kafka初使用

 

使用前準備

下載kafka，地址http://mirror.bit.edu.cn/apache/kafka/2.2.0/kafka_2.12-2.2.0.tgz

解壓

啓動ZooKeeper

bin/zookeeper-server-start.sh config/zookeeper.properties

啓動kafka

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

windows啓動方式

.\bin\windows\zookeeper-server-start.bat .\config\zookeeper.properties 
.\bin\windows\kafka-server-start.bat .\config\server.properties

 

項目配置

1，maven

 <dependency>
    <groupId>org.springframework.kafka</groupId>
    <artifactId>spring-kafka</artifactId>
    <version>2.2.6.RELEASE</version>
</dependency>

 

2，yml配置

spring:
  kafka:
    bootstrap-servers: 127.0.0.1:9092
    producer:
      acks: all
      retries: 0
      batch-size: 16384
      buffer-memory: 33554432
      key-serializer: org.apache.kafka.common.serialization.StringSerializer
      value-serializer: org.apache.kafka.common.serialization.StringSerializer
    consumer:
      group-id: group-001
      enable-auto-commit: true
      auto-commit-interval: 60s
      auto-offset-reset: earliest
      key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
      value-deserializer: org.apache.kafka.common.serialization.StringDeserializer

 

3，消息生產者

@Component
public class MyKafkaProducer {

    private final KafkaTemplate<String, String> kafkaTemplate;

    @Autowired
    public MyKafkaProducer(KafkaTemplate<String, String> kafkaTemplate) {
        this.kafkaTemplate = kafkaTemplate;
    }

    public void sendMsg(Object t, String topic) {
        String s = JSON.toJSONString(t);
        sendMsg(s, topic);
    }

    public void sendMsg(String t, String topic) {
        kafkaTemplate.send(new ProducerRecord<>(topic, t));
    }
}

 

4，消息消費者

@KafkaListener(topics = {"your topic"})
public void receiveMsg(String msg) {
    System.out.println(msg);
}