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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 arrow.effects.IO
import org.apache.kafka.clients.producer.ProducerConfig.ACKS_CONFIG
import org.apache.kafka.clients.producer.ProducerConfig.BOOTSTRAP_SERVERS_CONFIG
import org.apache.kafka.clients.producer.ProducerConfig.BUFFER_MEMORY_CONFIG
import org.apache.kafka.clients.producer.ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG
import org.apache.kafka.clients.producer.ProducerConfig.MAX_IN_FLIGHT_REQUESTS_PER_CONNECTION
import org.apache.kafka.clients.producer.ProducerConfig.MAX_REQUEST_SIZE_CONFIG
import org.apache.kafka.clients.producer.ProducerConfig.RETRIES_CONFIG
import org.apache.kafka.clients.producer.ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG
import org.onap.dcae.collectors.veshv.boundary.SinkProvider
import org.onap.dcae.collectors.veshv.config.api.model.KafkaConfiguration
import org.onap.dcae.collectors.veshv.model.ClientContext
import org.onap.dcae.collectors.veshv.model.ServiceContext
import org.onap.dcae.collectors.veshv.domain.VesMessage
import org.onap.dcae.collectors.veshv.utils.logging.Logger
import org.onap.ves.VesEventOuterClass.CommonEventHeader
import reactor.kafka.sender.KafkaSender
import reactor.kafka.sender.SenderOptions
import java.lang.Integer.max
/**
* @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
* @since June 2018
*/
internal class KafkaSinkProvider internal constructor(
private val kafkaSender: KafkaSender<CommonEventHeader, VesMessage>) : SinkProvider {
constructor(config: KafkaConfiguration) : this(constructKafkaSender(config))
override fun invoke(ctx: ClientContext) = KafkaSink(kafkaSender, ctx)
override fun close() = IO {
kafkaSender.close()
logger.info(ServiceContext::mdc) { "KafkaSender flushed and closed" }
}
companion object {
private val logger = Logger(KafkaSinkProvider::class)
private const val MAXIMUM_REQUEST_SIZE_MULTIPLIER = 1.2f
private const val BUFFER_MEMORY_MULTIPLIER = 32
private const val MINIMUM_BUFFER_MEMORY = 32 * 1024 * 1024
private fun constructKafkaSender(config: KafkaConfiguration) =
KafkaSender.create(constructSenderOptions(config))
private fun constructSenderOptions(config: KafkaConfiguration) =
SenderOptions.create<CommonEventHeader, VesMessage>()
.producerProperty(BOOTSTRAP_SERVERS_CONFIG, config.bootstrapServers)
.producerProperty(MAX_REQUEST_SIZE_CONFIG, maxRequestSize(config))
.producerProperty(BUFFER_MEMORY_CONFIG, bufferMemory(config))
.producerProperty(KEY_SERIALIZER_CLASS_CONFIG, ProtobufSerializer::class.java)
.producerProperty(VALUE_SERIALIZER_CLASS_CONFIG, VesMessageSerializer::class.java)
.producerProperty(MAX_IN_FLIGHT_REQUESTS_PER_CONNECTION, 1)
.producerProperty(RETRIES_CONFIG, 1)
.producerProperty(ACKS_CONFIG, "1")
.stopOnError(false)
private fun maxRequestSize(config: KafkaConfiguration) =
(MAXIMUM_REQUEST_SIZE_MULTIPLIER * config.maximalRequestSizeBytes).toInt()
private fun bufferMemory(config: KafkaConfiguration) =
max(MINIMUM_BUFFER_MEMORY, BUFFER_MEMORY_MULTIPLIER * config.maximalRequestSizeBytes)
}
}
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