springboot2整合kafka

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/u013219624/article/details/84944780

1.kafka安装启动

wget http://mirror.bit.edu.cn/apache/kafka/2.1.0/kafka_2.11-2.1.0.tgz 
tar -zvxf kafka_2.11-2.1.0.tgz
cd kafka_2.11-2.1.0

# 先启动zookeeper
nohup bin/zookeeper-server-start.sh config/zookeeper.properties &
jps 查看是否启动成功（或者使用ps -ef | grep zookeeper）

# 再启动kafka
nohup bin/kafka-server-start.sh config/server.properties &
jsp 查看是否启动成功（或者使用ps -ef | grep kafka）

2.topic操作

# 查看所有topic
bin/kafka-topics.sh --list --zookeeper 172.22.2.133:2181

# 创建topic(replication-factor<=broker  partitions可以随意吧)
bin/kafka-topics.sh --create --zookeeper 172.22.2.133:2181 --replication-factor 1 --partitions 3 --topic mytopic

# 查看topic详情
bin/kafka-topics.sh --describe --zookeeper 172.22.2.133:2181
    Topic: mytopic	Partition: 0	Leader: 0	Replicas: 0	Isr: 0
    Topic: mytopic	Partition: 1	Leader: 0	Replicas: 0	Isr: 0
    Topic: mytopic	Partition: 2	Leader: 0	Replicas: 0	Isr: 0
    (topic主题名称 Partition分区编号 Leader所在broker节点 Replicas备份所在节点 Isr可用节点)

# 删除topic(delete.topic.enable)
bin/kafka-topics.sh --delete --zookeeper 172.22.2.133:2181 --topic mytopic

（还有update之类的 不说了）

3.生产者消费者

# 启动生产者
bin/kafka-console-producer.sh --broker-list 172.22.2.133:9092 --topic mytopic

# 启动消费者
bin/kafka-console-consumer.sh --bootstrap-server 172.22.2.133:9092 --topic mytopic --from-beginning

（自己可以玩一波）

4.整合kafka, maven依赖

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

5.生产者配置

# producer.properties
kafka.producer.servers=172.22.2.133:9092
kafka.producer.retries=0
kafka.producer.batch.size=4096
kafka.producer.linger=1
kafka.producer.buffer.memory=40960

# KafkaProducerConfig.java
@Configuration
@PropertySource(value = "classpath:producer.properties", ignoreResourceNotFound = true)
public class KafkaProducerConfig {
    @Value("${kafka.producer.servers}")
    private String servers;

    @Value("${kafka.producer.retries}")
    private int retries;

    @Value("${kafka.producer.batch.size}")
    private int batchSize;

    @Value("${kafka.producer.linger}")
    private int linger;

    @Value("${kafka.producer.buffer.memory}")
    private int bufferMemory;

    public Map<String, Object> producerProperties() {
        Map<String, Object> props = new HashMap<>(8);
        props.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, servers);
        props.put(ProducerConfig.RETRIES_CONFIG, retries);
        props.put(ProducerConfig.BATCH_SIZE_CONFIG, batchSize);
        props.put(ProducerConfig.LINGER_MS_CONFIG, linger);
        props.put(ProducerConfig.BUFFER_MEMORY_CONFIG, bufferMemory);
        props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
        props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
        return props;
    }

    @Bean
    public ProducerFactory<String, String> producerFactory() {
        return new DefaultKafkaProducerFactory<>(producerProperties());
    }

    @Bean
    public KafkaTemplate<String, String> kafkaTemplate(ProducerFactory<String, String> producerFactory) {
        return new KafkaTemplate<>(producerFactory);
    }
}

6.消费者配置

# consumer.properties
kafka.consumer.servers=172.22.2.133:9092
kafka.consumer.enable.auto.commit=true
kafka.consumer.session.timeout=6000
kafka.consumer.auto.commit.interval=100
kafka.consumer.auto.offset.reset=earliest
kafka.consumer.group.id=topic_tt_test

# KafkaConsumerConfig.java
@Configuration
@PropertySource(value = "classpath:consumer.properties", ignoreResourceNotFound = true)
public class KafkaConsumerConfig {
    @Value("${kafka.consumer.servers}")
    private String servers;

    @Value("${kafka.consumer.enable.auto.commit}")
    private boolean enableAutoCommit;

    @Value("${kafka.consumer.session.timeout}")
    private String sessionTimeout;

    @Value("${kafka.consumer.auto.commit.interval}")
    private String autoCommitInterval;

    @Value("${kafka.consumer.group.id}")
    private String groupId;

    @Value("${kafka.consumer.auto.offset.reset}")
    private String autoOffsetReset;

    public Map<String, Object> consumerProperties() {
        Map<String, Object> propsMap = new HashMap<>(8);
        propsMap.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, servers);
        propsMap.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG, enableAutoCommit);
        propsMap.put(ConsumerConfig.AUTO_COMMIT_INTERVAL_MS_CONFIG, autoCommitInterval);
        propsMap.put(ConsumerConfig.SESSION_TIMEOUT_MS_CONFIG, sessionTimeout);
        propsMap.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
        propsMap.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
        propsMap.put(ConsumerConfig.GROUP_ID_CONFIG, groupId);
        propsMap.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, autoOffsetReset);
        return propsMap;
    }

    @Bean
    public ConsumerFactory<String, String> consumerFactory() {
        return new DefaultKafkaConsumerFactory<>(consumerProperties());
    }

    @Bean
    public KafkaListenerContainerFactory<ConcurrentMessageListenerContainer<String, String>> kafkaListenerContainerFactory(ConsumerFactory<String, String> consumerFactory) {
        ConcurrentKafkaListenerContainerFactory<String, String> factory = new ConcurrentKafkaListenerContainerFactory<>();
        factory.setConsumerFactory(consumerFactory);
        factory.getContainerProperties().setPollTimeout(1500);
        return factory;
    }
}

7.生产者和消费者实现

# 生产者
@Component
public class KafkaProducer {
    @Autowired
    private KafkaTemplate<String,String> kafkaTemplate;

    public void sendMessage(String topic, String message){
        kafkaTemplate.send(topic, message);
    }
}

# 消费者
@Component
public class KafkaConsumer {
    @KafkaListener(topics = {KafkaConstants.MY_TOPIC})
    public void receiveMessage(String message){
        System.out.println("message" + message);
    }
}

8.测试

@RunWith(SpringRunner.class)
@SpringBootTest
public class DemoApplicationTests {

    @Autowired
    private KafkaProducer kafkaProducer;

	@Test
	public void test() {
	    for (int index = 0; index < 10; index ++) {
            kafkaProducer.sendMessage(KafkaConstants.MY_TOPIC, "test" + index);
        }
	}
}

9.总结

这里的整合只是kafka皮毛, 还有很多很深入的东西，没时间看！毕竟Java的东西太多了，只能平时用到再去研究了！

源码：https://gitee.com/jsjack_wang/springboot-demo dev-kafka分支