June 2016 - Pharo-users - lists.pharo.org

Re: [Pharo-users] OSProcess command - non responding image when calling often

by Thierry Goubier

Hi Sabine, which version of Pharo are you using? I had similar issues, and I managed to reduce those occurrences to a reasonable level by changing the way I called OSProcess (and a lot of help from Dave). I do have sometime lockups with OSSubprocess as well, but those are also rare. (I do think this is a bug somewhere in the VM which makes it loose signals) The code I use is in GitFileTree: a low-level way of calling OSProcess which seems good at minimizing lockups. Thierry 2016-06-07 9:31 GMT+02:00 Sabine Manaa <manaa.sabine(a)gmail.com>: > Hi, > > sorry but I have another issue with OSProcess. > > For my app, I want to show small .png previews from my .pdfs. For this > reason, I use an external software, currently pdfbox. It works fine, but > regularly, I get a hanging image. I tried to reproduce it and found out, > that it is not a problem with pdfbox (http://pdfbox.apache.org) because > from command line, I can call it often without problems. There can be > (hopefully) many users in my app with many previews at one time. So I have > to call it often. > > For reproduction of the OSProcess issue, I used another simple command > (from > my other OSProcess umlaut issue :-)) to test it. > > calling this, results in a non responding image: > > 20 timesRepeat: [OSProcess command: ('cp > /Library/WebServer/Documents/reports/bar.pdf > /Library/WebServer/Documents/reports/test-c.pdf').]. > > also this: > 20 timesRepeat: [OSProcess command: ('echo "Hi there"').] > > My original code is similar to this but here only for information: > OSProcess > command: > ('{1} -jar {2} PDFToImage -format PNG -page 1 -dpi > 100 {3}' > format: > {'Library/Internet\ > Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java'. > > '/Users/sabine/Desktop/pdfbox-app-2.0.1.jar'. > > > '/Library/WebServer/Documents/reports/201411121510-112859865-3378921/20150605_170_IFA_Berlin_Reisekostenabrechnung.pdf'}). > > > So, my question is: is it wrong, calling OSProcess like this? How to do it > instead? > > I am sorry to ask again and hope that there is a simple solution. > Or is it a bug in OSProcess? > > Regards > Sabine > > > > > -- > View this message in context: > http://forum.world.st/OSProcess-command-non-responding-image-when-calling-o… > Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. > >

June 7, 2016

OSProcess command - non responding image when calling often

by Sabine Manaa

Hi, sorry but I have another issue with OSProcess. For my app, I want to show small .png previews from my .pdfs. For this reason, I use an external software, currently pdfbox. It works fine, but regularly, I get a hanging image. I tried to reproduce it and found out, that it is not a problem with pdfbox (http://pdfbox.apache.org) because from command line, I can call it often without problems. There can be (hopefully) many users in my app with many previews at one time. So I have to call it often. For reproduction of the OSProcess issue, I used another simple command (from my other OSProcess umlaut issue :-)) to test it. calling this, results in a non responding image: 20 timesRepeat: [OSProcess command: ('cp /Library/WebServer/Documents/reports/bar.pdf /Library/WebServer/Documents/reports/test-c.pdf').]. also this: 20 timesRepeat: [OSProcess command: ('echo "Hi there"').] My original code is similar to this but here only for information: OSProcess command: ('{1} -jar {2} PDFToImage -format PNG -page 1 -dpi 100 {3}' format: {'Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java'. '/Users/sabine/Desktop/pdfbox-app-2.0.1.jar'. '/Library/WebServer/Documents/reports/201411121510-112859865-3378921/20150605_170_IFA_Berlin_Reisekostenabrechnung.pdf'}). So, my question is: is it wrong, calling OSProcess like this? How to do it instead? I am sorry to ask again and hope that there is a simple solution. Or is it a bug in OSProcess? Regards Sabine -- View this message in context: http://forum.world.st/OSProcess-command-non-responding-image-when-calling-o… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

