I guess I ought to just debug my servers through a keyhole like everyone else.
On Fri, Jan 6, 2012 at 4:13 AM, bill lam <bbill....@gmail.com> wrote: > Yes, it will be available in the next update. > > I previously used wd'timer' in a web server, but later I turned it into a > window service and UI was no longer visible, so that I replace j.exe by > jconsole.exe , wd'timer' by sleep loop. Perhaps it worked because most > bugs had been fixed earlier. > > Птн, 06 Янв 2012, Ian Clark писал(а): >> Thanks Bill. >> >> usleep is good to know. I have taken note of its technique. Did you >> say it will become part of the base library? >> >> I've tried it out in jhs. I can't see it behaves any differently from, say: >> 2!:1 'sleep 3' >> or: >> (6!:3) 3 >> -they all freeze the jijx window. In operational use that won't matter >> for a faceless server. But for dev/debug it's nice to have the session >> available whilst the server is listening, as I get with the j602 >> versions of my apps. Eric's technique seems to solve the problem. >> >> On Fri, Jan 6, 2012 at 1:33 AM, bill lam <bbill....@gmail.com> wrote: >> > For jconsole applications that have no UI, the infinite loop can emulate an >> > inaccurate timer, >> > >> > while 1[usleep 20000 do. NB. 0.02s >> > dotask1'' >> > dotask2'' >> > ... >> > end. >> > >> > where usleep is (beware of wrapping) >> > >> > NB. ========================================================= >> > NB. *usleep v sleep for n microseconds >> > NB. linux max value around 33 minutes >> > NB. windows minimum resolution in milliseconds. >> > 3 : 0'' >> > if. 'Linux'-:UNAME do. usleep=: 3 : '''libc.so.6 usleep > i i''&(15!:0) >> > >.y' >> > elseif. 'Darwin'-:UNAME do. usleep=: 3 : '''libc.dylib usleep > i >> > i''&(15!:0) >.y' >> > elseif. do. usleep=: 3 : '0: ''kernel32 Sleep > n i''&(15!:0) >.y % 1000' >> > end. >> > EMPTY >> > ) >> > >> > But I guess this method does not work with jhs yet, the javascript timer as >> > suggested by Eric should be more compatibile with jhs. >> > >> > For gtk, timer is already supported, please refer to plot demo or opengl >> > demo. (grep for the word 'timeout') >> > >> > Чтв, 05 Янв 2012, Ian Clark писал(а): >> >> > Ian - a good place to study j use of dylib in Darwin would be in >> >> > ~/addons/data/jmf.ijs Maybe you can find happiness there. >> >> >> >> Now that looks sensible! >> >> >> >> Searching the code for 'dylib' I learn that cd (15!:0) can access >> >> dylibs, here mostly libc.dylib, just like it does in Windows (with of >> >> course a different argument syntax). Why didn't I spot that before? >> >> Now I just need to brush up my knowledge of the standard C library >> >> (=libc). A simple matter of wading thru the Xcode documentation. >> >> >> >> > Meanwhile, I'm a little unclear on what you are trying to do. >> >> >> >> Let me try to explain as briefly as I can. >> >> >> >> I have a bunch of j602 apps with fine-tuned jwd UIs which I want to >> >> migrate to j7. Including a few cherished app dev utilities. "Oh, just >> >> rewrite them all in jgtk" ... sounds plausible if you say it quickly. >> >> >> >> I reasoned, as a first step: if I can split off the jwd UI to run in >> >> an asynchronous process communicating via a link that's both general >> >> and docile, then that's half the battle. I can then replace the UIs at >> >> my leisure with ones written in Cocoa / Xcode -- or jgtk -- or >> >> html/javascript... you name it. Perhaps all of these, for a >> >> distributed app. The now-faceless apps will like-as-not run unchanged >> >> under J7, as "servers", and they'll even work with their old j601 UIs, >> >> while I develop plug-compatible replacements. That's if I feel the >> >> urge to. >> >> >> >> Well, I'm pleased to report I can now split even a complex jwd app >> >> into client+server, without having to re-engineer the app's UI (too >> >> much). My lo-tech link is sweet and docile: you can