一文带您快速入门Kafka

rpm -qa|grep yum

tar -zxvf zookeeper-3.4.6.tar.gz

mkdir data 
mkdir logs

cd conf
cp zoo_sample.cfg zoo.cfg

# ZooKeeper 服务器心跳时间，单位:毫秒
tickTime=2000
# 投票选举新 Leader 的初始化时间
initLimit=10
# Leader 与 Flower 心跳检测最大容忍时间，响应超过 syncLimit*tickTime，就剔除 Flower
syncLimit=5
# 存放数据的文件夹
dataDir=/root/zookeeper-3.4.6/data
# 存放日志的文件夹
dataLogDir=/root/zookeeper-3.4.6/logs
# ZooKeeper提供给接入客户端的连接端口
clientPort=2181
# the maximum number of client connections.
# increase this if you need to handle more clients
#maxClientCnxns=60
#
# Be sure to read the mAIntenance section of the
# administrator guide before turning on autopurge.
#
# http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
#
# The number of snapshots to retain in dataDir
#autopurge.snapRetainCount=3
# Purge task interval in hours
# Set to "0" to disable auto purge feature

cat > myid
vi myid

vi /etc/profile
 export ZOOKEEPER_HOME=/root/zookeeper-3.4.6
export PATH=$PATH:$ZOOKEEPER_HOME/bin

# put dir remoteDir
put D:downloadskafka_2.13-3.5.0.tgz /root/kafka_2.13-3.5.0.tgz

tar -zxvf kafka_2.13-3.5.0.tgz

cd kafka_2.13-3.5.0cd config/

# 是Broker的标识，因此在集群中必需唯一
broker.id=0
# Broker 对外服务地址(我这里vmware的ip是192.168.226.140)
listeners=PLAINTEXT://192.168.226.140:9092
# 实际工作中，会分内网外网，当有需要提供给外部客户端使用时，我们一般 listeners 配置内网供 Broker 之间通信使用，而 advertised.listeners 配置走外网给接入的客户端使用
#advertised.listeners=PLAINTEXT://your.host.name:9092
# 存放消息日志文件地址
log.dirs=/root/kafka_2.13-3.5.0/logs
# ZK 的访问路径，我这里因为 ZK 和 Kafka 放在了同一个服务器上，所以就使用了 localhost
zookeeper.connect=localhost:2181

vi /etc/profile
 export KAFKA_HOME=/root/kafka_2.13-3.5.0
export PATH=$PATH:$KAFKA_HOME/bin

kafka-server-start.sh ../config/server.properties &

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <!-- spring boot3.0+ 只支持jdk17，如果使用1.8出现包冲突需要自己处理 -->
        <version>2.7.12</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example.czl</groupId>
    <artifactId>kafka</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springboot-kafka</name>
    <description>spring boot集成kafka demo</description>
    <properties>
        <JAVA.version>1.8</java.version>
        <MyBatis-plus.version>3.5.3.1</mybatis-plus.version>
        <velocity-engine-core.version>2.3</velocity-engine-core.version>
        <lombok.version>1.18.26</lombok.version>
        <guava.version>31.1-jre</guava.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.kafka</groupId>
            <artifactId>spring-kafka</artifactId>
        </dependency>

        <dependency>
            <groupId>com.MySQL</groupId>
            <artifactId>mysql-connector-j</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.kafka</groupId>
            <artifactId>spring-kafka-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <artifactId>scala-library</artifactId>
                    <groupId>org.scala-lang</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>scala-reflect</artifactId>
                    <groupId>org.scala-lang</groupId>
                </exclusion>
            </exclusions>
        </dependency>

        <!-- mybatis-plus -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>${mybatis-plus.version}</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>${mybatis-plus.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.velocity</groupId>
            <artifactId>velocity-engine-core</artifactId>
            <version>${velocity-engine-core.version}</version>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>${lombok.version}</version>
        </dependency>

        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>${guava.version}</version>
        </dependency>
    </dependencies>

