"…mais ce serait peut-être l'une des plus grandes opportunités manquées de notre époque si le logiciel libre ne libérait rien d'autre que du code…"

Archive for the ‘DotNet’ Category

[Grenoble] Soirée Spéciale avec Bruce Eckel : Scala as a first programming language » le mercredi 12 octobre 2011

Posted by patrick sur octobre 7, 2011

Source:: http://www.jugevents.org/jugevents/event/41752

Est-il besoin de présenter Bruce Eckel ?
Sans doute avez vous déjà vus son nom sur les bestsellers: Thinking in Java ou Thinking in C++.

Nous profitons de sa présence à la conférence internationale ICALEPCS à l’ESRF pour l’inviter au Java User Group.

Bruce Eckel : Scala as a first programming language

Bruce Eckel : Scala as a first programming language

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Posted in 2011, Années, Architecture logicielle, C_sharp, design pattern, DotNet, Grenoble, java, Langages | Tagué: , , | Leave a Comment »

Python: news du 17 décembre 2008

Posted by patrick sur décembre 18, 2008

  • http://tarekziade.wordpress.com/2008/12/16/pycon-2009-talks/ (‘The talks that made it:
    • How AlterWay releases web applications using zc.buildout
    • On the importance of PyPI in delivering and building Python softwares – mirroring, fail-over and third-party package indexes »)
  • http://jessenoller.com/2008/12/16/pycon-2009-talks-accepted/ (‘Last night I got two emails – both of my talks I proposed for PyCon 2009 were accepted, here’s the title and abstract from both:
    • Introduction to Multiprocessing in Python
      • This talk will cover the new multiprocessing package included with Python 2.6 (and 3.0) focusing on design, benefits, practical usage, application construction, gotchas and how to use it to build multi-core and distributed applications.
    • Concurrency and Distributed Computing with Python Today
      • This talk will cover the recent changes to Python 2.6, including a brief introduction to the threading module and multiprocessing inclusion and changes but will primarily focus on the concurrent and distributed ecosystem for Python today.‘)

Posted in 2008, DotNet, Ironpython, Multiprocessing, package_management, python | Tagué: | Leave a Comment »

Quelques nouvelles de Mono: passage de la version 1.2.6 à la version 1.9.0 Preview, Gendarme, MoMA

Posted by patrick sur février 13, 2008

– Source: http://lists.ximian.com/mailman/listinfo/mono-devel-list (« I can tell you that we jumped from 1.2.6 to 1.9 in preparation for our next release which will be Mono 2.0. See the road map for more details of what that entails ( http://mono-project.com/Roadmap#Mono_2.0 « ).

http://lists.ximian.com/mailman/listinfo/mono-devel-list (« de miguel@ximian.com : « Hey folks, Am assembling the release notes for Mono 1.9, please send me additions, edits, etc:http://www.go-mono.com/archive/1.9« )

http://mono-project.com/Gendarme(« Gendarme is an extensible rule-based tool to find problems in .NET applications and libraries. Gendarme inspects programs and libraries that contain code in ECMA CIL format (Mono and .NET) and looks for common problems with the code, problems that compiler do not typically check or have not historically checked.The current Gendarme framework, Gendarme.Framework.dll, is a work in progress. It will probably change a lot before 1.0 is released. It’s main goal is to make it easier to write and test rules. The current Gendarme framework, Gendarme.Framework.dll, is a work in progress. It’s main goal is to make it easier to write and test rules. It requires a C# 3 compliant compiler to compile properly (it works with Mono from SVN and with VS.NET 2008). At this stage we’re not committed to a final API, so things may still change a lot before version 1.0 is released…You can follow the Gendarme’s development discussions on it’s Google Group . This is also where you’ll find the roadmap  to the future versions, (wish)list of todo, rules  proposal and developer documentation. Gendarme’s developers are also IRC (#gendarme on GIMPnet). Source code is available from SVN  (tarball . Since Mono 1.9.0 Gendarme is part of mono-tools and is probably available for your distro (if recent) or from openSUSE Build Service . »)

http://mono-project.com/Moma (« The Mono Migration Analyzer (MoMA) tool helps you identify issues you may have when porting your .Net application to Mono. It helps pinpoint platform specific calls (P/Invoke) and areas that are not yet supported by the Mono project. »)

http://tirania.org/blog/archive/2008/Feb-03.html (« Shawn at CogmationMono is being used as the scripting engine for their robotFoundry application… has written us to notify us that We discovered Mono while we were evaluating 3D engines. Mono was successfully being used to develop video games and it was extremely fast. We performed a small test and compared the speed between Python and C# mono and were shocked at how fast mono was compared to python. In addition to the speed increase and portability, we now had the ability to allow our users to write scripts in any .Net language... »)

Posted in DotNet, mono | Tagué: , , , | Leave a Comment »

Quelques nouvelles de python: cobra, fusil, django

Posted by patrick sur février 12, 2008

http://www.blueskyonmars.com/2008/02/08/cobra-programming-language/ ( » So, we’ve got Jython and IronPython as Python language reimplementations. There’s also Boo, which is clearly heavily inspired by Python but has some interesting extensions (static typing, for example). I just came across Cobra (http://cobra-language.com/). Cobra, like Boo, is built on the .NET platform. The syntax is clearly inspired by Python, which I consider a good thing. In keeping line noise to a minimum, Cobra even ditches the “:” at the end of the line preceding a block of code. Chuck Esterbrook has also pulled inspiration from a number of other places. I recognize some D and Eiffel in there (it’s got design by contract and unit tests built right into the classes). There’s a comparison to Python available right on the Cobra site. »)

http://www.haypocalc.com/blog/index.php/2008/01/04/112-fusil-version-07 (« L’idée de Fusil est de simplifier l’écriture d’un projet de fuzzing. Il suffit de décrire le scénario pour préparer et surveiller l’environnement, sans avoir à s’occuper des détails techniques (rediriger la sortie du processus, détecter un plantage, etc)« )

http://www.voidspace.org.uk/python/weblog/arch_d7_2008_01_26.shtml#e930 (« This is an early announcement of a new project: Python-System, an implementation of the BCL and other .NET libraries in pure Python. Before you decide I’m completely mad, let me explain my motivation. Smile

The goal here is to provide libraries (the BCL and other .NET libraries) to aid the porting of IronPython code to run on CPython. Specifically, I would like to get Resolver One spreadsheets, exported as code, to run under CPython. I’m opening it up because it may also be useful to other people, and maybe you’ll help me. Laughing

I will be starting with partial implementations of Array, DateTime, Color, Point and friends (the ‘low hanging fruit’). The goal is for ‘compatible but not necessarily complete’ implementations of the classes (etc) that I need. Code that is useful for other people will happily be added of course.« )

http://blog.michaeltrier.com/2008/2/11/this-week-in-django-10-2008-02-10 (« This week we talk about a few source commits, a discussion about unicode usernames, Some cool projects from the community, the Tip of the Week, and a couple of questions from the IRC. »)

http://www.djangoproject.com/weblog/2007/dec/16/book/ («  The Django Book started shipping last week, and we’ve put the full text online for free. We put a draft of the book up about a year ago for comments, and were amazed by the quality (and quantity!) of responses. We read each of the comments (around 2500) as we revised the book towards a final print release. That print release has been available in stores for about a week, and we’ve put the text up for you to read for free. »)

http://www.holovaty.com/blog/archive/2007/12/12/1311 (« …Now that the Django Book is finally in the can, I’m mulling the idea of writing another book — this time, a book about online journalism. In the past two years, I’ve been to (way too) many journalism-related events and conferences trying to spread the good word about « journalism via computer programming, » and I’ve detected a strong, I daresay furious, demand, from journalists at all levels in the org chart, for information about this new form of journalism. Higher-ups want to know why they should employ programmers; middle managers want to know how to find them and how to treat them; and working journalists want to learn these skills and strategies. The problem is that I can’t point them anywhere for in-depth information. This book would attempt to solve that. I want to take a shot at writing a manual, a manifesto, a practical guidebook to this emerging discipline of database-driven Web journalism. It would be a combination of high-level strategy and low-level technique, probably split cleanly into two parts (one for the suits, one for the non-suits). »)

http://www.biologeek.com/journal/index.php/astuces-et-bonnes-pratiques-django (« Développant avec Django depuis maintenant près de deux ans (ça rajeunit pas tout ça…), je suis encore surpris de découvrir de nouvelles possibilités de temps en temps. Dans mon combat pour les bonnes pratiques, je pense qu’il y a quelques bases à avoir pour se lancer dans un projet d’envergure avec Django. Je vais essayer de lister les miennes, n’hésitez pas à ajouter les vôtres pour que ça devienne une ressource collaborative…)

Posted in DotNet, Ironpython, python, tests | Tagué: , , | Leave a Comment »

