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 java.io.StringReader
30 import java.time.Duration
31 import java.util.Base64
32 import java.util.concurrent.atomic.AtomicReference
33 import javax.json.Json
34 import javax.json.JsonObject
38 * @author Jakub Dudycz <jakub.dudycz@nokia.com>
41 internal class ConsulConfigurationProvider(private val url: String,
42 private val updateInterval: Duration,
43 private val http: HttpAdapter
44 ) : ConfigurationProvider {
47 private val logger = LoggerFactory.getLogger(ConsulConfigurationProvider::class.java)
48 private var lastConfigurationHash: AtomicReference<Int> = AtomicReference()
50 override fun invoke(): Flux<CollectorConfiguration> =
51 Flux.concat(createDefaultConfigurationFlux(), createConsulFlux())
53 private fun createDefaultConfigurationFlux(): Flux<CollectorConfiguration> = Flux.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.interval(updateInterval)
66 .flatMap { http.get(url) }
67 .doOnError { logger.error("Encountered an error when trying to acquire configuration from consul. " +
69 .filter { it.hashCode() != lastConfigurationHash.get() }
70 .doOnNext { lastConfigurationHash.set(it.hashCode()) }
71 .map { getConfigurationJson(it) }
72 .map { createCollectorConfiguration(it) }
75 private fun getConfigurationJson(str: String): JsonObject {
76 val response = Json.createReader(StringReader(str)).readArray().getJsonObject(0)
77 val decodedValue = String(
78 Base64.getDecoder().decode(response.getString("Value")))
79 logger.info("Obtained new configuration from consul:\n$decodedValue")
80 return Json.createReader(StringReader(decodedValue)).readObject()
83 private fun createCollectorConfiguration(configuration: JsonObject): CollectorConfiguration {
84 val routing = configuration.getJsonArray("routing")
86 return CollectorConfiguration(
87 kafkaBootstrapServers = configuration.getString("kafkaBootstrapServers"),
88 routing = org.onap.dcae.collectors.veshv.model.routing {
89 for (route in routing) {
90 val routeObj = route.asJsonObject()
92 fromDomain(forNumber(routeObj.getInt("fromDomain")))
93 toTopic(routeObj.getString("toTopic"))
94 withFixedPartitioning()