September 2013 - Pharo-users

NeoJSON mapping

by Norbert Hartl

Is it possible to make a mapping for NeoJSON that an object shape maps to a different shape. I mean if it is possible to have a class with instVars: Foo +name +x +y that maps to { 'name' ; â¦, 'point' : { x : â¦, y : â¦. } } thanks, Norbert

Sept. 25, 2013

Re: [Pharo-users] Image taking up 100% CPU

by Bernat Romagosa

I've just realised my image weighs 301Mb! 2013/9/25 Bernat Romagosa <tibabenfortlapalanca(a)gmail.com> > It's a Pharo 1.4 image on this VM: > > 'CoInterpreter VMMaker-oscog-EstebanLorenzano.161 uuid: > 8e0c22c3-b48d-4d8d-a7f9-8a75dc246f28 Jul 18 2012, > StackToRegisterMappingCogit VMMaker-oscog-EstebanLorenzano.161 uuid: > 8e0c22c3-b48d-4d8d-a7f9-8a75dc246f28 Jul 18 2012, > https://git.gitorious.org/cogvm/blessed.git Commit: > 5151310c41b08f55b70e9c6250711cb1f3672ce7 Date: 2012-07-18 14:06:15 +0200 > By: Camillo Bruni <camillobruni(a)gmail.com>' > > (On a Debian VPS) > > > 2013/9/25 Paul DeBruicker <pdebruic(a)gmail.com> > >> Which image and vm ? >> >> >> >> On Sep 25, 2013, at 3:24 AM, Bernat Romagosa < >> tibabenfortlapalanca(a)gmail.com> wrote: >> >> Hmmm something weird just happened. I restarted Komanche, then when I >> saved the image and the CPU rushed to 100%! >> >> >> 2013/9/25 Janko MivÅ¡ek <janko.mivsek(a)eranova.si> >> >>> Hi Bernat, >>> >>> I remember once having similar problems on Swazoo. But on image restart. >>> If Swazoo was not stopped before image shutdown, image went into 100% >>> CPU after restart. Something like that. It seems therefore that this is >>> sockets related problem >>> >>> What if you stop your web server and start again? >>> >>> Best regards >>> Janko >>> >>> Dne 25. 09. 2013 10:03, piÅ¡e Bernat Romagosa: >>> > Forgot to answer that I'm not using RFB. I had sooo many problems with >>> > it that since last year I've been using xpra <http://xpra.org/> >>> instead, >>> > which lets you capture running X windows remotely over SSH. It's kind >>> of >>> > like screen (not even remotely so powerful) but for GUIs. >>> > >>> > Cheers, >>> > Bernat. >>> > >>> > >>> > 2013/9/25 Bernat Romagosa <tibabenfortlapalanca(a)gmail.com >>> > <mailto:tibabenfortlapalanca@gmail.com>> >>> > >>> > Not really, the image is not being saved regularly... all data is >>> > stored in a neo4j database, so there's no need to save the image. >>> > >>> > It seems like it may have something to do with users uploading >>> files >>> > in some particular moments, but I'm using GÃ¶ran's file upload >>> > mechanism, in which files are streamed straight to disk, so there >>> > shouldn't be any image clogging problems even for huge files... >>> > >>> > 2013/9/24 Mariano Martinez Peck <marianopeck(a)gmail.com >>> > <mailto:marianopeck@gmail.com>> >>> > >>> > Bernat, could this be triggered when you SAVE the image? If >>> > true, do you happen to have RFB running? >>> > >>> > >>> > On Tue, Sep 24, 2013 at 4:45 AM, Bernat Romagosa >>> > <tibabenfortlapalanca(a)gmail.com >>> > <mailto:tibabenfortlapalanca@gmail.com>> wrote: >>> > >>> > Hi list, >>> > >>> > A couple months ago I deployed an Iliad application in a >>> > Debian VPS, which has been working great except for the >>> fact >>> > that about every two weeks the image takes up 100% of the >>> > CPU and, of course, the app becomes unusable. >>> > >>> > Does anyone have a method for finding out what's going on? >>> > I've been trying to debug the problem, but as I don't know >>> > what triggers it, it's pretty impossible to detect... >>> > >>> > I've checked the running threads and nothing seems unusual. >>> > I've also profiled the app for a whole day of real usage >>> > with end users and not a single method took more time than >>> > what I expected, so I'm completely lost here. >>> > >>> > Any help will be appreciated! :) >>> >>> >>> -- >>> Janko MivÅ¡ek >>> Aida/Web >>> Smalltalk Web Application Server >>> http://www.aidaweb.si >>> >>> >> >> >> -- >> Bernat Romagosa. >> >> > > > -- > Bernat Romagosa. > -- Bernat Romagosa.

