Thank you, that helps a lot.
Le vendredi 19 juin 2020 15:49:22 UTC+2, Andrei Tudor Călin a écrit : > > Goroutines can only be stopped if they cooperate. They have no user-facing > identity or a handle by which they can be stopped. To cooperate, they need > to be checking some kind of cancellation flag or channel, periodically. > These days, for HTTP servers, that channel is the request context, since > CloseNotifier is deprecated. > > To reduce the potential cost of using select in a tight processing loop, > you could select on the channel only every N iterations, or maybe after T > time has passed since you last checked. If selects are prohibitively > expensive for you, you could check an atomic flag instead, and control the > flag through an external goroutine which waits for <-ctx.Done(). There is a > little bit more machinery here, but I expect this to be at least a little > faster than a select. > > In any case, these things must happen explicitly: code that wants to be > responsive to cancellation signals must be programmed as such. > > > On Fri, Jun 19, 2020 at 3:58 PM Thomas S <soli...@gmail.com <javascript:>> > wrote: > >> Hello, >> >> I have an HTTP server providing heavy algorithms. Sometimes, the clients >> closes the connection prematurely, before the end of computing. >> >> Note : Sometimes the client consuming these algorithms want to stop the >> process if the solution is not found before X minutes for example. >> >> This article : >> https://gianarb.it/blog/go-http-cleanup-http-connection-terminated >> shows how to use the "http.CloseNotifier" chan to receive the signal >> about the premature end of connection. >> >> *However*, >> >> The algorithm is made of several thousands of lines, called proceduraly, >> and sometimes even calling parallel computing on goroutines and recursive >> functions. >> >> It means that I should share the chan everywhere, to every functions or >> almost, insert a boilerplate of channel check frequently in the algorithm, >> and make an exit if needed. >> >> It seems to me pretty awful. Am I missing something ? >> >> >> Thanks a lot, >> >> -- >> You received this message because you are subscribed to the Google Groups >> "golang-nuts" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to golan...@googlegroups.com <javascript:>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/golang-nuts/ad1221ad-0ac6-4282-a708-20ab8d49fa5co%40googlegroups.com >> >> <https://groups.google.com/d/msgid/golang-nuts/ad1221ad-0ac6-4282-a708-20ab8d49fa5co%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > > > -- > Andrei Călin > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/98a4a95a-5a08-4ff7-85d9-0c02869e6a43o%40googlegroups.com.
