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[英]Spring cloud stream custom binder not registered. Disables the kafka binder if used @Configuration
[英]Spring-Cloud-Stream-Kafka-Binder functional style ignores custom De/Serializer and/or useNativeEncoding?
我們剛剛升級到Spring-Cloud-Stream 3.0.0-Release,遇到以下問題:
當使用這樣的功能樣式時:
public class EventProcessor {
private final PriceValidator priceValidator;
@Bean
public Function<Flux<EnrichedValidationRequest>, Flux<ValidationResult>> validate() {
return enrichedValidationRequestFlux -> enrichedValidationRequestFlux
.map(ProcessingContext::new)
.flatMap(priceValidator::validateAndMap);
}
}
application.yaml 看起來像這樣:
spring.cloud.stream:
default-binder: kafka
kafka:
binder:
brokers: ${kafka.broker.prod}
auto-create-topics: false
function.definition: validate
# INPUT: enrichedValidationRequests
spring.cloud.stream.bindings.validate-in-0:
destination: ${kafka.topic.${spring.application.name}.input.enrichedValidationRequests}
group: ${spring.application.name}.${STAGE:NOT_SET}
consumer:
useNativeDecoding: true
spring.cloud.stream.kafka.bindings.validate-in-0:
consumer:
configuration:
key.deserializer: org.apache.kafka.common.serialization.StringDeserializer
value.deserializer: de.pricevalidator.deserializer.EnrichedValidationRequestDeserializer
# OUTPUT: validationResults
spring.cloud.stream.bindings.validate-out-0:
destination: validationResultsTmp
producer:
useNativeEncoding: true
spring.cloud.stream.kafka.bindings.validate-out-0:
producer:
compression.type: lz4
messageKeyExpression: payload.offerKey
configuration:
key.serializer: org.apache.kafka.common.serialization.StringSerializer
value.serializer: de.pricevalidator.serializer.ValidationResultSerializer
似乎序列化完成了兩次——當我們攔截在 kafka 主題中生成的消息時,消費者只會將它們顯示為 JSON(字符串),但現在它是一個不可讀的字節 []。 此外,生產中的下游消費者不能再對消息進行反序列化。 奇怪的是,輸入消息的反序列化似乎工作得很好,無論我們在消費者屬性中放入什么(在綁定器或默認 kafka 級別)我們有一種感覺,這個錯誤“回來了”,但我們不能在代碼中找到確切的位置:https ://github.com/spring-cloud/spring-cloud-stream/issues/1536
我們的(丑陋的)解決方法:
@Slf4j
@Configuration
public class KafkaMessageConverterConfiguration {
@ConditionalOnProperty(value = "spring.cloud.stream.default-binder", havingValue = "kafka")
@Bean
public MessageConverter validationResultConverter(BinderTypeRegistry binder, ObjectMapper objectMapper) {
return new AbstractMessageConverter(MimeType.valueOf("application/json")) {
@Override
protected boolean supports(final Class<?> clazz) {
return ValidationResult.class.isAssignableFrom(clazz);
}
@Override
protected Object convertToInternal(final Object payload, final MessageHeaders headers, final Object conversionHint) {
return payload;
}
};
}
}
是否有一種“正確”的方式來設置自定義序列化程序或像以前一樣獲取本機編碼?
所以這是一個在 3.0.0.RELEASE - https://github.com/spring-cloud/spring-cloud-stream/commit/74aee8102898dbff96a570d2d2624571b259e141之后報告的問題。 它已得到解決,幾天后將在 3.0.1.RELEASE (Horsham.SR1) 中可用。
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