我想在Spring Cloud Stream Producers、Consumers和KStreams中自定义Avro模式主题的命名策略。
这将在Kafka中使用属性key.subject.name.strategy和value.subject.name.strategy-> https://docs.confluent.io/current/schema-registry/serializer-formatter.html#subject-name-strategy完成
在一个本地的Kafka Producer中，这是可行的：

private val producer: KafkaProducer<Int, Customer>

    init {
        val props = Properties()
        ...
        props[AbstractKafkaAvroSerDeConfig.SCHEMA_REGISTRY_URL_CONFIG] = "http://localhost:8081"
        props[AbstractKafkaAvroSerDeConfig.VALUE_SUBJECT_NAME_STRATEGY] = TopicRecordNameStrategy::class.java.name
        producer = KafkaProducer(props)
    }

    fun sendCustomerEvent(customer: Customer) {
        val record: ProducerRecord<Int, Customer> = ProducerRecord("customer", customer.id, customer)
        producer.send(record)
    }

但是我在Spring Cloud溪里找不到这个方法。到目前为止，我已经在一个生产者中尝试过了：

spring:
  application:
    name: spring-boot-customer-service
  cloud:
    stream:
      kafka:
        bindings:
          output:
            producer:
              configuration:
                key:
                  serializer: org.apache.kafka.common.serialization.IntegerSerializer
                value:
                  subject:
                    name:
                      strategy: io.confluent.kafka.serializers.subject.TopicRecordNameStrategy

显然，Spring Cloud使用了自己的主题命名策略，接口为org.springframework.cloud.stream.schema.avro.SubjectNamingStrategy，只有一个子类：DefaultSubjectNamingStrategy。
是否有声明式的方式来配置value.subject.name.strategy，或者我们是否需要提供自己的org.springframework.cloud.stream.schema.avro.SubjectNamingStrategy实现和spring.cloud.stream.schema.avro.subject-naming-strategy属性？