April 2014 - Pharo-users - lists.pharo.org

Base64 or HMAC problem
by Spiliosv April 29, 2014

April 29, 2014

Dear all, I am currently having an issue on Pharo 2.0 for windows in using HMAC encryption and subsequent bas64 encoding. I have loaded the cryptography library from smalltalkhub, but I do not get appropriate results when using the code below: encodedSignature := (SHA256 new) hmac key: apiKey asByteArray; digestMessage: unsignedSignature asByteArray. encodedSignature base64Encoded encodeForHTTP. With values: apiKey := '123456789'. unsignedSignature := 'pharmacistprescriptionsget000001'. the result obtained is correct. But with values apiKey := 'veQC+IBLq5qMO8oGcQupjg=='. userName := 'testpharm'. barCode :='1403122014500'. unsignedSignature := userName,'prescriptionsgetexecuted',barCode. the result is not correct. What am I doing wrong or I do not understand correctly? Kind regards, Spilios -- View this message in context: http://forum.world.st/Base64-or-HMAC-problem-tp4756788.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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30838 and 837 *REVERTED*
by Marcus Denker April 28, 2014

April 28, 2014

Hi, if you downloaded 30 838 (from today) or 30 837 please re-download 837. Both images where broken due to things that have to be done âjust before the releaseâ, which are, of course, broken as they are only done just before the release once a year. Marcus

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Dynamic example for spec
by Stephan Eggermont April 28, 2014