Quelques nouvelles de python: Django, Python 3000, Ironpython, Zope/Plone

Posted by patrick sur décembre 17, 2007

Quelques nouvelles du monde python

  • django
  • python 3.0
  • zope/plone
  • ironpython

Django:

http://www.holovaty.com/blog/archive/2007/12/12/1311(« It’s here! At long last, the print copy of the Django Book has shipped. I received my author copies late last week and am still poking at them to make sure that, yes, a tangible book with my name on the cover has actually been printed, on real paper, by a real publisher. Now that the Django Book is finally in the can, I’m mulling the idea of writing another book — this time, a book about online journalism. In the past two years, I’ve been to (way too) many journalism-related events and conferences trying to spread the good word about « journalism via computer programming, » and I’ve detected a strong, I daresay furious, demand, from journalists at all levels in the org chart, for information about this new form of journalism. Higher-ups want to know why I want to take a shot at writing a manual, a manifesto, a practical guidebook to this emerging discipline of database-driven Web journalism. It would be a combination of high-level strategy and low-level technique, probably split cleanly into two parts (one for the suits, one for the non-suits) they should employ programmers; middle managers want to know how to find them and how to treat them; and working journalists want to learn these skills and strategies. The problem is that I can’t point them anywhere for in-depth information. This book would attempt to solve that. . »)

Python 3.0

  • http://www.artima.com/weblogs/viewpost.jsp?thread=220341 (« This is just a quick post to let everyone know that Python 3.0a2 is released as of 10:30am PST (18:30 UTC) today (Friday December 7, 2007). I’m grateful to the many people who have contributed to this release, in particular new core developers Christian Heimes and Amaury Forgeot d’Arc.GHOP contestants who contributed documentation updates, and to Georg Brandl for collecting these and submitting them to Subversion. There are still many more tasks available! However, I do want to mention that based upon the feedback for 3.0a1, we’ve decided to make the ‘bytes’ type immutable, and create a separate mutable bytes type, ‘bytearray‘. These two types are mutually compatible, but in the majority of cases you’ll be using bytes, not bytearray. I should also note that we’ve run into an issue with the Windows installers — see the release page above. If anyone can help this, please write to python-dev at python.org. (The script that creates the installer is in the distribution as Tools/msi/msi.py.) And finally, a word of thanks to all the participants « )
  • http://simonwillison.net/2007/Dec/16/chapter/ (« Chapter 7: Form Processing. The chapter on newforms I contributed to “The Definitive Guide to Django” is now online, along with the rest of the published book. »)
  • http://www.lethain.com/entry/2007/dec/04/two-faced-django-part-1-building-project-exists-si/ (« This series of articles aims, in the clear step-by-step style of the Django tutorial, to take you through the process of building a Django application that exists as both a simple web application, and also as a Facebook application. The web and Facebook applications will store information in the same database, using the same models, and thus users of one interface will be able to interact with the other.« )
  • http://simonwillison.net/tags/python/ : un excellent recueil de nouvelles sur Django

Zope, plone
http://encolpe.wordpress.com/2007/12/02/archgenxml-et-le-futur-de-la-generation-de-code-sous-zopeplone/ (« ArchGenXML et le futur de la génération de code sous Zope/Plone. Cela faisait un bon moment que je n’avais pas écrit un billet ici… et pour cause: on temps libre est principalement occupé par le développement et les tests de la version 2.0 de ArchGenXML. Contrairement à la version 1.5 qui ciblait Plone 2.1avec une compatibilité Plone 2.5 cette version est construite autour du support de Plone 3.0 avec une compatibilité vers Plone 2.5…Les buts atteints de cette version sont le passage en egg de ce module, le support des profils Generic Setup , la génération des interfaces Zope3, la génération des tests unitaires et des tests fonctionnels en python et au format doctest. Des gros changement en perspective, et une incompatibilité avec la génération précédente. Nous restons bloqués en phase d’évaluation béta par manque testeurs. Nous cherchons en particulier des testeurs pour la partie génération de workflows…Du coté du futur de la génération de code, ArchGenXML génère déjà du code Zope 3 (pour son utilisaton dans Plone) et d’autres projets de CMS en python commencent à s’intéresser à cette possibilité (voir la branche Django)…L’autre nouveauté, plus contraignante celle-ci, est l’utilisation de nouveaux connecteurs dans les schémas UML pour symboliser les ‘adapter’. Les versions précédentes d’ArchGenXML se satisfaisaient d’éditeurs utilisant UML 1.4 et il faut à présent des éditeurs utilisant UML 2.0 au minimum pour cette nouvelle fonctionnalité. Exit donc les éditeurs tel que ArgoUML qui était le seul éditeur UML libre supportéPour l’instant nous allons continuer d’utiliser ArgoUML et Poseidon pour le développement des fonctionnalités d’ArchGenXML. En un mois j’ai testé umbrello, gaphor, Apollo pour eclipse et Papyrus. Papyrus est vraiment très intéressant et est développé au CEA. Mais cela reste une extension d’eclipse donc il faut faire du Java pour générer du Python… c’est un peu dommage.« )

Ironpython

http://www.voidspace.org.uk/python/weblog/arch_d7_2007_12_08.shtml#e899 (« the last few days I’ve been off work trying to get a chapter on Windows Presentation Foundation finished. I haven’t got as much of the writing as I would have liked done, but I have finished the research and completed two of the three examples. WPF is great for creating funky user interfaces, and comes with some great controls. Despite the emphasis on XAML it is also easy to use from code…More importantly, two more chapters of IronPython in Action are available in the Manning Early Access Program. I’m pretty proud of these chapters. Chapter 7 is on testing with IronPython (including functionally testing a GUI application) and chapter 8 is about deeper aspects of Python and interacting with the .NET framework. The information in section 8.4 is vital to any non-trivial interaction with .NET so I’m glad it has gone liveWPF FlowDocuments are cool by the way, very high level document viewing controls for very little effort – but another new markup to learn (a subset of XAML) to use them« )

http://www.voidspace.org.uk/python/weblog/arch_d7_2007_12_08.shtml#e898 (…My talk is Python in your Browser with IronPython & Silverlight, the second one on the list!

Silverlight is a new browser plugin from Microsoft. It is intended for media streaming, games and rich internet applications. It is cross-platform and cross-browser and comes with a rich programmers API.

Through the Dynamic Language Runtime, Silverlight is fully programmable with IronPython – meaning that at last client side web applications can be written fully in Python. This talk will explore some of the things that you can do with IronPython in the browser.

This includes making web apps run faster, writing ‘rich’ applications (or games), and embedding a Python interpreter into web pages for tutorials and documentation.

It is a good year for IronPython talks (and so it should be). As well as my talk there are:

  • IronPython: The Road Ahead (48 – Jim Hugunin)
  • End-user computing without tears using Resolver, an IronPython spreadsheet (65 – Giles Thomas – the Resolver boss!)
  • Using .NET Libraries in CPython (103 – Mr. Feihong Hsu – a talk on Python.NET which definitely deserves more attention and is related to IronPython)

There is also a talk by another Resolver developer (not on IronPython though):

  • Getting started with test-driven development (5 – Jonathan Hartley)

It should be a great conference. Smile« )

http://www.resolverhacks.net/ ( » Resolver is a powerful tool for collecting, handling and analysing ‘business data’. It inhabits the space somewhere between a traditional spreadsheet and a Rapid Application Development tool. With Resolver you can use the familiar spreadsheet interface to create applications, build powerful spreadsheets pulling in data from databases and financial data-streams, or implement business logic to be integrated into other IT systems. Its power and flexibility comes from the fact that it is fully programmable with Python code, using the .NET framework. This means that you can use just about any .NET or Python library within your spreadsheets. You can also easily develop libraries of functions and classes to be shared between your spreadsheets. Spreadsheets can be exported as code, enabling you to re-use business logic with other Python or .NET applications.Resolver has a few other novel features, like shared worksheets which can be editted simultaneously by multiple users on different machines. We’re sure that new and innovative uses for Resolver will develop, and hopefully this website will help uncover some of them! Resolver can import and export data from Excel, and there are interesting tricks for communicating with or even driving Excel. You can also reference cells inside an Excel spreadsheet from a Resolver spreadsheet.For a longer overview of the features of Resolver, read Resolver: What and Why?. »)

http://www.voidspace.org.uk/python/weblog/arch_d7_2007_12_08.shtml#e897 (« The version released was 1.0 beta 4. This includes quite a few major changes since I last updated you about progress with Resolver. One of the major changes was that we made the API for working with spreadsheet objects simpler from user code. This was a lot of work, but I think it was worth it. The very worst side effect was that it broke most of my examples on the Resolver Hacks website. Today I have finally got around to updating it and putting new screenshots in (Resolver got prettier):

There are around thirty pages of articles and examples to get you going with Resolver. Some of the most useful ones are:

http://www.ironpython.info/index.php/Main_Page (« This wiki contains recipes and example code for IronPython. IronPython is a Microsoft port of the Python Programming Language to the .NET framework.

