August 2012 - Pharo-dev - lists.pharo.org

[Pharo-project] Reef examples and documentation

by Oscar E A Callau

Hi all, Do You known where I can find examples and documentation about Reef?. It seems to be quite powerful. I just found the slides and videos from esug 2010 and 2011. Cheers Ãscar E A Callau

Aug. 26, 2012

Re: [Pharo-project] serializing DynamicVariables (Zinc so far)

by Frank Shearar

On 26 August 2012 17:55, Levente Uzonyi <leves(a)elte.hu> wrote: > On Sun, 26 Aug 2012, Frank Shearar wrote: > >> That sounds like a reasonable workaround to address Mariano's >> immediate problem :) > > > I don't see what other issues are there to solve. :) Then you should go reread my article, and the articles it references :) Both have examples of how undelimited dynamic variables don't work sensibly with delimited continuations. Kiselyov goes further and shows how they _cannot_ work sensibly. Serialising a running process implicitly creates a delimited continuation. Ergo, Fun Times! frank > Anyway, here's a highly > untested example of what I had in my mind: > http://leves.web.elte.hu/squeak/StackSerializableDynamicVariable.st Yep, using resumable exceptions to implement delimited dynamic variables. That's exactly what Control does, only without DynamicVariable necessarily polluting the global namespace. > Is uses a method in Process which is not present in current images: > > environmentAt: key ifAbsentPut: aBlock > > ^(env ifNil: [ env := Dictionary new ]) at: key ifAbsentPut: aBlock. Current _Pharo_ images, maybe. I'm pretty sure I looked at a trunk image with it in the last few hours (but obviously am too lazy to actually go check :/) frank > Levente >

Aug. 26, 2012

Re: [Pharo-project] serializing DynamicVariables (Zinc so far)

by Levente Uzonyi

On Sun, 26 Aug 2012, Frank Shearar wrote: > That sounds like a reasonable workaround to address Mariano's > immediate problem :) I don't see what other issues are there to solve. :) Anyway, here's a highly untested example of what I had in my mind: http://leves.web.elte.hu/squeak/StackSerializableDynamicVariable.st Is uses a method in Process which is not present in current images: environmentAt: key ifAbsentPut: aBlock ^(env ifNil: [ env := Dictionary new ]) at: key ifAbsentPut: aBlock. Levente

Aug. 26, 2012

Re: [Pharo-project] [update 2.0] #20269

by Esteban Lorenzano

btw... this last change finish first step to getting rid off PackageInfo (replacing it with RPackage)... your browser will looks weird, but with some time this will be cool... just be patient :) Esteban On Aug 26, 2012, at 4:21 PM, Esteban Lorenzano <estebanlm(a)gmail.com> wrote: > 20269 > ----- > > Issue 6575: Import RPackage from MC packages with tags > http://code.google.com/p/pharo/issues/detail?id=6575 > > Issue 6578: Make Monticello work with new repackaging announcements > http://code.google.com/p/pharo/issues/detail?id=6578

Aug. 26, 2012

Re: [Pharo-project] serializing DynamicVariables (Zinc so far)

