Squeak-dev July 2008

squeak-dev@lists.squeakfoundation.org

136 participants
183 discussions

Maintenance of remote references
by Sebastian Sastre 30 Jul '08

30 Jul '08

Hi there, Thing. I'm working in the RemoteObjects package that is a sort of RMI or RPC but for real objects ;) Right now is working > x2 than rST in localhost. It was designed in a P2P fashion and it allows to have N brokers even inside the same image. Purpose. Scaling Squeak today. Plan. Some of you helped with ideas and I plan to publish in squeak source (MIT) when minimally stability is reached. Status. Remote inspectors just started to work and I need to start thinking about making something for the maintenance of its cache. Problem. A broker can publish some objects but, as the communication get used, remote references start to be holded by them. Thats fine until you think in how to claim space without injecting troubles. Reference. As benchmarking I saw the rST way and I'm not satisfied with its model. Some objects end up being missed with time. Ideas. So I though about 1 making a kind of watchdog to maintain "alive" the remote references renovating the expiration period every time a remote message reach the object. Also I'm thinking in 2 the idea of the session. So when session is expired a whole group of references is claimed. Hears. Anyway I'm in analisys phase for this problem so I want to hear more ideas. So thinking loud is welcome. Thanks, Sebastian Sastre

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File creation time wrong on Mac
by stephane ducasse 30 Jul '08

30 Jul '08

Hi all Is it a well-known bug that the creation time is incorrectly reported on Mac? Time dateAndTimeFromSeconds: (FileDirectory default directoryEntryFor: 'ESUG2008.txt') creationTime It seems to be confused and return the last opened or last modified date. Then is there a way to modify the creationTime and other characteristic of a file? Stef

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About Selector vs Symbol
by stephane ducasse 29 Jul '08

29 Jul '08

Hello I wanted to see what you think about having a class Selector vs using Symbols. Apparently in Dave Simmons Smalltalk he could overrides Symbol to get selector namespace by providing === and = which would take namespace into account or not. Stef

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more on ... playing MPEG files
by John Richards 29 Jul '08

29 Jul '08

I found an MPEG1 video (only) file...i.e., not muxed with the audio...and Squeak seems to play it just fine. So the problem seems to be limited to this slightly more exotic format. Now I just need to figure out how to convert my existing files to this old format. John __________________ earlier note below __________________ Every technique I have tried for playing an MPEG movie file on the Mac OS (specifically an MPEG1 Muxed movie file) fails on load (it just goes into an endless spinning hourglass). This is true on both 3.9 and 3.10 and have not tested it on earlier versions. Anyone have any thoughts on this? For what it's worth, the file tests as a valid MPEG file when I do MPEGFile isFileValidMPEG: Thanks, John

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Q: FileStream class>>#writeSourceCodeFrom:* and *TextConverter
by Klaus D. Witzel 29 Jul '08

29 Jul '08

Hi, I'm trying to successfully fileOut and fileIn class and method comments with characters codePoint <= 255 (the "european" range of byte size characters). Fileout works but the file looks to have prefix from #writeBOMOn: of UTF8TextConverter and file suffix is ".st" or ".cs". On fileIn this fails with syntax error :( and Google search did not help. Has anyone experience with source code fileOut/fileIn for the "european" character range? Did a quick shot on FileStream class>>#writeSourceCodeFrom:*, with #isAsciiString replaced by #isWideString (followed by ifFalse:ifTrue:), filed out again and then fileIn was happy again. I understand this is perhaps not really sort of bug, but want a bit more than just the ascii characters. So what do you Squeakers recommend, how should that be done in a Squeak platform compatible way? TIA. /Klaus

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How to move the X in Squeak windows to the right side?
by askoh 29 Jul '08

29 Jul '08

Squeak windows has the X to close window button on the left side, which is opposite of Windows OS. How can I switch the X to the right side? Thanks, Aik-Siong Koh -- View this message in context: http://www.nabble.com/How-to-move-the-X-in-Squeak-windows-to-the-right-side… Sent from the Squeak - Dev mailing list archive at Nabble.com.

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Re: Re: [Swazoo-devel] Faster connection makes system unrespons ive
by "S.J.Chun" 29 Jul '08