Python is a dynamic language, used for a wide variety of purposes, with an emphasis on clean and expressive code. It allows the maximum flexibility for the developer, whilst maintaining readability of code.« )

http://www.manning.com/foord/ («  IronPython in Action offers a comprehensive, hands-on introduction to Microsoft’s exciting new approach for programming the .NET framework. It approaches IronPython as a first class .NET language, fully integrated with the .NET environment, Visual Studio, and even the open-source Mono implementation. You’ll learn how IronPython can be embedded as a ready-made scripting language into C# and VB.NET programs, used for writing full applications or for web development with ASP. Even better, you’ll see how IronPython works in Silverlight for client-side web programming. IronPython opens up exciting new possibilities. Because it’s a dynamic language, it permits programming paradigms not easily available in VB and C#. In this book, authors Michael Foord and Christian Muirhead explore the world of functional programming, live introspection, dynamic typing and ‘duck typing’, metaprogramming, and more. IronPython in Action explores these topics with examples, making use of the Python interactive console to explore the .NET framework with live objects. The expert authors provide a complete introduction for programmers to both the Python language and the power of the .NET framework. The book also shows how to extend IronPython with C#, extending C# and VB.NET applications with Python, using IronPython with .NET 3.0 and Powershell, IronPython as a Windows scripting tool, and much more.« )

http://ironpython-urls.blogspot.com/2007/12/mono-boo-python-gnome-ironpython.html (« Mono, Boo, Python, Gnome & IronPython. Miguel de Icaza has a blog entry responding to an article on ‘Mono Usage in the Enterprise’:

It has some interesting comments on the role of Python in the Gnome project and IronPython and Boo on Mono: Python is indeed making great strides as a desktop development platform and am not sure that we are in the business of competing with it. If people like writing Python code, they should just keep writing python code. Myself, I like the IronPython variation of Python more. IronPython just happens to be JITed Python and in most tests it is faster than CPython. For the past year or so, we have also been in love with Boo, another .NET language. Boo has support for strong typing, so for certain scenarios you will get even better performing code (basically, when you can determine the type of a variable ahead of time, instead of having the variable be entierly late bound).« )


Produits, bibliothèques Python

http://wiki.secondlife.com/wiki/Eventlet (« Eventlet is a networking library written in Python. It achieves high scalability by using non-blocking io while at the same time retaining high programmer usability by using coroutines to make the non-blocking io operations appear blocking at the source code level.

Eventlet runs on Python version 2.3 or greater, with the following dependenceis:

  • greenlet
  • (if running python versions < 2.4) a deque object in a collections module. One option is to copy this deque into a file called collections.py.


Eventlet began life as Donovan Preston was talking to Bob Ippolito about coroutine-based non-blocking networking frameworks in Python. Most non-blocking frameworks require you to run the « main loop » in order to perform all network operations, but Donovan wondered if a library written using a trampolining style could get away with transparently running the main loop any time i/o was required, stopping the main loop once no more i/o was scheduled. Bob spent a few days during PyCon 2005 writing a proof-of-concept. He named it eventlet, after the coroutine implementation it used, greenlet. Donovan began using eventlet as a light-weight network library for his spare-time project Pavel, and also began writing some unittests.

When Donovan started at Linden Lab in May of 2006, he added eventlet as an svn external in the indra/lib/python directory, to be a dependency of the yet-to-be-named backbone project (at the time, it was named restserv). However, including eventlet as an svn external meant that any time the externally hosted project had hosting issues, Linden developers were not able to perform svn updates. Thus, the eventlet source was imported into the linden source tree at the same location, and became a fork. Bob Ippolito has ceased working on eventlet and has stated his desire for Linden to take it’s fork forward to the open source world as « the » eventlet.« )

http://www.artima.com/weblogs/viewpost.jsp?thread=217546 (« The Python Quick Reference has been the most excellent resource for many years, because it gives you an overview of the entire language and usually allows you to quickly find the solution you’re looking for. If it doesn’t, it has links directly into the Python documentation. Just so Richard Gruet and the others who work on the PQR know, you have lots of fans out there. Thanks for all your work…Before you fire up your comments, I continue to root for Ruby. I think it’s great that Sun is directly supporting it as the scripting language for the JVM (as far as I know none of the other languages are actually getting financial support). I am also attracted to the more dynamic features of the language like open classes and the like. As far as dynamic languages on the JVM, both Ruby and the upcoming new version of Jython seem to me to be the most attractive of the offerings.But to make Ruby easier, I suggest that Rubyists study from and plagiarize the PQR, and also learn from the « batteries included » approach in the Python standard libraries. Both of these are things that keep me going back to Python« )

Posted in 2007, DotNet, Ironpython, python, RAD, RIA, Web applications | Tagué: , | Leave a Comment »

Connexion entre composants Java et DotNet: Ikvm, boo, java, .NET, ironpython

Posted by patrick sur décembre 15, 2007

Source: http://ironpython-urls.blogspot.com/2007/11/boo-java-net-and-ironpython.html

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Thursday, November 15, 2007

Boo, Java, .NET and IronPython

A blogger called Tomo wondered about which .NET language to choose Boo (a mighty fine language) or IronPython. He came down in favour of Boo, and an interesting discussion ensued in the comments:

The very next thing he tried was taking the Java class library for SWT (the user interface library) and compiled them into a .NET dll with IKVM. He then used them from Boo and IronPython, which worked!

This is an interesting coincidence, as a few days ago Rodrigo announced on the Boo blog about boojay – a compiler that emits Java bytecode from Boo:

————————————————-8<———————————————

Source: http://blogs.codehaus.org/people/bamboo/archives/001623_introducing_boojay.html
(« A boo application using the SWT java GUI library. Thanks to IKVM that’s not only possible but very simple as well. So what’s the news? Well, Friday morning I was chatting with Klaus and he said to me « if you get boo to emit java bytecodes I’ll do all my stuff in boo ». How’s that for a challenge? 🙂 Thanks again to IKVM, ObjectWeb ASM and the extensible boo pipeline architecture boojay was born after a weekend of relaxed hacking « )

http://boo-extensions.googlecode.com/svn/trunk/boojay/ (« boojay is an attempt at getting the boo compiler to emit java bytecode. Architecture
Thanks to the amazing IKVM project it is possible to use the great ObjectWeb ASM library from boo running on mono/ms.net to emit native java bytecodes that can be executed by any compliant java virtual machine
« )

http://koans.tomo-online.com/2007/11/15/langage-frenzy/ (« Although I should be doing something else, Boo, IronPython and .NET kept occupying my mind. So I made a small coding experiment. First, I downloaded IKVM. Then – SWT. I compiled SWT jar to a dll. No problems here. Then I wrote a SWT hello world in IronPython. To be honest – I took a Java one from SWT website and rewrote line by line. I was surprised that my hello world ran without a glich! Next, I copied a HelloWorldSWT.py into HelloWorldSWT.boo and changed the import statement. Compiled (”By golly! No problems? No warnings?”) and run. And no problems again?? It started to look suspicious… Java run on .NET, calls from Java to native library, two different languages… and everything without a single warning? So I decided to take it to foreign territory… Ubuntu! I fired up a VMWare image with Ubuntu 6.10 (the linux vm I have handy), downloaded Linux SWT, compiled it to dll, copied HelloWorldSWT.exe from Windows along with some ikvm dlls and… no problems again! I’m really, really surprised how smooth the experiment was. Thumbs up! « )

http://en.wikipedia.org/wiki/IKVM (« IKVM.NET is an implementation of Java for Mono and the Microsoft .NET Framework. IKVM is free software, distributed under a permissive free software licence. IKVM includes the following components: for

  • A Java Virtual Machine implemented in .NET
  • A .NET implementation of the Java class libraries
  • Tools that enable Java and .NET interoperability

With IKVM you can run compiled Java code (bytecode) directly on Microsoft .NET or Mono. The bytecode is converted on the fly to CIL and executed. Jeroen Frijters is the main contributor to IKVM.NET. He is Technical Director of Sumatra Software, based in The Netherlands. As of June 2007, the machine supports Java 1.6 with the exception of AWT and Swing. IKVM uses OpenJDK as its class library. »)

http://www.ikvm.net/ (« ..The following projects are related to IKVM.NET in some way:

http://www.eclipse.org/swt/ (« SWT is an open source widget toolkit for Java designed to provide efficient, portable access to the user-interface facilities of the operating systems on which it is implemented.« )

http://www.gnu.org/software/classpath/classpath.html (« GNU Classpath, Essential Libraries for Java, is a GNU project to create free core class libraries for use with virtual machines and compilers for the java programming language. Classpath is still a work in progress. The first public release will be version 1.0. There have been no public releases; however, pre-release source code is available via GNU’s anonymous CVS server , and snapshots of the Classpath tree have been released and are available from ftp://ftp.gnu.org/gnu/classpath/« )

http://en.wikipedia.org/wiki/GNU_Classpath (« GNU Classpath is a project aiming to create a free software implementation of the standard class libraryJava programming language. Despite the massive size of the library to be created, the majority of the task is already done, including Swing, CORBA, and other major parts. The Classpath developers have implemented almost all of the classes from J2SE 1.4 and 5.0. Classpath can thus be used to run popular Java-based software such as Azureus and Eclipse. It is a part of the Free Software Foundation‘s GNU project and was launched so that computer users could use Java programs without giving up the freedoms which the free software movement works to secure. GNU Classpath was originally developed in parallel with libgcj due to license incompatibilities, but later merged...Since version 0.95, Java 1.5 additions like generics have been fully integrated into the main branch. The branch allows GCJ to use Eclipse compiler, ecj, to compile Java 1.5 source code to bytecode, which is then changed into native code by GCJ itself« )

http://en.wikipedia.org/wiki/Boo_programming_language (« Boo is an object oriented, statically typed programming language developed starting in 2003, which seeks to make use of the Common Language Infrastructure support for Unicode, internationalization and web style applications, while using a Python-inspired syntax and a special focus on language and compiler extensibility. Some features of note include type inference, generators, multimethods, optional duck typing, macros, true closures, currying, and first class functions. Boo is open sourcelicensed under an MIT/BSD style license.Boo can be used with Microsoft .NET or Mono. »)

https://pvergain.wordpress.com/2007/08/17/grasshopper-faire-tourner-des-applications-aspnet-sur-des-serveurs-j2ee/
(« Grasshopper 2.0 enables you to produce .NET Web and server applications that run on Linux & other Java-enabled platforms using ASP.NET 2.0 controls, role-based security, and C# generics. Check out our developer blogs, interop forums, code samples, and how-to articles to learn how« )

