com.linkedin.pinot.common.utils.KafkaStarterUtils.java Source code

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Here is the source code for com.linkedin.pinot.common.utils.KafkaStarterUtils.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.common.utils;

import java.io.File;
import java.security.Permission;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import org.I0Itec.zkclient.ZkClient;
import org.apache.commons.io.FileUtils;
import kafka.admin.TopicCommand;
import kafka.server.KafkaConfig;
import kafka.server.KafkaServerStartable;

/**
 * Utilities to start Kafka during unit tests.
 *
 */
public class KafkaStarterUtils {
    public static final int DEFAULT_KAFKA_PORT = 19092;
    public static final int DEFAULT_BROKER_ID = 0;
    public static final String DEFAULT_ZK_STR = ZkStarter.DEFAULT_ZK_STR + "/kafka";
    public static final String DEFAULT_KAFKA_BROKER = "localhost:" + DEFAULT_KAFKA_PORT;

    public static Properties getDefaultKafkaConfiguration() {
        final Properties configuration = new Properties();

        // Enable topic deletion by default for integration tests
        configureTopicDeletion(configuration, true);

        // Set host name
        configureHostName(configuration, "localhost");

        return configuration;
    }

    public static List<KafkaServerStartable> startServers(final int brokerCount, final int port, final String zkStr,
            final Properties configuration) {
        List<KafkaServerStartable> startables = new ArrayList<>(brokerCount);

        for (int i = 0; i < brokerCount; i++) {
            startables.add(startServer(port + i, i, zkStr, "/tmp/kafka-" + Double.toHexString(Math.random()),
                    configuration));
        }

        return startables;
    }

    public static KafkaServerStartable startServer(final int port, final int brokerId, final String zkStr,
            final Properties configuration) {
        return startServer(port, brokerId, zkStr, "/tmp/kafka-" + Double.toHexString(Math.random()), configuration);
    }

    public static KafkaServerStartable startServer(final int port, final int brokerId, final String zkStr,
            final String logDirPath, final Properties configuration) {
        // Create the ZK nodes for Kafka, if needed
        int indexOfFirstSlash = zkStr.indexOf('/');
        if (indexOfFirstSlash != -1) {
            String bareZkUrl = zkStr.substring(0, indexOfFirstSlash);
            String zkNodePath = zkStr.substring(indexOfFirstSlash);
            ZkClient client = new ZkClient(bareZkUrl);
            client.createPersistent(zkNodePath, true);
            client.close();
        }

        File logDir = new File(logDirPath);
        logDir.mkdirs();

        configureKafkaPort(configuration, port);
        configureZkConnectionString(configuration, zkStr);
        configureBrokerId(configuration, brokerId);
        configureKafkaLogDirectory(configuration, logDir);
        configuration.put("zookeeper.session.timeout.ms", "60000");
        KafkaConfig config = new KafkaConfig(configuration);

        KafkaServerStartable serverStartable = new KafkaServerStartable(config);
        serverStartable.startup();

        return serverStartable;
    }

    public static void configureSegmentSizeBytes(Properties properties, int segmentSize) {
        properties.put("log.segment.bytes", Integer.toString(segmentSize));
    }

    public static void configureLogRetentionSizeBytes(Properties properties, int logRetentionSizeBytes) {
        properties.put("log.retention.bytes", Integer.toString(logRetentionSizeBytes));
    }

    public static void configureKafkaLogDirectory(Properties configuration, File logDir) {
        configuration.put("log.dirs", logDir.getAbsolutePath());
    }

    public static void configureBrokerId(Properties configuration, int brokerId) {
        configuration.put("broker.id", Integer.toString(brokerId));
    }

    public static void configureZkConnectionString(Properties configuration, String zkStr) {
        configuration.put("zookeeper.connect", zkStr);
    }

    public static void configureKafkaPort(Properties configuration, int port) {
        configuration.put("port", Integer.toString(port));
    }

    public static void configureTopicDeletion(Properties configuration, boolean topicDeletionEnabled) {
        configuration.put("delete.topic.enable", Boolean.toString(topicDeletionEnabled));
    }

    public static void configureHostName(Properties configuration, String hostName) {
        configuration.put("host.name", hostName);
    }

    public static void stopServer(KafkaServerStartable serverStartable) {
        serverStartable.shutdown();
        FileUtils.deleteQuietly(new File(serverStartable.serverConfig().logDirs().apply(0)));
    }

    public static void createTopic(String kafkaTopic, String zkStr, int partitionCount) {
        invokeTopicCommand(new String[] { "--create", "--zookeeper", zkStr, "--replication-factor", "1",
                "--partitions", Integer.toString(partitionCount), "--topic", kafkaTopic });
    }

    private static void invokeTopicCommand(String[] args) {
        // jfim: Use Java security to trap System.exit in Kafka 0.9's TopicCommand
        System.setSecurityManager(new SecurityManager() {
            @Override
            public void checkPermission(Permission perm) {
                if (perm.getName().startsWith("exitVM")) {
                    throw new SecurityException("System.exit is disabled");
                }
            }

            @Override
            public void checkPermission(Permission perm, Object context) {
                checkPermission(perm);
            }
        });

        try {
            TopicCommand.main(args);
        } catch (SecurityException ex) {
            // Do nothing, this is caused by our security manager that disables System.exit
        }

        System.setSecurityManager(null);
    }

    public static void deleteTopic(String kafkaTopic, String zkStr) {
        invokeTopicCommand(new String[] { "--delete", "--zookeeper", zkStr, "--topic", kafkaTopic });
    }
}