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.Either
23 import io.netty.buffer.ByteBuf
24 import org.onap.dcae.collectors.veshv.boundary.Collector
25 import org.onap.dcae.collectors.veshv.boundary.Metrics
26 import org.onap.dcae.collectors.veshv.boundary.Sink
27 import org.onap.dcae.collectors.veshv.domain.ByteData
28 import org.onap.dcae.collectors.veshv.domain.WireFrameMessage
29 import org.onap.dcae.collectors.veshv.impl.adapters.ClientContextLogging.handleReactiveStreamError
30 import org.onap.dcae.collectors.veshv.impl.wire.WireChunkDecoder
31 import org.onap.dcae.collectors.veshv.model.ClientContext
32 import org.onap.dcae.collectors.veshv.model.RoutedMessage
33 import org.onap.dcae.collectors.veshv.model.VesMessage
34 import org.onap.dcae.collectors.veshv.utils.logging.Logger
35 import org.onap.dcae.collectors.veshv.utils.logging.filterEmptyWithLog
36 import org.onap.dcae.collectors.veshv.utils.logging.filterFailedWithLog
37 import reactor.core.publisher.Flux
38 import reactor.core.publisher.Mono
41 * @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
44 internal class VesHvCollector(
45 private val clientContext: ClientContext,
46 private val wireChunkDecoder: WireChunkDecoder,
47 private val protobufDecoder: VesDecoder,
48 private val router: Router,
49 private val sink: Sink,
50 private val metrics: Metrics) : Collector {
52 override fun handleConnection(dataStream: Flux<ByteBuf>): Mono<Void> =
54 .transform { decodeWireFrame(it) }
55 .transform(::filterInvalidWireFrame)
56 .transform(::decodeProtobufPayload)
57 .transform(::filterInvalidProtobufMessages)
58 .transform(::routeMessage)
59 .onErrorResume { logger.handleReactiveStreamError(clientContext, it) }
60 .doFinally { releaseBuffersMemory() }
63 private fun decodeWireFrame(flux: Flux<ByteBuf>): Flux<WireFrameMessage> = flux
64 .doOnNext { metrics.notifyBytesReceived(it.readableBytes()) }
65 .concatMap(wireChunkDecoder::decode)
66 .doOnNext { metrics.notifyMessageReceived(it.payloadSize) }
68 private fun filterInvalidWireFrame(flux: Flux<WireFrameMessage>): Flux<WireFrameMessage> = flux
69 .filterFailedWithLog(MessageValidator::validateFrameMessage)
71 private fun decodeProtobufPayload(flux: Flux<WireFrameMessage>): Flux<VesMessage> = flux
72 .map(WireFrameMessage::payload)
73 .flatMap(::decodePayload)
75 private fun decodePayload(rawPayload: ByteData): Flux<VesMessage> = protobufDecoder
77 .filterFailedWithLog(logger, clientContext::fullMdc,
78 { "Ves event header decoded successfully" },
79 { "Failed to decode ves event header, reason: ${it.message}" })
81 private fun filterInvalidProtobufMessages(flux: Flux<VesMessage>): Flux<VesMessage> = flux
82 .filterFailedWithLog(MessageValidator::validateProtobufMessage)
84 private fun routeMessage(flux: Flux<VesMessage>): Flux<RoutedMessage> = flux
85 .flatMap(this::findRoute)
87 .doOnNext { metrics.notifyMessageSent(it.topic) }
89 private fun findRoute(msg: VesMessage) = router
91 .filterEmptyWithLog(logger, clientContext::fullMdc,
92 { "Found route for message: ${it.topic}, partition: ${it.partition}" },
93 { "Could not find route for message" })
95 private fun releaseBuffersMemory() = wireChunkDecoder.release()
96 .also { logger.debug { "Released buffer memory after handling message stream" } }
98 fun <T> Flux<T>.filterFailedWithLog(predicate: (T) -> Either<() -> String, () -> String>) =
99 filterFailedWithLog(logger, clientContext::fullMdc, predicate)
102 private val logger = Logger(VesHvCollector::class)