ox.kafka.KafkaConsumerWrapper.scala Maven / Gradle / Ivy
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package ox.kafka
import org.apache.kafka.clients.consumer.{ConsumerRecords, KafkaConsumer, OffsetAndMetadata}
import org.apache.kafka.common.TopicPartition
import org.slf4j.LoggerFactory
import ox.*
import ox.channels.*
import scala.jdk.CollectionConverters.*
trait KafkaConsumerWrapper[K, V]:
def subscribe(topics: Seq[String]): Unit
def poll(): ConsumerRecords[K, V]
def commit(offsets: Map[TopicPartition, Long]): Unit
object KafkaConsumerWrapper:
private val logger = LoggerFactory.getLogger(classOf[KafkaConsumerWrapper.type])
def apply[K, V](consumer: KafkaConsumer[K, V], closeWhenComplete: Boolean)(using Ox): ActorRef[KafkaConsumerWrapper[K, V]] =
val logic = new KafkaConsumerWrapper[K, V]:
override def subscribe(topics: Seq[String]): Unit =
try consumer.subscribe(topics.asJava)
catch
case t: Throwable =>
logger.error(s"Exception when subscribing to $topics", t)
throw t
override def poll(): ConsumerRecords[K, V] =
try consumer.poll(java.time.Duration.ofMillis(100))
catch
case t: Throwable =>
logger.error("Exception when polling for records in Kafka", t)
throw t
override def commit(offsets: Map[TopicPartition, Long]): Unit =
try consumer.commitSync(offsets.view.mapValues(o => new OffsetAndMetadata(o + 1)).toMap.asJava)
catch
case t: Throwable =>
logger.error("Exception when committing offsets", t)
throw t
def close(wrapper: KafkaConsumerWrapper[K, V]): Unit = if closeWhenComplete then
logger.debug("Closing the Kafka consumer")
uninterruptible(consumer.close())
Actor.create(logic, Some(close))
end apply
end KafkaConsumerWrapper