June 7, 2016

Re: [Pharo-users] Spur Cog vs VW

by ClÃ©ment Bera

We measured Spur vs pre-Spur, but I am not sure we can measure VW without Cincom's approval. On Tue, Jun 7, 2016 at 7:56 AM, Gerry Weaver <gerryw(a)compvia.com> wrote: > Hi, > > I was reading about the VM stuff and assumed (wrongly) that the post > applied to that. Sorry for the noise. > > Thanks, > -G > > > -----Original Message----- > From: Pharo-users [mailto:pharo-users-bounces@lists.pharo.org] On Behalf > Of stepharo > Sent: Tuesday, June 7, 2016 12:48 AM > To: Any question about pharo is welcome <pharo-users(a)lists.pharo.org> > Subject: Re: [Pharo-users] Spur Cog vs VW > > Not that one :) > > https://www.youtube.com/watch?v=7spEW4NLbH8 > > Stef > > > >

June 7, 2016

Re: [Pharo-users] synchronized return from asynchronous message block

by Nicolai Hess

2016-06-07 8:21 GMT+02:00 Peter Uhnak <i.uhnak(a)gmail.com>: > Hi, > > is it possible to return "synchronously" even if I have an asynchronous > message? > > For example: > > SomeObject>>someMethod > ^ UIManager default chooseFrom: #(a b c) > > When the above method is executed, it will open a popup and block the > execution until I select something, then it will return the selection. > > But if I instead have something like this > > SomeObject>>otherMethod > |choice| > NewListModel new > items: #(a b c); > whenSelectedItemChanged: [ :item | choice := item ]; > openDialogWithSpec. > choice. > > Then it will open the window but it will immediately return nil. > With a spec window, you can try to open it modal WindowModel>>#modalRelativeTo: aWindow > So my question is: is it possible to synchronously return even in the > second example / block the flow until a selection is made? > > Thanks, > Peter > >

June 7, 2016

synchronized return from asynchronous message block

by Peter Uhnak

Hi, is it possible to return "synchronously" even if I have an asynchronous message? For example: SomeObject>>someMethod ^ UIManager default chooseFrom: #(a b c) When the above method is executed, it will open a popup and block the execution until I select something, then it will return the selection. But if I instead have something like this SomeObject>>otherMethod |choice| NewListModel new items: #(a b c); whenSelectedItemChanged: [ :item | choice := item ]; openDialogWithSpec. choice. Then it will open the window but it will immediately return nil. So my question is: is it possible to synchronously return even in the second example / block the flow until a selection is made? Thanks, Peter

June 7, 2016

Re: [Pharo-users] Spur Cog vs VW

by Gerry Weaver

Hi, I was reading about the VM stuff and assumed (wrongly) that the post applied to that. Sorry for the noise. Thanks, -G -----Original Message----- From: Pharo-users [mailto:pharo-users-bounces@lists.pharo.org] On Behalf Of stepharo Sent: Tuesday, June 7, 2016 12:48 AM To: Any question about pharo is welcome <pharo-users(a)lists.pharo.org> Subject: Re: [Pharo-users] Spur Cog vs VW Not that one :) https://www.youtube.com/watch?v=7spEW4NLbH8 Stef

