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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.simulators.dcaeapp.impl
import arrow.effects.IO
import arrow.effects.fix
import arrow.effects.instances.io.monadError.monadError
import arrow.typeclasses.bindingCatch
import org.onap.dcae.collectors.veshv.utils.arrow.asIo
import org.onap.dcae.collectors.veshv.utils.logging.Logger
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.VesEventParameters
import org.onap.dcae.collectors.veshv.ves.message.generator.api.VesEventType.FIXED_PAYLOAD
import org.onap.dcae.collectors.veshv.ves.message.generator.impl.vesevent.VesEventGenerator
import org.onap.ves.VesEventOuterClass.VesEvent
import reactor.core.publisher.Flux
import java.io.InputStream
import javax.json.Json
class MessageStreamValidation(
private val messageGenerator: VesEventGenerator,
private val messageParametersParser: MessageParametersParser = MessageParametersParser.INSTANCE) {
fun validate(jsonDescription: InputStream, consumedMessages: List<ByteArray>): IO<Boolean> =
IO.monadError().bindingCatch {
val messageParams = parseMessageParams(jsonDescription)
logger.debug { "Parsed message parameters: $messageParams" }
val expectedEvents = generateEvents(messageParams).bind()
val actualEvents = decodeConsumedEvents(consumedMessages)
if (shouldValidatePayloads(messageParams))
expectedEvents == actualEvents
else
validateHeaders(actualEvents, expectedEvents)
}.fix()
private fun parseMessageParams(input: InputStream): List<VesEventParameters> {
val paramsArray = Json.createReader(input).readArray()
val messageParams = messageParametersParser.parse(paramsArray)
return messageParams.fold(
{
logger.warn { "Error while parsing message parameters: ${it::class.qualifiedName} : ${it.message}" }
logger.debug { "Detailed stack trace: $it" }
throw IllegalArgumentException("Parsing error: " + it.message)
},
{
toVesEventParams(it)
}
)
}
private fun toVesEventParams(params: List<MessageParameters>): List<VesEventParameters> =
if (params.isEmpty()) {
val message = "Message param list cannot be empty"
logger.warn { message }
throw IllegalArgumentException(message)
} else params.map(::validateMessageParams)
private fun validateMessageParams(params: MessageParameters): VesEventParameters =
if (params !is VesEventParameters) {
val message = "Only VesEvent-related message types can be validated. " +
"Correct values are: VALID, TOO_BIG_PAYLOAD, FIXED_PAYLOAD"
logger.warn { message }
throw IllegalArgumentException(message)
} else params
private fun shouldValidatePayloads(parameters: List<VesEventParameters>) =
parameters.all { it.messageType == FIXED_PAYLOAD }
private fun validateHeaders(actual: List<VesEvent>,
expected: List<VesEvent>): Boolean {
val consumedHeaders = actual.map { it.commonEventHeader }
val generatedHeaders = expected.map { it.commonEventHeader }
return generatedHeaders == consumedHeaders
}
private fun generateEvents(parameters: List<VesEventParameters>): IO<List<VesEvent>> = Flux
.fromIterable(parameters)
.flatMap { messageGenerator.createMessageFlux(it) }
.collectList()
.asIo()
private fun decodeConsumedEvents(consumedMessages: List<ByteArray>) =
consumedMessages.map(VesEvent::parseFrom)
companion object {
private val logger = Logger(MessageStreamValidation::class)
}
}
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