August 2011 - Pharo-users - lists.pharo.org

Research Engineer Position at INRIA
by StÃ©phane Ducasse Aug. 23, 2011

Aug. 23, 2011

Hi guys We have a position for an engineer position around dynamic language (javascript, smalltalk) and security. Engineer position â¢ Duration: 1-2 years â¢ Starting date: end 2011/beginning 2012 â¢ Where: RMOD team at INRIA Lille Nord Europe http://rmod.lille.inria.fr/ â¢ Salary: 55 Keuros net (before taxes) Keywords: dynamic languages, security, information flow, Smalltalk, Javascript The position will take place in the context of the Systematic Resilience project. Three main tasks will be our focus: â¢ Develop a component model named JIO to manage I/O user interface in Javascript for cloud applications â¢ Identification of security problems in Javascript â¢ Study and analyze approaches towards securing Javascript and dynamic languages (Caja, isolate...) â¢ Prototype of a safe architecture for Resilience Please contact Stephane Ducasse (Stephane.Ducasse(a)inria.fr) for more information. ------------------------ Dr. StÃ©phane Ducasse -- Directeur de Recherche (Senior Researcher) INRIA - USTL - CNRS UMR 8022 stephane.ducasse(a)inria.fr http://stephane.ducasse.free.fr http://rmod.lille.inria.fr/ **NEW ***Tel 00 33 (0)3 20 43 42 56 - Fax 33 3 59 57 78 50 40, avenue Halley, Parc Scientifique de la Haute Borne, BÃ¢t.A, Park Plaza, Villeneuve d'Ascq, FR-59650, France.

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3 years postdoc position on dynamic language and security
by StÃ©phane Ducasse Aug. 23, 2011

Aug. 23, 2011

We have a 3 year postdoc position on dynamic languages and security: http://rmod.lille.inria.fr/web/pier/blog/2011-08-19-2 Do not hesitate to apply Postdoc Position â¢ Duration: 3 years â¢ Starting date: end 2011 â¢ Where: RMOD team at INRIA Lille Nord Europe http://rmod.lille.inria.fr â¢ Salary: 55 Keuros net (before taxes) Keywords: dynamic languages, security, information flow, Smalltalk, Javascript The position will take place in the context of the Systematic Resilience project. We will focus on the following main tasks: â¢ Identification and understanding of security problems in Javascript and other dynamic languages â¢ Study and analyze existing approaches towards securing Javascript (Caja, isolates...) â¢ Comparison of different approaches to secure dynamic applications (Zope model, ZTK), Ruby â¢ Study of Mirrors/Capabilities as a basis for security in Javascript â¢ Proposition of an safe architecture for Resilience Please contact Stephane Ducasse (Stephane.Ducasse(a)inria.fr) for more information. Stef ------------------------ Dr. StÃ©phane Ducasse -- Directeur de Recherche (Senior Researcher) INRIA - USTL - CNRS UMR 8022 stephane.ducasse(a)inria.fr http://stephane.ducasse.free.fr http://rmod.lille.inria.fr/ **NEW ***Tel 00 33 (0)3 20 43 42 56 - Fax 33 3 59 57 78 50 40, avenue Halley, Parc Scientifique de la Haute Borne, BÃ¢t.A, Park Plaza, Villeneuve d'Ascq, FR-59650, France.

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Moving SqueakDBX mailing list to a new DBXTalk one
by Mariano Martinez Peck Aug. 22, 2011

Aug. 22, 2011

Hi guys. We are moving the mailing list of squeakdbx(a)lists.squeakfoundation.org to a new google group: http://groups.google.com/group/dbxtalk We welcome you in the new mailing list and please deprecate as soon as possible the old one. Cheers -- Mariano http://marianopeck.wordpress.com

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ESUG = Edinburgh Airport
by Benjamin Aug. 20, 2011