interact with both >> >> client and server via their J sessions and you hardly realise they're >> >> alive and talking to each other. A wiki case-study will follow >> >> shortly. >> >> >> >> But... my technique doesn't port readily to j7 because of one thing: >> >> no wd'timer'. >> >> >> >> Actually this isn't such a show-stopper as I'm making out. I can >> >> always run my "server" duty-cycle instead in a tight loop, as you do >> >> yours (...6!:3 is "tight" to me :). The back-end of the app, I reason, >> >> will not need that much debugging by now, and I can do most of that >> >> back in my cosy j602 environment. But I've got mighty used to the >> >> elbow-room that wd'timer' affords me. >> >> >> >> On Thu, Jan 5, 2012 at 7:13 PM, Joey K Tuttle <j...@qued.com> wrote: >> >> > Ian - a good place to study j use of dylib in Darwin would be in >> >> > ~/addons/data/jmf.ijs Maybe you can find happiness there. >> >> > >> >> > Meanwhile, I'm a little unclear on what you are trying to do. I assume >> >> > you have a continuously available j task that picks up things to do from >> >> > some queue - but you don't want it to be in a dead loop checking the >> >> > queue. I run a task like that in my Linux server and it has the lines: >> >> > >> >> > while. * 6!:3 ] 1 do. >> >> > if. (work to do) do. >> >> > massage some data (actually quite a lot... but sporadic) >> >> > end. >> >> > end. >> >> > >> >> > This task runs as a #! jconsole shell and I just looked to see that it >> >> > has been running for 100 days and has accumulated 20 minutes and 15 >> >> > seconds of CPU time (on a 400 Mhz pentium - so pretty small overhead). >> >> > Of course, the CPU usage is dependent on the work that gets done - but >> >> > since (as you pointed out in a different message) j is single threaded, >> >> > this seems to me to be a way to approach the kind of thing you seem to >> >> > be describing. >> >> > >> >> > On 2012/01/05 09:54 , Ian Clark wrote: >> >> >> Thanks, David. >> >> >> >> >> >> But this uses 'dll'. AFAIK there's no comparable way of calling dylibs >> >> >> in Darwin. >> >> >> >> >> >> On Thu, Jan 5, 2012 at 5:44 PM, David Mitchell<davidmitch...@att.net> >> >> >> wrote: >> >> >>> Here is a version that works with J602 and J701 jconsole. It does >> >> >>> not work with >> >> >>> jhs or jgtk. I have not tested it extensively and it may have side >> >> >>> effects or >> >> >>> bugs that I haven't found yet. >> >> >>> >> >> >>> http://www.jsoftware.com/jwiki/Scripts/WindowsTimer >> >> >>> >> >> >>> On 1/5/2012 8:27, Ian Clark wrote: >> >> >>>> How do I get a timer in j701 jhs (or jconsole)? >> >> >>>> >> >> >>>> I've been assuming wd (11!:0) doesn't work at all in j701 (in j602 >> >> >>>> you'd do: 11!:0 'timer 3' for a callback in 3 secs). >> >> >>>> >> >> >>>> BTW J701 help >> >> >>>> (http://www.jsoftware.com/docs/help701/dictionary/dx011.htm) >> >> >>>> still refers to 11!:0 but I assume that's just because it's been >> >> >>>> overlooked...? >> >> >>>> >> >> > >> >> > ---------------------------------------------------------------------- >> >> > For information about J forums see http://www.jsoftware.com/forums.htm >> >> ---------------------------------------------------------------------- >> >> For information about J forums see http://www.jsoftware.com/forums.htm >> > >> > -- >> > regards, >> > ==================================================== >> > GPG key 1024D/4434BAB3 2008-08-24 >> > gpg --keyserver subkeys.pgp.net --recv-keys 4434BAB3 >> > ---------------------------------------------------------------------- >> > For information about J forums see http://www.jsoftware.com/forums.htm >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm > > -- > regards, > ==================================================== > GPG key 1024D/4434BAB3 2008-08-24 > gpg --keyserver subkeys.pgp.net --recv-keys 4434BAB3 > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