Sept. 25, 2013

Re: [Pharo-users] Image taking up 100% CPU

by Bernat Romagosa

It's a Pharo 1.4 image on this VM: 'CoInterpreter VMMaker-oscog-EstebanLorenzano.161 uuid: 8e0c22c3-b48d-4d8d-a7f9-8a75dc246f28 Jul 18 2012, StackToRegisterMappingCogit VMMaker-oscog-EstebanLorenzano.161 uuid: 8e0c22c3-b48d-4d8d-a7f9-8a75dc246f28 Jul 18 2012, https://git.gitorious.org/cogvm/blessed.git Commit: 5151310c41b08f55b70e9c6250711cb1f3672ce7 Date: 2012-07-18 14:06:15 +0200 By: Camillo Bruni <camillobruni(a)gmail.com>' (On a Debian VPS) 2013/9/25 Paul DeBruicker <pdebruic(a)gmail.com> > Which image and vm ? > > > > On Sep 25, 2013, at 3:24 AM, Bernat Romagosa < > tibabenfortlapalanca(a)gmail.com> wrote: > > Hmmm something weird just happened. I restarted Komanche, then when I > saved the image and the CPU rushed to 100%! > > > 2013/9/25 Janko MivÅ¡ek <janko.mivsek(a)eranova.si> > >> Hi Bernat, >> >> I remember once having similar problems on Swazoo. But on image restart. >> If Swazoo was not stopped before image shutdown, image went into 100% >> CPU after restart. Something like that. It seems therefore that this is >> sockets related problem >> >> What if you stop your web server and start again? >> >> Best regards >> Janko >> >> Dne 25. 09. 2013 10:03, piÅ¡e Bernat Romagosa: >> > Forgot to answer that I'm not using RFB. I had sooo many problems with >> > it that since last year I've been using xpra <http://xpra.org/> >> instead, >> > which lets you capture running X windows remotely over SSH. It's kind of >> > like screen (not even remotely so powerful) but for GUIs. >> > >> > Cheers, >> > Bernat. >> > >> > >> > 2013/9/25 Bernat Romagosa <tibabenfortlapalanca(a)gmail.com >> > <mailto:tibabenfortlapalanca@gmail.com>> >> > >> > Not really, the image is not being saved regularly... all data is >> > stored in a neo4j database, so there's no need to save the image. >> > >> > It seems like it may have something to do with users uploading files >> > in some particular moments, but I'm using GÃ¶ran's file upload >> > mechanism, in which files are streamed straight to disk, so there >> > shouldn't be any image clogging problems even for huge files... >> > >> > 2013/9/24 Mariano Martinez Peck <marianopeck(a)gmail.com >> > <mailto:marianopeck@gmail.com>> >> > >> > Bernat, could this be triggered when you SAVE the image? If >> > true, do you happen to have RFB running? >> > >> > >> > On Tue, Sep 24, 2013 at 4:45 AM, Bernat Romagosa >> > <tibabenfortlapalanca(a)gmail.com >> > <mailto:tibabenfortlapalanca@gmail.com>> wrote: >> > >> > Hi list, >> > >> > A couple months ago I deployed an Iliad application in a >> > Debian VPS, which has been working great except for the fact >> > that about every two weeks the image takes up 100% of the >> > CPU and, of course, the app becomes unusable. >> > >> > Does anyone have a method for finding out what's going on? >> > I've been trying to debug the problem, but as I don't know >> > what triggers it, it's pretty impossible to detect... >> > >> > I've checked the running threads and nothing seems unusual. >> > I've also profiled the app for a whole day of real usage >> > with end users and not a single method took more time than >> > what I expected, so I'm completely lost here. >> > >> > Any help will be appreciated! :) >> >> >> -- >> Janko MivÅ¡ek >> Aida/Web >> Smalltalk Web Application Server >> http://www.aidaweb.si >> >> > > > -- > Bernat Romagosa. > > -- Bernat Romagosa.