April 28, 2014

While trying to understand spec, Iâve written an example of using dynamic specs. https://github.com/StephanEggermont/documentation/blob/master/SpecDynamicEx… A list of parties, where instances of different subclasses can be added. Comments & improvements are welcome. Stephan !!Parties, a dynamic example In an address book we find addresses of both people and organizations. The generalization of both is called a party ('Analysis Patterns', Martin Fowler). In this example we'll make an address book where we can add both persons and companies. They will have different attributes. We show how to do add them with a dynamic user interface, and minimize duplication. !!! The party model Create the abstract superclass ==Party== [[[ Object subclass: #DOParty instanceVariableNames: '' classVariableNames: '' category: 'Domain-Parties' ]] A party responds to the ==fullName== message. [[[ DOParty>fullName ^'Full name' ]]] The subclasses are going to override this message. Create a subclass for persons: [[[ DOParty subclass: #DOPerson instanceVariableNames: 'firstName lastName' classVariableNames: '' category: 'Domain-Parties' ]]] Create accessors for ==firstName== and ==lastName==. We don't want to need to handle ==nil== as a special case, so return the empty string if the instVars are nil. [[[ DOPerson>firstName ^firstName ifNil: [ '' ] DOPerson>firstName: aString firstName := aString DOPerson>lastName ^lastName ifNil: [ '' ] DOPerson>lastName: aString lastName := aString ]]] We can now override the ==fullName==. [[[ DOPerson>fullName ^self firstName, ' ', self lastName ]]] Create a subclass for companies [[[ DOParty subclass: #DOCompany instanceVariableNames: 'companyName' classVariableNames: '' category: 'Domain-Parties' ]]] And its accessors and the overridden method [[[ DOCompany>companyName ^ companyName ifNil: [''] DOCompany>companyName: anObject companyName := anObject DOCompany>fullName ^ self companyName ]]] In this example we will simply keep all parties in the image. We create a class to hold parties [[[ Object subclass: #DOPartiesModel instanceVariableNames: 'parties' classVariableNames: '' category: 'Domain-Parties' ]]] And lazily initialize with a collection [[[ DOPartiesModel>parties ^parties ifNil: [ parties := OrderedCollection new ] DOPartiesModel>parties: aCollection parties := aCollection ]]] On the class side we add an instanceVariable ==default== as the singleton and two methods to access and reset it. [[[ DOPartiesModel class instanceVariableNames: 'default' DOPartiesModel>>default ^default ifNil: [ default := self new ] DOPartiesModel>>reset default := nil ]]] !!! A dynamic editor To edit a single party, we create a subclass of ==DynamicComposableModel== [[[ DynamicComposableModel subclass: #DOPartyEditor instanceVariableNames: 'partyClass' classVariableNames: '' category: 'Domain-Parties' ]]] When we instantiate this editor, we'll tell it on what kind of party it operates and store that in the ==partyClass==. On the instance side we add accessors and on the class side we use that in a constructor. A ==DynamicComposableModel== has a complex initialization proces, so we use a separate ==basicNew== and ==initialize== to set the ==partyClass== early enough. [[[ DOPartyEditor>partyClass: aPartyClass partyClass := aPartyClass DOPartyEditor>partyClass ^partyClass DOPartyEditor>>on: aPartyClass ^self basicNew partyClass: aPartyClass; initialize; yourself ]]] This class has no ==defaultSpec==, as it is only created with a dynamic spec. The editor is going to be a separate window. The window title is dependent of the class. Party and subclasses define it at the class side. [[[ DOParty>>title "override in subclasses" ^'Party' DOCompany>>title ^'Company' DOPerson>>title ^'Person' DOPartyEditor>title ^ partyClass title ]]] The editor needs to know what fields need to be created. On the class side of the Party subclasses we return an array of symbols representing the fields. This will do for the example, for a real application with differnt kinds of fields Magritte descriptions are much more suitable. [[[ DOParty>>fields ^self subclassResponsibility DOCompany>>fields ^#(#companyName) DOPerson>>fields ^#(#firstName #lastName) ]]] Now we can initialize the widgets. ==instantiateModels== expects pairs of field names and field types and adds them to the widgets dictionary. They are then laid out in one column, given some default values and added in focus order. [[[ DOPartyEditor>initializeWidgets |models| models := OrderedCollection new. partyClass fields do: [ :field | models add: field; add: #TextInputFieldModel ]. self instantiateModels: models. layout := SpecLayout composed newColumn: [ :col | partyClass fields do: [ :field | col add: field height: self class inputTextHeight]]; yourself . self widgets keysAndValuesDo: [ :key :value | value autoAccept: true; entryCompletion:nil; ghostText: key. self focusOrder add: value] . ]]] The last thing needed is to calculate how large the window should be. It is going to be used as a dialog with ok and cancel that take up a height of about three input fields. [[[ DOPartyEditor>initialExtent ^ 300@(self class inputTextHeight*(3+partyClass fields size)) ]]] Now we can test the editor with ==(DOPartyEditor on: DOCompany) openDialogWithSpec== and ==(DOPartyEditor on: DOPerson) openDialogWithSpec== !!! The adres book We can now make the address book with a search field and buttons to add persons and companies. Add a class [[[ ComposableModel subclass: #DOPartiesList instanceVariableNames: 'search addPerson addCompany list' classVariableNames: '' category: 'Domain-Parties' ]]] As soon as something is typed in the search field, the list should show the list of parties having a fullName containing the search term, ignoring case. [[[ DOPartiesList>refreshItems |searchString| searchString := search text asLowercase. list items: (DOPartiesModel default parties select: [: each | searchString isEmpty or: [each fullName asLowercase includesSubstring: searchString]]); displayBlock: [ :each | each fullName]. ]]] We can now create the widgets and the default layout (class side) [[[ DOPartiesList>initializeWidgets search := self newTextInput. search autoAccept: true; entryCompletion:nil; ghostText: 'Search'. addPerson := self newButton. addPerson label: '+Person'. addCompany := self newButton. addCompany label: '+Company'. list := self newList. self refreshItems. self focusOrder add: search; add: addPerson; add: addCompany; add: list. DOPartiesList>>defaultSpec <spec: #default> ^SpecLayout composed newColumn: [ :col | col newRow: [:row | row add: #search; add: #addPerson; add: #addCompany] height: ComposableModel toolbarHeight; add: #list]; yourself ]]] ]]] When the user clicks on the ok button of the party editor, we need to create an instance of the right subclass, read the field values out of the editor and assign them to the attributes of the new instance. We do that using meta-programming (==perform:== and ==perform:with:==). Then we add the instance to the model and need to refresh the list. Add a method setting the okAction block of the editor. [[[ DOPartyList>addPartyBlockIn: anEditor anEditor okAction: [ |party| party := anEditor model partyClass new. anEditor model partyClass fields do: [ :field | party perform: (field asMutator) with: (anEditor model perform: field) text ]. DOPartiesModel default parties add: party. self refreshItems ]. ]]] Now we can initialize the presenter [[[ DOPartyList>initializePresenter search whenTextChanged: [ :class | self refreshItems ]. addPerson action: [ |edit| edit := (DOPartyEditor on:DOPerson) openDialogWithSpec. self addPartyBlockIn: edit]. addCompany action: [ |edit| edit := (DOPartyEditor on: DOCompany) openDialogWithSpec. self addPartyBlockIn: edit ] ]]] Don't forget the accessors [[[ DOPartyList>addCompany ^addCompany DOPartyList>addPerson ^addPerson DOPartyList>items: aCollection list items: aCollection DOPartyList>list ^list DOPartyList>search ^search ]]] protocol [[[ DOPartyList>resetSelection list resetSelection DOPartyList>title ^ 'Parties' ]]] and protocol-events [[[ DOPartyList>whenAddCompanyClicked: aBlock addCompany whenActionPerformedDo: aBlock DOPartyList>whenAddPersonClicked: aBlock addPerson whenActionPerformedDo: aBlock DOPartyList>whenSelectedItemChanged: aBlock list whenSelectedItemChanged: aBlock ]]] This can be tested with ==DOPartiesList new openWithSpec==

