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Re: [Pharo-project] [vwnc] Any serializer can customize serialization strategy?
by HernÃ¡n Morales Durand Oct. 14, 2011

Oct. 14, 2011

Hi Paul, Thanks for your detailed reply. What you describe seems suitable for my needs (I'm interested in simplest techniques, my problem is complex enough to try premature improvements at the tool level :) however I cannot comment more until I do some real experiments with SRP. Thanks again HernÃ¡n 2011/10/12 Paul Baumann <paul.baumann(a)theice.com>: > HernÃ¡n, > > There are several ways to do it with SRP. > > The encoding supports embedded data (variable and fixed width), so you could do inline serialization. It is clever enough that it is even possible to do this with positional access even to base64 encoded data. Tricks like that are used for example to update individual values in a persistent index. There are simpler techniques that should work for any marshaler... > > All marshalers should have some form of pre-save and post-load exchange. SRP has many ways to pre-save and post-load while maintaining relative references. SRP can even do post-load exchanges after the rest of the object graph is loaded and still keep relative references (without using a #become:). > > Save a proxy in place of the object. The proxy would be a class that you create to do what you want as a post-load actions. You can create the proxy as part of a pre-save action. The proxy can have the encoded binary ByteArray you want embedded in the data. The post-load of the proxy would typically unmarshal the embedded data. Here is an example of a class-based exchange: > > SpecialSaveObject>>srpSavePreMap: aContext > Â Â Â Â ^MyOtherMarshalProxy newFor: self > > MyOtherMarshalerProxy.binData > > MyOtherMarshalerProxy class>>newFor: anObject > Â Â Â Â ^self new save: anObject > > MyOtherMarshalProxy>>save: anObject > Â Â Â Â binData := self marshaler saveAsBinary: anObject. > > MyOtherMarshalerProxy>>srpLoadPostMap: aContext > Â Â Â Â ^OtherMarshaler loadFromBinary: binData > > Depending on your needs, you might want your object to remember the embedded data. In that case, you could store the encoded data in an inst var that is lazy-initialized as a pre-save action and save only that inst var. A post-load action could perhaps read the other attributes from the encoded data that you saved. > > SRP also allows any object to answer back "extended attributes" that are saved with an object (#srpExtendedAttributes) and can be restored after loading (#srpExtendedAttributes:). Extended attributes are typically data you want associated with an object that is not directly referenced by the object. You could save/load encoded data along with the SRP saved object. > > Paul Baumann > > > > -----Original Message----- > From: vwnc-bounces(a)cs.uiuc.edu [mailto:vwnc-bounces@cs.uiuc.edu] On Behalf Of HernÃ¡n Morales Durand > Sent: Monday, October 10, 2011 15:36 > To: Pharo Development; The general-purpose Squeak developers list; vwnc mailing list > Subject: [vwnc] Any serializer can customize serialization strategy? > > Is there any serializer (Fuel/StOMP/Ma object > serialization/BOSS/SRP/SIXX??) which let me attach an external > compressor/decompressor for specific Strings to the > serialization/deserialization process? With external I mean it could > be in a separate binary (I could arrange the binding though). > Thanks > > HernÃ¡n > > _______________________________________________ > vwnc mailing list > vwnc(a)cs.uiuc.edu > http://lists.cs.uiuc.edu/mailman/listinfo/vwnc > > This message may contain confidential information and is intended for specific recipients unless explicitly noted otherwise. If you have reason to believe you are not an intended recipient of this message, please delete it and notify the sender. This message may not represent the opinion of IntercontinentalExchange, Inc. (ICE), its subsidiaries or affiliates, and does not constitute a contract or guarantee. Unencrypted electronic mail is not secure and the recipient of this message is expected to provide safeguards from viruses and pursue alternate means of communication where privacy or a binding message is desired. >

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[Pharo-project] OSProcess bug in Pharo 1.3
by Sean P. DeNigris Oct. 14, 2011

Oct. 14, 2011

Every time I save my image, UnixOSProcessAccessor>>#grimReaperProcess causes 'MessageNotUnderstood: receiver of "wait" is nil'. Is anyone else experiencing this? Thanks. Sean -- View this message in context: http://forum.world.st/OSProcess-bug-in-Pharo-1-3-tp3903350p3903350.html Sent from the Pharo Smalltalk mailing list archive at Nabble.com.

