问从控制台生成带有空值(Tombstone)的Kafka消息

EN

override def readMessage() = {
  lineNumber += 1
  print(">")
  (reader.readLine(), parseKey) match {
    case (null, _) => null
    case (line, true) =>
      line.indexOf(keySeparator) match {
        case -1 =>
          if (ignoreError) new ProducerRecord(topic, line.getBytes(StandardCharsets.UTF_8))
          else throw new KafkaException(s"No key found on line $lineNumber: $line")
        case n =>
          val value = (if (n + keySeparator.size > line.size) "" else line.substring(n + keySeparator.size)).getBytes(StandardCharsets.UTF_8)
          new ProducerRecord(topic, line.substring(0, n).getBytes(StandardCharsets.UTF_8), value)
      }
    case (line, false) =>
      new ProducerRecord(topic, line.getBytes(StandardCharsets.UTF_8))
  }
}