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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.ves.message.generator.impl
import com.google.protobuf.ByteString
import org.onap.dcae.collectors.veshv.domain.ByteData
import org.onap.dcae.collectors.veshv.domain.PayloadContentType
import org.onap.dcae.collectors.veshv.domain.WireFrameMessage
import org.onap.dcae.collectors.veshv.ves.message.generator.api.MessageGenerator
import org.onap.dcae.collectors.veshv.ves.message.generator.api.MessageParameters
import org.onap.dcae.collectors.veshv.ves.message.generator.api.MessageType
import org.onap.dcae.collectors.veshv.ves.message.generator.api.MessageType.FIXED_PAYLOAD
import org.onap.dcae.collectors.veshv.ves.message.generator.api.MessageType.INVALID_GPB_DATA
import org.onap.dcae.collectors.veshv.ves.message.generator.api.MessageType.INVALID_WIRE_FRAME
import org.onap.dcae.collectors.veshv.ves.message.generator.api.MessageType.TOO_BIG_PAYLOAD
import org.onap.dcae.collectors.veshv.ves.message.generator.api.MessageType.VALID
import org.onap.ves.VesEventOuterClass.CommonEventHeader
import org.onap.ves.VesEventOuterClass.VesEvent
import reactor.core.publisher.Flux
import reactor.core.publisher.Mono
import java.nio.charset.Charset
/**
* @author Jakub Dudycz <jakub.dudycz@nokia.com>
* @since June 2018
*/
class MessageGeneratorImpl internal constructor(
private val payloadGenerator: PayloadGenerator,
private val maxPayloadSizeBytes: Int
) : MessageGenerator {
override fun createMessageFlux(messageParameters: List<MessageParameters>): Flux<WireFrameMessage> = Flux
.fromIterable(messageParameters)
.flatMap { createMessageFlux(it) }
private fun createMessageFlux(parameters: MessageParameters): Flux<WireFrameMessage> =
Mono.fromCallable { createMessage(parameters.commonEventHeader, parameters.messageType) }
.let {
when {
parameters.amount < 0 ->
// repeat forever
it.repeat()
parameters.amount == 0L ->
// do not generate any message
Flux.empty()
else ->
// send original message and additional amount-1 messages
it.repeat(parameters.amount - 1)
}
}
private fun createMessage(commonEventHeader: CommonEventHeader, messageType: MessageType): WireFrameMessage =
when (messageType) {
VALID ->
WireFrameMessage(vesEvent(commonEventHeader, payloadGenerator.generatePayload()))
TOO_BIG_PAYLOAD ->
WireFrameMessage(vesEvent(commonEventHeader, oversizedPayload()))
FIXED_PAYLOAD ->
WireFrameMessage(vesEvent(commonEventHeader, fixedPayload()))
INVALID_WIRE_FRAME -> {
val payload = ByteData(vesEvent(commonEventHeader, payloadGenerator.generatePayload()))
WireFrameMessage(
payload,
UNSUPPORTED_VERSION,
UNSUPPORTED_VERSION,
PayloadContentType.GOOGLE_PROTOCOL_BUFFER.hexValue,
payload.size())
}
INVALID_GPB_DATA ->
WireFrameMessage("invalid vesEvent".toByteArray(Charset.defaultCharset()))
}
private fun vesEvent(commonEventHeader: CommonEventHeader, eventFields: ByteString): ByteArray {
return createVesEvent(commonEventHeader, eventFields).toByteArray()
}
private fun createVesEvent(commonEventHeader: CommonEventHeader, payload: ByteString): VesEvent =
VesEvent.newBuilder()
.setCommonEventHeader(commonEventHeader)
.setEventFields(payload)
.build()
private fun oversizedPayload() =
payloadGenerator.generateRawPayload(maxPayloadSizeBytes + 1)
private fun fixedPayload() =
payloadGenerator.generateRawPayload(MessageGenerator.FIXED_PAYLOAD_SIZE)
companion object {
private const val UNSUPPORTED_VERSION: Short = 2
}
}
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