Sept. 25, 2013

Re: [Pharo-users] How to load seaside currently?

by StÃ©phane Ducasse

On Sep 25, 2013, at 3:10 PM, Stephan Eggermont <stephan(a)stack.nl> wrote: > Hi Stef, > > I'm able to reproduce your problems, by not cleaning the packagecache. > The new version of Grease-Pharo20-Core is pmm.1. Having a packagecache > that contains versions that seem to be newer creates loading of wrong versions. > In my case, it tried loading Grease-Pharo20-Core-pmm.17.mcz. > > Sharing a packagecache between stable and development branches currently > seems to be a bad idea. I will try to reload in a fresh setup and see. > > Cheers, > Diego & Stephan

Sept. 25, 2013

Re: [Pharo-users] Semantic web packages

by Jesus NuÃ±ez

I'll try to elaborate but what I can say is only from my limited perspective. You can take it as an incomplete argument that needs much refinement, but could however serve as a seed for an upcoming idea. Search: After all we can see the entire web as a large graph which we seek to traverse, looking for information. First-order logic is the most neutral and natural way of representing the web. With facts and rules that convolve to derive new conclusions, logic is perhaps the most compact way of representing pretty much any kind of relationships. Think of a model for a situation that would accept a query as below with some facts and rules governing the dynamics of the underlying world: *"Give me all restaurants in the city where someone whose name is Laura has been a client at least once per month during the last 3 months and whose has always paid with credit card"* My opinions are based on the power of tools in Pharo, such as the moose family for data visualization and related stuff and of course Seaside, together with Prolog first order logic syntax, unification, backtracking capabilities, and search based on a sound resolution method. In the case of the use of Prolog for the semantic web, see for instance http://attempto.ifi.uzh.ch/site <http://attempto.ifi.uzh.ch/site/docs/>. Prolog counts also with mature semantic web packages http://www.swi-prolog.org/web/ that handles the semantic web RDF model naturally. For instance have a look at http://www.semanticweb.gr/topos/. In this very application you may also discover how Pharo can naturally fit in a similar application. In a personal attempt (indeed it is part of my master thesis); since I am in Pharo 1.4, I wanted to emulate the helvetia language boxes, to create rules in Pharo and interact with Prolog as in the example below for a SQL language box, rows := *SELECT * FROM users WHERE username = @(aString ~= /\s*(\w+)\s*/)* I created a parser in PetitParser for Prolog, however It was too much work to create something as the above from scratch (also somewhat involved is to handle operator declaration in Prolog) and finally I end up with a tool for imposing only queries to Prolog and retrive the results in a JSON dictionary using SocketStream for RPC handling and NeoJSONReader to read the JSON contents from the stream. Just for reference, it looks as follows, Transcript open. stream := SocketStream openConnectionToHostNamed: 'localhost' port: 31415. [ text:='{"method":"query", "params": ["owns_Zebra(O,X)"], "id":0}'. stream nextPutAll:text; flush. Transcript cr; show:(stream upToEnd). ] ensure: [ stream close ] map := (NeoJSONReader on: (result contents) readStream ) next. Again, it is only my limited view, and I am only starting to understand the fundamentals of semantic web but I think it is not a bad idea to create a productive conjunction of this two wonderful worlds. So please don't blame on me if I am wrong in all of my thoughs, Cheers, Jesus 2013/9/25 Norbert Hartl <norbert(a)hartl.name> > > Am 25.09.2013 um 13:02 schrieb Jesus NuÃ±ez <poissonbreaker(a)gmail.com>: > > What did happen to Helvetia? Sorry if I am an ignorant here but I think > language boxes in Pharo; to interac, remarkably with Prolog, would be > definitely a plus for semantic web development in Smalltalk. > > Cheers > > Sounds interesting. Can you elaborate on that? How could all of those > mentioned support the semantic web? [1] > > Norbert > > [1] http://en.wikipedia.org/wiki/Semantic_Web > > > > > 2013/9/25 Norbert Hartl <norbert(a)hartl.name> > >> Looking for semantic web tools I found >> >> http://www.squeaksource.com/TripleStore/ >> >> Are there other resources for the semantic web in pharo? smalltalk? >> >> Norbert >> > > >

