我正在尝试使用Spring Cloud Stream与Kafka集成 . 正在编写的消息是Java POJO,虽然它按预期工作(消息正在写入主题,我可以使用消费者应用程序读取),但是在消息的开头添加了一些未知的字符尝试集成Kafka Connect以接收来自主题的消息时出现问题 .
使用默认设置,这是推送到Kafka的消息:
contentType "text/plain"originalContentType "application/json;charset=UTF-8"{"payload":{"username":"john"},"metadata":{"eventName":"Login","sessionId":"089acf50-00bd-47c9-8e49-dc800c1daf50","username":"john","hasSent":null,"createDate":1511186145471,"version":null}}
如果我在Java应用程序中配置Kafka生成器,则消息将写入主题而不包含前导字符/ Headers :
@Configuration
public class KafkaProducerConfig {
@Bean
public ProducerFactory<String, Object> producerFactory() {
Map<String, Object> configProps = new HashMap<>();
configProps.put(
ProducerConfig.BOOTSTRAP_SERVERS_CONFIG,
"localhost:9092");
configProps.put(
ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG,
StringSerializer.class);
configProps.put(
ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG,
JsonSerializer.class);
return new DefaultKafkaProducerFactory<String, Object>(configProps);
}
@Bean
public KafkaTemplate<String, Object> kafkaTemplate() {
return new KafkaTemplate<>(producerFactory());
}
}
关于 Kafka 的消息:
{"payload":{"username":"john"},"metadata":{"eventName":"Login","sessionId":"089acf50-00bd-47c9-8e49-dc800c1daf50","username":"john","hasSent":null,"createDate":1511186145471}
由于我希望能够在 application.yml
属性文件中执行此操作,而不是通过代码执行此操作 . 但是,当更新yml以指定序列化程序时,它's not working as I would expect i.e. it's不会生成与Java中配置的生成器相同的消息(上面):
spring:
profiles: local
cloud:
stream:
bindings:
session:
destination: session
contentType: application/json
kafka:
binder:
brokers: localhost
zkNodes: localhost
defaultZkPort: 2181
defaultBrokerPort: 9092
bindings:
session:
producer:
configuration:
value:
serializer: org.springframework.kafka.support.serializer.JsonSerializer
key:
serializer: org.apache.kafka.common.serialization.StringSerializer
关于 Kafka 的消息:
"/wILY29udGVudFR5cGUAAAAMInRleHQvcGxhaW4iE29yaWdpbmFsQ29udGVudFR5cGUAAAAgImFwcGxpY2F0aW9uL2pzb247Y2hhcnNldD1VVEYtOCJ7InBheWxvYWQiOnsidXNlcm5hbWUiOiJqb2huIn0sIm1ldGFkYXRhIjp7ImV2ZW50TmFtZSI6IkxvZ2luIiwic2Vzc2lvbklkIjoiNGI3YTBiZGEtOWQwZS00Nzg5LTg3NTQtMTQyNDUwYjczMThlIiwidXNlcm5hbWUiOiJqb2huIiwiaGFzU2VudCI6bnVsbCwiY3JlYXRlRGF0ZSI6MTUxMTE4NjI2NDk4OSwidmVyc2lvbiI6bnVsbH19"
是否可以通过应用程序yml单独配置它?是否有其他缺少的设置?
2 回答
请参阅 生产环境 者属性(
....session.producer.useNativeEncoding
)中的headerMode
和useNativeEncoding
.感谢@Gary获得上述答案!
为了完整起见,现在正在为我工作的配置如下 .