How to not block a Plumber endpoint using Mirai ?

[avhz]

Hi, thanks for the great package :)

I am making a Plumber API and am wondering how I can prevent an endpoint from blocking when using Mirai ?

For example:

mirai::daemons(2L)

#* @get /echo
function(msg = "") {
    list(msg = sprintf("The message is %s", msg))
}

#* @get /sleep
foo <- function() {
    mirai::mirai({ Sys.sleep(10L); rnorm(1) })
}

The API itself is not blocked when I call /sleep (I can still call the /echo endpoint while it processes), but the /sleep endpoint is blocked for 10 seconds.

Any tips ?

[shikokuchuo]

I think it's doing what it's designed to do.

The function within the mirai() call is sent for execution on one of the 2 daemons and hence doesn't block the app.

However, if you are performing a synchronous http request then it will block for you. If not, how else would the data be returned? You can use an asynchronous http client such as nanonext::ncurl_aio() to make a request without blocking.