Sept. 25, 2013

Re: [Pharo-users] Image taking up 100% CPU

by Paul DeBruicker

Which image and vm ? On Sep 25, 2013, at 3:24 AM, Bernat Romagosa <tibabenfortlapalanca(a)gmail.com> wrote: > Hmmm something weird just happened. I restarted Komanche, then when I saved the image and the CPU rushed to 100%! > > > 2013/9/25 Janko MivÅ¡ek <janko.mivsek(a)eranova.si> > Hi Bernat, > > I remember once having similar problems on Swazoo. But on image restart. > If Swazoo was not stopped before image shutdown, image went into 100% > CPU after restart. Something like that. It seems therefore that this is > sockets related problem > > What if you stop your web server and start again? > > Best regards > Janko > > Dne 25. 09. 2013 10:03, piÅ¡e Bernat Romagosa: > > Forgot to answer that I'm not using RFB. I had sooo many problems with > > it that since last year I've been using xpra <http://xpra.org/> instead, > > which lets you capture running X windows remotely over SSH. It's kind of > > like screen (not even remotely so powerful) but for GUIs. > > > > Cheers, > > Bernat. > > > > > > 2013/9/25 Bernat Romagosa <tibabenfortlapalanca(a)gmail.com > > <mailto:tibabenfortlapalanca@gmail.com>> > > > > Not really, the image is not being saved regularly... all data is > > stored in a neo4j database, so there's no need to save the image. > > > > It seems like it may have something to do with users uploading files > > in some particular moments, but I'm using GÃ¶ran's file upload > > mechanism, in which files are streamed straight to disk, so there > > shouldn't be any image clogging problems even for huge files... > > > > 2013/9/24 Mariano Martinez Peck <marianopeck(a)gmail.com > > <mailto:marianopeck@gmail.com>> > > > > Bernat, could this be triggered when you SAVE the image? If > > true, do you happen to have RFB running? > > > > > > On Tue, Sep 24, 2013 at 4:45 AM, Bernat Romagosa > > <tibabenfortlapalanca(a)gmail.com > > <mailto:tibabenfortlapalanca@gmail.com>> wrote: > > > > Hi list, > > > > A couple months ago I deployed an Iliad application in a > > Debian VPS, which has been working great except for the fact > > that about every two weeks the image takes up 100% of the > > CPU and, of course, the app becomes unusable. > > > > Does anyone have a method for finding out what's going on? > > I've been trying to debug the problem, but as I don't know > > what triggers it, it's pretty impossible to detect... > > > > I've checked the running threads and nothing seems unusual. > > I've also profiled the app for a whole day of real usage > > with end users and not a single method took more time than > > what I expected, so I'm completely lost here. > > > > Any help will be appreciated! :) > > > -- > Janko MivÅ¡ek > Aida/Web > Smalltalk Web Application Server > http://www.aidaweb.si > > > > > -- > Bernat Romagosa.

