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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.logging
import arrow.core.Either
import arrow.core.Option
import arrow.core.Try
import reactor.core.publisher.Flux
import reactor.core.publisher.Mono
typealias MessageEither = Either<() -> String, () -> String>
fun <T> Logger.handleReactiveStreamError(
context: MappedDiagnosticContext,
ex: Throwable,
returnFlux: Flux<T> = Flux.empty()): Flux<T> {
warn(context) { "Error while handling message stream: ${ex::class.qualifiedName} (${ex.localizedMessage})" }
withDebug(context) { log("Detailed stack trace", ex) }
return returnFlux
}
fun <T> Try<T>.filterFailedWithLog(logger: Logger,
context: MappedDiagnosticContext,
acceptedMsg: (T) -> String,
rejectedMsg: (Throwable) -> String): Flux<T> =
fold({ ex ->
logger.withWarn(context) { log(rejectedMsg(ex)) }
Flux.empty<T>()
}, { obj ->
logger.trace(context) { acceptedMsg(obj) }
Flux.just(obj)
})
fun <T> Option<T>.filterEmptyWithLog(logger: Logger,
context: MappedDiagnosticContext,
acceptedMsg: (T) -> String,
rejectedMsg: () -> String): Flux<T> =
fold({
logger.warn(context, rejectedMsg)
Flux.empty<T>()
}, {
logger.trace(context) { acceptedMsg(it) }
Flux.just(it)
})
fun <T> Flux<T>.filterFailedWithLog(logger: Logger,
context: MappedDiagnosticContext,
predicate: (T) -> MessageEither): Flux<T> =
flatMap { t ->
predicate(t).fold({
logger.warn(context, it)
Mono.empty<T>()
}, {
logger.trace(context, it)
Mono.just<T>(t)
})
}
fun <T> Mono<T>.onErrorLog(logger: Logger,
mdc: () -> Map<String, String>,
msg: () -> String) =
doOnError { logException(logger, mdc, msg, it) }
fun <T> Flux<T>.onErrorLog(logger: Logger,
mdc: () -> Map<String, String>,
msg: () -> String) =
doOnError { logException(logger, mdc, msg, it) }
private fun logException(logger: Logger, mdc: () -> Map<String, String>, msg: () -> String, it: Throwable) {
logger.error(mdc) { "${msg()}: ${it.message}" }
logger.debug(mdc) { "Detailed stack trace: ${it}" }
}
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