– http://blog.mainsoft.com/blog/net-java-interop-8-links-to-get-you-started/(« 

Posted in 2007, ASP.NET, Développement logiciel, DotNet, FSF, IDE-GUI, Ironpython, J2EE, java, JEE, python | Tagué: , , , | Leave a Comment »

Les nouveautés dans ASP.NET Extensions: ASP.NET MVC et ASP.NET AJAX

Posted by patrick sur décembre 15, 2007

Comme le précise ce billet http://dosimple.ch/articles/MVC-ASP.NET/ écrit le 2 mai 2006 et celui-ci écrit le 13 mars 2007, le framework ASP.NET n’incite pas particulièrement à la séparation stricte de type Modèle, Vue, Contrôleur. On a vu que Monorail, projet open source, implémente le modèle MVC. Microsoft emboite le pas avec un grand retard en introduisant ASP.NET MVC: voir le billet suivant: http://weblogs.asp.net/scottgu/archive/2007/10/14/asp-net-mvc-framework.aspx (« One of the things that many people have asked for over the years with ASP.NET is built-in support for developing web applications using a model-view-controller (MVC) based architecture. Last weekend at the Alt.NET conference in Austin I gave the first public demonstration of a new ASP.NET MVC framework that my team has been working on. You can watch a video of my presentation about it on Scott Hanselman’s blog here.

What is a Model View Controller (MVC) Framework?

MVC is a framework methodology that divides an application’s implementation into three component roles: models, views, and controllers.

  • « Models » in a MVC based application are the components of the application that are responsible for maintaining state. Often this state is persisted inside a database (for example: we might have a Product class that is used to represent order data from the Products table inside SQL).

  • « Views » in a MVC based application are the components responsible for displaying the application’s user interface. Typically this UI is created off of the model data (for example: we might create an Product « Edit » view that surfaces textboxes, dropdowns and checkboxes based on the current state of a Product object).

  • « Controllers » in a MVC based application are the components responsible for handling end user interaction, manipulating the model, and ultimately choosing a view to render to display UI. In a MVC application the view is only about displaying information – it is the controller that handles and responds to user input and interaction.

One of the benefits of using a MVC methodology is that it helps enforce a clean separation of concerns between the models, views and controllers within an application. Maintaining a clean separation of concerns makes the testing of applications much easier, since the contract between different application components are more clearly defined and articulated.

The MVC pattern can also help enable red/green test driven development (TDD) – where you implement automated unit tests, which define and verify the requirements of new code, first before you actually write the code itself.

A few quick details about the ASP.NET MVC Framework

I’ll be doing some in-depth tutorial posts about the new ASP.NET MVC framework in a few weeks once the bits are available for download (in the meantime the best way to learn more is to watch the video of my Alt.net presentation).

A few quick details to share in the meantime about the ASP.NET MVC framework:

  • It enables clean separation of concerns, testability, and TDD by default. All core contracts within the MVC framework are interface based and easily mockable (it includes interface based IHttpRequest/IHttpResponse intrinsics). You can unit test the application without having to run the Controllers within an ASP.NET process (making unit testing fast). You can use any unit testing framework you want to-do this testing (including NUnit, MBUnit, MS Test, etc).

  • It is highly extensible and pluggable. Everything in the MVC framework is designed so that it can be easily replaced/customized (for example: you can optionally plug-in your own view engine, routing policy, parameter serialization, etc). It also supports using existing dependency injection and IOC container models (Windsor, Spring.Net, NHibernate, etc).

  • It includes a very powerful URL mapping component that enables you to build applications with clean URLs. URLs do not need to have extensions within them, and are designed to easily support SEO and REST-friendly naming patterns. For example, I could easily map the /products/edit/4 URL to the « Edit » action of the ProductsController class in my project above, or map the /Blogs/scottgu/10-10-2007/SomeTopic/ URL to a « DisplayPost » action of a BlogEngineController class.

  • The MVC framework supports using the existing ASP.NET .ASPX, .ASCX, and .Master markup files as « view templates » (meaning you can easily use existing ASP.NET features like nested master pages, <%= %> snippets, declarative server controls, templates, data-binding, localization, etc). It does not, however, use the existing post-back model for interactions back to the server. Instead, you’ll route all end-user interactions to a Controller class instead – which helps ensure clean separation of concerns and testability (it also means no viewstate or page lifecycle with MVC based views).

  • The ASP.NET MVC framework fully supports existing ASP.NET features like forms/windows authentication, URL authorization, membership/roles, output and data caching, session/profile state management, health monitoring, configuration system, the provider architecture, etc. »)

A voir:

  • https://pvergain.wordpress.com/2007/03/13/critique-de-larchitecture-aspnet/ (« Le problème avec ASP. Net est qu’il n’y a qu’un objet qui traite les demandes http, c’est l’objet PAGE. C’est lui qui a le contrôle de tout, et donc il mélange le code dit de «contrôle», et le code qui pilote la «visualisation» des éléments en html. Et bien souvent, on mélange aussi le code qui pilote le «Modèle» c’est à dire l’obtention des données directement depuis la base de données avec Ado.Net (c’est ce qu’on obtient lorsqu’on fait du WYSIWYG dans Visual Studio en choisissant les Sql Data Source et les glissant-déposant sur l’ihm). Cet anti-modèle (ou anti–pattern) a été souvent pointé du doigt par les architectes et développeurs, car en plus de faire produire du code spaghetti (bien que orienté objet), il rend impossible les tests systématisés (automatisés).« )
  • http://dosimple.ch/articles/MVC-ASP.NET/ (« Dans le framework ASP.NET la vue est un fichier HTML agrémenté de balises ASP. Le contrôleur et le modèle sont en général mélangés dans un objet qui dérive de la classe System.Web.UI.Page. »)
  • http://www.castleproject.org/monorail/index.html (« MonoRail is a MVC Web Framework inspired by Action Pack. MonoRail differs from the standard WebForms way of development as it enforces separation of concerns; controllers just handle application flow, models represent the data, and the view is just concerned about presentation logic. Consequently, you write less code and end up with a more maintainable application. Although the project name is MonoRail, we do not have any affiliation with the Mono project. MonoRail runs on Microsoft .Net 1.1, 2.0 and Mono.« )
  • http://en.wikipedia.org/wiki/ASP.NET_MVC_Framework (« ASP.NET MVC Framework is a Model-view-controller framework which Microsoft is adding to ASP.NET. It allows an application to be built as a composition of three roles: Model, View and Controller. A Model represents the state of a particular aspect in the application. Frequently, a model maps to a database table, with the entries in the table representing the state of the table. A Controller handles interactions and updates the model to reflect a change in state of the application. A View ASP.NET MVC Framework couples the models, views and controllers using interface-based contracts, thereby allowing each component to be easily tested independently. The view engine in the MVC framework uses regular .aspx pages to design the layout of the UI pages onto which the data is composed; however any interactions are routed to the controllers rather than using the postback mechanism. Views can be mapped to REST-friendly URLs. ASP.NET MVC Framework has been launched as a Community Technology Preview on December 10, 2007 extracts necessary information from a model and renders a UI to display that.. »)
  • http://www.hanselman.com/blog/ScottGuMVCPresentationAndScottHaScreencastFromALTNETConference.aspx ( » I attended the ALT.NET Conference last weekend in Austin, TX. I personally find the name « Alt » as in « Alternative » too polarizing and prefer terms like « Pragmatic.NET » or « Agile.NET. » At the conference I suggested, partially in jest, that we call it « NIH.NET » as in « Not Invented Here.NET. » 😉 Ultimately this is a group that believes in:
    • Continuous Learning
    • Being Open to Open Source Solutions
    • Challenging the Status Quo
    • Good Software Practices
    • DRY (Don’t Repeat Yourself)
    • Common Sense when possible.

