Question

我正在尝试将jsonSerde作为主题的输入，应该处理记录并需要使用kafka流将其作为Avro消息放入不同主题中。输出看起来是二进制的，并且数据不是实际的JSON格式。，就像它使用默认的bytearrayserde作为值和键。我不知道为什么，但是我将序列化器提供为SpecificAvroSerde。

        private final static JsonSerde<JsonNode> jsonSerde = new JsonSerde<JsonNode>(JsonNode.class);

        private static Map<String, Object> props;
        //Serde of specific record
        private static  SpecificAvroSerde<SpecificRecord> productValueSerde;



   @Bean(name = KafkaStreamsDefaultConfiguration.DEFAULT_STREAMS_CONFIG_BEAN_NAME)
        public StreamsConfig kafkaStreamsConfig()
                throws UnknownHostException {
            props = new HashMap<>();
            props.put(StreamsConfig.APPLICATION_ID_CONFIG,
                    "*****processor-3");
            props.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:29092,localhost:19092,localhost:39092");
            props.put(StreamsConfig.DEFAULT_KEY_SERDE_CLASS_CONFIG, SpecificAvroSerde.class);
            props.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG, SpecificAvroSerde.class);
            props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
            props.put(AbstractKafkaAvroSerDeConfig.SCHEMA_REGISTRY_URL_CONFIG,
                    "http://localhost:18081");
            props.put(ConsumerConfig.PARTITION_ASSIGNMENT_STRATEGY_CONFIG, "org.apache.kafka.clients"
                    + ".consumer.RoundRobinAssignor");
            productValueSerde = new SpecificAvroSerde<SpecificRecord>();
            productValueSerde.configure((Collections.singletonMap(
                    AbstractKafkaAvroSerDeConfig.SCHEMA_REGISTRY_URL_CONFIG,
                    "http://localhost:18081")),false);
            return new StreamsConfig(props);
        }


        @Bean
        public KStream<JsonNode,JsonNode> KStream(StreamsBuilder kStreamBuilder){

            KStream<JsonNode,JsonNode> stream = kStreamBuilder.stream("localtest",Consumed.with(jsonSerde, jsonSerde));
            try {
                KStream<JsonNode,SpecificRecord> avroStream = stream.flatMap((K,V)->actNationalPaperHelper.mapToCoreAvro(K, V));
                //avroStream.flatMap((K,V)->System.out.println(V); return avroStream));
                avroStream.through("serdetest16",Produced.with(jsonSerde, productValueSerde));
            }
            catch(Exception e) {
                System.out.println(e);
            }

            return stream;

        }
   T

我正在尝试使用kafka流发送avro消息，但它作为二进制数据类型-java

0 个答案: