gist for CleanAndroidCode article series https://medium.com/@anton.averin.dev/keep-your-droid-clean-e9c093140eb6

CleanAndroidCode :: Error Handling :: Resolution.kt

interface RxHttpResolution {
    fun onHttpException(httpException: HttpException)
    fun onGenericRxException(t: Throwable)
}

interface NetworkConnectivityResolution {
    fun onConnectivityAvailable()
    fun onConnectivityUnavailable()
}

interface LocationRequestResolution {
    fun onNetworkLocationError()
}

interface Resolution : RxHttpResultion, NetworkConnectivityResolution, LocationRequestResolution {
}

CleanAndroidCode :: Error Handling :: ResolutionByCase.kt

abstract class ResolutionByCase : Resolution {

    override fun onHttpException(httpException: HttpException) {
        val code = httpException.code()
        when (code) {
            500 -> onInternalServerError()
            503 -> onServiceUnavailable()
            404 -> onNotFound()
            else -> onInternalServerError()
        }
    }

    abstract fun onInternalServerError()

    abstract fun onNotFound()

    abstract fun onServiceUnavailable()
}