Aug. 20, 2011

Is there some of you who will arrive at the Edinburgh airport around 17h ? Because Jannik Laval and I will be there, so if we can share a taxi and be a bit less lost, it could be cool :) Ben

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Memories about an ESUG talk: Smalltalk's Image Problem
by Offray Vladimir Luna CÃ¡rdenas Aug. 19, 2011

Aug. 19, 2011

HI all, I was making a talk here in Colombia trying to invite people to conform a Smalltalk study group. I was showing them Pier and Seaside as "selling points" for making a project and there is some initial interest. The typical questions about: * If Smalltalk is so good, why is not widely known ? * Which famous/big project is made with Smalltalk ? where in place. I think that Pier, Seaside, Etoys, Scratch, DrGeo, Croquet, are really good projects to motivate people towards learning Smmalltalk, but they're kind of "niche" projects (I have no problem with that), but searching for information about who to solve these questions I found this talk on ESUG 2009: http://www.esug.org/Conferences/2009/Current+List+of+Talks/Smalltalk%27s+Im… So I wonder if anyone has the memories/slides of this talk and, of course, what community thinks about these questions. Thanks, Offray

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Fwd: [ANN] Fuel release version 1.6
by Mariano Martinez Peck Aug. 19, 2011

Aug. 19, 2011

---------- Forwarded message ---------- From: Martin Dias <tinchodias(a)gmail.com> Date: Fri, Aug 19, 2011 at 6:14 AM Subject: [ANN] Fuel release version 1.6 To: esug-list(a)lists.esug.org, pharo-project(a)lists.gforge.inria.fr Cc: Mariano Martinez Peck <marianopeck(a)gmail.com> Hello! I want to announce the new release version number 1.6 of Fuel, a binary serialization framework for Pharo that provides extremely fast deserialization. More information on our home page<http://rmod.lille.inria.fr/web/pier/software/Fuel>. Again, I thank ESUG for sponsoring me through the SummerTalk<http://www.esug.org/wiki/pier/Promotion/SummerTalk/SummerTalk2011>program. You can download this version in Pharo 1.2.1 with: Gofer new squeaksource: 'Fuel'; package: 'ConfigurationOfFuel'; load. ((Smalltalk at: #ConfigurationOfFuel) project version: '1.6') load. This version does not add any new concrete functionality but has two main achievements: a performance improvement and a design clean up. Many changes included in this release are part of a design clean up. They are a necessary step forward to new functionalities that are coming soon. They make code more understandable. They enable simpler extension. Happily they also helped to improve serialization performance by reducing unnecessary interactions. And it is specially important a bottleneck in graph analysis stage we have successfully attacked, obtaining great results. Details: - Removed explicit references to cluster classes scattered around the system. For example, in previous versions Float>>fuelCluster has an explicit reference to FLFloatCluster. This version replaces this by a double dispatch interaction. - Clusters: Better reification. Removed annoying IDs. Removed Singleton instance creation mechanism, now mappers manage uniqueness in a better way. - Mappers: They were simplified. New mapping machanism inspired on Chain of Responsibility pattern. The global objects detection has been optimized considerably. - Analyzer: Part of its behavior and state has been moved to a new abstraction called 'clusterization'. Best regards, MartÃn Dias -- Mariano http://marianopeck.wordpress.com

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Re: [Pharo-users] [opendbx] DBXTypeNotSupoorted with Glorp
by Mariano Martinez Peck Aug. 16, 2011

