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.adapters
22 import org.onap.dcae.collectors.veshv.boundary.ConfigurationProvider
23 import org.onap.dcae.collectors.veshv.model.CollectorConfiguration
24 import org.onap.dcae.collectors.veshv.model.routing
25 import org.onap.ves.VesEventV5.VesEvent.CommonEventHeader.Domain.HVRANMEAS
26 import org.onap.ves.VesEventV5.VesEvent.CommonEventHeader.Domain.forNumber
27 import org.slf4j.LoggerFactory
28 import reactor.core.publisher.Flux
29 import reactor.core.publisher.Mono
30 import java.io.StringReader
31 import java.time.Duration
33 import java.util.concurrent.atomic.AtomicReference
34 import javax.json.Json
35 import javax.json.JsonObject
39 * @author Jakub Dudycz <jakub.dudycz@nokia.com>
42 internal class ConsulConfigurationProvider(private val url: String,
43 private val http: HttpAdapter,
44 private val firstRequestDelay: Duration,
45 private val requestInterval: Duration
46 ) : ConfigurationProvider {
48 private val lastConfigurationHash: AtomicReference<Int> = AtomicReference(0)
50 override fun invoke(): Flux<CollectorConfiguration> =
51 Flux.concat(createDefaultConfigurationFlux(), createConsulFlux())
53 private fun createDefaultConfigurationFlux(): Mono<CollectorConfiguration> = Mono.just(
54 CollectorConfiguration(
55 kafkaBootstrapServers = "kafka:9092",
59 toTopic("ves_hvRanMeas")
60 withFixedPartitioning()
63 ).doOnNext { logger.info("Applied default configuration") }
65 private fun createConsulFlux(): Flux<CollectorConfiguration> = Flux
66 .interval(firstRequestDelay, requestInterval)
67 .flatMap { http.get(url) }
69 logger.error("Encountered an error " +
70 "when trying to acquire configuration from consul. Shutting down..")
72 .map(::parseJsonResponse)
73 .map(::extractEncodedConfiguration)
74 .flatMap(::filterDifferentValues)
75 .map(::decodeConfiguration)
76 .map(::createCollectorConfiguration)
78 private fun parseJsonResponse(responseString: String): JsonObject =
79 Json.createReader(StringReader(responseString)).readArray().first().asJsonObject()
81 private fun extractEncodedConfiguration(response: JsonObject): String =
82 response.getString("Value")
84 private fun filterDifferentValues(base64Value: String): Mono<String> {
85 val newHash = hashOf(base64Value)
86 return if (newHash == lastConfigurationHash.get()) {
89 lastConfigurationHash.set(newHash)
90 Mono.just(base64Value)
94 private fun hashOf(str: String) = str.hashCode()
96 private fun decodeConfiguration(encodedConfiguration: String): JsonObject {
97 val decodedValue = String(Base64.getDecoder().decode(encodedConfiguration))
98 logger.info("Obtained new configuration from consul:\n$decodedValue")
99 return Json.createReader(StringReader(decodedValue)).readObject()
102 private fun createCollectorConfiguration(configuration: JsonObject): CollectorConfiguration {
103 val routing = configuration.getJsonArray("routing")
105 return CollectorConfiguration(
106 kafkaBootstrapServers = configuration.getString("kafkaBootstrapServers"),
107 routing = org.onap.dcae.collectors.veshv.model.routing {
108 for (route in routing) {
109 val routeObj = route.asJsonObject()
111 fromDomain(forNumber(routeObj.getInt("fromDomain")))
112 toTopic(routeObj.getString("toTopic"))
113 withFixedPartitioning()
121 private val logger = LoggerFactory.getLogger(ConsulConfigurationProvider::class.java)