by Frank Shearar

On 25 August 2012 20:19, StÃ©phane Ducasse <stephane.ducasse(a)inria.fr> wrote: > frank would you be interested to write a chapter on dynamicVariable and delimited one? > Because it would be really good to be able to read that. I would, but I'll only have time for it next month or later. I need to write decent documentation for the library anyway, so I could always solve both issues in one go. frank > On Aug 25, 2012, at 12:50 PM, Frank Shearar wrote: > >> On 25 August 2012 09:31, Mariano Martinez Peck <marianopeck(a)gmail.com> wrote: >>> Hi Sean. I am still seing the problem :( >>> It is difficult to make it YOU to reproduce it, but it is easy that tomorrow >>> I show it to you :) >>> Basically, what is happening is that >>> >>> ZnClient >> executeRequestResponse >>> self logRequest. >>> ZnSignalProgress enabled ifTrue: [ HTTPProgress signal: 'Writing request' ]. >>> request writeOn: connection. >>> connection flush. >>> ZnSignalProgress enabled ifTrue: [ HTTPProgress signal: 'Reading response' >>> ]. >>> response := request method = #HEAD >>> ifTrue: [ ZnResponse readHeaderFrom: connection ] >>> ifFalse: [ >>> self streaming >>> ifTrue: [ ZnResponse readStreamingFrom: connection ] >>> ifFalse: [ ZnResponse readFrom: connection ] ]. >>> self logResponse >>> >>> throws a mustBeBoolean in the first line "ZnSignalProgress enabled ". It >>> seems that such expression answered the SmallINteger 30 the first time. >>> If I take the debugger and I evaluate ZnSignalProgress enabled again, it >>> answers me false, which is the correct value. >>> Ahh yes, this in latest 2.0. >> >> I would have expected a ZnSignalProgress class >> default saying "^ >> true" (or something else of a Boolean nature). DynamicVariables have a >> default value of nil unless otherwise set. Or, since you're getting a >> value of 30, something somewhere is saying ZnSignalProgress value: 30 >> during: ["something"]... which would be very weird. >> >> frank >> >>> Thanks! >>> >>> >>> On Fri, Aug 17, 2012 at 10:32 PM, Mariano Martinez Peck >>> <marianopeck(a)gmail.com> wrote: >>>> >>>> Hi Frank and Sean. The problem was quite hard to reproduce. You need to >>>> rebuild a Pharo image from a kernel using Tanker ;) >>>> Anyway, since we are changing completely Tanker now it may have been >>>> solved. I did a quick test (of a similar case) and it works. So once I have >>>> the example of the kernel again I will trying again. >>>> Thanks for offering the help! >>>> >>>> >>>> On Fri, Aug 17, 2012 at 2:33 PM, Sean P. DeNigris <sean(a)clipperadams.com> >>>> wrote: >>>>> >>>>> >>>>> Mariano Martinez Peck wrote >>>>>> >>>>>> The first time, #enable answers something wrong. The second time it is >>>>>> called, it seems to answer the correct value. >>>>> >>>>> Mariano, would you give some more details about the wrong value, the >>>>> expected value, and the steps to reproduce? I took a look but I'm not >>>>> seeing >>>>> what the problem is... b.t.w. is this a 1.4 or 2.0 image? >>>>> >>>>> Sean >>>>> >>>>> >>>>> >>>>> -- >>>>> View this message in context: >>>>> http://forum.world.st/serializing-DynamicVariables-Zinc-so-far-tp4643514p46… >>>>> Sent from the Pharo Smalltalk mailing list archive at Nabble.com. >>>>> >>>> >>>> >>>> >>>> -- >>>> Mariano >>>> http://marianopeck.wordpress.com >>>> >>> >>> >>> >>> -- >>> Mariano >>> http://marianopeck.wordpress.com >>> >> > >

Aug. 26, 2012

[Pharo-project] [update 2.0] #20269

by Esteban Lorenzano

20269 ----- Issue 6575: Import RPackage from MC packages with tags http://code.google.com/p/pharo/issues/detail?id=6575 Issue 6578: Make Monticello work with new repackaging announcements http://code.google.com/p/pharo/issues/detail?id=6578

Aug. 26, 2012

[Pharo-project] [update 2.0] #20268

by Esteban Lorenzano

20268 ----- Issue 6599: we have methods with trailer EmbeddedSourceZip http://code.google.com/p/pharo/issues/detail?id=6599 Issue 6597: Fix MonticelloMocks mess http://code.google.com/p/pharo/issues/detail?id=6597

Aug. 26, 2012

Re: [Pharo-project] RGMethodDefininition

by Veronica Isabel Uquillas Gomez

I agree that it is important... But i meant that the name it is not clear and not consistent with the API of Ring. Such behavior such be added indeed. On 26 Aug 2012, at 00:19, Camillo Bruni wrote: > On 2012-08-25, at 21:18, StÃ©phane Ducasse <stephane.ducasse(a)inria.fr> wrote: >> origin is the place (trait) where the method is originally defined. so this is important. > > > exactly, I'm just wondering if you need another variable. > Cause you have > - parent (which I assume is the class the method is installed id) > - package (currently used to model extensions/normal methods) > > I think just having origin would solve this no? (most probably I forgot something :P) > Basically you need to know two things of a method, where it is installed and > where it came from. > > The installed place is given in Ring with parent, the place the method comes from > however is not always correctly given... > >

