July 2016 - Pharo-users - lists.pharo.org

System Browser "Implementors of..." drill down?
by Norbert Fortelny July 26, 2016

July 26, 2016

Something I have not figured out how to do easily in the Pharo system browser: I am looking at a method and want to see how a message that is used in this method is implemented. In other Smalltalks (e.g. Cincoms) I use the menu item "Implementors of..." and get a list of all the messages that are used in this method and can choose one to drill down. In Pharo I get an immediate answer but only the implementors of my original method. Why are there those "..." at the end of this menu item indicating some further choice when there is none? How to do this drilling down in Pharo? -- View this message in context: http://forum.world.st/System-Browser-Implementors-of-drill-down-tp4907380.h… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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VW Store access (Re: Pharo and GIT)
by Ben Coman July 26, 2016

July 26, 2016

On Tue, Jul 26, 2016 at 3:43 PM, Thierry Goubier <thierry.goubier(a)gmail.com> wrote: > Note, for those who miss VW Store, that Squeak has a Magma mapping for code. This sounds useful. Could you describe it a bit more how to use and where to get it? cheers -ben

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System Browser "Implementors of..." drill down?
by Torsten Bergmann July 26, 2016

July 26, 2016

Norbert Fortelny wrote: >Something I have not figured out how to do easily in the Pharo system >browser: I am looking at a method and want to see how a message that is used in this >method is implemented. Have a look at my Message Flow browser: http://forum.world.st/ANN-MessageFlowBrowser-td4849049.html https://www.youtube.com/watch?v=DRd_bzGocQg It should do the job you need. You can load it from Catalog. It mimics a "dive in like" message browser that is found in SmalltalkMT but for Pharo. HernÃ¡n Morales Durand >This was actually implemented in older versions of Pharo (or Squeak), the >browser also included very handy buttons in the middle to save precious >clicks. Yes - this was removed from Pharo but was useful. Stef wrote: >I would also love to scope and manipulate the scope of the list. For >example I would like Some Smalltalks had "Senders"/"Implementors" and "Local Senders"/"Local Implementors" just checking the hierarchy upwards. This was useful and we possibly should include such facilities (scoped to hierarchy, package, ...) in the future again. Thanks Torsten

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Can GitHubcello be used against BitBucket?
by Sean Glazier July 25, 2016

July 25, 2016

Hi, The git repository they are setting up is using Bitbucket part of the JIRA toolsets. Or do I need to publish to GitHub and the import? Is there a Monticello tool for publishing directly to the bitbucket git repository? Forgive my ignorance in this. I have looked over dale slideshow on the subject at ESUG. I am wondering what my workflow needs to be. Kind Regards, Sean Glazier

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What's the equivalent of Smalltalk osVersion in Pharo????
by Casimiro - GMAIL July 25, 2016

July 25, 2016

Hello, What's the equivalent of Smalltallk osVersion in pharo?

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How learning Smalltalk can make you a better developer
by horrido July 25, 2016

July 25, 2016

A new article on Smalltalk has been published at TechBeacon: How learning Smalltalk can make you a better developer <http://techbeacon.com/how-learning-smalltalk-can-make-you-better-developer> . Hopefully, it will go viral. -- View this message in context: http://forum.world.st/How-learning-Smalltalk-can-make-you-a-better-develope… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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pharo 5 crashing
by Sean Glazier July 25, 2016

