/*
 * mapper-service
 * Copyright (C) 2020 Memoriav
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

package org.memobase

import ch.memobase.settings.SettingsLoader
import org.apache.kafka.streams.KafkaStreams
import org.apache.logging.log4j.LogManager

class Service(file: String = "app.yml") {
    companion object {
        const val step = "mapper-service"
        const val configTopicNameProp = "configTopic"
    }

    private val log = LogManager.getLogger("MapperService")

    val settings = SettingsLoader(
        listOf(
            configTopicNameProp
        ),
        file,
        useStreamsConfig = true
    )
    fun run() {
        val stream = KafkaStreams(KafkaTopology(settings).prepare().build(), settings.kafkaStreamsSettings)
        stream.use {
            it.start()
            while (stream.state().isRunningOrRebalancing) {
                log.info("Service is running.")
                Thread.sleep(10_000L)
            }
            throw Exception("Stream stopped running!")
        }
    }
}