main_cor_composition.kt

fun main() {
    val executor = createActionExecutor()

    executor.executeByResponse(Response("print", "leonidas"))
    executor.executeByResponse(Response("log", "kotlin"))
    executor.executeByResponse(Response("write_to_file", "leonidas loves kotlin"))
    executor.executeByResponse(Response("print", "$&#$@#", isError = true))
}

private fun createActionExecutor(): ActionExecutor {
    val printInErrorStream = PrintInErrorStream().asChain { response -> response.isError }
    val justPrint = Print().asChain { true }

    return ActionExecutor().apply {
        addAction(printInErrorStream.or(justPrint))
        addAction(Log())
        addAction(WriteToFile())
    }
}