output-service-rdb-consumer/src/main/kotlin/mq/DatabaseConsumer.kt

package mq

import api.ApiObject
import com.rabbitmq.client.*
import database.service.IResultObjectService
import kotlinx.serialization.decodeFromString
import kotlinx.serialization.json.Json
import org.koin.core.component.KoinComponent
import org.koin.core.component.inject

class DatabaseConsumer(channel: Channel): Consumer, KoinComponent {
    private val resultObjectService : IResultObjectService by inject()
    private val basicChannel = channel
    override fun handleConsumeOk(consumerTag : String?) {
    }
    override fun handleCancelOk(p0 : String?) {
        throw UnsupportedOperationException()
    }
    override fun handleRecoverOk(p0 : String?) {
        throw UnsupportedOperationException()
    }
    override fun handleCancel(p0 : String?) {
        throw UnsupportedOperationException()
    }

    override fun handleShutdownSignal(consumerTag: String?, sig: ShutdownSignalException?) {
        println("got shutdown signal")
    }

    override fun handleDelivery(consumerTag : String?, envelope : Envelope?, basicProperties : AMQP.BasicProperties?, body : ByteArray?) {
        try {
            val rawJson = body!!.toString(Charsets.UTF_8)
            val apiObject = Json.decodeFromString<ApiObject>(rawJson)
            resultObjectService.addOne(apiObject)
            basicChannel.basicAck(envelope!!.deliveryTag, false)
        } catch (e: Exception) {
            println(e.message)
            basicChannel.basicNack(envelope!!.deliveryTag, false, true)
        }
        }
}