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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.main
import arrow.effects.IO
import arrow.effects.fix
import arrow.effects.instances.io.monad.monad
import arrow.effects.instances.io.monadError.monadError
import arrow.typeclasses.binding
import org.onap.dcae.collectors.veshv.commandline.handleWrongArgumentErrorCurried
import org.onap.dcae.collectors.veshv.healthcheck.api.HealthDescription
import org.onap.dcae.collectors.veshv.healthcheck.api.HealthState
import org.onap.dcae.collectors.veshv.main.servers.HealthCheckServer
import org.onap.dcae.collectors.veshv.main.servers.VesServer
import org.onap.dcae.collectors.veshv.model.ServerConfiguration
import org.onap.dcae.collectors.veshv.model.ServiceContext
import org.onap.dcae.collectors.veshv.utils.Closeable
import org.onap.dcae.collectors.veshv.utils.ServerHandle
import org.onap.dcae.collectors.veshv.utils.arrow.ExitFailure
import org.onap.dcae.collectors.veshv.utils.arrow.unsafeRunEitherSync
import org.onap.dcae.collectors.veshv.utils.logging.Logger
import org.onap.dcae.collectors.veshv.utils.registerShutdownHook
private const val VESHV_PACKAGE = "org.onap.dcae.collectors.veshv"
private val logger = Logger("$VESHV_PACKAGE.main")
private const val PROGRAM_NAME = "java $VESHV_PACKAGE.main.MainKt"
fun main(args: Array<String>) =
ArgVesHvConfiguration().parse(args)
.mapLeft(handleWrongArgumentErrorCurried(PROGRAM_NAME))
.map(::startAndAwaitServers)
.unsafeRunEitherSync(
{ ex ->
logger.withError(ServiceContext::mdc) { log("Failed to start a server", ex) }
ExitFailure(1)
},
{ logger.debug(ServiceContext::mdc) { "Finished" } }
)
private fun startAndAwaitServers(config: ServerConfiguration) =
IO.monad().binding {
Logger.setLogLevel(VESHV_PACKAGE, config.logLevel)
logger.info { "Using configuration: $config" }
val healthCheckServerHandle = HealthCheckServer.start(config).bind()
VesServer.start(config).bind().let { handle ->
registerShutdownHook(closeServers(handle, healthCheckServerHandle)).bind()
handle.await().bind()
}
}.fix()
internal fun closeServers(vararg handles: ServerHandle, healthState: HealthState = HealthState.INSTANCE): IO<Unit> =
IO.monadError().binding {
healthState.changeState(HealthDescription.SHUTTING_DOWN)
Closeable.closeAll(handles.asIterable()).bind()
logger.info(ServiceContext::mdc) { "Graceful shutdown completed" }
}.fix()
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