    ScottGu gave an hour long presentation on the upcoming MVC Framework and I took some guerilla video. ScottGu’s presentation is here in Silverlight and it’s about 60 minutes long. Considering it’s so long, the video squished nicely. This was the first time the MVC Framework was shown publicly. Note that this was a Prototype, not the Production code and both ScottGu and I make that point a number of times to drive home that it’s early. Some of the code was written on a plane, just to give you an idea. After The Gu did his piece on the MVC Framework, I showed some prototype hacking that I’d done over the previous few days along with some work Phil Haack did. My presentation is here as Silverlight and it’s about 30 minutes long. I showed the Model View Controller with Controllers in IronPython and an IronPython view using a WebFormViewEngine. Then I talked about the possibilities of alternate ViewEngines and showed Phil Haack’s prototype RubyViewEngine. »)

  • http://weblogs.asp.net/scottgu/archive/2007/11/13/asp-net-mvc-framework-part-1.aspx ( » ASP.NET MVC Framework (Part 1) I’m going to use a simple e-commerce store application to help illustrate how the ASP.NET MVC Framework works. For today’s post I’ll be implementing a product listing/browsing scenario in it. Specifically, we are going to build a store-front that enables end-users to browse a list of product categories when they visit the /Products/Categories URL on the site>>Since it adds a testing project, does this require Team System? No – the good news is that Test Projects with VS 2008 are now supported with the VS 2008 Professional edition – and no longer require team system. You will also be able to use the VS Express and Standard edition products as well, and then use NUnit, MBUnit or some other testing framework with them (we’ll ship project templates for these as well…>> 2. Is it also possible to have this URL mapped: /Products/Beverages/3 instead of /Products/Beverages?page=3 or does it _need_ the parameter name? Yes – this is totally supported. Just set a route rule for /Products/Beverages with the format /Products/<Category>/<Page> – they’ll then get passed in as arguments to the action method:public List(string category, int? page) {}>>Also, some ideas and general remarks: 1. I’d love to see more helper methods for use in the views, I like how Ruby on Rails has many shortcuts for creating forms and formfields etc. Yes – we’ll have a rich library of helper methods for the views. They’ll include helpers to create all the standard forms, formfields and more.

>>2. Migrations! Not a part of MVC but from my experience with Ruby on Rails I would love to see support for this somewhere, anywhere! It would fit perfectly with the more agile way of developing that is possible with ASP.NET MVC. Rob Conery is building .NET Migrations support as part of the SubSonic project, and recently joined Microsoft. You’ll be able to use this with ASP.NET MVC

>>I’m also very keen to get my hands on the CTP. Scott, you mention, using Inversion of Control containers with the MVC framework. I’d be very interested in seeing a blog post on this subject. Also, will there be a sample application (with tests and IoC) available alonside the CTP? We have a IControllerFactory extensiblity point that owns creating Controller instances. You can use this with a IOC container to customize any Controller instance prior to it being called by the MVC framework. We’ll be posting samples of how to use this with ObjectBuilder and Windsor with the first CTP I believe

>> Very cool! One thing I’d like to see guidance on is developing MVC apps with multiple UIs. You say here that it’s best to put your models and controllers in the web app, but say we want a Winforms, WPF, Silverlight, and Web UI all doing similar things. Or a Mobile Web UI and Desktop Web UI… Would these still each need their own Models and Controllers, or does it make sense to have one library that they all share? If so, how is that supported? I’m still new to MVC, so if I’m missing something conceptually here, tell me! That is a good question, and one we’ll need to provide more guidance on in the future. In general it is often hard to share the same controller across both client and web UI, since the way you do data access and the stateful/stateless boundaries end up being very different. It is possible – but some guidance here would ceretainly be useful. My team should hopefully be coming out with this in the future

>>I really appreciate this material. Do you support the MVC pattern over the MVP pattern? Or are there just better scenarios for using each? The above approach I showed uses a MVC based pattern – where the Controller and the View tend to be more separate and more loosly coupled. In a MVP pattern you typically drive the UI via interfaces. This works well with a controls model, and makes a lot of sense with both WinForms and WebForms where you are using a postback model. Both MVC and MVP are perfectly fine approaches to use. We are coming out with the MVC approach for ASP.NET partly because we’ve seen more demand for it recently for web scenarios…

>> When can we expect a similar chapter with SubSonic as the DAL and scaffolding provider? (see http://oakleafblog.blogspot.com/2007/11subsonic-will-be-toolset-for-microsofts.html I’ll be covering scaffolding in a future blog post. LINQ to SQL scaffolding is built-in with ASP.NET MVC and doesn’t require SubSonic. SubSonic will also obviously be adding new ASP.NET MVC features as well.

>> My applications in .NET works with « 3 layers » pattern (business logic and data access in your own dll). How can i use this wonderfull MVC with my Models (data access) and Controllers (B.Logic)?? Because if i’m not reuse this, i’ve repeat code in every layer; then this MVC is not DRY (don’t repeat yourself) and the community don’t accept. There is no need to put your business and data logic in the same assembly as your controllers. You can split them up across multiple class library projects if you prefer

>> Does this mean that with MVC, we no longer use LinqDatasource in the View section? While the LinqDataSource control will technically work in MVC Views, if you are using a MVC model you wouldn’t want to place it there. Instead you want to perform all of your data and application logic in the Controller layer – and then pass the needed data to the view.

>> Perhaps I missed it somehow, but can you explain on which version of asp.net will this ctp run? The MVC framework builds on top of .NET 3.5

>> Scott, this is amazing timing! The URL mapping features inherit in an MVC application are PERFECT for the upgrade to ASP.NET 3.5 I’m making to my spelldamage.com site. Hosting question, will hosts simply need to support the ASP.NET 3.5 framework to allow us to run ASP.NET MVC applications? Your hoster will need to support .NET 3.5 for the MVC support.

>> Is’nt the MVC framework, in fact the Controller, implementation of the Front Controller pattern? Yes – the ASP.NET MVC framework uses a front-controller pattern. »)

  • http://weblogs.asp.net/scottgu/archive/2007/12/03/asp-net-mvc-framework-part-2-url-routing.aspx (« Last month I blogged the first in a series of posts I’m going to write that cover the new ASP.NET MVC Framework we are working on. The first post in this series built a simple e-commerce product listing/browsing scenario. It covered the high-level concepts behind MVC, and demonstrated how to create a new ASP.NET MVC project from scratch to implement and test this e-commerce product listing functionality. In today’s blog post I’m going to drill deeper into the routing architecture of the ASP.NET MVC Framework, and discuss some of the cool ways you can use it for more advanced scenarios in your application… What does the ASP.NET MVC URL Routing System do? The ASP.NET MVC framework includes a flexible URL routing system that enables you to define URL mapping rules within your applications. The routing system has two main purposes:
    • Map incoming URLs to the application and route them so that the right Controller and Action method executes to process them
    • Construct outgoing URLs that can be used to call back to Controllers/Actions (for example: form posts, <a href= » »> links, and AJAX calls)

Having the ability to use URL mapping rules to handle both incoming and outgoing URL scenarios adds a lot of flexibility to application code. It means that if we want to later change the URL structure of our application (for example: rename /Products to /Catalog), we could do so by modifying one set of mapping rules at the application level – and not require changing any code within our Controllers or View templates.

>> BTW, can you explain in short about the Active Record Type support in our MVC.

.NET 3.5 has LINQ to SQL built-in – which is a great ORM. LINQ to Entities will also be built-into .NET 3.5 in the future (it also ships with the MVC setup). The MVC framework doesn’t require LINQ to SQL or LINQ to Entities as the data model – it also works with NHibernate, LLBLGen, SubSonic, DataSets, DataReaders, and/or any other data model with .NET. We will, though, provide out of the box scaffolding support for LINQ to SQL and LINQ to Entities that delivers nice integration with the MVC support.

>> Question : What is this MockHttpContext in the UnitTest class? I mean, i can guess what it is .. but is it new in .NET 3.5 or the MVC framework? The MockHttpContext is an example mock object. It isn’t currently built-in with the MVC framework (with the first preview you’d need to create this yourself). I’m hoping that before the MVC framework ships, though, that there are a built-in set of mock objects and test helpers that you can use out of the box (without having to mock them yourself). Note that all core contracts and types with the MVC framework are mockable (non-sealed and interfaces). So you can also use any existing Mock framework to test it (RhinoMocks, TypeMock, etc).

>> 1) Is it possible to use routes with a file extension if I don’t want to enable wildcard script mappings? For example, /Products/List/Beverages.rails or /Products/Detail/34.rails ? Yes – this is fully supported. We recommend changing your route rule to /[controller].mvc/[action]/[id]. When you install the ASP.NET MVC Framework we automatically register this .mvc extension – although you are free to use any other one you want.

>> Hypothetically, do you think it would be possible to customise the route creation process so that route data could be gathered from attributes on actions? We don’t currently support this built-in, but hypothetically you could load all the controllers at app-startup and use reflection on them to calculate the route rules. This would enable the scenario you are after.

>> Is it possible to use IronRuby as the coding language to target the MVC framework?? Yes – we’ll support both IronRuby and IronPython with the ASP.NET MVC Framework.

>> I am liking this more and more. I can see how the routing configuration code in global.asax.cs could become quite large. In my application, I can see dozens, maybe hundreds of unique routing rules. Is there any way this configuration can be put in a file somewhere? That file would be read on Application start. Seems like that would make deployment of routing changes easier, too. We don’t currently have a pre-built file format for reading in mapping rules. But it should be relatively easy to build (you could even use LINQ to XML to read in and construct the rules).

>> Just out of curiosity where in the HttpApplication cycle are the routing rules evaluated and are they exposed in any way to the rest of the HttpApplication cycle? My current security system grants permissions at what would become the controller-action level so if the route determination is made early enough I’d really like to drive my authorization off of it.
The routing rules are resolved after the OnPostMapRequestRequestHandler event. This means that it will happen *after* your authorization rules evaluate. The good news is that this means you should be able to re-use your existing security system as-is.

