1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
/*
* ============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.impl
import arrow.core.Either
import io.netty.buffer.ByteBuf
import org.onap.dcae.collectors.veshv.boundary.Collector
import org.onap.dcae.collectors.veshv.boundary.Metrics
import org.onap.dcae.collectors.veshv.boundary.Sink
import org.onap.dcae.collectors.veshv.domain.ByteData
import org.onap.dcae.collectors.veshv.domain.WireFrameMessage
import org.onap.dcae.collectors.veshv.impl.adapters.ClientContextLogging.handleReactiveStreamError
import org.onap.dcae.collectors.veshv.impl.wire.WireChunkDecoder
import org.onap.dcae.collectors.veshv.model.ClientContext
import org.onap.dcae.collectors.veshv.model.RoutedMessage
import org.onap.dcae.collectors.veshv.model.VesMessage
import org.onap.dcae.collectors.veshv.utils.logging.Logger
import org.onap.dcae.collectors.veshv.utils.logging.filterEmptyWithLog
import org.onap.dcae.collectors.veshv.utils.logging.filterFailedWithLog
import reactor.core.publisher.Flux
import reactor.core.publisher.Mono
/**
* @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
* @since May 2018
*/
internal class VesHvCollector(
private val clientContext: ClientContext,
private val wireChunkDecoder: WireChunkDecoder,
private val protobufDecoder: VesDecoder,
private val router: Router,
private val sink: Sink,
private val metrics: Metrics) : Collector {
override fun handleConnection(dataStream: Flux<ByteBuf>): Mono<Void> =
dataStream
.transform { decodeWireFrame(it) }
.transform(::filterInvalidWireFrame)
.transform(::decodeProtobufPayload)
.transform(::filterInvalidProtobufMessages)
.transform(::routeMessage)
.onErrorResume { logger.handleReactiveStreamError(clientContext, it) }
.doFinally { releaseBuffersMemory() }
.then()
private fun decodeWireFrame(flux: Flux<ByteBuf>): Flux<WireFrameMessage> = flux
.doOnNext { metrics.notifyBytesReceived(it.readableBytes()) }
.concatMap(wireChunkDecoder::decode)
.doOnNext { metrics.notifyMessageReceived(it.payloadSize) }
private fun filterInvalidWireFrame(flux: Flux<WireFrameMessage>): Flux<WireFrameMessage> = flux
.filterFailedWithLog(MessageValidator::validateFrameMessage)
private fun decodeProtobufPayload(flux: Flux<WireFrameMessage>): Flux<VesMessage> = flux
.map(WireFrameMessage::payload)
.flatMap(::decodePayload)
private fun decodePayload(rawPayload: ByteData): Flux<VesMessage> = protobufDecoder
.decode(rawPayload)
.filterFailedWithLog(logger, clientContext::asMap,
{ "Ves event header decoded successfully" },
{ "Failed to decode ves event header, reason: ${it.message}" })
private fun filterInvalidProtobufMessages(flux: Flux<VesMessage>): Flux<VesMessage> = flux
.filterFailedWithLog(MessageValidator::validateProtobufMessage)
private fun routeMessage(flux: Flux<VesMessage>): Flux<RoutedMessage> = flux
.flatMap(this::findRoute)
.compose(sink::send)
.doOnNext { metrics.notifyMessageSent(it.topic) }
private fun findRoute(msg: VesMessage) = router
.findDestination(msg)
.filterEmptyWithLog(logger, clientContext::asMap,
{ "Found route for message: ${it.topic}, partition: ${it.partition}" },
{ "Could not find route for message" })
private fun releaseBuffersMemory() = wireChunkDecoder.release()
.also { logger.debug { "Released buffer memory after handling message stream" } }
fun <T> Flux<T>.filterFailedWithLog(predicate: (T) -> Either<() -> String, () -> String>) =
filterFailedWithLog(logger, clientContext::asMap, predicate)
companion object {
private val logger = Logger(VesHvCollector::class)
}
}
|