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Re: [Pharo-project] [squeak-dev] Re: Migrating Complex in a separate package
by Nicolas Cellier Oct. 13, 2011

Oct. 13, 2011

Here is a first commit of Squeak/trunk Complex into a separate Math-Complex package. This is useful for Pharo users at least. No rename, no refactoring (but methods #asComplex and #adaptToComplex:andSend: moved to Number) , just the Squeak version. Nicolas 2011/10/12 Juan Vuletich <juan(a)jvuletich.org>: > Nicolas Cellier wrote: >> >> Thanks all for your answers. >> Too many words for a single post, so I compiled a few comments and >> Complex implementation reflections in this blog entry: >> http://smallissimo.blogspot.com/2011/10/about-complex-in-squeak.html >> >> I'm not satisfied with current status because we are mixing two paradigms. >> >> Note that putting Complex outside the image is also an easy solution >> for playing with paradigms without causing undesired side effects to >> Complex-unaware-Applications. >> But maybe it's too easy to divert like this, and we should better >> think harder ;) >> >> Nicolas >> > > Thanks! Good analysis, hard decision. > > In any case, I don't think it is needed to have Complex as an external > package just for the automatic conversion issue. It is enough to have a > preference. > > Cheers, > Juan Vuletich > >> 2011/10/11 Ricardo Moran <richi.moran(a)gmail.com>: >> >>> >>> On Tue, Oct 11, 2011 at 9:51 AM, Juan Vuletich <juan(a)jvuletich.org> >>> wrote: >>> >>>> >>>> Juan Vuletich wrote: >>>> >>>>> >>>>> Hi Folks, >>>>> >>>>> Rodney Polkinghorne wrote: >>>>> >>>>>> >>>>>> ... >>>>>> >>>>>> extra fact: >>>>>> - Complex is absent from Cuis >>>>>> >>>>>> >>>>> >>>>> Not for long :) . I have already integrated it and will be in next Cuis >>>>> release. I think Complex belongs in the base system. >>>>> >>>> >>>> Oh, forgot to say. I also think that >>>> Â -1 sqrt = 1i >>>> should be true, and I'm working on it (together with some other tweaks >>>> to >>>> #sqrt and friends I'll publish when finished). >>>> >>> >>> +1. I was just about to comment on that one :) >>> It always bothered me that "-1 sqrt" wouldn't answer "1i". It seems like >>> an >>> incomplete implementation, being that we have the class Complex. >>> At the time I "fixed" it by just relying on the fact that the sqrt >>> primitive >>> fails when the receiver is negative, but that solution seems very >>> hackish. I >>> wonder what your solution looks like? :) >>> Cheers, >>> Richo >>> >>> >>>> >>>> Thoughts? >>>> >>>> Cheers, >>>> Juan Vuletich >>>> >>>> >>> >>> >>> >>> >> >> >> >> ----- >> No virus found in this message. >> Checked by AVG - www.avg.com >> Version: 10.0.1410 / Virus Database: 1522/3943 - Release Date: 10/07/11 >> >> >> >> > > >

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Re: [Pharo-project] [ANN] Pharo Glorp port release
by Mariano Martinez Peck Oct. 13, 2011

Oct. 13, 2011

On Thu, Oct 13, 2011 at 1:56 PM, jtuchel(a)objektfabrik.de < jtuchel(a)objektfabrik.de> wrote: > Hi, > > DBXTalk is good work! > I really love to see that stuff going forward! > > Thanks. > Before I spend a lot of time playing around: has anybody tried using > Pharo/GLORP/ODBC (Access or SQLSrv) on Windows? > Yes, but I have to admit that it's almost the most complicated scenario to configure. At least I know someone tried Pharo/Glorp/ODBC/SQL Server. I think you can just give it a try. Get the dll of OpenDBX (they are in our website), get a Pharo VM that has a working FFI, and give it a try. > Or Pharo/GLORP/SQLite on Windows? > Yes, this works almost out of the box. In fact, I can provide you a zip that contains Pharo VM + image + opendbx dll + sqlite dll. > Is there some place on the web where I can find info on how to set this up? > > http://dbxtalk.smallworks.com.ar/Compiling%20and%20installing%20OpenDBX http://dbxtalk.smallworks.com.ar/Compiling%20for%20different%20backends > In an open source context, this is probably a heretic question, and if I > could choose freely, Linux and PostgresQL would be my favorite. > Sure, that's pretty easy. OpenDBX and PostgreSQL are easy to make it work in Linux. > OTOH: The fact that each windows installation comes with an Access engine > and respective ODBC driver makes the combination very attractive for > starting something on a windows machine really fast. No installation of > anything but Pharo, no need for admin rights or anything. Just set up the > odbc driver and off you go! Great chance to show the strength of Smalltalk > and Glorp to other team members and friends... > well more or less. In the case of DBX you will need the OpenDBX library anyway, even if being ODBC. OpenDBX sees ODBC just as another backend. And of course, that's only if you like accessing by ODBC (which I don't like BTW). Of course, you can create a database driver for Glorp that uses the ODBC driver of squeak in which case you wouldn't need the OpenDBX driver. > SQLite is a similar story: copy the dlls onto the machine and the journey > can start. > > yes, that's even easier. As I say, it can be provided in a "DBXOneClick" :) Cheers -- Mariano http://marianopeck.wordpress.com

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[Pharo-project] P2P library in Smalltalk
by StÃ©phane Ducasse Oct. 13, 2011

Oct. 13, 2011

Hi guys is there a library for doing P2P in Smalltalk? Stef

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[Pharo-project] Pharo Consortium News: let's make it real.
by StÃ©phane Ducasse Oct. 13, 2011

