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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.fix
import arrow.effects.IO
import arrow.instances.either.monad.monad
import arrow.typeclasses.binding
import org.onap.dcae.collectors.veshv.simulators.xnf.impl.factory.ClientFactory
import org.onap.dcae.collectors.veshv.utils.arrow.asIo
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 reactor.core.publisher.Mono
import reactor.core.publisher.toFlux
import java.io.InputStream
import javax.json.Json
import javax.json.JsonArray
/**
* @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
* @since August 2018
*/
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() }
fun startSimulation(messageParameters: InputStream): Either<ParsingError, IO<Unit>> =
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>): IO<Unit> = parameters
.toFlux()
.flatMap(::simulate)
.then(Mono.just(Unit))
.asIo()
private fun simulate(parameters: MessageParameters): Mono<Unit> =
when (parameters) {
is VesEventParameters -> {
val messages = vesEventGenerator.createMessageFlux(parameters)
val client = clientFactory.create()
client.sendVesEvents(messages)
}
is WireFrameParameters -> {
val messages = wireFrameGenerator.createMessageFlux(parameters)
val client = clientFactory.create(parameters.wireFrameVersion)
client.sendRawPayload(messages)
}
}
}
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