KafkaConfig.java

package jace.shim.springcamp2017.member.config.kafka;

import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.common.serialization.StringDeserializer;
import org.apache.kafka.common.serialization.StringSerializer;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.kafka.annotation.EnableKafka;
import org.springframework.kafka.config.ConcurrentKafkaListenerContainerFactory;
import org.springframework.kafka.core.*;

import java.util.HashMap;
import java.util.Map;

/**
 * Created by jaceshim on 2017. 3. 23..
 */
@Configuration
@EnableKafka
public class KafkaConfig {

	public static final String GROUP_ID = "member-event-group";

	@Value("${kafka.bootstrap.servers}")
	private String kafkaBootstrapServers;


	@Bean
	ConcurrentKafkaListenerContainerFactory<String, String> kafkaListenerContainerFactory() {
		ConcurrentKafkaListenerContainerFactory<String, String> factory = new ConcurrentKafkaListenerContainerFactory<>();
		factory.setConsumerFactory(consumerFactory());
		return factory;
	}

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

	@Bean
	public Map<String, Object> consumerConfigs() {
		Map<String, Object> props = new HashMap<>();
		props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, kafkaBootstrapServers);
		props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
		props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
		props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
		props.put(ConsumerConfig.GROUP_ID_CONFIG, GROUP_ID);

		return props;
	}

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

	@Bean
	public Map<String, Object> producerConfigs() {
		Map<String, Object> props = new HashMap<>();
		props.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, kafkaBootstrapServers);
		props.put(ProducerConfig.ACKS_CONFIG, "all");
		props.put(ProducerConfig.RETRIES_CONFIG, 0);
		props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
		props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
		return props;
	}

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

}