Aug. 16, 2011

On Tue, Aug 16, 2011 at 8:46 AM, Alain Rastoul <alr.dev(a)free.fr> wrote: > ** > Hi Mariano, > Yes, that is what is expected, but in the case of SQLite, the column type > changes to SQLITE_NULL for nulls and that is a problem in squeakdbx now. > I think column datatype should not be stored in the resultset in the case > of sqlite. > Other databases don't behave this way (as far as I can remember), so, > overriding moveNext for sqlite would probably be fine. > > So yes. Something is needed for Sqlite so that the column type and friends are fetched for every raw or at least when there is an unknown. At least there is a DBXSqlitePlatform that let you easily overwrite stuff ;) > Cheers > Alain > > "Mariano Martinez Peck" <marianopeck(a)gmail.com> a Ã©crit dans le message de > news: CAA+-=mWHq6X9JGz-5qTyb3z5ZqdUwMwBV06B5AEZ=ivZVE4u4g(a)mail.gmail.com > ... > And here: http://www.linuxnetworks.de/doc/index.php/OpenDBX/C_API/Usage > > I can read: > > " Processing results > > After fetching a row, all values of this row are available for further > processing, as well as their name, length and type - but the name and the > type of a column won't change. Also the number of columns returned by > odbx_column_count<http://www.linuxnetworks.de/doc/index.php/OpenDBX/API/odbx_column_count>() > is fixed for the whole result. > > int i; > > for( i = 0; i < odbx_column_count( result ); i++ ) > { > fprintf( stdout, "Name: %s\n", odbx_column_name( result, i ) ); > fprintf( stdout, "Type: %d\n", odbx_column_type( result, i ) ); > fprintf( stdout, "Length: %d\n", odbx_field_length( result, i ) ); > fprintf( stdout, "Value: %s\n", odbx_field_value( result, i ) ); > } > > > Besides odbx_column_type<http://www.linuxnetworks.de/doc/index.php/OpenDBX/API/odbx_column_type>() > these functions don't return error codes. Instead, they return zero ( > odbx_field_length<http://www.linuxnetworks.de/doc/index.php/OpenDBX/API/odbx_field_length>()) > or NULL (odbx_column_name<http://www.linuxnetworks.de/doc/index.php/OpenDBX/API/odbx_column_name>() > and odbx_field_length<http://www.linuxnetworks.de/doc/index.php/OpenDBX/API/odbx_field_length>()), > but you shouldn't check for those because these values are also valid return > values. > > All numbers are returned as strings from the database regardless if they > are integers or floats. If you want to do arithmetic operations, you have to > convert them to their machine dependent binary representation first. > " > > On Mon, Aug 15, 2011 at 11:11 PM, Mariano Martinez Peck < > marianopeck(a)gmail.com> wrote: > >> >> >> On Mon, Aug 15, 2011 at 9:59 PM, Alain Rastoul <alr.dev(a)free.fr> wrote: >> >>> ** >>> Hi, >>> I finally found that when called in C with the same api calls that those >>> made by opendbx, sqlite correctly returns datatype of columns when fetching >>> rows, the problem is clearly that the data type is stored in SQueakDBX >>> column description for the resultset the first time it fetches the first >>> row. >>> For sqlite, squeakdbx should call the sqlite api to retrieve column >>> datatype for each row and each colum while fetching data. >>> >> >> Hi Alain. I am reading this: >> http://www.linuxnetworks.de/doc/index.php/OpenDBX/C_API/odbx_column_type >> >> From SqueakDBX, we send odbx_column_type ONCE PER RESULTSET. >> You can see this in #processNextResultSet:querySettings: that for every >> resultset it sends #processResultWithRows:resultHandle:querySettings: >> >> Now.... should we send odbx_column_type and friends ONCE PER RAW? As far >> as I can see, in other databases we don't need to do that. But maybe we are >> wrong and you are right. >> Norbert? >> >> Anyway, if you want to give it a try to Sqlite, what about overwrite >> #moveNext: in SqlitePlatform and do something to set the new type for every >> raw. >> >> From what I can see, if the type depends on each raw and it should be >> asked for every raw, then a design change is needed so that we can move the >> description from the REsultSet to the Raw :) >> >> >> But it may have implications I don't know. Perhaps squeakDbx could get >>> only true object values (are rawValues really needed) ?. >>> >> >> Well, it depends on the user needs. Now, a key point is what GLORP should >> use. >> >> >>> Or perhaps another solution would be to call the sqlite api if the >>> stored datatype is UNKNOWN in column description ... (only for sqlite, >>> but sounds like a bad trick) >>> >> >> sounds like a hask, but if it works it is at least a valid workaround. >> >> >>> I am perplexed ... >>> >>> Any idea is welcome >>> >>> Cheers >>> Alain >>> >>> "Mariano Martinez Peck" <marianopeck(a)gmail.com> a Ã©crit dans le message >>> de news: >>> CAA+-=mW69g-MP3fQutJ9vVhAjRoP9eZdv5Z0Zkv9junYZeTyKw-JsoAwUIsXosN+BqQ9rBEUg(a)public.gmane.org >>> ... >>> >>> >>> On Sat, Aug 13, 2011 at 12:06 AM, Alain Rastoul <alr.dev(a)free.fr>wrote: >>> >>>> ** >>>> It doen't work. >>>> Howerver googling for opendbx msg00483, I found >>>> >>>> http://www.mail-archive.com/libopendbx-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ…<http://www.mail-archive.com/libopendbx-devel-5NWGOfrQmnetEtDZOKyKiw@public.…> >>>> >>> >>> yes, that one :) >>> >>> >>>> it seems to be the problem of the issue 10, and I think the same >>>> problem I have.. >>>> >>> >>> yes >>> Sorry, I cannot do more.... :( >>> >>> >>>> Strange that it doesn't work with MSSQL too.. >>>> >>>> >>>> "Mariano Martinez Peck" <marianopeck(a)gmail.com> a Ã©crit dans le >>>> message de news: >>>> CAA+-=mW4rwrLMhMAzsLhQ5zEWZBG_Jg=BF2dKu3wsxw0=io=iQ(a)mail.gmail.com... >>>> >>>> >>>> On Fri, Aug 12, 2011 at 11:14 PM, Alain Rastoul <alr.dev(a)free.fr>wrote: >>>> >>>>> ** >>>>> I used the following script (about 2 months ago I think ) in Pharo 1.3 >>>>> "SqueakDBX" >>>>> Gofer new squeaksource: 'MetacelloRepository'; >>>>> package: 'ConfigurationOfSqueakDBX'; >>>>> load. >>>>> ConfigurationOfSqueakDBX project latestVersion load. >>>>> >>>>> "GLORP" >>>>> Gofer new squeaksource: 'MetacelloRepository'; >>>>> package: 'ConfigurationOfGlorpDBX'; >>>>> load. >>>>> ConfigurationOfGlorpDBX project latestVersion load. >>>>> >>>>> >>>> Yes, you are using SqueakDBX ;) you will move soon to DBXTalk :) >>>> >>>> >>>>> II use DBXTestCase for my test with the code I send in my email (is >>>>> it ok for you?), but I will have alook at DBXQueryTest too. >>>>> No problem to put it in the test suite - it makes me remember that I >>>>> still didn't send my license agreement to Stephane but I will do it >>>>> asap... I hate papers ;-) >>>>> >>>> >>>> in our case we don't need that ;) >>>> >>>> >>>>> >>>>> http://www.mail-archive.com/libopendbx-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ… >>>>> The link is broken >>>>> >>>> >>>> >>>> http://www.mail-archive.com/libopendbx-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ… >>>> >>>> this one works? >>>> >>>> >>>> -- >>>> Mariano >>>> http://marianopeck.wordpress.com >>>> >>>> >>> >>> >>> -- >>> Mariano >>> http://marianopeck.wordpress.com >>> >>> >> >> >> -- >> Mariano >> http://marianopeck.wordpress.com >> >> > > > -- > Mariano > http://marianopeck.wordpress.com > > ------------------------------ > > > ------------------------------------------------------------------------------ > uberSVN's rich system and user administration capabilities and model > configuration take the hassle out of deploying and managing Subversion and > the tools developers use with it. Learn more about uberSVN and get a free > download at: http://p.sf.net/sfu/wandisco-dev2dev > > ------------------------------ > > > > ------------------------------------------------------------------------------ > uberSVN's rich system and user administration capabilities and model > configuration take the hassle out of deploying and managing Subversion and > the tools developers use with it. Learn more about uberSVN and get a free > download at: http://p.sf.net/sfu/wandisco-dev2dev > > _______________________________________________ > libopendbx-devel mailing list > libopendbx-devel(a)lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/libopendbx-devel > http://www.linuxnetworks.de/doc/index.php/OpenDBX > > -- Mariano http://marianopeck.wordpress.com

