Kafka学习实践（Windows10）1. 官方资料官方文档 https://kafka.apache.org/ 下

1. 官方资料

官方文档

kafka.apache.org/

下载地址

kafka.apache.org/downloads

2. 单机模式

2.1. 部署

2.1.1. 解压

2.1.2. 修改配置

# 端口
listeners=PLAINTEXT://localhost:9092

# 日志地址
log.dirs=D:\work\kafka_2.12-3.8.0\logs

# 协调组件zookeeper地址
zookeeper.connect=localhost:2181

2.1.3. 服务启动

2.1.3.1. 启动zookeeper

启动脚本 + 配置文件

2.1.3.2. 启动Kafka

启动脚本 + 配置文件

2.2. 基础命令

2.2.1. Topic

2.2.1.1. 查看Topic

kafka-topic --bootstrap-server localhost:9092 --list

2.2.1.2. 创建Topic

kafka-topics --bootstrap-server localhost:9092 --create --partitions 1 --replication-factor 1 --topic topic11

注意：副本数<=broker数，分区数<=副本数

2.2.2. 控制台

生产：kafka-console-producer --bootstrap-server localhost:9092 --topic topic11

消费：kafka-console-consumer --bootstrap-server localhost:9092 --topic topic11 --from-beginning

2.3. Java Kafka

2.3.1. pom

<dependency>
  <groupId>org.apache.kafka</groupId>
  <artifactId>kafka-clients</artifactId>
  <version>2.8.0</version>
</dependency>

2.3.2. SimpleProducer

import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.clients.producer.ProducerRecord;

import java.util.Properties;

public class SimpleProducer {

    public static void main(String[] args) throws InterruptedException {
        Properties prop = new Properties();
        //kafka地址
        prop.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092");
        //序列化
        prop.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringSerializer");
        prop.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringSerializer");
        //生产的topic_name
        String topic = "topic11";
        //创建topic
        KafkaProducer<String, String> producer = new KafkaProducer<>(prop);
        //发送消息
        for (int i = 0; i < 100; i++) {
            producer.send(new ProducerRecord<>(topic, "hello kafka" + i));
            System.out.println("生产消息：" + i);
            Thread.sleep(200);
        }
        producer.close();
    }

}

2.3.3. SimpleConsumer

import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.KafkaConsumer;

import java.time.Duration;
import java.util.Arrays;
import java.util.Properties;

public class SimpleConsumer {

    public static void main(String[] args) {
        Properties prop = new Properties();
        //kafka地址
        prop.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092");
        prop.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringDeserializer");
        prop.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringDeserializer");
        //消费者组
        prop.put(ConsumerConfig.GROUP_ID_CONFIG, "topic11_group_1");

        KafkaConsumer<String, String> consumer = new KafkaConsumer<>(prop);
        consumer.subscribe(Arrays.asList("topic11"));
        while (true) {
            ConsumerRecords<String, String> records = consumer.poll(Duration.ofMillis(100));
            for (ConsumerRecord<String, String> record : records) {
                System.out.printf("partition = %d, offset = %d, key = %s, value = %s%n", record.partition(), record.offset(), record.key(), record.value());
            }
        }
    }

}

3. 伪集群

3.1. 部署

3.1.1. 规划

zookeeper：localhost:4181

kafka：localhost:9092,localhost:9093,localhost:9094

3.1.2. 部署

3.1.2.1. zookeeper

## 数据文件位置
dataDir=D:\work\zookeeper\data

## 端口
clientPort=4181

3.1.2.2. kafka

解压一次后复制两份，然后重命名，之后修改每一项的配置文件server.properties

kafka_1

## id
broker.id=1

## 服务地址
listeners=PLAINTEXT://localhost:9092

## 日志位置
log.dirs=D:\work\kafka\logs\1

## 注册zookeeper地址
zookeeper.connect=localhost:4181

kafka_2

## id
broker.id=2

## 服务地址
listeners=PLAINTEXT://localhost:9093

## 日志位置
log.dirs=D:\work\kafka\logs\2

## 注册zookeeper地址
zookeeper.connect=localhost:4181

kafka_3

## id
broker.id=3

## 服务地址
listeners=PLAINTEXT://localhost:9094

## 日志位置
log.dirs=D:\work\kafka\logs\3

## 注册zookeeper地址
zookeeper.connect=localhost:4181

Kafka学习实践（Windows10）