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[Pharo-project] Pharo 1.4 Tests-Unix - Build # 282 - Still unstable!
by jenkins-pharo.ci.inria.fr＠jenkins-server.lille.inria.fr March 12, 2012

March 12, 2012

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[Pharo-project] [update 1.4] #14388
by Marcus Denker March 12, 2012

March 12, 2012

14388 ----- Issue 5464: SystemNavigation>>browseHierarchy:selector: should use Browser>> #spawnHierarchyForClass:selector: http://code.google.com/p/pharo/issues/detail?id=5464 Issue 5462: improve comment of join: http://code.google.com/p/pharo/issues/detail?id=5462 Issue 5463: Undeclared in DefaultSettingStyle>>#load http://code.google.com/p/pharo/issues/detail?id=5463 -- Marcus Denker -- http://marcusdenker.de

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[Pharo-project] Nautilus + refactoring : removing inst vars doesn't works
by Igor Stasenko March 12, 2012

March 12, 2012

create class, add ivar, add accessors for it. Now try via refactoring menu to remove inst var. it opens a fresh browser window instead of list of methods which referencing ivar i choose to remove -- Best regards, Igor Stasenko.

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[Pharo-project] [ANN] A Unifying Mechanism for the Implementation of Concurrency Abstractions
by Stefan Marr March 11, 2012

March 11, 2012

Hi, beware the shameless plug: Our paper Identifying A Unifying Mechanism for the Implementation of Concurrency Abstractions on Multi-Language Virtual Machines [1] introduces an ownership-based Meta-object Protocol (MOP) to enable the enforcement of the various concurrency semantics required by the different programming models discussed in literature. The prototypical implementation is done on top of Pharo 1.3 and available at SqueakSource3 [2] under the MIT license. You might be interested in it to experiment with new concurrent programming models. Typically, green threads are enough to be exposed to race conditions and other correctness problems. Thus, a CogVM is sufficient for experiments. RoarVM support is coming later, enabling experiments with the parallel aspects of these programming models as well. For the evaluation, we implemented a couple of concurrency models on top of it. Most notably, you can use Clojure-like agents, AmbientTalk-like actors, a basic CSP, Active Objects, and an STM that is a port of Lukas Renggli's work. These concurrency models work out of the box with the Metacello configuration given below (to the degree they were tested and benchmarked). You might also be interested in the AmbientTalkST implementation that was done as comparison as well as the direct port of Lukas' STM to Pharo 1.3 [3]. Please see the paper [1] for an introduction to the MOP and an example how to use it to make objects immutable and implement Clojure's agents guaranteeing all required semantics. The paper's abstract: Supporting all known abstractions for concurrent and parallel programming in a virtual machines (VM) is a futile undertaking, but it is required to give programmers appropriate tools and performance. Instead of supporting all abstractions directly, VMs need a unifying mechanism similar to INVOKEDYNAMIC for JVMs. Our survey of parallel and concurrent programming concepts identifies concurrency abstractions as the ones benefiting most from support in a VM. Currently, their semantics is often weakened, reducing their engineering benefits. They require a mechanism to define flexible language guarantees. Based on this survey, we define an ownership-based meta-object protocol as candidate for VM support. We demonstrate its expressiveness by implementing actor semantics, software transactional memory, agents, CSP, and active objects. While the performance of our prototype confirms the need for VM support, it also shows that the chosen mechanism is appropriate to express a wide range of concurrency abstractions in a unified way. The code can be loaded into a fresh Pharo 1.3 image [4] with the following Gofer expression. However, be aware this is experimental software. Furthermore, note that you will need to acknowledge changes to the Process class: Gofer new url: 'http://ss3.gemstone.com/ss/Omni'; package: 'ConfigurationOfOmni'; load. (Smalltalk at: #ConfigurationOfOmni) loadTOOLS2012. As mentioned before, the paper gives some examples. The definition of different concurrency semantics can be found in subclasses of OstDomain. Examples of how to use any of the existing concurrency models are either the unit tests, or the included benchmarks. Note that the MOP based implementation of AmbientTalkST does use the same class names. Thus, to use the ad-hoc implementation, you will need to load it into a different image: Gofer new url: 'http://ss3.gemstone.com/ss/Omni'; package: 'ConfigurationOfAmbientTalkST'; load. (Smalltalk at: #ConfigurationOfAmbientTalkST) loadTOOLS2012. Similarly, the port of Lukas Renggli's STM to Pharo needs to be loaded into a separate image, too. This version is not using our MOP: Gofer new url: 'http://ss3.gemstone.com/ss/LRSTM'; package: 'ConfigurationOfLRSTM'; load. (Smalltalk at: #ConfigurationOfLRSTM) loadTOOLS2012. Acknowledgements: Thanks to Lukas for his STM implementation I used here. It was also a strong inspiration for my bytecode transformation approach. Best regards Stefan -- Stefan Marr Software Languages Lab Vrije Universiteit Brussel Pleinlaan 2 / B-1050 Brussels / Belgium http://soft.vub.ac.be/~smarr Phone: +32 2 629 2974 Fax: +32 2 629 3525