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DBXTypeNotSupoorted with Glorp
by Alain Rastoul Aug. 15, 2011

Aug. 15, 2011

Hi I 'm writing a small app with pharo +seaside + glorp + squeakdbx + sqlite and I have a problem reading null values from my database. It seems that glorp stores a DbxTypeNotSupported in the column description for null values when the first row has a null value (the column datatype is varchar). Any workaround or advice is welcome before I dig into Glorp code TIA Alain

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Aug. 15, 2011

Hi Friends please distribute that widely I will give a free lecture Discovering Smalltalk Smalltalk is a pure and elegant object language. This lectures will cover the fundamental aspects of Smalltalk: syntax, semantics, and key aspects of the system. Doing so we will also revise the real semantics of self/super. We will show the power of polymorphism in action by simply learning from the system. Finally we will go into more design aspect again based on the systems. As a bonus we will start the lecture with a 15 min presentation of Seaside a powerful web framework for dynamic web application. This lecture may be followed by a lecture on more advanced object-oriented design: law of demeter, encapsulation, multiple interface of classes, composition vs. inheritance Starting time: 9h30 Closing: 16h00 Location: http://www.esug.org/wiki/pier/Conferences/2011/The-Venue-in-Edinburgh Bio: He is expert in object-oriented language design, dynamic languages, reflective programming, language semantics as well as reengineering, program analysis, visualizations, software metrics. Recently he worked on traits, composable method groups, and this work got some impact. Traits have been introduced AmbiantTalk, Pharo, Perl-6, PHP 5.4 and Squeak. They influenced Scala and Fortress SUN Microsystems. Stephane is one of the developer of Pharo (http://www.pharo.project.org/) an open-source language inspired by Smalltalk. He is one of the core developer of Moose, an open-source reengineering environment (http://moose.unibe.ch/) He is the president of the European Smalltalk User Group and organize a yearly international conference on Smalltalk. He wrote a couple of fun books to teach programming and other serious topics such as dynamic web development (http://book.seaside.st) Stef

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cascaded update of objects with Glorp
by Alain Rastoul Aug. 14, 2011

Aug. 14, 2011

Hi, I am trying to update a composite object in a database with Glorp. I have a Customer object with a reference to an Address object. In my seaside app, I have a ListView that calls a CustomerEditView when I click on a customer. with: edit: aCustomer | response | response := self call: (self editor new model: aCustomer copy). response ifNotNil: [ self session database update: aCustomer with: response]. (database is a is a facade to the Glorp system, and update: anObject with: anotherObject perform the variable instance assignments of an object to another in a glorp unit of work). when I click on Cancel button in my CustomerEditView, the address is modified in the list with what has been typed in the form. (a shallow copy points to the same Address object) so I tryed: ... model: anObject deepCopy ... And I have a DuplicatePrimaryKeyException in Glorp when I click on the save button, because Glorp don't want to have two different objects with the same primary key - that makes sense. Do anyone know a way to do this in Glorp without updating each field of the linked object (in the final model, I will have 3 addresses), ie, doing the update cascade in a simple way. I am thinking about implementing an updateFrom: anotherObject or copyTo: anotherObject in my Customer and Address objects but it does not fit right with basic types (String, integers etc) and I am sure someone had the same problem before me. Any idea, comments or suggestions are welcome Thanks in advance, Cheers, Alain

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