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/*
* ============LICENSE_START=======================================================
* dcaegen2-collectors-veshv
* ================================================================================
* Copyright (C) 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.api
import org.onap.dcae.collectors.veshv.config.api.model.HvVesConfiguration
import org.onap.dcae.collectors.veshv.config.api.model.MissingArgumentException
import org.onap.dcae.collectors.veshv.config.impl.CbsConfigurationProvider
import org.onap.dcae.collectors.veshv.config.impl.ConfigurationMerger
import org.onap.dcae.collectors.veshv.config.impl.ConfigurationTransformer
import org.onap.dcae.collectors.veshv.config.impl.ConfigurationValidator
import org.onap.dcae.collectors.veshv.config.impl.CbsClientAdapter
import org.onap.dcae.collectors.veshv.config.impl.HvVesCommandLineParser
import org.onap.dcae.collectors.veshv.config.impl.JsonConfigurationParser
import org.onap.dcae.collectors.veshv.config.impl.PartialConfiguration
import org.onap.dcae.collectors.veshv.utils.arrow.throwOnLeft
import org.onap.dcae.collectors.veshv.utils.logging.Logger
import org.onap.dcae.collectors.veshv.utils.logging.MappedDiagnosticContext
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.CbsClient
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.CbsClientFactory
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.model.EnvProperties
import reactor.core.publisher.Flux
import reactor.core.publisher.Mono
import reactor.retry.Jitter
import reactor.retry.Retry
import java.time.Duration
class ConfigurationModule internal constructor(private val configStateListener: ConfigurationStateListener,
private val cbsClient: Mono<CbsClient>) {
private val cmd = HvVesCommandLineParser()
private val configParser = JsonConfigurationParser()
private val configMerger = ConfigurationMerger()
private val configValidator = ConfigurationValidator()
private val configTransformer = ConfigurationTransformer()
constructor(configStateListener: ConfigurationStateListener) : this(
configStateListener,
CbsClientFactory.createCbsClient(EnvProperties.fromEnvironment())
)
fun healthCheckPort(args: Array<String>): Int = cmd.getHealthcheckPort(args)
fun hvVesConfigurationUpdates(args: Array<String>,
mdc: MappedDiagnosticContext): Flux<HvVesConfiguration> =
Mono.just(cmd.getConfigurationFile(args))
.throwOnLeft(::MissingArgumentException)
.doOnNext { logger.info { "Using base configuration file: ${it.absolutePath}" } }
.map { it.reader().use(configParser::parse) }
.doOnNext { logger.info { "Successfully parsed configuration file to: $it" } }
.cache()
.flatMapMany { basePartialConfig ->
cbsClientAdapter(basePartialConfig, mdc).let { cbsClientAdapter ->
cbsConfigurationProvider(cbsClientAdapter, mdc)
.invoke()
.map { configMerger.merge(basePartialConfig, it) }
.map(configValidator::validate)
.throwOnLeft()
.map(configTransformer::toFinalConfiguration)
.doOnNext {
cbsClientAdapter.updateCbsInterval(it.cbs.requestInterval)
}
}
}
private fun cbsClientAdapter(basePartialConfig: PartialConfiguration,
mdc: MappedDiagnosticContext) = CbsClientAdapter(
cbsClient,
cbsConfigurationFrom(basePartialConfig).firstRequestDelay,
configStateListener,
mdc,
infiniteRetry
)
private fun cbsConfigurationProvider(cbsClientAdapter: CbsClientAdapter,
mdc: MappedDiagnosticContext) = CbsConfigurationProvider(
cbsClientAdapter,
configParser,
configStateListener,
mdc,
infiniteRetry
)
private fun cbsConfigurationFrom(basePartialConfig: PartialConfiguration) =
configValidator.validatedCbsConfiguration(basePartialConfig)
.let { configTransformer.toCbsConfiguration(it) }
companion object {
private val logger = Logger(ConfigurationModule::class)
private val FIRST_BACKOFF_DURATION = Duration.ofSeconds(5)
private val MAX_BACKOFF_DURATION = Duration.ofMinutes(5)
private val infiniteRetry: Retry<Any> = Retry.any<Any>()
.retryMax(Long.MAX_VALUE)
.exponentialBackoff(FIRST_BACKOFF_DURATION, MAX_BACKOFF_DURATION)
.jitter(Jitter.random())
}
}
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