ExecutorService

ExecutorService

<http://Dispatchers.IO|Dispatchers.IO>

fun CoroutineDispatcher.asExecutor(): Executor = CoroutineScopeExecutor(this)

private class CoroutineScopeExecutor(private val dispatcher: CoroutineDispatcher) : CoroutineScope, Executor {
    private val job = SupervisorJob()
    override val coroutineContext get() = dispatcher + job
    override fun execute(command: Runnable) {
        if (!job.isActive) {
            throw RejectedExecutionException("Job has been closed")
        }

        launch {
            command.run()
        }
    } 
}