That may work, too, but it sure sounds like an awfully heavy way to do it. -- Gary L. Wade (Sent from my iPhone) http://www.garywade.com/
> On Jun 28, 2016, at 2:16 PM, Peter Tomaselli <vast.gra...@gmail.com> wrote: > > In the past I’ve used NSOperation for this — wrap each request in an async > NSOperation that only signals completion to its queue when its DataTask > completion handler is complete. Then you can blast a bunch of them at a > serial queue and they will come out serially until they are done. > >> On Tue, Jun 28, 2016 at 4:35 PM, Gary L. Wade <garyw...@desisoftsystems.com> >> wrote: >> Try using a mutex on your array of requests, when adding and removing them, >> and only pull a request off the array when you're done with your completion >> handler or when you have nothing in progress such as when you first start. >> -- >> Gary L. Wade (Sent from my iPhone) >> http://www.garywade.com/ >> >> > On Jun 28, 2016, at 1:16 PM, Jim Adams <jim.ad...@sas.com> wrote: >> > >> > Unfortunately, with a multi threaded system, I cannot figure out a way to >> > do that. Ideas appreciated. >> > >> > My network calls could come from any thread. I could see putting the >> > request into a queue, but how to I make the completion handler run on that >> > same queue so it remains blocked? >> > >> >> On Jun 28, 2016, at 4:11 PM, Gary L. Wade <garyw...@desisoftsystems.com> >> >> wrote: >> >> >> >> The simplest way to do what you're asking is to not send another request >> >> until your completion handler finishes. >> >> -- >> >> Gary L. Wade (Sent from my iPhone) >> >> http://www.garywade.com/ >> >> >> >>> On Jun 28, 2016, at 12:52 PM, Jim Adams <jim.ad...@sas.com> wrote: >> >>> >> >>> I have an application that has the requirement that the accesses to the >> >>> server be single threaded, i.e. the second request cannot go through >> >>> until the first request has completed. I am using NSURLSession and >> >>> NSURLSessionDataTask. I have set the Maximum Concurrent Host number in >> >>> the configuration to 1 but I have seen evidence that there are >> >>> simultaneous requests going up to my servers. >> >>> >> >>> Actually I don’t think they are truly simultaneous, just that the >> >>> completion handler doesn’t finish before the next request goes out. Is >> >>> there a way to make the next request wait until the completion block is >> >>> exited? >> >>> >> >>> My evidence comes from looking in the server logs. I have 3 servers in >> >>> AWS behind an ELB. If I am able to get the cookies back from the server >> >>> before sending the next request then my request will go to the same >> >>> server that the last request went to. If I don’t wait then then the >> >>> request goes to a random server. If I watch the logs I can see the >> >>> requests come in on multiple servers. >> > _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
