2 * ============LICENSE_START=======================================================
3 * dcaegen2-collectors-veshv
4 * ================================================================================
5 * Copyright (C) 2018 NOKIA
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ============LICENSE_END=========================================================
20 package org.onap.dcae.collectors.veshv.impl
22 import arrow.core.Option
23 import io.netty.buffer.ByteBuf
24 import io.netty.buffer.ByteBufAllocator
25 import org.onap.dcae.collectors.veshv.boundary.Collector
26 import org.onap.dcae.collectors.veshv.boundary.Metrics
27 import org.onap.dcae.collectors.veshv.boundary.Sink
28 import org.onap.dcae.collectors.veshv.domain.WireFrameMessage
29 import org.onap.dcae.collectors.veshv.impl.wire.WireChunkDecoder
30 import org.onap.dcae.collectors.veshv.model.RoutedMessage
31 import org.onap.dcae.collectors.veshv.model.VesMessage
32 import org.onap.dcae.collectors.veshv.utils.logging.Logger
33 import org.onap.dcae.collectors.veshv.utils.logging.handleReactiveStreamError
34 import reactor.core.publisher.Flux
35 import reactor.core.publisher.Mono
38 * @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
41 internal class VesHvCollector(
42 private val wireChunkDecoderSupplier: (ByteBufAllocator) -> WireChunkDecoder,
43 private val protobufDecoder: VesDecoder,
44 private val router: Router,
45 private val sink: Sink,
46 private val metrics: Metrics) : Collector {
48 override fun handleConnection(alloc: ByteBufAllocator, dataStream: Flux<ByteBuf>): Mono<Void> =
49 wireChunkDecoderSupplier(alloc).let { wireDecoder ->
51 .transform { decodeWireFrame(it, wireDecoder) }
52 .filter(WireFrameMessage::isValid)
53 .transform(::decodePayload)
54 .filter(VesMessage::isValid)
55 .transform(::routeMessage)
56 .onErrorResume { logger.handleReactiveStreamError(it) }
57 .doFinally { releaseBuffersMemory(wireDecoder) }
61 private fun decodeWireFrame(flux: Flux<ByteBuf>, decoder: WireChunkDecoder): Flux<WireFrameMessage> = flux
62 .doOnNext { metrics.notifyBytesReceived(it.readableBytes()) }
63 .concatMap(decoder::decode)
64 .doOnNext { metrics.notifyMessageReceived(it.payloadSize) }
66 private fun decodePayload(flux: Flux<WireFrameMessage>): Flux<VesMessage> = flux
67 .map(WireFrameMessage::payload)
68 .map(protobufDecoder::decode)
69 .flatMap { omitWhenNone(it) }
71 private fun routeMessage(flux: Flux<VesMessage>): Flux<RoutedMessage> = flux
72 .flatMap(this::findRoute)
74 .doOnNext { metrics.notifyMessageSent(it.topic) }
77 private fun findRoute(msg: VesMessage): Mono<RoutedMessage> = omitWhenNone((router::findDestination)(msg))
79 private fun <V> omitWhenNone(it: Option<V>): Mono<V> = it.fold(
81 logger.info("ommiting the message" + 5)
85 private fun releaseBuffersMemory(wireChunkDecoder: WireChunkDecoder) = wireChunkDecoder.release()
88 private val logger = Logger(VesHvCollector::class)