>> Will there be any way to use an XML document to create the routing rules outside of the Global.asax code? Yep – this scenario will be supported.

>> I noticed that in Django, you have to repeat yourself kind of often when you have a deep nested hierarchy of pages. Your search & search-results pages seem to be continuing that trend. I’m sure I could come up with some hierarchical data structure which can be serialized into Route objects, but is the ASP.NET team planning anything along those lines that would come stock?

With our first preview the Route type is not extensible (you can’t subclass it) – which means you sometimes need to register multiple routes for a series of things. For the next preview we are looking at enabling Route to be sub-classed – in which case you could easily encapsulate multiple URL mappings into a single registration.

>> Have you thought about being able to define a regular expression for url matching and using backreferences or named captures as the tokenized url? I think this would allow for much more flexibility while keeping the list of routing rules down to a minimum.

Yes – this is something we are looking at. The challange with regular expressions is that only a subset of people really understand them (and importantly – understand how to optimize them). But I agree that having this as an option would be super flexible.

>> I must say that i am still worried about having to leave all the knowledge that we ave until now with webforms and start a new technology and still think that we would need some kind of a bridge to close the gap between today solution of webforms and tomorrow solution of MVC. Although the way you structure application flow will be different, I think you’ll be pleasantly surprised by the amount of knowledge overlap that exists. Authentication, Authorization, Caching, Configuration, Compilation, Session State, Profile Management, Health Monitoring, Administration, Deployment, and many, many other things are exactly the same. MVC views are also .aspx pages (that use .ascx user controls and .master files). So the concept re-use is quite heavy there as well. »)

  • http://weblogs.asp.net/scottgu/archive/2007/12/06/asp-net-mvc-framework-part-3-passing-viewdata-from-controllers-to-views.aspx (« The last few weeks I have been working on a series of blog posts that cover the new ASP.NET MVC Framework we are working on. The ASP.NET MVC Framework is an optional approach you can use to structure your ASP.NET web applications to have a clear separation of concerns, and make it easier to unit test your code and support a TDD workflow. The first post in this series built a simple e-commerce product listing/browsing site. It covered the high-level concepts behind MVC, and demonstrated how to create a new ASP.NET MVC project from scratch to implement and test this e-commerce product listing functionality. The second post in this series drilled deep into the URL routing architecture of the ASP.NET MVC framework, and discussed both how it worked as well as how you can handle more advanced URL routing scenarios with it. In today’s blog post I’m going to discuss how Controllers interact with Views, and specifically cover ways you can pass data from a Controller to a View in order to render a response back to a client. In Part 1 of this series, we created an e-commerce site that implemented basic product listing/browsing support. We implemented this site using the ASP.NET MVC Framework, which led us to naturally structure the code into distinct controller, model and view components. When a browser sends a HTTP request to our web site, the ASP.NET MVC Framework will use its URL routing engine to map the incoming request to an action method on a controller class to process it. Controllers in a MVC based application are responsible for processing incoming requests, handling user input and interactions, and executing application logic based on them (retrieving and updating model data stored in a database, etc). When it comes time to render an HTML response back to the client, controllers typically work with « view » components – which are implemented as separate classes/templates from the controllers, and are intended to be focused entirely on encapsulating presentation logic. Views should not contain any application logic or database retrieval code, instead all application/data logic should only be handled by the controller class. The motivation behind this partitioning is to help enforce a clear separation of your application/data logic from your UI generation code. This makes it easier to unit test your application/data logic in isolation from your UI rendering logic.Views should only render their output using the view-specific data passed to it by the Controller class. In the ASP.NET MVC Framework we call this view-specific data « ViewData ». The rest of this blog post is going to cover some of the different approaches you can use to pass this « ViewData » from the Controller to the View to render.

>> One question Scott: Let say i’m jumpng on MS MVC bandwagon, do i have to abandon asp.net Page Life cycle godddies, should i set up my mind to different approach. When you use the ASP.NET MVC approach you’ll want to have all post in your site go to your Controller. This helps ensure that the application can be easily tested and preserves the separation of concerns. This is different from using ASP.NET server controls which postback to themselves (which is very powerful too – but means that it can sometimes be slightly harder to test). What doesn’t change is that all of other ASP.NET pieces (forms authentication, role management, session state, caching, profiles, configuration, compilation, httprequest/response, health monitoring, etc, etc) works with both web forms based pages and MVC based pages. MVC UI are also built with .aspx, .master, and .ascx files – so there is a high level of skill re-use there as well.

>> Some asp.net controls require <form runat=server>. If we use a asp:dropdownlist for example, we have to place in the asp:form. And this means viewstate comes back! Is there any way to get rid of hidden form fields? Or you suggest that we do must use classic HTML controls ? I’ll cover this more in my next blog in this series. We have helpers that can automate generating things like dropdownlists, etc. Think of them as controls for MVC. These don’t use viewstate and give you a little more control over the output of your HTML.

>> It would be nice if you can just compare a bit our MVC with ROR. Within ROR, we can create tables, Columns and Rows with Ruby, without using a single line of SQL, and all its done through ActiveRecord. In short all CRUD advantages.

>> SubSonic is almost in this line. Can you explain more in this line or how SubSonic can be used to take ActiveRecord Type advantages.

RoR is made up of several components.

« Action Controller » is the name of the MVC framework that Rails uses. That is the closest analogy to the ASP.NET MVC Framework – and at a high-level the ASP.NET MVC framework uses many of the same core concepts (URLs map to controller actions). The ASP.NET MVC Framework has a few additional features (like the ability to map incoming parameters directly to action method parameters). It is also more explicit about calling RenderView within the request.

« Active View » is the name of the View engine that Rails uses. This is analagous to the .aspx/.master/.ascx infrastructure ASP.NET has. Our view engine is IMO a little richer, and supports several additional features (declarative controls/components, templating, multiple regions for nested master pages, WYSIWYG designer, strongly typed ViewData access, pluggable storage provider, declarative localization, etc).

« Active Record » is the name of the ORM (object relational mapper) that RoR uses. This is analagous to an ORM in the .NET world – whether it is LINQ to SQL, LINQ to Entities, LLBLGen, SubSonic, NHibernate, ActiveRecord (the .NET version), etc. All of these ORMs have ways to map rows and columns in a database to objects that a developer then manipulates and works against (and can save changes back). The LINQ to SQL ORM is built-in to .NET 3.5 today, and LINQ to Entities will be built-in with .NET 3.5 SP1.

I think from your follow-up question above you are referring specifically to the « migrations » feature in RoR – which allows you to define table schemas using code, and version the schemas forward/backward. There isn’t a built-in version of this in the core .NET Framework today – although the SubSonic project has recently released a version that allows you to-do this using .NET. You can find out more about it here: www.subsonicproject.com.

>> Superb, …but I still longing for the IOC integration (Spring.NET, Windsor, StructureMap)…maybe in the next post ? I am planning on posting about IOC and dependency injection in the future (the ASP.NET MVC framework fully supports it and can be used with Spring.NET, Windsor, StructureMap, etc). I have a few other more basic MVC tutorials I need to get out of the way first – but testing and dependency injection are on the list for the future.

>> Nice series, eagerly waiting to see AJAX approach in the new ASP.NET MVC Framework, so when shall we expext that.
We will have ASP.NET AJAX support with the ASP.NET MVC Framework. I’ll talk more about this in a future tutorial series post.

>> This is coming together nicely. I was just hoping you might explain why there are 3 different ways to pass the ViewData? Does each method offer something that the others don’t? If not, surely it would be best to choose one method and force all developers to follow the same practice? Conceptually there are two ways to pass viewdata – either as a dictionary, or as a strongly typed object. In general I recommend using the strongly typed dictionary approach – since this gives you better compilation checking, intellisense, and refactoring support. There are, however, some times when having a more latebound dictionary approach ends up being flexible for more dynamic scenarios« )

  • http://blog.wekeroad.com/2007/10/26/microsoft-subsonic-and-me/ (« Rather than try and come up with some lame metaphors and trite pop-culture references, I’ve decided to use some advice from English 101 Professor:

    “Whatever the hell you’re trying to say, just say it”

    So I will: I’m going to work for Microsoft. I just signed the offer letter. I’ll be working with the ASP.NET guys on the new MVC platform as well as some other groovy things like Silverlight. I get to work “across the hall” from one of my very good friends – Phil Haack. I think it’s worth pointing out that SubSonic hasn’t been “bought”. Some might smell a conspiracy here, but I’ll leave that to the X-Files and Cap’n Crunch crowd to drum up all the evil reasons why the mothership has “beamed me up”. SubSonic will remain under the same MPL 1.1 license it always has, and will remain as completely Open Source as it always has – nothing will change at all. I’m just getting paid, essentially, to work on it 🙂...This is crucial to me. I decided to be direct with him and make sure we both understood these important points:

    “I want to be sure I have complete creative control over SubSonic, and that you don’t censor my blog… is that cool?”

    Shawn’s response is why I took the job:

    “Well Duh…” (he added some more things that were a bit more eloquent than “duh” – but I don’t think I was listening).

