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
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
/*
* ============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.adapters
import org.onap.dcae.collectors.veshv.boundary.ConfigurationProvider
import org.onap.dcae.collectors.veshv.healthcheck.api.HealthDescription
import org.onap.dcae.collectors.veshv.healthcheck.api.HealthState
import org.onap.dcae.collectors.veshv.model.CollectorConfiguration
import org.onap.dcae.collectors.veshv.model.ConfigurationProviderParams
import org.onap.dcae.collectors.veshv.model.ServiceContext
import org.onap.dcae.collectors.veshv.utils.logging.Logger
import org.onap.dcae.collectors.veshv.utils.logging.Marker
import reactor.core.publisher.Flux
import reactor.core.publisher.Mono
import reactor.retry.Jitter
import reactor.retry.Retry
import java.io.StringReader
import java.security.MessageDigest
import java.time.Duration
import java.util.*
import java.util.concurrent.atomic.AtomicReference
import javax.json.Json
import javax.json.JsonObject
/**
* @author Jakub Dudycz <jakub.dudycz@nokia.com>
* @since May 2018
*/
internal class ConsulConfigurationProvider(private val http: HttpAdapter,
private val url: String,
private val firstRequestDelay: Duration,
private val requestInterval: Duration,
private val healthState: HealthState,
retrySpec: Retry<Any>
) : ConfigurationProvider {
private val lastConfigurationHash: AtomicReference<ByteArray> = AtomicReference(byteArrayOf())
private val retry = retrySpec
.doOnRetry {
logger.withWarn(ServiceContext::mdc) { log("Could not get fresh configuration", it.exception()) }
healthState.changeState(HealthDescription.RETRYING_FOR_CONSUL_CONFIGURATION)
}
constructor(http: HttpAdapter,
params: ConfigurationProviderParams) : this(
http,
params.configurationUrl,
params.firstRequestDelay,
params.requestInterval,
HealthState.INSTANCE,
Retry.any<Any>()
.retryMax(MAX_RETRIES)
.fixedBackoff(params.requestInterval.dividedBy(BACKOFF_INTERVAL_FACTOR))
.jitter(Jitter.random())
)
override fun invoke(): Flux<CollectorConfiguration> =
Flux.interval(firstRequestDelay, requestInterval)
.concatMap { askForConfig() }
.flatMap(::filterDifferentValues)
.map(::parseJsonResponse)
.map(::createCollectorConfiguration)
.retryWhen(retry)
private fun askForConfig(): Mono<BodyWithInvocationId> = Mono.defer {
val invocationId = UUID.randomUUID()
http.get(url, invocationId).map { BodyWithInvocationId(it, invocationId) }
}
private fun filterDifferentValues(configuration: BodyWithInvocationId) =
configuration.body.let { configurationString ->
configurationString.sha256().let { newHash ->
if (newHash contentEquals lastConfigurationHash.get()) {
logger.trace(ServiceContext::mdc, Marker.Invoke(configuration.invocationId)) {
"No change detected in consul configuration"
}
Mono.empty()
} else {
logger.info(ServiceContext::mdc, Marker.Invoke(configuration.invocationId)) {
"Obtained new configuration from consul:\n${configurationString}"
}
lastConfigurationHash.set(newHash)
Mono.just(configurationString)
}
}
}
private fun parseJsonResponse(responseString: String): JsonObject =
Json.createReader(StringReader(responseString)).readObject()
private fun createCollectorConfiguration(configuration: JsonObject): CollectorConfiguration {
val routing = configuration.getJsonArray("collector.routing")
return CollectorConfiguration(
kafkaBootstrapServers = configuration.getString("dmaap.kafkaBootstrapServers"),
routing = org.onap.dcae.collectors.veshv.model.routing {
for (route in routing) {
val routeObj = route.asJsonObject()
defineRoute {
fromDomain(routeObj.getString("fromDomain"))
toTopic(routeObj.getString("toTopic"))
withFixedPartitioning()
}
}
}.build()
)
}
companion object {
private const val MAX_RETRIES = 5L
private const val BACKOFF_INTERVAL_FACTOR = 30L
private val logger = Logger(ConsulConfigurationProvider::class)
private fun String.sha256() =
MessageDigest
.getInstance("SHA-256")
.digest(toByteArray())
}
private data class BodyWithInvocationId(val body: String, val invocationId: UUID)
}
|