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add kafka consumer

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This commit is contained in:
Denis Savosin
2024-10-02 18:16:51 +07:00
parent 568989917f
commit f6211ea5d3
9 changed files with 61 additions and 39 deletions
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50
src/main/kotlin/com/example/demo/config/KafkaConsumerConfig.kt
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@@ -1,18 +1,17 @@
package com.example.demo.config
import com.example.demo.services.kafka.dto.CityCreateDto
import com.example.demo.services.database.city.CityService
import com.example.demo.services.kafka.Consumer
import com.fasterxml.jackson.databind.ObjectMapper
import org.apache.kafka.clients.consumer.ConsumerConfig
import org.apache.kafka.common.serialization.StringDeserializer
import org.springframework.beans.factory.annotation.Autowired
import org.springframework.beans.factory.annotation.Value
import org.springframework.context.annotation.Bean
import org.springframework.context.annotation.Configuration
import org.springframework.kafka.config.ConcurrentKafkaListenerContainerFactory
import org.springframework.kafka.core.ConsumerFactory
import org.springframework.kafka.core.DefaultKafkaConsumerFactory
import org.springframework.kafka.support.converter.RecordMessageConverter
import org.springframework.kafka.support.converter.StringJsonMessageConverter
import org.springframework.kafka.support.mapping.DefaultJackson2JavaTypeMapper
import org.springframework.kafka.support.mapping.Jackson2JavaTypeMapper
@Configuration
class KafkaConsumerConfig(
@@ -21,18 +20,23 @@ class KafkaConsumerConfig(
@Value("\${kafka.consumer.group-id}")
val consumerGroup: String,
) {
// @Bean
// fun consumer(@Autowired cityService: CityService): Consumer = Consumer(
// cityService = cityService,
// )
@Bean
fun consumer(
@Autowired cityService: CityService,
@Autowired objectMapper: ObjectMapper,
): Consumer = Consumer(
cityService = cityService,
objectMapper = objectMapper,
)
@Bean
fun consumerFactory(): ConsumerFactory<String, String> {
val configs = HashMap<String, Any>()
configs[ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG] = servers
configs[ConsumerConfig.GROUP_ID_CONFIG] = consumerGroup
configs[ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG] = StringDeserializer::class.java
configs[ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG] = StringDeserializer::class.java
val configs = mapOf(
ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG to servers,
ConsumerConfig.GROUP_ID_CONFIG to consumerGroup,
ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG to StringDeserializer::class.java,
ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG to StringDeserializer::class.java,
)
return DefaultKafkaConsumerFactory(configs)
}
@@ -41,25 +45,7 @@ class KafkaConsumerConfig(
fun kafkaListenerContainerFactory(): ConcurrentKafkaListenerContainerFactory<String, String> {
val factory = ConcurrentKafkaListenerContainerFactory<String, String>()
factory.consumerFactory = consumerFactory()
factory.setRecordMessageConverter(recordMessageConverter())
return factory
}
@Bean
fun recordMessageConverter(): RecordMessageConverter {
val converter = StringJsonMessageConverter()
val typeMapper = DefaultJackson2JavaTypeMapper()
typeMapper.typePrecedence = Jackson2JavaTypeMapper.TypePrecedence.TYPE_ID
typeMapper.addTrustedPackages("com.baeldung.spring.kafka")
val mappings: MutableMap<String, Class<*>> = HashMap()
mappings["city"] = CityCreateDto::class.java
typeMapper.idClassMapping = mappings
converter.typeMapper = typeMapper
return converter
}
}