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/*
* ============LICENSE_START=======================================================
* dcaegen2-collectors-veshv
* ================================================================================
* Copyright (C) 2018 NOKIA
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END=========================================================
*/
package org.onap.dcae.collectors.veshv.impl.adapters.kafka
import org.onap.dcae.collectors.veshv.boundary.Sink
import org.onap.dcae.collectors.veshv.model.RoutedMessage
import org.onap.dcae.collectors.veshv.model.VesMessage
import org.onap.dcae.collectors.veshv.utils.logging.Logger
import org.onap.ves.VesEventOuterClass.CommonEventHeader
import reactor.core.publisher.Flux
import reactor.kafka.sender.KafkaSender
import reactor.kafka.sender.SenderRecord
import reactor.kafka.sender.SenderResult
import java.util.concurrent.atomic.AtomicLong
/**
* @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
* @since May 2018
*/
internal class KafkaSink(private val sender: KafkaSender<CommonEventHeader, VesMessage>) : Sink {
private val sentMessages = AtomicLong(0)
override fun send(messages: Flux<RoutedMessage>): Flux<RoutedMessage> {
val records = messages.map(this::vesToKafkaRecord)
val result = sender.send(records)
.doOnNext(::logException)
.filter(::isSuccessful)
.map { it.correlationMetadata() }
return if (logger.traceEnabled) {
result.doOnNext(::logSentMessage)
} else {
result
}
}
private fun vesToKafkaRecord(msg: RoutedMessage): SenderRecord<CommonEventHeader, VesMessage, RoutedMessage> {
return SenderRecord.create(
msg.topic,
msg.partition,
System.currentTimeMillis(),
msg.message.header,
msg.message,
msg)
}
private fun logException(senderResult: SenderResult<out Any>) {
if (senderResult.exception() != null) {
logger.warn(senderResult.exception()) { "Failed to send message to Kafka" }
}
}
private fun logSentMessage(sentMsg: RoutedMessage) {
logger.trace {
val msgNum = sentMessages.incrementAndGet()
"Message #$msgNum has been sent to ${sentMsg.topic}:${sentMsg.partition}"
}
}
private fun isSuccessful(senderResult: SenderResult<out Any>) = senderResult.exception() == null
companion object {
val logger = Logger(KafkaSink::class)
}
}
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