June 7, 2016

Re: [Pharo-users] Spur Cog vs VW

by stepharo

Not that one :) https://www.youtube.com/watch?v=7spEW4NLbH8 Stef

June 7, 2016

Re: [Pharo-users] OSProcess command with german umlaut does not work

by David T. Lewis

On Mon, Jun 06, 2016 at 08:34:40PM +0200, Sven Van Caekenberghe wrote: > > > On 06 Jun 2016, at 17:22, Sabine Manaa <manaa.sabine(a)gmail.com> wrote: > > > > why ByteArray? > > http://www.unicode.org/faq/utf_bom.html > > A Unicode transformation format (UTF) is an algorithmic mapping from every Unicode code point (except surrogate code points) to a unique byte sequence. > > https://en.wikipedia.org/wiki/UTF-8 > > UTF-8 encodes each of the 1,112,064 valid code points in the Unicode code space (1,114,112 code points minus 2,048 surrogate code points) using one to four 8-bit bytes (a group of 8 bits is known as an octet in the Unicode Standard). > > In Pharo > > https://ci.inria.fr/pharo-contribution/job/EnterprisePharoBook/lastSuccessf… > > Of course, given a ByteArray, whose values are all between 0 and 255 by definition, you can convert it to a ByteString. That String is not a correct (Pharo) String anymore, it is like converting a PNG or JPEG to String, you can do it, it is just wrong. > > When talking to the outside world, be it over a network connection, or via primitive calls, anything but pure ASCII strings need an encoding. This has to be agreed upon by both parties. If the receiving party wants UTF-8 forced into a (kind of) String, that is (still) possible. > > Your initial solution seems to indicate that this is expected. This (ugly) conversion should be done at an as low level as possible, IMHO. > Hi Sven, Thanks for this concise summary. I think perhaps what is conceptually a problem in my OSProcess implementation is that I allow command arguments to be given in the form of Strings, then pass the byte array contents of those Squeak/Pharo Strings to a Unix shell or to an exec() system call. This is convenient from my point of view, because strings are very easy to use, but it does not account for the differences in mapping from a String to a byte array. It is the byte array that is actually used in the calls to the operating system such as: UnixOSProcessAccessor>>primForkExec: executableFile stdIn: inputFileHandle stdOut: outputFileHandle stdErr: errorFileHandle argBuf: argVec argOffsets: argOffsets envBuf: envVec envOffsets: envOffsets workingDir: pathString At this point, the argVec is composed of "strings" in the C sense of the word, which really means that it contains byte array data from the Strings. And of course, if the string encodings in the Squeak/Pharo strings do not happen to match the string encodings of the operating system, then indeed the byte arrays do not match and we get a "file not found" kind of problem. My hope is that Mariano's assessment is correct, and that we can treat this as the right way to handle the encoding match issues: On Mon, Jun 06, 2016 at 01:59:21PM -0300, Mariano Martinez Peck wrote: > Hi Dave, Sabine, Norbert et all, > > Few weeks (months?) ago I was also reviewing this topic of encoding a > OS(Sub)Process. After surfing a bit the web, I found out the most simple > and accurate answer/solution was indeed to set the correct locale and/or > text encoding in the computer in question. Anyway...more answers below. This certainly sounds like the Right Thing To Do if only it works :-) Dave

June 7, 2016

Re: [Pharo-users] GUI Applications

by Ben Coman

For general UI, use Spec. For browser** based UI, check Glamour. **Meaning like Pharo System Browser, not a web browser. Not sure if there another term that could avoid any confusion? cheers -ben On Tue, Jun 7, 2016 at 3:59 AM, sergio ruiz <sergio.rrd(a)gmail.com> wrote: > is there one GUI framework that is being used more than the others, or that is more mature? > > Thanks! > > >> On Jun 6, 2016, at 3:51 PM, Alexandre Bergel <alexandre.bergel(a)me.com> wrote: >> >> You are very right. Pharo offers several GUI framework, including Spec, Glamour. >> Check for Deep Into Pharo, a book which talk about theses. >> > > ---- > peace, > sergio > photographer, journalist, visionary > #BitMessage BM-NBaswViL21xqgg9STRJjaJaUoyiNe2dV > http://www.Village-Buzz.com > http://www.ThoseOptimizeGuys.com > http://www.coffee-black.com > http://www.painlessfrugality.com > http://www.twitter.com/sergio_101 > http://www.facebook.com/sergio101 >

June 7, 2016

Re: [Pharo-users] GUI Applications

by sergio ruiz

Great! Thanks! I will take a look at this.. > On Jun 6, 2016, at 4:12 PM, Johan Fabry <jfabry(a)dcc.uchile.cl> wrote: > > the standard way to build UIs in Pharo is by using Spec. There is a video of me presenting it at the Pharo Days 2015 that gives you a first overview https://www.youtube.com/watch?v=OL23s9ZUIR0&feature=youtu.be&list=PL4actYd6… ---- peace, sergio photographer, journalist, visionary #BitMessage BM-NBaswViL21xqgg9STRJjaJaUoyiNe2dV http://www.Village-Buzz.com http://www.ThoseOptimizeGuys.com http://www.coffee-black.com http://www.painlessfrugality.com http://www.twitter.com/sergio_101 http://www.facebook.com/sergio101

June 6, 2016