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/*
* ============LICENSE_START=======================================================
* dcaegen2-collectors-veshv
* ================================================================================
* Copyright (C) 2018 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.utils.arrow
import arrow.core.Either
import arrow.core.Left
import arrow.core.Right
import arrow.effects.IO
import org.reactivestreams.Publisher
import reactor.core.publisher.Flux
import reactor.core.publisher.Mono
import reactor.core.publisher.toMono
import kotlin.system.exitProcess
/**
* @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
* @since June 2018
*/
sealed class ExitCode {
abstract val code: Int
fun io() = IO {
exitProcess(code)
}
}
object ExitSuccess : ExitCode() {
override val code = 0
}
data class ExitFailure(override val code: Int) : ExitCode()
inline fun <A, B> Either<IO<A>, IO<B>>.unsafeRunEitherSync(onError: (Throwable) -> ExitCode, onSuccess: () -> Unit) =
flatten().attempt().unsafeRunSync().fold({ onError(it).io().unsafeRunSync() }, { onSuccess() })
fun IO<Any>.unit() = map { Unit }
fun <T> Mono<T>.asIo() = IO.async<T> { callback ->
subscribe({
callback(Right(it))
}, {
callback(Left(it))
})
}
fun <T> Publisher<T>.then(callback: () -> Unit): Mono<Unit> =
toMono().then(Mono.fromCallable(callback))
fun <T> Flux<IO<T>>.evaluateIo(): Flux<T> =
flatMap { io ->
io.attempt().unsafeRunSync().fold(
{ Flux.error<T>(it) },
{ Flux.just<T>(it) }
)
}
inline fun <T> IO<T>.then(crossinline block: (T) -> Unit): IO<T> =
map {
block(it)
it
}
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