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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.simulators.xnf.impl
import arrow.core.Either
import arrow.core.Some
import arrow.core.Try
import arrow.core.extensions.either.monad.monad
import arrow.core.fix
import org.onap.dcae.collectors.veshv.simulators.xnf.impl.adapters.HvVesClient
import org.onap.dcae.collectors.veshv.simulators.xnf.impl.factory.ClientFactory
import org.onap.dcae.collectors.veshv.ves.message.generator.api.MessageParameters
import org.onap.dcae.collectors.veshv.ves.message.generator.api.MessageParametersParser
import org.onap.dcae.collectors.veshv.ves.message.generator.api.ParsingError
import org.onap.dcae.collectors.veshv.ves.message.generator.api.VesEventParameters
import org.onap.dcae.collectors.veshv.ves.message.generator.api.WireFrameParameters
import org.onap.dcae.collectors.veshv.ves.message.generator.factory.MessageGeneratorFactory
import org.onap.dcaegen2.services.sdk.services.hvves.client.producer.api.options.PayloadType
import org.onap.ves.VesEventOuterClass
import reactor.core.Disposable
import reactor.core.publisher.Flux
import reactor.core.publisher.Mono
import reactor.core.publisher.toFlux
import java.io.InputStream
import java.nio.ByteBuffer
import javax.json.Json
import javax.json.JsonArray
/**
* @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
* @since August 2018
*/
internal class XnfSimulator(
private val clientFactory: ClientFactory,
private val generatorFactory: MessageGeneratorFactory,
private val messageParametersParser: MessageParametersParser = MessageParametersParser.INSTANCE) {
private val wireFrameGenerator by lazy { generatorFactory.createWireFrameGenerator() }
private val vesEventGenerator by lazy { generatorFactory.createVesEventGenerator() }
private val defaultHvVesClient by lazy { clientFactory.create() }
fun startSimulation(messageParameters: InputStream): Either<ParsingError, Mono<Void>> =
Either.monad<ParsingError>().binding {
val json = parseJsonArray(messageParameters).bind()
val parameters = messageParametersParser.parse(json).bind()
simulationFrom(parameters)
}.fix()
private fun parseJsonArray(jsonStream: InputStream): Either<ParsingError, JsonArray> =
Try { Json.createReader(jsonStream).readArray() }
.toEither()
.mapLeft { ParsingError("Failed to parse JSON", Some(it)) }
private fun simulationFrom(parameters: List<MessageParameters>): Mono<Void> =
parameters
.map(::asClientToMessages)
.groupMessagesByClients()
.flattenValuesToFlux()
.toList()
.toFlux()
.map(::simulate)
.then()
private fun <M> List<Pair<HvVesClient, M>>.groupMessagesByClients() =
groupBy({ it.first }, { it.second })
private fun <K> Map<K, List<Flux<ByteBuffer>>>.flattenValuesToFlux(): Map<K, Flux<ByteBuffer>> =
mapValues { Flux.concat(it.value) }
private fun asClientToMessages(parameters: MessageParameters) =
when (parameters) {
is VesEventParameters -> {
val messages = vesEventGenerator
.createMessageFlux(parameters)
.map(VesEventOuterClass.VesEvent::toByteBuffer)
Pair(defaultHvVesClient, messages)
}
is WireFrameParameters -> {
val messages = wireFrameGenerator.createMessageFlux(parameters)
val client = clientFactory.create(parameters.wireFrameVersion)
Pair(client, messages)
}
}
private fun simulate(pair: Pair<HvVesClient, Flux<ByteBuffer>>): Disposable =
pair.first
.sendRawPayload(pair.second, PayloadType.PROTOBUF)
.subscribe()
}
internal fun VesEventOuterClass.VesEvent.toByteBuffer() = toByteString().asReadOnlyByteBuffer()
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