    I can make jokes about the UAC on my blog? And make up fictional Matrix converstations with ScottGu? Sign me up! I start on November 12th, right after DevConnections in Vegas (come on by if you’re out that way at the DNN Open Force« )

  • http://www.subsonicproject.com/ (« A Super High-fidelity Batman Utility Belt. SubSonic works up your DAL for you, throws in some much-needed utility functions, and generally speeds along your dev cycle. Why SubSonic ? Because you need to spend more time with your friends, family, dog, bird, cat… whatever. You work too much. Coding doesn’t need to be complicated and time-consuming. »)
  • http://en.wikipedia.org/wiki/Test-driven_development (« Test-Driven Development (TDD) is a software development technique consisting of short iterations where new test cases covering the desired improvement or new functionality are written first, then the production code necessary to pass the tests is implemented, and finally the software is refactored to accommodate changes. The availability of tests before actual development ensures rapid feedback after any change. Practitioners emphasize that test-driven development is a method of designing software, not merely a method of testing. Test-Driven Development began to receive publicity in the early twenty-first century as an aspect of Extreme Programming, but more recently is creating more general interest in its own right. Along with other techniques, the concept can also be applied to the improvement and removal of software defects from legacy code that was not developed in this way . »)
  • ss
  • http://weblogs.asp.net/scottgu/archive/2007/12/09/asp-net-mvc-framework-part-4-handling-form-edit-and-post-scenarios.aspx
  • (« ASP.NET MVC Framework (Part 4): Handling Form Edit and Post Scenarios   The last few weeks I have been working on a series of blog posts that cover the new ASP.NET MVC Framework we are working on.  The ASP.NET MVC Framework is an optional approach you can use to structure your ASP.NET web applications to have a clear separation of concerns, and make it easier to unit test your code and support a TDD workflow. The first post in this series built a simple e-commerce product listing/browsing site.  It covered the high-level concepts behind MVC, and demonstrated how to create a new ASP.NET MVC project from scratch to implement and test this e-commerce product listing functionality.  The second post drilled deep into the URL routing architecture of the ASP.NET MVC framework, and discussed both how it worked as well asthird post discussed how Controllers interact with Views, and specifically covered ways you can pass view data from a Controller to a View in order to render a response back to a client.  In today’s blog post I’m going to discuss approaches you can use to handle form input and post scenarios using the MVC framework, as well as talk about some of the HTML Helper extension methods you can use with it to make data editing scenarios easierClick here to download the source code for the completed application we are going to build below to explain these concepts… Our Data Model. We are going to use the SQL Server Northwind Sample Database to store our data.  We’ll then use the LINQ to SQL object relational mapper (ORM) built-into .NET 3.5 to model the Product, Category, and Supplier objects that represent rows in our database tables. We’ll begin by right-clicking on our /Models sub-folder in our ASP.NET MVC project, and select « Add New Item » -> « LINQ to SQL Classes » to bring up the LINQ to SQL ORM designer and model our data objects…To learn more about LINQ and LINQ to SQL, please check out my LINQ to SQL series here The HtmlHelper object (as well as the AjaxHelper object – which we’ll talk about in a later tutorial) have been specifically designed to be easily extended using « Extension Methods » – which is a new language feature of VB and C# in the VS 2008 release.  What this means is that anyone can create their own custom helper methods for these how you can handle more advanced URL routing scenarios with it.  The objects and share them for you to use. We’ll have dozens of built-in HTML and AJAX helper methods in future previews of the ASP.NET MVC Framework.  In the first preview release only the « ActionLink » method is built-into System.Web.Extensions (the assembly where the core ASP.NET MVC framework is currently implemented).  We do, though, also have a separate « MVCToolkit » download that you can add to your project to obtain dozens more helper methods that you can use with the first preview release.
  • >> This is nice. But do you handle subcomponents? subviews? Is view reuse possible inside other view? This is very important for even for modest sized applications? How would you handle posts correcly inside of subviews 😉 ?The first public MVC preview doesn’t have the concept of SubControllers yet (where you can attach them for regions of a larger view).  That is something we have planned for to tackle soon though.

    >> However, liviu raises good questions about Sub-Controllers, Composite Views and AJAX scenarios. How Will the MVC framework address the complex wiring of different parts of a page to different controllers for async updates?? My brain hurts thinking about it, yet I have implement these portal pages all the time cos our customers demand it. The first ASP.NET MVC Preview allows you to call RenderView (for example: RenderView(« Edit »)) and have it apply to either a .aspx viewpage or a .ascx viewusercontrol.  This ends up being really useful for scenarios where you are doing AJAX callbacks and want to refresh a portion of a page.  These callbacks could either be to the same Controller that rendered the origional page, or to another Controller in the project. We don’t have all the AJAX helper methods yet for this – but you could roll them yourself today.  We’ll obviously be releasing an update that does include them in the future.

  • >> Can you provide an example of how we might use a server side control to generate the drop down list or a textbox (a la WebForms) along with the pro’s and con’s of each approach? Personally, I do not like the old ASP <%= … %> syntax; but if there is a good reason to use it then I am willing to change that opinion. The main reason I showed the <% %> syntax in this post was that we don’t have the server-side MVC control equivalents available yet for this dropdown and text scenario.  That is on our roadmap to-do though – at which point you don’t need to necessarily use the <% %> syntax. In general what we’ve found is that some developers hate the <% %> syntax, while others prefer it (and feel that controls get in the way).  We want to make both sets of developers happy, and will have options for both. 🙂
  • >> Great work on the MVC model, it is a clean and intuitive model that appears to scale well. My only recommendation is that your actions (verbs) appear after the ids (nouns), e.g. [Controller]/[Id]/[Action]/  That would keep the architecture noun focused, opposed to verb focused. With this approach you can easily build an administrative interface on a public read-only site by adding verbs such as /edit/ or /delete/ at the end of your URL. A simple security rule can be added to the Controller that says ignore all Verbs after a noun, such as category or product, if user is not part of an administrative group. Thanks for the suggestion Josh.  You can do this today by creating your own custom route registration.  In the next preview I believe Route will be extensible so that you could also create a single resource route that supports these semantics.>> I was wondering if we could get an idea of the official « roadmap » for asp.net mvc?  Specifically, I’d like to know what features the team plans to release on what dates … ultimately, when this thing will RTM.  As I’ll be evaluating mvc and monorail for an upcoming app, this kind of information would really be helpful in determining which direction to go. We don’t have a formally published roadmap just yet – we will hopefully publish one early next year though.« )
  • http://en.wikipedia.org/wiki/ASP.NET_AJAX (« ASP.NET AJAX, formerly code-named Atlas, is a set of extensions to ASP.NET developed by Microsoft for implementing Ajax functionality. Including both client-side and server-side components, ASP.NET AJAX allows the developer to create web applications in ASP.NET 2.0 (and to a limited extent in other environments) which can update data on the web page without a complete reload of the page. The key technology which enables this functionality is the XMLHttpRequest object, along with Javascript and DHTML. ASP.NET AJAX was released as a standalone extension to ASP.NET in January 2007 after a lengthy period of beta-testing. It was subsequently included with version 3.5 of the .NET Framework, which was released alongside Visual Studio 2008 in November 2007.« )

Posted in 2007, Acces aux données, active record, AJAX, Architecture logicielle, ASP.NET, Développement logiciel, design pattern, DotNet, IDE-GUI, Ironpython, javascript, open source, ORM, RIA, ruby, tests, Web Frameworks | Tagué: , , , , , , , | Leave a Comment »

Rich Internet Application : JavaFX,Adobe/Flex,Silverlight,Moonlight…

Posted by patrick sur novembre 4, 2007

Comme d’habitude un point d’entrée pour savoir ce qu’est une application RIA est l’article de Wikipedia:

RIAs typically:

Le numéro 102 de Programmez! consacre une bonne partie de ses articles à Rich Internet Application.

Comme c’est un monde en pleine effervescence on ne fera qu’énumérer les techniques en cours de développement (voir Articles p.32, p.36). Les principales solutions techniques pour faire des « clients riches »:

