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/*
* ============LICENSE_START=======================================================
* dcaegen2-collectors-veshv
* ================================================================================
* Copyright (C) 2018-2019 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.SinkProvider
import org.onap.dcae.collectors.veshv.domain.VesMessage
import org.onap.dcae.collectors.veshv.impl.createKafkaSender
import org.onap.dcae.collectors.veshv.model.ClientContext
import org.onap.dcae.collectors.veshv.model.ServiceContext
import org.onap.dcae.collectors.veshv.utils.logging.Logger
import org.onap.dcaegen2.services.sdk.model.streams.SinkStream
import org.onap.ves.VesEventOuterClass.CommonEventHeader
import reactor.core.publisher.Flux
import reactor.core.publisher.Mono
import reactor.core.scheduler.Schedulers
import reactor.kafka.sender.KafkaSender
import java.util.Collections.synchronizedMap
/**
* @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
* @since June 2018
*/
internal class KafkaSinkProvider : SinkProvider {
private val messageSinks = synchronizedMap(
mutableMapOf<SinkStream, KafkaSender<CommonEventHeader, VesMessage>>()
)
override fun invoke(stream: SinkStream, ctx: ClientContext) = lazy {
messageSinks.computeIfAbsent(stream, ::createKafkaSender).let {
KafkaPublisher(it, ctx)
}
}
override fun close(): Mono<Void> =
Flux.fromIterable(messageSinks.values)
.publishOn(Schedulers.elastic())
.doOnNext(KafkaSender<CommonEventHeader, VesMessage>::close)
.then()
.doOnSuccess {
logger.info(ServiceContext::mdc) { "Message sinks flushed and closed" }
}
companion object {
private val logger = Logger(KafkaSinkProvider::class)
}
}
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