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Re: [Pharo-project] mocking
by Paul DeBruicker March 11, 2012

March 11, 2012

Does http://www.squeaksource.com/Mocketry.html meet your needs?

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[Pharo-project] Strange behavior
by StÃ©phane Ducasse March 11, 2012

March 11, 2012

'abc' replaceAll: $a asString with: $z asString. 'abc' | s | s := 'abc'. s replaceAll: $a asString with: $z asString. s 'abc' while the finder is telling me 'abc' replaceAll: $a asString with: $z asString. 'zbc' quite confusingâ¦ stef

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[Pharo-project] mocking
by Milan Mimica March 11, 2012

March 11, 2012

Hi, is there some library for making unit test mock objects[1]? I'd like something like Mockito[2], but with less convulsive implementation :). [1] http://en.wikipedia.org/wiki/Mock_object [2] http://code.google.com/p/mockito/ -- Milan Mimica

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[Pharo-project] about pharo1.4
by Fernando Olivero March 11, 2012

March 11, 2012

However redid the FileBrowser in Pharo1.4 did an excellent work. Also the other standard tools in the kernel seem to got simpler and easier to use, thanks! Fernando

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[Pharo-project] Increase populatity of Pharo by doing some Killer-OpenSource-Tools
by Torsten Bergmann March 11, 2012

March 11, 2012

Hi Stefan, I'm not sure if it is a killer app that is required to get more visibility for Pharo or a better adoption of Smalltalk. We already have nice open-source apps ranging from Seaside, Pier, Moose, Swiki, ... up to other Smalltalk apps that are sucessfull also in business life. Look at JPMorgans Kapital project done in VW, other big Smalltalk projects or the Pharo success stories [2] meanwhile known to the world. Still Smalltalk is very unknown among developers ... I agree with Dave Thomas who said that the object abstraction is too complex for the majority of programmers. [1] Most people are happy with (boring) CRUD applications and I doubt a killer app implemented in Smalltalk will change this. Most of them see no need for switching from Java, C#, ... Not that I would not want to see Trac/Bugzilla/... one-click replacements done in Smalltalk - but building them will eat up our resources to build something that should be even better than current Smalltalks. I doubt that Pharo will become the "next big thing". I'm not sad about that since most hype technologies will easily fade away when the next hype comes up. Maybe you remember auctomatic.com - these guys have built an app with Seaside and sold the company for lots of money. So it must have been a killer app. One of them (Patrick) shares some nice thoughts on his page [3] - if you replace "auctomatic" with Pharo and "ebay" with one of the mainstream technologies like Java it is an interesting guide for a future of Pharo too. Especially regarding internationalization which is I think an interesting area to get more people into Smalltalk. Bye Torsten [1] http://smalltalk-bob.blogspot.com/2012/03/who-needs-objects.html [2] http://www.pharo-project.org/about/success-stories [3] http://patrickcollison.com/blog/2009/10/surprises -- Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir belohnen Sie mit bis zu 50,- Euro! https://freundschaftswerbung.gmx.de

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[Pharo-project] [update 1.4] #14387
by Marcus Denker March 11, 2012

March 11, 2012

14387 ----- Issue 5453: change CurrentMajorVersionNumber in ScriptLoader http://code.google.com/p/pharo/issues/detail?id=5453 Issue 5457: improve semantic source links http://code.google.com/p/pharo/issues/detail?id=5457 Issue 5455: fix for simpleSwitchMorph http://code.google.com/p/pharo/issues/detail?id=5455 Issue 5451: Workaroung for Green tests http://code.google.com/p/pharo/issues/detail?id=5451 Issue 5441: Fixing timestamp coherence http://code.google.com/p/pharo/issues/detail?id= 5441 -- Marcus Denker -- http://marcusdenker.de

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