我使用streamletapi为heron实现了这一点。我在这里贴同样的。希望它能帮助其他面临同样问题的人。
Kafka来源

public class KafkaSource implements Source {

    private String streamName;

    private Consumer<String, String> kafkaConsumer;
    private List<String> kafkaTopic;

    private static final Logger LOGGER = Logger.getLogger("KafkaSource");

    @Override
    public void setup(Context context) {

        this.streamName = context.getStreamName();

        kafkaTopic = Arrays.asList(KafkaProperties.KAFKA_TOPIC);

        Properties props = new Properties();
        props.put("bootstrap.servers", KafkaProperties.BOOTSTRAP_SERVERS);
        props.put("group.id", KafkaProperties.CONSUMER_GROUP_ID);
        props.put("enable.auto.commit", KafkaProperties.ENABLE_AUTO_COMMIT);
        props.put("auto.commit.interval.ms", KafkaProperties.AUTO_COMMIT_INTERVAL_MS);
        props.put("session.timeout.ms", KafkaProperties.SESSION_TIMEOUT);
        props.put("key.deserializer", KafkaProperties.KEY_DESERIALIZER);
        props.put("value.deserializer", KafkaProperties.VALUE_DESERIALIZER);
        props.put("auto.offset.reset", KafkaProperties.AUTO_OFFSET_RESET);
        props.put("max.poll.records", KafkaProperties.MAX_POLL_RECORDS);
        props.put("max.poll.interval.ms", KafkaProperties.MAX_POLL_INTERVAL_MS);

        this.kafkaConsumer = new KafkaConsumer<>(props);

        kafkaConsumer.subscribe(kafkaTopic);
    }

    @Override
    public Collection get() {

        List<String> kafkaRecords = new ArrayList<>();

        ConsumerRecords<String, String> records = kafkaConsumer.poll(Long.MAX_VALUE);

        for (ConsumerRecord<String, String> record : records) {
            String rVal = record.value();
            kafkaRecords.add(rVal);
        }

        return kafkaRecords;
    }

    @Override
    public void cleanup() {
        kafkaConsumer.wakeup();
    }
}