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Kafka + Kotlin + Coroutines
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package com.lapanthere.bohemia | |
import kotlinx.coroutines.flow.Flow | |
import kotlinx.coroutines.flow.flow | |
import org.apache.kafka.clients.consumer.ConsumerRecord | |
import org.apache.kafka.clients.consumer.KafkaConsumer | |
import java.time.Duration | |
fun <K, V> KafkaConsumer<K, V>.asFlow(timeout: Duration = Duration.ofMillis(500)): Flow<ConsumerRecord<K, V>> = | |
flow { | |
poll(timeout).forEach { emit(it) } | |
} |
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package com.lapanthere.bohemia | |
import kotlinx.coroutines.CompletableDeferred | |
import kotlinx.coroutines.Deferred | |
import org.apache.kafka.clients.producer.KafkaProducer | |
import org.apache.kafka.clients.producer.ProducerRecord | |
import org.apache.kafka.clients.producer.RecordMetadata | |
fun <K, V> KafkaProducer<K, V>.sendAsync(record: ProducerRecord<K, V>): Deferred<RecordMetadata> = | |
CompletableDeferred<RecordMetadata>().apply { | |
send(record) { metadata, exception -> | |
if (exception != null) { | |
completeExceptionally(exception) | |
} else { | |
complete(metadata) | |
} | |
} | |
} |
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