July 25, 2016

Hi, I have been saving and restarting my images all night and I carefully do a save as regularly in case I toast an image. This morning I can not seem to start up any of my images including a clean one. Head scratch. std err has it dying in the weak array finalization process. Could I get enlightened as to why? [31m [0mProcess>>terminate WeakArray class>>restartFinalizationProcess WeakArray class>>startUp: ClassSessionHandler>>startup: [ :each | each startup: isImageStarting ] in WorkingSession>>runStartup: in Block: [ :each | each startup: isImageStarting ] [ aBlock value: each ] in [ :each | [ aBlock value: each ] on: Exception do: [ :error | self errorHandler handleError: error ] ] in WorkingSession>>runList:do: in Block: [ aBlock value: each ] BlockClosure>>on:do: [ :each | [ aBlock value: each ] on: Exception do: [ :error | self errorHandler handleError: error ] ] in WorkingSession>>runList:do: in Block: [ :each | ... Array(SequenceableCollection)>>do: WorkingSession>>runList:do: WorkingSession>>runStartup: WorkingSession>>start: SessionManager>>snapshot:andQuit: SmalltalkImage>>snapshot:andQuit: [ Smalltalk snapshot: true andQuit: false ] in WorldState class>>saveSession in Block: [ Smalltalk snapshot: true andQuit: false ] BlockClosure>>ensure: CursorWithMask(Cursor)>>showWhile: WorldState class>>saveSession [ | selArgCount | "show cursor in case item opens a new MVC window" (selArgCount := selector numArgs) = 0 ifTrue: [ target perform: selector ] ifFalse: [ selArgCount = arguments size ifTrue: [ target perform: selector withArguments: arguments ] ifFalse: [ target perform: selector withArguments: (arguments copyWith: evt) ]. self showShortcut ]. self changed ] in ToggleMenuItemMorph(MenuItemMorph)>>invokeWithEvent: in Block: [ | selArgCount |... BlockClosure>>ensure: Cursor>>showWhile: ToggleMenuItemMorph(MenuItemMorph)>>invokeWithEvent: ToggleMenuItemMorph(MenuItemMorph)>>mouseUp: ToggleMenuItemMorph(MenuItemMorph)>>handleMouseUp: MouseButtonEvent>>sentTo: ToggleMenuItemMorph(Morph)>>handleEvent: MorphicEventDispatcher>>dispatchDefault:with: MorphicEventDispatcher>>handleMouseUp: MouseButtonEvent>>sentTo: [ ^ anEvent sentTo: self ] in MorphicEventDispatcher>>dispatchEvent:with: in Block: [ ^ anEvent sentTo: self ] [0m Kind Regards, Sean Glazier

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[ANN] Metacello support for GitFileTree metadata-less mode
by Dale Henrichs July 25, 2016

July 25, 2016

In the last month or so we've had a couple of different discussions on this list involving adding support to Metacello (otherwise known as "Cypress package extension") for GitFileTree's metadata-less mode[1] and [4] and earlier this week I released a new version of Metacello[2] that includes an updated version of the "Cypress package extension"[5]. Depending on the version of Pharo you are using, at some point in time, I expect this new release of Metacello to be available in the standard download. Until then, to install the latest version of Metacello into Pharo execute the following in a workspace: Metacello new baseline: 'Metacello'; repository: 'github://dalehenrich/metacello-work:master/repository'; get. Metacello new baseline: 'Metacello'; repository: 'github://dalehenrich/metacello-work:master/repository'; onConflict: [:ex | ex allow]; load If you are using GitFileTree's metadata-less mode and Metacello, then add the following method to your BaselineOf: projectClass ^ MetacelloCypressBaselineProject and you are good to go. If you are curious as to why "Cypress package extensions" are needed, you can read this comment[6] for a description of what rules Metacello uses when fetching/loading packages from a FileTree repository using a baseline. On a slightly different topic, Alistair Grant ran into a bug involving Metacello and how it semantic version numbers[7] a couple months ago and this release includes a bug fix ... the bug was related to the fact that the parser was too lenient and did throw an error for some forms of invalid Semantic version numbers ... with this fix an error is thrown ... of course it is entirely possible that there are ConfigurationOfs out in the wild that "depend upon the old behavior" so if you get an "invalid version number" error while working with a configuration and discover that it is not practical to redefine the version numbers to conform to the semantic version number format then you can add the following method to the ConfigurationOf and the old, buggy version of the parser will be used: versionNumberClass ^ MetacelloOldSemanticVersionNumber If you are sharing code between GemStone and Pharo, then you will want to make sure that you install the new version of Metacello in GemStone as well. See the GemStone release announcement for details[8]. Dale [1] http://forum.world.st/Saving-to-local-git-and-quot-Loading-all-file-names-f… [2] https://github.com/dalehenrich/metacello-work/pull/401 [4] http://forum.world.st/How-do-I-convert-a-FileTree-project-to-Metadataless-G… [5] https://github.com/dalehenrich/metacello-work/issues/399 [6] https://github.com/dalehenrich/metacello-work/issues/399#issuecomment-23146… [7] https://github.com/dalehenrich/metacello-work/issues/392 [8] http://forum.world.st/new-release-of-Metacello-metadata-less-FileTree-repos…

