to do an API call with timeout I would race it with `IO.sleep`: ``` val callWithTimeout: IO<Mode...

# arrow

[stojan]

to do an API call with timeout I would race it with `IO.sleep`:

val callWithTimeout: IO<Model> = IO.raceN(
            IO.effect { service.getModel() },
            IO.sleep(2.seconds)
        )

right?

[Satyam Agarwal]

+

[simon.vergauwen]

Yes, there is an out of the box operator for that as well. waitFor takes a nullable default value which defaults to IO.raiseError(TimeOut)

[Satyam Agarwal]

However there is resilience4j works very well both with timeout and as circuit breaker

[Satyam Agarwal]

however resilience4j works very nicely both as circuit breaker and timeout

object ExtApiCommand {

    private const val executionTimeoutMillis = 7000L
    private const val commandKey = "ExtApi"

    val circuitBreaker: CircuitBreaker = circuitBreakerRegistry.circuitBreaker(commandKey)

    private val timeLimiterConfig: TimeLimiterConfig = TimeLimiterConfig
        .custom()
        .timeoutDuration(Duration.ofMillis(executionTimeoutMillis))
        .build()
    private val timeLimiter: TimeLimiter = timeLimiterRegistry.timeLimiter(commandKey, timeLimiterConfig)

    private val backendCall: suspend (HttpClient, HttpRequestBuilder) -> String =
        { client, requestData ->
            circuitBreaker.executeSuspendFunction {
                timeLimiter.executeSuspendFunction { client.request<String>(requestData) }
            }
        }

    fun execute(httpClient: HttpClient, request: HttpRequestBuilder): IO<String> {
        return IO
            .effect(httpClient.coroutineContext + MDCContext()) { backendCall(httpClient, request) }
    }
}

[Satyam Agarwal]

Sorry for mess. Did it via phone