2 * ============LICENSE_START=======================================================
3 * dcaegen2-collectors-veshv
4 * ================================================================================
5 * Copyright (C) 2018-2019 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.config.impl
22 import arrow.core.toOption
23 import com.google.gson.JsonObject
24 import org.onap.dcae.collectors.veshv.config.api.ConfigurationStateListener
25 import org.onap.dcae.collectors.veshv.utils.logging.Logger
26 import org.onap.dcae.collectors.veshv.utils.logging.MappedDiagnosticContext
27 import org.onap.dcae.collectors.veshv.utils.logging.onErrorLog
28 import org.onap.dcae.collectors.veshv.utils.reader
29 import org.onap.dcaegen2.services.sdk.model.streams.StreamType.KAFKA
30 import org.onap.dcaegen2.services.sdk.model.streams.dmaap.KafkaSink
31 import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.streams.DataStreams
32 import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.streams.StreamFromGsonParser
33 import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.streams.StreamFromGsonParsers
34 import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.streams.StreamPredicates.streamOfType
35 import reactor.core.publisher.Flux
36 import reactor.retry.Retry
39 * @author Jakub Dudycz <jakub.dudycz@nokia.com>
42 internal class CbsConfigurationProvider(private val cbsClientAdapter: CbsClientAdapter,
43 private val configParser: JsonConfigurationParser,
44 private val configurationStateListener: ConfigurationStateListener,
45 private val mdc: MappedDiagnosticContext,
46 retrySpec: Retry<Any>,
47 private val streamParser: StreamFromGsonParser<KafkaSink> =
48 StreamFromGsonParsers.kafkaSinkParser()
50 private val retry = retrySpec.doOnRetry {
51 logger.withWarn(mdc) {
52 log("Exception from configuration provider client, retrying subscription", it.exception())
54 configurationStateListener.retrying()
57 operator fun invoke(): Flux<PartialConfiguration> =
58 cbsClientAdapter.configurationUpdates()
59 .doOnNext { logger.info(mdc) { "Received new configuration:\n$it" } }
60 .map(::parseConfiguration)
61 .doOnNext { logger.info(mdc) { "Successfully parsed configuration json to:\n$it" } }
62 .onErrorLog(logger, mdc) { "Error while creating configuration" }
65 private fun parseConfiguration(json: JsonObject) =
68 .apply { streamPublishers = extractStreamDefinitions(json).toOption() }
70 private fun extractStreamDefinitions(configuration: JsonObject): List<KafkaSink> =
71 DataStreams.namedSinks(configuration)
72 .filter(streamOfType(KAFKA))
73 .map(streamParser::unsafeParse)
78 private val logger = Logger(CbsConfigurationProvider::class)