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[ANN] JSONWebToken
by Norbert Hartl July 25, 2016

July 25, 2016

Hi, thanks to the inquiry of Sven I published an implementation of JSONWebToken to smalltalkhub. It is available at http://smalltalkhub.com/#!/~NorbertHartl/JSONWebToken <http://smalltalkhub.com/#!/~NorbertHartl/JSONWebToken> For those who don't know JSONWebToken or short JWT pronounced "jot" is a token format suitable for authentication and authorization. The token consist of a header, a payload and a signature. The header defines crypto algorithms, compression and other things needed to read a token on reception. The payload is called a claim set which is basically a dictionary with well-known and custom keys. If we think about OAuth or OpenId the values contained map directly to JWT claims. For OpenID connect which is an identification mechanism on top of OAuth the usage of JWT is one of the building blocks. What are the advantages in using JWT? - it defines a header for encoding the content so it is quite flexible in the ways compression and encryption of the key is done - defines a payload which maps arbitrary keys and there is a set of well-known keys that implementations of OAuth, OpenID can understand - defines a signature that makes it easy to trust the information contained or to give the token to someone who is not trusted - token format is a single line string so it can be used e.g. in HTTP authentication headers A problem JWT can solve: In our company we have a lot of little REST servers serving some duties. To minimize the chaos I want to have a central authentication and authorization point. If we assume having 20 images running and we look at typical way how authorization works: there is image A (Authentication), image S (Service) und client C. Client C wants to use the service S 1. client C authenticates and retrieves authorization information from A (or from S which redirects him to A) 2. client C hands out the authorization information to S 3. S needs to check at A if the information is valid (client C could have modified it or generated it) 4. S grants C access Taking the assumption of having 20 service images, every image would need to get back to A in order to check authorization information. The more services images you have the more load it will put on A. In a JWT use case scenario the same would look like 1. client C authenticates and receives a JWT containing authorization information. The token is signed by A 2. client C hands out JWT to service S 3. S checks the signature of A and knows that the authorization information contained is valid. 4. S grants C access FYI, Norbert

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Re: [Pharo-users] An Implementation of JSON Web Tokens
by andrew glynn July 24, 2016

July 24, 2016

Thanks for this Norbert. It works great with Teapot microservices that are associated with specific JQuery widget instances. I can insert the token into the widget's callback to the pot so that only that widget instance can use that particular service. The way our web app works is that it generates a JSP with all the repetitive content / look and feel, and inserts JQuery widgets to display any dynamic data. Since the data I'm working on comes from a Pharo app I configure the JQuery widget and a pot, and supply the widget to the Java EE server from Seaside to generate the full page. The widget also keeps a lease open with the Seaside server and when the user leaves the page and the widget stops requesting the lease, Pharo can recycle the pot. Andrew Glynn On 7/22/2016 6:12 AM, pharo-users-request(a)lists.pharo.org wrote: > An Implementation of JSON Web Tokens -- Andrew Glynn 647-539-7228 (cell/text) â ââ âââ ââ â Burnin down the house ...

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