About KafkaConsumer and WM'ing and EventTime charactersitics

[Vishal Santoshi]

 In case where one needs t to use kafka event time ( ingestion time )  for
watermark generation and timestamp extraction is setting
EventTimeCharactersitic  as EventTime enough ?

Or is this  explicit code required ?

consumer.assignTimestampsAndWatermarks(new
AssignerWithPunctuatedWatermarks<KafkaRecord>() {
    @Nullable
    @Override
    public Watermark checkAndGetNextWatermark(KafkaRecord lastElement,
long extractedTimestamp) {
        return new Watermark(extractedTimestamp);
    }

    @Override
    public long extractTimestamp(KafkaRecord element, long
previousElementTimestamp) {
        return previousElementTimestamp;
    }
});