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/*
* ============LICENSE_START=======================================================
* dcaegen2-collectors-veshv
* ================================================================================
* Copyright (C) 2018-2019 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.config.impl
import arrow.core.toOption
import com.google.gson.JsonObject
import org.onap.dcae.collectors.veshv.config.api.ConfigurationStateListener
import org.onap.dcae.collectors.veshv.utils.logging.Logger
import org.onap.dcae.collectors.veshv.utils.logging.MappedDiagnosticContext
import org.onap.dcae.collectors.veshv.utils.logging.onErrorLog
import org.onap.dcae.collectors.veshv.utils.reader
import org.onap.dcaegen2.services.sdk.model.streams.StreamType.KAFKA
import org.onap.dcaegen2.services.sdk.model.streams.dmaap.KafkaSink
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.streams.DataStreams
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.streams.StreamFromGsonParser
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.streams.StreamFromGsonParsers
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.streams.StreamPredicates.streamOfType
import reactor.core.publisher.Flux
import reactor.retry.Retry
/**
* @author Jakub Dudycz <jakub.dudycz@nokia.com>
* @since May 2018
*/
internal class CbsConfigurationProvider(private val cbsClientAdapter: CbsClientAdapter,
private val configParser: JsonConfigurationParser,
private val configurationStateListener: ConfigurationStateListener,
private val mdc: MappedDiagnosticContext,
retrySpec: Retry<Any>,
private val streamParser: StreamFromGsonParser<KafkaSink> =
StreamFromGsonParsers.kafkaSinkParser()
) {
private val retry = retrySpec.doOnRetry {
logger.withWarn(mdc) {
log("Exception from configuration provider client, retrying subscription", it.exception())
}
configurationStateListener.retrying()
}
operator fun invoke(): Flux<PartialConfiguration> =
cbsClientAdapter.configurationUpdates()
.doOnNext { logger.info(mdc) { "Received new configuration:\n$it" } }
.map(::parseConfiguration)
.doOnNext { logger.info(mdc) { "Successfully parsed configuration json to:\n$it" } }
.onErrorLog(logger, mdc) { "Error while creating configuration" }
.retryWhen(retry)
private fun parseConfiguration(json: JsonObject) =
configParser
.parse(json.reader())
.apply { streamPublishers = extractStreamDefinitions(json).toOption() }
private fun extractStreamDefinitions(configuration: JsonObject): List<KafkaSink> =
DataStreams.namedSinks(configuration)
.filter(streamOfType(KAFKA))
.map(streamParser::unsafeParse)
.asIterable()
.toList()
companion object {
private val logger = Logger(CbsConfigurationProvider::class)
}
}
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