    <!-- 对于一些特殊的依赖指定特定版本 -->
    <!--<dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.yaml</groupId>
                <artifactId>snakeyaml</artifactId>
                <version>2.0</version>
            </dependency>
        </dependencies>
    </dependencyManagement>-->

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

spring:
  application:
    name: spring-boot-kafka
  profiles:
    active: dev

server:
  port: 8080

spring:
  datasource:
    url: "jdbc:mysql://***:***/***?useSSL=false&useUnicode=true&characterEncoding=utf8&ApplicationName=spring-boot-demo&serverTimezone=UTC&allowMultiQueries=true"
    username: "***"
    password: "***"
  kafka:
    bootstrap-servers: "192.168.226.140:9092" # 访问Kafka服务端的地址
    consumer:
      group-id: ${spring.application.name}-${spring.profiles.active} # 一条消息只会被订阅了该主题的同一个分组内的一个消费者消费

mybatis-plus:
  configuration:
    # 打印sql
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <property name="LOG_PATH_HOME" value="./logs/spring-boot-kafka"/>
    <property name="LOG_LEVEL" value="INFO"/>

    <!-- 日志文件布局 -->
    <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36}(%L) - [%X{traceId}] %msg%n</pattern>
        </encoder>
        <!-- 按时间大小归档日志 -->
        <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
            <FileNamePattern>${LOG_PATH_HOME}/log.%d{yyyy-MM-dd}.%i.log</FileNamePattern>
            <maxFileSize>200MB</maxFileSize>
        </rollingPolicy>
    </appender>

    <!-- 控制台日志布局 -->
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <Pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36}(%L) - [%X{traceId}] %msg%n</Pattern>
        </encoder>
    </appender>

    <logger name="org.springframework.web.filter.CommonsRequestLoggingFilter" level="INFO"/>
    <logger name="org.springframework" level="INFO"/>
    <logger name="com.czl.demo" level="${LOG_LEVEL}"/>
    <root level="${LOG_LEVEL}">
        <appender-ref ref="FILE"/>
        <appender-ref ref="STDOUT"/>
    </root>
</configuration>

import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.kafka.support.SendResult;
import org.springframework.stereotype.Component;
import org.springframework.util.concurrent.ListenableFuture;
import org.springframework.util.concurrent.ListenableFutureCallback;

/**
 * @author CaiZhuliang
 * @date 2023/6/18
 */
@Slf4j
@Component
@RequiredArgsConstructor
public class ProducerDemo {
    private final KafkaTemplate<String, String> kafkaTemplate;

    /**
     * 发送消息
     * @param topic 主题
     * @param msg 消息
     * @param callback 钩子
     */
    public void send(String topic, String msg, ListenableFutureCallback<SendResult<String, String>> callback) {
        log.info("发送Kafka消息 - topic : {}, msg : {}", topic, msg);
        ListenableFuture<SendResult<String, String>> future = kafkaTemplate.send(topic, msg);
        if (null != callback) {
            future.addCallback(callback);
        }
    }
}

package com.example.czl.kafka.kafka.producer.consumer;

import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.kafka.annotation.KafkaListener;
import org.springframework.stereotype.Component;

/**
 * @author CaiZhuliang
 * @date 2023/6/18
 */
@Slf4j
@Component
@RequiredArgsConstructor
public class ConsumerDemo {
    @KafkaListener(topics = "test-topic-1")
    public void receivingMsg(String msg) {
        log.info("接收到Kafka消息 - msg : {}", msg);
    }
}

package com.example.czl.kafka.controller;

import com.example.czl.kafka.kafka.producer.ProducerDemo;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author CaiZhuliang
 * @date 2023/6/18
 */
@Slf4j
@RestController
@RequiredArgsConstructor
@RequestMapping("/test")
public class TestController {
    private final ProducerDemo producerDemo;

    @GetMapping("/send/kafka_msg")
    public Long sendMsg(String msg) {
        log.info("测试发送kafka消息 - msg : {}", msg);
        producerDemo.send("test-topic-1", msg, null);
        return System.currentTimeMillis();
    }
}