Kafka Streams, Windowing, Kafka.
org.apache.kafka.common.serialization.Serdes; import org.apache.kafka.streams.KafkaStreams; import org.apache.kafka.streams.KeyValue; import org.apache.kafka.streams.StreamsBuilder; import org.apache.kafka.streams.StreamsConfig; import org.apache.kafka.streams.kstream.*; import java.time.Duration;