  • les frameworks Javascript (« Dojo, jQuery, Prototype/Script.aculo.us, Yahoo UI »)
  • JavaServer Faces (JSF): p.32 H. Darmet « ..avec une extension AJAX (comme a4jsf ou ICEFaces) est la solution reine de type « Ajax Hybride » dans le monde Java. Avantages: productivité (avec Seam), ubiquité, sécurité et robustesse…Prise en compte de l’existant que s’il est JSF »
  • Google Web Toolkit (GWT): « …solution de type Ajax total qui favorise les aspects performance, ubiquité, robustesse et sécurité grâce à un ingénieux système de développement en Java… »
  • ASP.NET AJAX (« …proche de JSF avec une extension AJAX. Solution remarquablement outillée par Visual Studio. La prise en compte d’un existant ASP.NET est très aisée.« )
  • Flex(Adobe) : …est la solution de type « applet like » la plus populaire (on estime aux alentours de 97% le nombre de machines équipées du Flash Player), ce qui rend par conséquent les applications Flex relativement multi plates-formes et facilement déployables). Elle en a tous les avantages qui sont les mêmes que celles d’une architecture « Ajax total ». Voir http://planete-accessibilite.com/#article_pa_2
  • Silverlight / Moonlight (« …la solution « applet like » du monde .NET…Elle reprend le principe de construction déclarative de l’IHM popularisé par Flex. L’ubiquité est encore assez limitée. L’outillage avec Visual Studio reste le point fort. »)
  • JavaFX (« ..est la solution « applet-like » du monde Java. Les avantages et limites sont ceux rencontrés par Silverlight, avec moins de crédibilité et de maturité…page 45. « …JavaFX est un produit finalement mal connu: il est présenté comme une solution RIA, mais c’est en fait une nouvelle solution pour construire des applications Swing qu’elles soient RIA ou non. L’intérêt de JavaFX est donc à la fois ailleurs et plus large…toute équipe qui développe une application graphique basée sur swing devrait s’intéresser à JavaFX… »)
  • OpenLaszlo est une plateforme de développement d’applications riches, en open source. Ses applications sont développées via une solution qui produit, à partir du même code source, une application en DHTML (HTML, DOM, CSS et Javascript) ou Flash.
  • XUL/XULRunner (« XUL, pour XML-based User interface Language, est un langage de description d’interfaces graphiques basé sur XML créé dans le cadre du projet Mozilla. XUL se prononce zoul en anglais (pour rimer avec cool, mais aussi en hommage au demi-dieu Zoul dans le film S.O.S. Fantômes). Couplé avec le XULRunner, environnement d’exécution multiplateforme, il forme un couple permettant de créer des Rich Desktop Application« )

Autres sources:

Posted in AJAX, DotNet, IDE-GUI, java, RIA, Web applications | Tagué: , , , , , , , , , , , , , , , , , , | 1 Comment »

Le futur proche de DotNet: Mono, VisualStudio 2008, C#3, ..NET3.5, Ironpython2.0, LINQ

Posted by patrick sur octobre 19, 2007

Des nouvelles en provenance de:

  • http://www.asp-php.net/tutorial/asp.net/linq-1.php (« Cette article est, je l’espère, le première d’une série que j’ai décidé de nommer « LINQ et vous ». Force est de constater que dans la lignée de mes articles précédent relatifs au .NET Framework 2.0 et Visual Studio 2005, nous avons toujours dans cette nouvelle version une convergence de plus en plus forte des langages et outils de développements associés« )
  • http://www.asp-php.net/tutorial/asp.net/linq-2.php?page=1 (« L’objectif est toujours de nous amener pas à pas vers la finalité de l’évolution du .NET Framework en version 3.5. Poursuivons ainsi notre découverte du .NET Framework 3.5 et de son écosystème !« )

Evolution des produits Visual Studio

Les principaux enseignements de ces billets:

  • Les versions de Framework et de la CLR ne sont pas pas associés. Entre 2005 et 2008 c’est toujours la machine virtuelle CLR V2.0== »Vous pouvez ainsi faire évoluer aisément vos applications actuelles vers les nouvelles librairies du .NET Framework 3.0 ou 3.5« 
  • les nouveautés des langages viennent non pas de la modification de la CLR mais des demandes des développeurs pour le développement de LINQ
  • « Les évolutions du .NET Framework de la version 2.0 à 3.5 peuvent être en quelque sorte considérées comme des ajouts de nouvelles librairies basées elles-mêmes sur le .NET Framework 2.0 et de ce fait la CLR 2.0.
  • Les projets Visual Studio 2005 sont récupérables sans migration dans Visual Studio 2008.
  • Visual Studio 2008 vous permet de sélectionner la version du .NET Framework que vous souhaitez cibler pour chaque projet mais plus encore de modifier cette cible à tout moment !

Historique de .Net Framework

Source: http://www.asp-php.net/tutorial/asp.net/linq-2.php?page=1

« Voici pour rappel, quelques dates clés :

  • 2002 : .NET Framework 1.0
  • 2003 : .NET Framework 1.1
  • Fin 2005 : .NET Framework 2.0
  • Fin 2006 : .NET Framework 3.0
  • Fin 2007 (début 2008) : .NET Framework 3.5″

Historique .NET framework

Autres sites à consulter

  • LINQ (http://en.wikipedia.org/wiki/Language_Integrated_Query , « Language Integrated Query (LINQ), pronounced « link », is a Microsoftsyntax reminiscent of SQL to .NET Framework programming languages, initially to the Visual Basic .NETC# languages. Many of the concepts that LINQ has introduced were originally trialled in Microsoft’s research project. LINQ defines project that adds a native querying and standard query operators that allow code written in LINQ-enabled languages to filter, enumerate, and create projections of several types of collections using the same syntax. Such collections may include arrays, enumerable classes, XML, datasets from relational databases, and third party data sources. The LINQ project uses features of version 2.0 of the .NET Framework, new LINQ-related assemblies, and extensions to the C# and Visual Basic .NET languages. Microsoft has distributed a preview release of LINQ, consisting of those libraries and compilers for C# 3.0 and Visual Basic 9. LINQ is planned for release with the ‘Orcas‘ version of Visual Studio 2008. [6] The release date for Visual Studio 2008 has been announced by Microsoft as February 27, 2008.« )

Les fils de syndication

Posted in C_sharp, DotNet | Tagué: , , , , , , , , , | Leave a Comment »

GrassHopper: faire tourner des applications ASP.NET sur des serveurs J2EE

Posted by patrick sur août 17, 2007

En lisant les flux RSS du blog de Miguel de Icaza (http://tirania.org/blog/miguel.rss2), (infos disponible aussi sur http://blog.mainsoft.com/blog/feed/) une information intéressante pour mono: faire tourner des applications ASP.NET sur des serveurs J2EE.

http://tirania.org/blog/archive/2007/Aug-16.html (« A few years ago we met Rafi at one of our Mono summits in Boston, he works for Mainsoft and he has always been amazing. Watch his interview on what he is doing with Grasshopper here and here. He talks about Mainsoft’s contributions to Mono, about his testing procedures and the kind of things that are possible with Grasshopper when integrating ASP.NET applications when running on J2EE servers. »)

Quelques définitions

http://en.wikipedia.org/wiki/J2EE (« The platform was known as Java 2 Platform, Enterprise Edition or J2EE until the name was changed to Java EE in version 1.5.

Java EE is defined by its specification. As with other Java Community Processstandard since providers must agree to certain conformance requirements in order to declare their products as specifications, Java EE is also considered informally to be a Java EE compliant; albeit with no ISO or ECMA standard

History

The original J2EE specification was developed by Sun Microsystems.

Starting with J2EE 1.3, the specification was developed under the Java Community Process. JSR 58 specifies J2EE 1.3 and JSR 151 specifies the J2EE 1.4 specification.

The J2EE 1.3 SDK was first released by Sun as a beta in April 2001. The J2EE 1.4 SDK beta was released by Sun in December 2002.

The Java EE 5 specification was developed under JSR 244 and the final release was made on May 11, 2006.

The Java EE 6 specification is being developed under JSR 316 and is scheduled for release in 2008. « )

http://en.wikipedia.org/wiki/Java_%28programming_language%29 (« Java is a programming language originally developed by Sun Microsystems and released in 1995. Java applications are typically compiled to bytecode, although compilation to native machine code is also possible. At runtime, bytecode is usually either interpreted or compiled to native code for execution, although direct hardware execution of bytecode by a Java processor is also possible.

The language derives much of its syntax from C and C++ but has a simpler object modelJavaScript, a scripting language, shares a similar name and has similar syntax, but is not directly related to Java. and fewer low-level facilities.

The original and reference implementation Java compilers, virtual machines, and class libraries were developed by Sun from 1995.

As of May 2007, in compliance with the specifications of the Java Community Process, Sun made available most of their Java technologies as free software under the GNU General Public License. Others have also developed alternative implementations of these Sun technologies, such as the GNU Compiler for Java and GNU Classpath

Releases

Main article: Java version history

The Java project has seen many release versions. Since 1995 they are:

http://dev.mainsoft.com/ ( » We believe that for Visual Studio developers, the fastest route to open systems is extending your existing .NET development skills to the Java EE platform. Grasshopper 2.0 enables you to produce .NET Web and server applications that run on Linux & other Java-enabled platforms using ASP.NET 2.0 controls, role-based security, and C# generics. Check out our developer blogs, interop forums, code samples, and how-to articles to learn how…« )

http://dev.mainsoft.com/Default.aspx?tabid=130 (« For most .NET developers, there is simply no substitute for the Visual Studio® IDE, the .NET Framework, and either Visual Basic or C#. With Grasshopper, you can use your favorite development environment from Microsoft® to deploy applications on Java-enabled platforms such as Linux®. Grasshopper is the freely available Developer Edition of Mainsoft® for Java EE, a Visual Studio plug-in that you can use to create server and ASP.NET applications, or port existing .NET 2.0 applications on Linux and other Java-enabled platforms, without having to re-engineer your code in Java.

Grasshopper 2.0 introduces support for the Visual Studio 2005 development environment, Visual Basic, and C# 2.0, including the generics language feature, the .NET Framework 2.0, and ASP.NET 2.0 controls. Use Grasshopper and the Visual Studio IDE to code, compile, debug, and deploy your application natively on the Java EE platform. »)

http://blog.mainsoft.com/blog/ (Le blog des développeurs de Mainsoft)

Posted in ASP.NET, C_sharp, J2EE, java, mono | Leave a Comment »