Sept. 25, 2013

How to load seaside currently?

by Stephan Eggermont

Hi Stef, I'm able to reproduce your problems, by not cleaning the packagecache. The new version of Grease-Pharo20-Core is pmm.1. Having a packagecache that contains versions that seem to be newer creates loading of wrong versions. In my case, it tried loading Grease-Pharo20-Core-pmm.17.mcz. Sharing a packagecache between stable and development branches currently seems to be a bad idea. Cheers, Diego & Stephan

Sept. 25, 2013

Re: [Pharo-users] Semantic web packages

by Norbert Hartl

Am 25.09.2013 um 13:02 schrieb Jesus NuÃ±ez <poissonbreaker(a)gmail.com>: > What did happen to Helvetia? Sorry if I am an ignorant here but I think language boxes in Pharo; to interac, remarkably with Prolog, would be definitely a plus for semantic web development in Smalltalk. > > Cheers > Sounds interesting. Can you elaborate on that? How could all of those mentioned support the semantic web? [1] Norbert [1] http://en.wikipedia.org/wiki/Semantic_Web > > > > 2013/9/25 Norbert Hartl <norbert(a)hartl.name> > Looking for semantic web tools I found > > http://www.squeaksource.com/TripleStore/ > > Are there other resources for the semantic web in pharo? smalltalk? > > Norbert >

Sept. 25, 2013

Re: [Pharo-users] Semantic web packages

by Jesus NuÃ±ez

What did happen to Helvetia? Sorry if I am an ignorant here but I think language boxes in Pharo; to interac, remarkably with Prolog, would be definitely a plus for semantic web development in Smalltalk. Cheers 2013/9/25 Norbert Hartl <norbert(a)hartl.name> > Looking for semantic web tools I found > > http://www.squeaksource.com/TripleStore/ > > Are there other resources for the semantic web in pharo? smalltalk? > > Norbert >

Sept. 25, 2013

Re: [Pharo-users] Morph relative positions

by Norbert Hartl

Am 20.09.2013 um 12:24 schrieb Igor Stasenko <siguctua(a)gmail.com>: > > > > On 20 September 2013 12:15, Norbert Hartl <norbert(a)hartl.name> wrote: > Next try. I may do something stupid but it appears that all morphs draw on the same coordinate system. Meaning that every Morph that will draw something at 0@0 will put it in the top left corner of the image displayed. I would expect that a morph that is positioned somewhere provides a canvas where 0@0 is relative to the position of the morph. If coordinates are absoulte how can I delegate work to sub components and having them calculate the offsets properly? > > Welcome to club. > > To ease the pain, take a look at TransformMorph. > Thanks. I'm trying to understand TransformMorph but I don't really get it. I cannot see _how_ it is transforming stuff. For testing I have three morphs MasterMorph TransformMorph TestMorph In TransformMorph I use MorphicTransform offset: 0 angle: 0 scale: 10.0. When I implement #drawOn: in TestMorph and do aCanvas fillRectangle: (Rectangle origin: 10@10 extent: 10@10) color: Color red. the result looks good although I don't understand where the coordinates are translated. To me it appears that the way it goes is from Canvas to GrafPort and I didn't find the location where TransformMorph comes into play. I'm trying to figure that out because I cannot use Float coordinates in my transform morph. Doing in TestMorph>>#drawOn something like aCanvas fillRectangle: (Rectangle origin: 0.9(a)0.9 extent: 1@1) color: Color green. I get two problems. Basically the Rectangle is truncated to Ints before the transform. Additionally in this particular case the rectangle is not displayed at all. For 0.89@.089 I can see it truncated at origin 0@0 but at 0.9(a)0.9 it just disappears. Same goes for 0.63 and other values. And I don't know how to debug morphic because using breakpoints is too dangerous while it is in stepping mode. thanks, Norbert

Sept. 25, 2013