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

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Here is the source code for com.linkedin.pinot.tools.admin.command.StopProcessCommand.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.tools.Command;
import java.io.File;
import java.io.FileReader;
import java.io.FilenameFilter;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import org.apache.commons.lang3.StringUtils;
import org.kohsuke.args4j.Option;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Class for command to stop a process.
 * Relies on pid written by process, and works on local-host only.
 *
 *
 */
public class StopProcessCommand extends AbstractBaseAdminCommand implements Command {
    private static final Logger LOGGER = LoggerFactory.getLogger(StopProcessCommand.class);

    @Option(name = "-controller", required = false, usage = "Stop the PinotController process.")
    private boolean _controller = false;

    @Option(name = "-server", required = false, usage = "Stop the PinotServer process.")
    private boolean _server = false;

    @Option(name = "-broker", required = false, usage = "Stop the PinotBroker process.")
    private boolean _broker = false;

    @Option(name = "-zooKeeper", required = false, usage = "Stop the ZooKeeper process.")
    private boolean _zooKeeper = false;

    @Option(name = "-kafka", required = false, usage = "Stop the Kafka process.")
    private boolean _kafka = false;

    @Option(name = "-help", required = false, help = true, aliases = { "-h", "--h",
            "--help" }, usage = "Stop the PinotServer.")
    private boolean _help = false;

    public StopProcessCommand() {
    }

    public StopProcessCommand(boolean noCleapUpRequired) {
        super(false);
    }

    @Override
    public String description() {
        return "Stop the specified processes.";
    }

    public StopProcessCommand stopController() {
        _controller = true;
        return this;
    }

    public StopProcessCommand stopBroker() {
        _broker = true;
        return this;
    }

    public StopProcessCommand stopServer() {
        _server = true;
        return this;
    }

    public StopProcessCommand stopZookeeper() {
        _zooKeeper = true;
        return this;
    }

    @Override
    public boolean execute() throws Exception {
        LOGGER.info("Executing command: " + toString());

        Map<String, String> processes = new HashMap<String, String>();
        String prefix = System.getProperty("java.io.tmpdir") + File.separator;
        File tempDir = new File(System.getProperty("java.io.tmpdir"));

        if (_server) {
            File[] serverFiles = tempDir.listFiles(new FilenameFilter() {

                @Override
                public boolean accept(File dir, String name) {
                    if (StringUtils.containsIgnoreCase(name, "pinotAdminServer")) {
                        return true;
                    }
                    return false;
                }
            });

            for (File serverFile : serverFiles) {
                processes.put(serverFile.getName(), serverFile.getAbsolutePath());
            }
        }

        if (_broker) {
            File[] serverFiles = tempDir.listFiles(new FilenameFilter() {

                @Override
                public boolean accept(File dir, String name) {
                    if (StringUtils.containsIgnoreCase(name, "pinotAdminBroker")) {
                        return true;
                    }
                    return false;
                }
            });

            for (File serverFile : serverFiles) {
                processes.put(serverFile.getName(), serverFile.getAbsolutePath());
            }
        }

        if (_controller) {
            File[] serverFiles = tempDir.listFiles(new FilenameFilter() {

                @Override
                public boolean accept(File dir, String name) {
                    if (StringUtils.containsIgnoreCase(name, "pinotAdminController")) {
                        return true;
                    }
                    return false;
                }
            });

            for (File serverFile : serverFiles) {
                processes.put(serverFile.getName(), serverFile.getAbsolutePath());
            }
        }

        if (_zooKeeper) {
            processes.put("Zookeeper", prefix + ".zooKeeper.pid");
        }

        if (_kafka) {
            processes.put("Kafka", prefix + ".kafka.pid");
        }

        boolean ret = true;
        for (Map.Entry<String, String> entry : processes.entrySet()) {
            try {
                stopProcess(entry.getValue());
            } catch (Exception e) {
                System.out.println("Failed to stop process: " + entry.getKey() + ": " + e);
                ret = false;
            }
        }

        return ret;
    }

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

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

    @Override
    public String toString() {
        StringBuilder stringBuilder = new StringBuilder("StopProcess");
        if (_controller) {
            stringBuilder.append(" -controller");
        }

        if (_server) {
            stringBuilder.append(" -server");
        }

        if (_broker) {
            stringBuilder.append(" -broker");
        }

        if (_zooKeeper) {
            stringBuilder.append(" -zooKeeper");
        }

        if (_kafka) {
            stringBuilder.append(" -kafka");
        }

        return stringBuilder.toString();
    }

    @Override
    public void cleanup() {

    }

    private boolean stopProcess(String fileName) throws IOException {
        File file = new File(fileName);
        FileReader reader = new FileReader(file);
        int pid = reader.read();

        Runtime.getRuntime().exec("kill " + pid);
        reader.close();

        file.delete();
        return true;
    }
}