Aug. 26, 2012

Re: [Pharo-project] serializing DynamicVariables (Zinc so far)

by Frank Shearar

On 25 August 2012 22:34, Levente Uzonyi <leves(a)elte.hu> wrote: > On Sat, 25 Aug 2012, Frank Shearar wrote: > >> On 25 August 2012 14:30, Levente Uzonyi <leves(a)elte.hu> wrote: >>> >>> On Sat, 25 Aug 2012, Sven Van Caekenberghe wrote: >>> >>>> The nil default is used as a 'not set' third value. >>>> >>>> ZnSignalProgress class>>#enabled >>>> "Answer if HTTPProgress should be signalled. >>>> The default is false." >>>> >>>> ^ self value >>>> ifNil: [ false ] >>>> ifNotNil: [ :value | value ] >>>> >>>> ZnClient>>#withProgressDo: block >>>> ^ ZnSignalProgress value >>>> ifNil: [ >>>> ZnSignalProgress >>>> value: self signalProgress >>>> during: [ ^ block value ] ] >>>> ifNotNil: [ >>>> block value ] >>> >>> >>> >>> DynamicVariables are stored in the env variable of Process, the stack >>> doesn't store this information, so if you're about to serialize a state >>> of a >>> Process, then you have to serialize the env variable too, otherwise >>> you'll >>> lose information. >> >> >> I'm sure that's what I said in my initial response to Mariano's >> question :) Yes, indeed, that is precisely the problem with >> DynamicVariable. (Scala's and Clojure's dynamic variables suffer the >> same problem.) That's why these guys don't play well with stack >> slicing & dicing >> >> (http://www.lshift.net/blog/2012/06/27/resumable-exceptions-can-macro-expres…) >> >> Handily, http://ss3.gemstone.com/ss/Control _does_ do this - keep the >> information on the stack, that is. Look at the >> DelimitedDynamicVariable tests in that package. > > > Yeah, right, but it lacks the performance advantage of DynamicVariable over > Exceptions. Sure: every time you want to evaluate the delimited dynvar you have to walk the stack up to the last set value. The solution to that would be to hack Contexts to support the dynamic environment, but that would be rather more drastic. The choices thus become, if you want sensible behaviour with general stack hacking: * have DynamicVariables that have broken behaviour when you do any kind of stack manipulations (and they cannot be fixed: implement them differently and you'll simply have _different_ broken behaviour) * take the performance hit and use DelimitedDynamicVariables as they are * spend ages hacking the image/VM to support dynamic environments directly, instead of using resumable exceptions. (Essentially you'd need to extend a Context to have a Dictionary (or similar) containing the dynamic environment. Touching Context means - as far as I understand things, at least - touching the VM because the VM knows a whole lot about Contexts.) frank > I don't think it's too much hassle to serialize the variables of > the Process besides the stack (sometimes you just can't avoid it), but if > you think it is, then a mixed system is the best solution: > - store the value both in the process and on the stack > - start the lookup in the process first, if the variable is not found there, > then continue on the stack and store the result in the process before > returning it, so it will be found next time there That sounds like a reasonable workaround to address Mariano's immediate problem :) frank > Levente > > >> >> frank >> >>> Levente >>> >>> >>>> >>>> ZnClient>>#signalProgress >>>> "Return true if I signal HTTPProgress notifications during >>>> execution." >>>> >>>> ^ self optionAt: #signalProgress ifAbsent: [ false ] >>>> >>>> Sven >>>> >>>> On 25 Aug 2012, at 12:50, Frank Shearar <frank.shearar(a)gmail.com> wrote: >>>> >>>>> On 25 August 2012 