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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.impl
import arrow.core.None
import arrow.core.Option
import arrow.core.Some
import arrow.core.getOrElse
import arrow.core.toOption
import org.onap.dcae.collectors.veshv.utils.logging.LogLevel
/**
* @author Pawel Biniek <pawel.biniek@nokia.com>
* @since March 2019
*/
internal class ConfigurationMerger {
fun merge(base: PartialConfiguration, update: PartialConfiguration): PartialConfiguration =
PartialConfiguration(
mergeServerConfig(base.server, update.server),
mergeCbsConfig(base.cbs, update.cbs),
mergeSecurityConfig(base.security, update.security),
mergeCollectorConfig(base.collector, update.collector),
mergeLogLevel(base.logLevel, update.logLevel)
)
private fun mergeServerConfig(baseOption: Option<PartialServerConfig>,
updateOption: Option<PartialServerConfig>) =
applyUpdate(baseOption, updateOption) { base, update ->
PartialServerConfig(
base.listenPort.updateToGivenOrNone(update.listenPort),
base.idleTimeoutSec.updateToGivenOrNone(update.idleTimeoutSec),
base.maxPayloadSizeBytes.updateToGivenOrNone(update.maxPayloadSizeBytes)
)
}
private fun mergeCbsConfig(baseOption: Option<PartialCbsConfig>,
updateOption: Option<PartialCbsConfig>) =
applyUpdate(baseOption, updateOption) { base, update ->
PartialCbsConfig(
base.firstRequestDelaySec.updateToGivenOrNone(update.firstRequestDelaySec),
base.requestIntervalSec.updateToGivenOrNone(update.requestIntervalSec)
)
}
private fun mergeSecurityConfig(baseOption: Option<PartialSecurityConfig>,
updateOption: Option<PartialSecurityConfig>) =
applyUpdate(baseOption, updateOption) { base, update ->
PartialSecurityConfig(
base.keys.updateToGivenOrNone(update.keys)
)
}
private fun mergeCollectorConfig(baseOption: Option<PartialCollectorConfig>,
updateOption: Option<PartialCollectorConfig>) =
applyUpdate(baseOption, updateOption) { base, update ->
PartialCollectorConfig(
base.routing.updateToGivenOrNone(update.routing)
)
}
private fun mergeLogLevel(base: Option<LogLevel>, update: Option<LogLevel>) =
base.updateToGivenOrNone(update)
}
private fun <T> applyUpdate(base: Option<T>, update: Option<T>, overrider: (base: T, update: T) -> T) =
when {
base is Some && update is Some -> overrider(base.t, update.t).toOption()
base is Some && update is None -> base
base is None && update is Some -> update
else -> None
}
private fun <T> Option<T>.updateToGivenOrNone(update: Option<T>) =
update.getOrElse(this::orNull).toOption()
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