com.linkedin.pinot.tools.admin.command.StartZookeeperCommand.java Source code

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Here is the source code for com.linkedin.pinot.tools.admin.command.StartZookeeperCommand.java

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/**
 * Copyright (C) 2014-2016 LinkedIn Corp. (pinot-core@linkedin.com)
 *
 * 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.linkedin.pinot.tools.admin.command;

import com.linkedin.pinot.common.utils.ZkStarter;
import com.linkedin.pinot.tools.Command;
import java.io.File;
import java.io.IOException;

import org.I0Itec.zkclient.IDefaultNameSpace;
import org.I0Itec.zkclient.ZkServer;
import org.apache.commons.io.FileUtils;
import org.kohsuke.args4j.Option;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.io.Files;

/**
 * Class for command to start ZooKeeper.
 *
 *
 */
public class StartZookeeperCommand extends AbstractBaseAdminCommand implements Command {
    private static final Logger LOGGER = LoggerFactory.getLogger(StartZookeeperCommand.class);

    @Option(name = "-zkPort", required = false, metaVar = "<int>", usage = "Port to start zookeeper server on.")
    private int _zkPort = 2181;

    @Option(name = "-dataDir", required = false, metaVar = "<string>", usage = "Directory for zookeper data.")
    private String _dataDir = TMP_DIR + "PinotAdmin/zkData";

    @Option(name = "-help", required = false, help = true, aliases = { "-h", "--h",
            "--help" }, usage = "Print this message.")
    private boolean _help = false;

    @Override
    public boolean getHelp() {
        return _help;
    }

    @Override
    public String getName() {
        return "StartZookeeper";
    }

    @Override
    public String toString() {
        return ("StartZookeeper -zkPort " + _zkPort + " -dataDir " + _dataDir);

    }

    @Override
    public void cleanup() {
        if (_tmpdir != null) {
            try {
                FileUtils.deleteDirectory(_tmpdir);
            } catch (IOException e) {
                // Nothing to do right now.
            }
        }
    }

    @Override
    public String description() {
        return "Start the Zookeeper process at the specified port.";
    }

    StartZookeeperCommand setPort(int port) {
        _zkPort = port;
        return this;
    }

    StartZookeeperCommand setDataDir(String dataDir) {
        _dataDir = dataDir;
        return this;
    }

    private ZkStarter.ZookeeperInstance _zookeeperInstance;
    private File _tmpdir;

    public void init(int zkPort, String dataDir) {
        _zkPort = zkPort;
        _dataDir = dataDir;
    }

    @Override
    public boolean execute() throws IOException {
        LOGGER.info("Executing command: " + toString());
        _tmpdir = createAutoDeleteTempDir();

        File logdir = new File(_tmpdir + File.separator + "translog");
        File datadir = new File(_tmpdir + File.separator + "snapshot");

        IDefaultNameSpace _defaultNameSpace = new IDefaultNameSpace() {
            @Override
            public void createDefaultNameSpace(org.I0Itec.zkclient.ZkClient zkClient) {
                // init any zk paths if needed
            }
        };

        _zookeeperInstance = ZkStarter.startLocalZkServer(_zkPort, datadir.getAbsolutePath());

        LOGGER.info("Start zookeeper at localhost:" + _zkPort + " in thread " + Thread.currentThread().getName());

        savePID(System.getProperty("java.io.tmpdir") + File.separator + ".zooKeeper.pid");
        return true;
    }

    public static File createAutoDeleteTempDir() {
        File tempdir = Files.createTempDir();
        tempdir.delete();
        tempdir.mkdir();

        tempdir.deleteOnExit();
        return tempdir;
    }

    public boolean stop() {
        ZkStarter.stopLocalZkServer(_zookeeperInstance);
        return true;
    }

    public static void main(String[] args) throws Exception {
        StartZookeeperCommand zkc = new StartZookeeperCommand();
        zkc.execute();
    }
}