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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.Either
import arrow.core.Option
import arrow.core.Try
import arrow.core.getOrElse
import org.apache.commons.cli.CommandLine
import org.apache.commons.cli.CommandLineParser
import org.apache.commons.cli.DefaultParser
import org.apache.commons.cli.Options
import org.onap.dcae.collectors.veshv.commandline.CommandLineOption.CONFIGURATION_FILE
import org.onap.dcae.collectors.veshv.commandline.CommandLineOption.HEALTH_CHECK_API_PORT
import org.onap.dcae.collectors.veshv.commandline.WrongArgumentError
import org.onap.dcae.collectors.veshv.commandline.intValue
import org.onap.dcae.collectors.veshv.commandline.stringValue
import org.onap.dcae.collectors.veshv.utils.logging.Logger
import java.io.File
internal class HvVesCommandLineParser(private val parser: CommandLineParser = DefaultParser()) {
private val cmdLineOptionsList = listOf(CONFIGURATION_FILE, HEALTH_CHECK_API_PORT)
private lateinit var parsedCommandLine: CommandLine
fun getConfigurationFile(args: Array<out String>): Either<WrongArgumentError, File> =
parse(args) {
it.stringValue(CONFIGURATION_FILE).map(::File)
}.toEither {
WrongArgumentError(
message = "Unexpected error when parsing command line arguments",
cmdLineOptionsList = cmdLineOptionsList)
}
fun getHealthcheckPort(args: Array<out String>): Int =
parse(args) {
it.intValue(HEALTH_CHECK_API_PORT)
}.getOrElse {
logger.info { "Healthcheck port missing on command line," +
" using default: $DEFAULT_HEALTHCHECK_PORT" }
DEFAULT_HEALTHCHECK_PORT
}
private fun <T> parse(args: Array<out String>, cmdLineMapper: (CommandLine) -> Option<T>) =
Try { parseIfNotInitialized(args) }
.toOption()
.flatMap(cmdLineMapper)
private fun parseIfNotInitialized(args: Array<out String>): CommandLine {
if (!this::parsedCommandLine.isInitialized) {
parsedCommandLine = parseArgumentsArray(args)
}
return parsedCommandLine
}
private fun parseArgumentsArray(args: Array<out String>) =
cmdLineOptionsList
.map { it.option }
.fold(Options(), Options::addOption)
.let { parser.parse(it, args) }
companion object {
private const val DEFAULT_HEALTHCHECK_PORT: Int = 6060
private val logger = Logger(HvVesCommandLineParser::class)
}
}
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