(cmd.getOptionValue("p"));
        }

        if (cmd.hasOption("transitionToActive")) {
            cmdType = 1;
            param = cmd.getOptionValue("transitionToActive");
        } else if (cmd.hasOption("transitionToBackup")) {
            cmdType = 2;
            param = cmd.getOptionValue("transitionToBackup");
        } else if (cmd.hasOption("getState")) {
            cmdType = 3;
            param = cmd.getOptionValue("getState");
        } else if (cmd.hasOption("formatHA")) {
            cmdType = 4;
        }

        // if there is no "-h" option,
        InetSocketAddress address = tajoConf.getSocketAddrVar(TajoConf.ConfVars.TAJO_MASTER_CLIENT_RPC_ADDRESS,
                TajoConf.ConfVars.TAJO_MASTER_UMBILICAL_RPC_ADDRESS);

        if (hostName == null) {
            hostName = address.getHostName();
        }

        if (port == null) {
            port = address.getPort();
        }

        if (cmdType == 0) {
            printUsage();
            return;
        }

        if ((hostName == null) ^ (port == null)) {
            System.err.println("ERROR: cannot find valid Tajo server address");
            return;
        } else if (hostName != null && port != null) {
            tajoConf.setVar(TajoConf.ConfVars.TAJO_MASTER_CLIENT_RPC_ADDRESS,
                    NetUtils.getHostPortString(hostName, port));
        }

        if (!tajoConf.getBoolVar(TajoConf.ConfVars.TAJO_MASTER_HA_ENABLE)) {
            writer.write("HA is not enabled for this tajo cluster.");
        } else {
            switch (cmdType) {
            case 1:
                writer.write("Not Yet Implemented\n");
                break;
            case 2:
                writer.write("Not Yet Implemented\n");
                break;
            case 3:
                getState(writer, param);
                break;
            case 4:
                formatHA(writer);
                break;
            default:
                printUsage();
                break;
            }
        }

        writer.flush();
    }

    private void getState(Writer writer, String param) throws ParseException, IOException, ServiceException {

        int retValue = serviceTracker.getState(param, tajoConf);

        switch (retValue) {
        case 1:
            writer.write("The master is active.\n");
            break;
        case 0:
            writer.write("The master is backup.\n");
            break;
        case -1:
            writer.write("Finding failed. - master:" + param + "\n");
            break;
        default:
            writer.write("Cannot find the master. - master:" + param + "\n");
            break;
        }
    }

    private void formatHA(Writer writer) throws ParseException, IOException, ServiceException {
        int retValue = serviceTracker.formatHA(tajoConf);

        switch (retValue) {
        case 1:
            writer.write("Formatting finished successfully.\n");
            break;
        case 0:
            writer.write("If you want to format the ha information, you must shutdown tajo masters "
                    + " before formatting.\n");
            break;
        default:
            writer.write("Cannot format ha information.\n");
            break;
        }
    }

    public static void main(String[] args) throws Exception {
        TajoConf conf = new TajoConf();

        try (Writer writer = new PrintWriter(System.out)) {
            TajoHAAdmin admin = new TajoHAAdmin(conf, writer);
            admin.runCommand(args);
        } finally {
            System.exit(0);
        }
    }
}