09:31, Mariano Martinez Peck <marianopeck(a)gmail.com> >>>>> wrote: >>>>>> >>>>>> >>>>>> Hi Sean. I am still seing the problem :( >>>>>> It is difficult to make it YOU to reproduce it, but it is easy that >>>>>> tomorrow >>>>>> I show it to you :) >>>>>> Basically, what is happening is that >>>>>> >>>>>> ZnClient >> executeRequestResponse >>>>>> self logRequest. >>>>>> ZnSignalProgress enabled ifTrue: [ HTTPProgress signal: 'Writing >>>>>> request' ]. >>>>>> request writeOn: connection. >>>>>> connection flush. >>>>>> ZnSignalProgress enabled ifTrue: [ HTTPProgress signal: 'Reading >>>>>> response' >>>>>> ]. >>>>>> response := request method = #HEAD >>>>>> ifTrue: [ ZnResponse readHeaderFrom: connection ] >>>>>> ifFalse: [ >>>>>> self streaming >>>>>> ifTrue: [ ZnResponse readStreamingFrom: connection ] >>>>>> ifFalse: [ ZnResponse readFrom: connection ] ]. >>>>>> self logResponse >>>>>> >>>>>> throws a mustBeBoolean in the first line "ZnSignalProgress enabled ". >>>>>> It >>>>>> seems that such expression answered the SmallINteger 30 the first >>>>>> time. >>>>>> If I take the debugger and I evaluate ZnSignalProgress enabled again, >>>>>> it >>>>>> answers me false, which is the correct value. >>>>>> Ahh yes, this in latest 2.0. >>>>> >>>>> >>>>> >>>>> I would have expected a ZnSignalProgress class >> default saying "^ >>>>> true" (or something else of a Boolean nature). DynamicVariables have a >>>>> default value of nil unless otherwise set. Or, since you're getting a >>>>> value of 30, something somewhere is saying ZnSignalProgress value: 30 >>>>> during: ["something"]... which would be very weird. >>>>> >>>>> frank >>>>> >>>>>> Thanks! >>>>>> >>>>>> >>>>>> On Fri, Aug 17, 2012 at 10:32 PM, Mariano Martinez Peck >>>>>> <marianopeck(a)gmail.com> wrote: >>>>>>> >>>>>>> >>>>>>> >>>>>>> Hi Frank and Sean. The problem was quite hard to reproduce. You need >>>>>>> to >>>>>>> rebuild a Pharo image from a kernel using Tanker ;) >>>>>>> Anyway, since we are changing completely Tanker now it may have been >>>>>>> solved. I did a quick test (of a similar case) and it works. So once >>>>>>> I >>>>>>> have >>>>>>> the example of the kernel again I will trying again. >>>>>>> Thanks for offering the help! >>>>>>> >>>>>>> >>>>>>> On Fri, Aug 17, 2012 at 2:33 PM, Sean P. DeNigris >>>>>>> <sean(a)clipperadams.com> >>>>>>> wrote: >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> Mariano Martinez Peck wrote >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> The first time, #enable answers something wrong. The second time it >>>>>>>>> is >>>>>>>>> called, it seems to answer the correct value. >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> Mariano, would you give some more details about the wrong value, the >>>>>>>> expected value, and the steps to reproduce? I took a look but I'm >>>>>>>> not >>>>>>>> seeing >>>>>>>> what the problem is... b.t.w. is this a 1.4 or 2.0 image? >>>>>>>> >>>>>>>> Sean >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> -- >>>>>>>> View this message in context: >>>>>>>> >>>>>>>> >>>>>>>> http://forum.world.st/serializing-DynamicVariables-Zinc-so-far-tp4643514p46… >>>>>>>> Sent from the Pharo Smalltalk mailing list archive at Nabble.com. >>>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> -- >>>>>>> Mariano >>>>>>> http://marianopeck.wordpress.com >>>>>>> >>>>>> >>>>>> >>>>>> >>>>>> -- >>>>>> Mariano >>>>>> http://marianopeck.wordpress.com >>>>>> >>>>> >>>> >>>> >>>> >>> >> >> >

Aug. 26, 2012

[Pharo-project] Squeaksource is down

by Hilaire Fernandes

Any brave soul to resurrect it. Thanks Hilaire

Aug. 26, 2012