基于 Spring functional 的Secured Kafka (kerberos) configuration

#input
spring.cloud.stream.bindings.process-in-0.destination=input-topic
spring.cloud.stream.bindings.process-in-0.binder=kafka1
spring.cloud.stream.bindings.process-in-0.group=groupId1
spring.cloud.stream.bindings.process-in-0.consumer.startOffset=latest
spring.cloud.stream.binders.kafka1.type=kafka
spring.cloud.stream.binders.kafka1.environment.spring.cloud.stream.kafka.binder.brokers=host1:port,host2:port
spring.cloud.stream.binders.kafka1.environment.spring.cloud.stream.kafka.binder.autoCreateTopics=false
spring.cloud.stream.binders.kafka1.environment.spring.cloud.stream.kafka.binder.configuration.security.protocol=SASL_PLAINTEXT
spring.cloud.stream.binders.kafka1.environment.spring.cloud.stream.kafka.binder.jaas.options.useKeyTab=true
spring.cloud.stream.binders.kafka1.environment.spring.cloud.stream.kafka.binder.jaas.options.serviceName=kafka
spring.cloud.stream.binders.kafka1.environment.spring.cloud.stream.kafka.binder.jaas.options.storeKey=true
spring.cloud.stream.binders.kafka1.environment.spring.cloud.stream.kafka.binder.jaas.options.keyTab=/file/input.keytab
spring.cloud.stream.binders.kafka1.environment.spring.cloud.stream.kafka.binder.jaas.options.principal=user@domain.com
spring.cloud.stream.binders.kafka1.environment.spring.kafka.consumer.value-deserializer=com.kafka.message.serializer.EntityDeserialize
#output
spring.cloud.stream.bindings.process-out-0.destination=output-topic
spring.cloud.stream.bindings.process-out-0.binder=kafka2
spring.cloud.stream.bindings.process-out-0.group=groupId2
spring.cloud.stream.binders.kafka2.type=kafka
spring.cloud.stream.binders.kafka2.environment.spring.cloud.stream.kafka.binder.brokers=host1:port,host2:port
spring.cloud.stream.binders.kafka2.environment.spring.cloud.stream.kafka.binder.autoCreateTopics=false
spring.cloud.stream.binders.kafka2.environment.spring.cloud.stream.kafka.binder.configuration.security.protocol=SASL_PLAINTEXT
spring.cloud.stream.binders.kafka2.environment.spring.cloud.stream.kafka.binder.jaas.options.useKeyTab=true
spring.cloud.stream.binders.kafka2.environment.spring.cloud.stream.kafka.binder.jaas.options.serviceName=kafka
spring.cloud.stream.binders.kafka2.environment.spring.cloud.stream.kafka.binder.jaas.options.storeKey=true
spring.cloud.stream.binders.kafka2.environment.spring.cloud.stream.kafka.binder.jaas.options.keyTab=/file/output.keytab
spring.cloud.stream.binders.kafka2.environment.spring.cloud.stream.kafka.binder.jaas.options.principal=user@domain.com

System.setProperty("java.security.krb5.conf", "/file/krb5.conf");
System.setProperty("sun.security.krb5.debug", "true");

public class EntityDeserialize implements Deserializer {
    private ObjectReader objectReader = new ObjectMapper().readerFor(EntityTest.class);

    @Override
    public EntityTest deserialize(String arg0, byte[] arg1) {
        try {
            return objectReader.readValue(arg1);
        } catch (Exception e) {
            throw new RuntimeException("message deserialize error", e);
        }
    }
}


//对应的functional方法
 @Bean
    public Function<Flux<Message<EntityTest>>, Flux<Message<String>>> process(MessageProcessService messageProcessService) {
        return messageFlux ->MessageProcessService.process(messageFlux);

    }