Oct. 13, 2011

Hello everybody We got a final discussion with INRIA representatives and we will now set up a consortium for pharo. INRIA will support the consortium by funding on advanced engineer for a year (may be two if the consortium work well). So this is quite good around 55Keuros on consortium. There some strings attached: We will not be able to pay remote development since this is regulated under the public market french laws but we will be able to hire people (on french rate if they work in France). We will have to see the legal period to spent the money. The general idea is to see how the consortium evolves: ideally we would like to see if we can get it outside inria within a five years period. Now what we plan to do: - We would like to make the list of companies that sign the agreement letter public. Because this is important that other companies joins the consortium. - We will offer a free participation to any individual. - We are wondering if we could have a academic fee for the institution that want it: we have to discuss the fee. Any suggestions would be good: I was thinking that 500 Euros would be good for rich countries and 200 for the other ones. Now tell us. - We could also have way to pay a license or a way to give money to the consortium. Now the complex part: - we would like to collect money from companies and again we will need your help to understand what is the correct model. We are thinking: single person company: starting at 300 Euros "small company": starting at 2500 Euros large companies: starting at 5000 Euros. We would like to keep the model really simple and transparent. Now our goal is to be able to pay an engineer like igor full time because there is so much to do. But each day we get closer to what we want. Stef and Marcus.

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[Pharo-project] [update 1.4] #14192
by StÃ©phane Ducasse Oct. 12, 2011

Oct. 12, 2011

14192 ----- Cleaning obsolete traits for 4904 Stef

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[Pharo-project] browser and non existent method
by sergio_101 Oct. 12, 2011

Oct. 12, 2011

hi, all.. i am starting a relatively big project for fun, and am using pharo/seaside after being away for awhile.. the last time i used this combo, i remember that if you called a non existent method in the browser, a confirmation would pop up, and if you confirmed that you indeed wanted to use that non existent method, it would bring up a code browser on that method. then, all you would have to do is fill in the method guts and hit continue.. am i remembering this correctly? i am using the current seaside one click image .. thanks! -- ---- peace, sergio photographer, journalist, visionary http://www.ThoseOptimizeGuys.com http://www.CodingForHire.com http://www.coffee-black.com http://www.painlessfrugality.com http://www.twitter.com/sergio_101 http://www.facebook.com/sergio101

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Re: [Pharo-project] [squeak-dev] Re: Migrating Complex in a separate package
by Nicolas Cellier Oct. 11, 2011

Oct. 11, 2011

Thanks all for your answers. Too many words for a single post, so I compiled a few comments and Complex implementation reflections in this blog entry: http://smallissimo.blogspot.com/2011/10/about-complex-in-squeak.html I'm not satisfied with current status because we are mixing two paradigms. Note that putting Complex outside the image is also an easy solution for playing with paradigms without causing undesired side effects to Complex-unaware-Applications. But maybe it's too easy to divert like this, and we should better think harder ;) Nicolas 2011/10/11 Ricardo Moran <richi.moran(a)gmail.com>: > > On Tue, Oct 11, 2011 at 9:51 AM, Juan Vuletich <juan(a)jvuletich.org> wrote: >> >> Juan Vuletich wrote: >>> >>> Hi Folks, >>> >>> Rodney Polkinghorne wrote: >>>> >>>> ... >>>> >>>> extra fact: >>>> - Complex is absent from Cuis >>>> >>> >>> Not for long :) . I have already integrated it and will be in next Cuis >>> release. I think Complex belongs in the base system. >> >> Oh, forgot to say. I also think that >> Â -1 sqrt = 1i >> should be true, and I'm working on it (together with some other tweaks to >> #sqrt and friends I'll publish when finished). > > +1. I was just about to comment on that one :) > It always bothered me that "-1 sqrt" wouldn't answer "1i". It seems like an > incomplete implementation, being that we have the class Complex. > At the time I "fixed" it by just relying on the fact that the sqrt primitive > fails when the receiver is negative, but that solution seems very hackish. I > wonder what your solution looks like? :) > Cheers, > Richo > >> >> Thoughts? >> >> Cheers, >> Juan Vuletich >> > > > > >

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Re: [Pharo-project] [squeak-dev] Re: Migrating Complex in a separate package
by Chris Muller Oct. 11, 2011

Oct. 11, 2011

>>> - the name of the class can be Complex or ComplexNumber >>> Specifically I don't like isComplex, many objects could respond true >>> because complicated; >>> isComplexNumber is much more explicit. >>> We could also think of having complex expressions in a symbolic >>> algebra, and isComplexNumber would be true only for a literal value.. >>> >>> What I could eventually do is publish an old Complex in package >>> Complex for backard compatibility and an updated ComplexNumber in a >>> Math-Complex package... >>> >>> How many of you use Complex ? >>> What do you think of these proposals ? >>> > > I do not have a strong position between Complex and ComplexNumber. I think > Complex is not that bad. But I think we should be careful about namespace consumption. "Complex" is very broad and ambiguous and could potentially create headaches for other domains that want to define a class named Complex.

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