29 Jul '08

OK, I'll respond on this email. On Windows, when I run Squeak VM with -headless option, even if multiple(4) file upload session is running, the system is very responsive. But if I run image with regular fashion(without -headless option), which means Squeak with its own window(sorry for my poor description), even single file upload from fast connection can make my sysetm(laptop) unresponsive. I suspect Windows scheduling algorithm or something like that does schedule applications differently from windowless application to application with window. But I'm not sure on this :-) So, for me, Squeak + Swazoo is good, acceptable platform for file upload/download service. Thank you. ----- Original Message ----- From: Janko Mivšek <janko.mivsek(a)eranova.si> To: "S.J.Chun" <chunsj(a)embian.com>, Squeak <squeak-dev(a)lists.squeakfoundation.org> Sent: 08-07-29 16:38:10 Subject: Re: [Swazoo-devel] Faster connection makes system unrespons ive I'm sending to the squeak mailing list too, because this Swazoo on Squeak problem is interesting more broadly. S.J.Chun wrote: > Hmm, it seems that I write too many messages :-) > > I found another interesting thing(which seems good for me). Only on windows, this problem > occurs. Which means that on other platform like Linux or Mac OS X, I can upload 2 or more > files concurrently but the system does not show any noticeable problem. And interesting part > is that also on windows, if I run squeak as a headless application or as a service application, > it does not make the system unresponsive. It seems that my previous problem is related to > scheduling on Windows. > > So, it seems that I could make my file upload/download server using Squeak + Swazoo without > big problems. > > Thank you. I hope my tons of messages can help anyone who might have same kind of problem > like me.(If not, I'm sorry for many uninteresting posts from me). Thank goes to you first and foremost and reporting all experiences you had is very worthwhile. Your experience shows possible problems with Swazoo on Squeak on Vista (or Windows in general) when image runs headfull, is that true? So, what's now a difference if you run headless or headfull, when Squeak GUI doesn't work at all anyway? JAnko > > ----- Original Message ----- > From: "S.J.Chun" <chunsj(a)embian.com> > To: Swazoo Development Discussions <swazoo-devel(a)lists.sourceforge.net>, Janko Mivšek <janko.mivsek(a)eranova.si> > Sent: 08-07-29 14:05:31 > Subject: [Swazoo-devel] Faster_connection_makes_system_unrespons ive_(WAS:_Re:__Swazoo_2.2beta_show_impressive_pe rformance_for_large_file_uploading) > > As my previous messages said, with faster network connection attached, > the system become unresponsive even with single file upload(100Mbit/1000Mbit). > > I suspect that squeak cannot process this input stream faster enough or swazoo > cannot process. Even my laptop does not have faster disk drive it is not accessed > continuously so I don't think slow disk makes problem. > > How can I improve current situation, are there any parameter to be modified? -- Janko Mivšek AIDA/Web Smalltalk Web Application Server http://www.aidaweb.si

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Re: [Seaside] [Q] File Upload/Download Server, Comanche or Swazoo
by Janko Mivšek 29 Jul '08

29 Jul '08

Philippe Marschall wrote: >> See this example from http://www.swazoo.org/streaming.html: >> >> Site>>answerTo: aHTTPRequest >> | stream | >> aHTTPRequest >> postDataAt: 'file' >> beforeStreamingDo: [:datum | >> stream := (SpFilename named: datum filename) writeStream. >> datum writeStream: stream]. >> >> aHTTPRequest ensureFullRead. "to be sure streaming occurs" >> stream close. "mandatory, to close open stream! " >> >> ^HTTPResponse ok >> >> >> In that example we open a file named as the original file, which is sent in >> request as post data, just before a file content. >> >> I hope that helps > > Nope sorry. See the attached code. Your example and the attachment > work only if there is an upload filed with the name 'file'. That's the > only upload filed that will be streamed. That's why the attached code > breaks. If you change the name of the upload field to 'file' then the > code breaks somewhere in MultiByteFileStream (Squeak 3.9 Mac VM). Philippe, first sorry for late answer. Time pressures ... I looked at your code, where you make a subclass of Site where is a test form with file input field , then post via streaming to output file. Problem is that you named file input field as "upload" while in my example it is expected to be "file". So, just adjust those two names and your example should work. Best regards Janko -- Janko Mivšek AIDA/Web Smalltalk Web Application Server http://www.aidaweb.si

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Re: [Swazoo-devel] Faster connection makes system unrespons ive
by Janko Mivšek 29 Jul '08

29 Jul '08

I'm sending to the squeak mailing list too, because this Swazoo on Squeak problem is interesting more broadly. S.J.Chun wrote: > Hmm, it seems that I write too many messages :-) > > I found another interesting thing(which seems good for me). Only on windows, this problem > occurs. Which means that on other platform like Linux or Mac OS X, I can upload 2 or more > files concurrently but the system does not show any noticeable problem. And interesting part > is that also on windows, if I run squeak as a headless application or as a service application, > it does not make the system unresponsive. It seems that my previous problem is related to > scheduling on Windows. > > So, it seems that I could make my file upload/download server using Squeak + Swazoo without > big problems. > > Thank you. I hope my tons of messages can help anyone who might have same kind of problem > like me.(If not, I'm sorry for many uninteresting posts from me). Thank goes to you first and foremost and reporting all experiences you had is very worthwhile. Your experience shows possible problems with Swazoo on Squeak on Vista (or Windows in general) when image runs headfull, is that true? So, what's now a difference if you run headless or headfull, when Squeak GUI doesn't work at all anyway? JAnko > > ----- Original Message ----- > From: "S.J.Chun" <chunsj(a)embian.com> > To: Swazoo Development Discussions <swazoo-devel(a)lists.sourceforge.net>, Janko Mivšek <janko.mivsek(a)eranova.si> > Sent: 08-07-29 14:05:31 > Subject: [Swazoo-devel] Faster_connection_makes_system_unrespons ive_(WAS:_Re:__Swazoo_2.2beta_show_impressive_pe rformance_for_large_file_uploading) > > As my previous messages said, with faster network connection attached, > the system become unresponsive even with single file upload(100Mbit/1000Mbit). > > I suspect that squeak cannot process this input stream faster enough or swazoo > cannot process. Even my laptop does not have faster disk drive it is not accessed > continuously so I don't think slow disk makes problem. > > How can I improve current situation, are there any parameter to be modified? -- Janko Mivšek AIDA/Web Smalltalk Web Application Server http://www.aidaweb.si

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Q: Is it all right for TTCfonts to have non-integer heights?
by Jerome Peace 28 Jul '08

28 Jul '08

Q: Is it all right for TTCfonts to have non-integer heights? Hi all, Several TTCfonts return float fractions when asked for heights (basically any with a point size not divisible by 3). You can see this by using the World>appearence>system fonts>demo mode and then ...>print default fonts. Is this a bug? Yours in curiosity and service, --Jerome Peace

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