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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.tests.component
import arrow.syntax.function.partially1
import io.netty.buffer.ByteBuf
import io.netty.buffer.ByteBufAllocator
import io.netty.buffer.CompositeByteBuf
import io.netty.buffer.Unpooled
import io.netty.buffer.UnpooledByteBufAllocator
import org.assertj.core.api.Assertions.assertThat
import org.jetbrains.spek.api.Spek
import org.jetbrains.spek.api.dsl.describe
import org.jetbrains.spek.api.dsl.it
import org.onap.dcae.collectors.veshv.domain.VesEventDomain.PERF3GPP
import org.onap.dcae.collectors.veshv.domain.WireFrameEncoder
import org.onap.dcae.collectors.veshv.domain.WireFrameMessage
import org.onap.dcae.collectors.veshv.tests.component.Sut.Companion.MAX_PAYLOAD_SIZE_BYTES
import org.onap.dcae.collectors.veshv.tests.fakes.CountingSink
import org.onap.dcae.collectors.veshv.tests.fakes.basicRouting
import org.onap.dcae.collectors.veshv.tests.utils.commonHeader
import org.onap.dcae.collectors.veshv.ves.message.generator.api.VesEventParameters
import org.onap.dcae.collectors.veshv.ves.message.generator.api.VesEventType
import org.onap.dcae.collectors.veshv.ves.message.generator.factory.MessageGeneratorFactory
import reactor.core.publisher.Flux
import reactor.math.sum
import java.security.MessageDigest
import java.time.Duration
import java.util.*
import kotlin.system.measureTimeMillis
/**
* @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
* @since May 2018
*/
object PerformanceSpecification : Spek({
debugRx(false)
describe("VES High Volume Collector performance") {
it("should handle multiple clients in reasonable time") {
val sink = CountingSink()
val sut = Sut(sink)
sut.configurationProvider.updateConfiguration(basicRouting)
val numMessages: Long = 300_000
val runs = 4
val timeout = Duration.ofMinutes((1 + (runs / 2)).toLong())
val params = VesEventParameters(
commonEventHeader = commonHeader(PERF3GPP),
messageType = VesEventType.VALID,
amount = numMessages
)
val fluxes = (1.rangeTo(runs)).map {
sut.collector.handleConnection(generateDataStream(sut.alloc, params))
}
val durationMs = measureTimeMillis {
Flux.merge(fluxes).then().block(timeout)
}
val durationSec = durationMs / 1000.0
val throughput = sink.count / durationSec
logger.info { "Processed $runs connections each containing $numMessages msgs." }
logger.info { "Forwarded ${sink.count / ONE_MILLION}M msgs in $durationSec seconds, that is $throughput msgs/PERF3GPP_REGIONAL" }
assertThat(sink.count)
.describedAs("should send all events")
.isEqualTo(runs * numMessages)
}
it("should disconnect on transmission errors") {
val sink = CountingSink()
val sut = Sut(sink)
sut.configurationProvider.updateConfiguration(basicRouting)
val numMessages: Long = 100_000
val timeout = Duration.ofSeconds(30)
val params = VesEventParameters(
commonEventHeader = commonHeader(PERF3GPP),
messageType = VesEventType.VALID,
amount = numMessages
)
val dataStream = generateDataStream(sut.alloc, params)
.transform(::dropWhenIndex.partially1 { it % 101 == 0L })
sut.collector.handleConnection(dataStream)
.timeout(timeout)
.block()
logger.info { "Forwarded ${sink.count} msgs" }
assertThat(sink.count)
.describedAs("should send up to number of events")
.isLessThan(numMessages)
}
}
describe("test infrastructure") {
val digest = MessageDigest.getInstance("MD5")
fun collectDigest(bb: ByteBuf) {
bb.markReaderIndex()
while (bb.isReadable) {
digest.update(bb.readByte())
}
bb.resetReaderIndex()
}
fun calculateDigest(arrays: List<ByteArray>): ByteArray {
for (array in arrays) {
digest.update(array)
}
return digest.digest()
}
it("should yield same bytes as in the input") {
val numberOfBuffers = 10
val singleBufferSize = 1000
val arrays = (1.rangeTo(numberOfBuffers)).map { randomByteArray(singleBufferSize) }
val inputDigest = calculateDigest(arrays)
val actualTotalSize = Flux.fromIterable(arrays)
.map { Unpooled.wrappedBuffer(it) }
.transform { simulateRemoteTcp(UnpooledByteBufAllocator.DEFAULT, 4, it) }
.doOnNext(::collectDigest)
.map {
val size = it.readableBytes()
it.release()
size
}
.sum()
.map(Long::toInt)
.block()
val outputDigest = digest.digest()
assertThat(actualTotalSize!!).isEqualTo(numberOfBuffers * singleBufferSize)
assertThat(outputDigest).isEqualTo(inputDigest)
}
}
})
private const val ONE_MILLION = 1_000_000.0
private val rand = Random()
private val generatorsFactory = MessageGeneratorFactory(MAX_PAYLOAD_SIZE_BYTES)
private fun randomByteArray(size: Int): ByteArray {
val bytes = ByteArray(size)
rand.nextBytes(bytes)
return bytes
}
fun dropWhenIndex(predicate: (Long) -> Boolean, stream: Flux<ByteBuf>): Flux<ByteBuf> =
stream.index()
.filter { predicate(it.t1) }
.map { it.t2 }
private fun generateDataStream(alloc: ByteBufAllocator, params: VesEventParameters): Flux<ByteBuf> =
WireFrameEncoder(alloc).let { encoder ->
generatorsFactory.createVesEventGenerator()
.createMessageFlux(params)
.map { WireFrameMessage(it.toByteArray()) }
.map(encoder::encode)
.transform { simulateRemoteTcp(alloc, 1000, it) }
}
private fun simulateRemoteTcp(alloc: ByteBufAllocator, maxSize: Int, byteBuffers: Flux<ByteBuf>) =
byteBuffers
.bufferTimeout(maxSize, Duration.ofMillis(250))
.map { joinBuffers(alloc, it) }
.concatMap { randomlySplitTcpFrames(it) }
private fun joinBuffers(alloc: ByteBufAllocator, it: List<ByteBuf>?) =
alloc.compositeBuffer().addComponents(true, it)
private fun randomlySplitTcpFrames(bb: CompositeByteBuf): Flux<ByteBuf> {
val targetFrameSize = Math.max(4, (bb.readableBytes() * Math.random()).toInt())
return Flux.create<ByteBuf> { sink ->
while (bb.isReadable) {
val frameSize = Math.min(targetFrameSize, bb.readableBytes())
sink.next(bb.retainedSlice(bb.readerIndex(), frameSize))
bb.readerIndex(bb.readerIndex() + frameSize)
}
bb.release()
sink.complete()
}
}
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