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[ANN] JNIPort for Pharo 3.0 alpha
by Joachim Geidel April 27, 2014

April 27, 2014

Hi everybody, JNIPort for Pharo 3.0 alpha is now available at SmalltalkHub. JNIPort is a Smalltalk library which allows Java code to be invoked from Smalltalk. It acts as a bridge between the world of Smalltalk objects and a Java Virtual Machine (JVM) where Java code is executing. When I first ported JNIPort to Squeak and Pharo 1.x, I used Alien as the FFI library. As NativeBoost has superseded Alien, the interface to the Java Native Interface library had to be rewritten. There are still some undocumented and obscure parts in NativeBoost, so this has taken some time. If you want to try it, load it via the ConfigurationOfJNIPort. I hope this works. If it does not, load the packages individually in the order in which they appear in the ConfigurationOfJNIPort. http://www.smalltalkhub.com/#!/~JNIPort/JNIPort The next step is to read the documentation at http://jniport.wikispaces.com/ Otherwise, you won't know what to do next. ;-) Download the extra files from the download page at Wikispaces, you will need two jar files from there. Start a Java VM attached to Pharo by adapting and executing the following code snippet: ---- | jvmSettings | "You can set the path to the Java VM library by editing the path as needed." JNIPortJNIInterface libraryFile: '/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Libraries/libclient.dylib' . "JNIPortJNIInterface libraryFile: 'C:\Programme\Java\jre7\bin\client\jvm.dll' ." jvmSettings := JVMSettings new. jvmSettings usesGhosts: true. jvmSettings supportsCallbacks: true. jvmSettings jniPortSettings useJNIHelperLibrary: false. jvmSettings ghostClassSettings retainMethodSource: true. "On Mac OS X and Linux, class path entries are separated by colons." "On Windows, you have to use semicolons instead. Edit the following line as needed." jvmSettings runtimeSettings classpath: '.:/Users/myname/JNIPort.jar:/Users/myname/JNIPort-Tests.jar'. " jvmSettings runtimeSettings classpath: '.;.\JNIPort.jar;.\JNIPort-Tests.jar'." "Uncomment the following if you want the Java VM to emit verbose messages. How to access these messages depends on your platform. On Mac OS X, they are visible in the Console application." "jvmSettings runtimeSettings addOption: '-verbose:jni'; addOption: '-verbose:gc'; addOption: '-verbose:class'." Cursor execute showWhile: [JVM newWithSettings: jvmSettings]. ---- Then the fun starts: ---- | zfClass zipfile entries | zfClass := JVM current findClass: #'java.util.zip.ZipFile'. zipfile := zfClass new_String: 'JNIPort.jar'. zipfile size. "--> answers an Integer" entries := zipfile entries. entries asAnEnumeration do: [:each | Transcript cr; print: each]. ---- And now to the ugly little secret reason why I call it an alpha version: While everything seems to work, it is *much* slower than it used to be in Pharo 1.2 with Alien. And when I compare it with VisualWorks, I wonder if the Pharo version secretly does some additional work for SETI: - Starting the JVM: VisualWorks 0.7 seconds Pharo 7 to 8 seconds - A benchmark using some methods of java.io.BufferedReader and java.util.StringTokenizer: VisualWorks 114 milliseconds Pharo 12 to 13 seconds I have not yet found the reason. The TimeProfiler is not very helpful, as its 1 millisecond resolution is too coarse. It would be nice if it had microsecond resolution. From the TimeProfiler results, it seems that calling a JNI method with NativeBoost is extremely slow, but I don't trust those profiles too much. So, give it a try, and if you find something useful concerning the bad performance, please send me a message. Best regards, Joachim Geidel -- View this message in context: http://forum.world.st/ANN-JNIPort-for-Pharo-3-0-alpha-tp4750750.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Re: [Pharo-users] glorp
by Joachim Tuchel April 26, 2014

April 26, 2014

Hi, We're using Glorp on VA ST for kontolino.de. It is an active project in the sense of somebody is taking care of bugs. The lead developer(s) work(s) for Cincom - and Cincom uses Glorp as supported component of CST. Instantiations also provides Glorp with VA ST and supports it. Glorp is very stable and is not moving fast, which is not a disadvantage for a production system. Features are being added and bugs are fixed. Re: Pharoers do NoSQL: judging from the discussions on this list and others, you have to be careful what you need. To me it seems many developers want features from relational DBs and hammer them into their applications with brute force. The first wow! soon gives room to a lot of problems that have been solved in relational DBs three decades ago. But it is true that o/r mapping is not always fun. It can force you to make decisions about your model that look strange from the object perspective. I'd either go full objects (gemstone, magma) or relational for my typical projects (business apps). Hth Joachim ClÃ©ment Bera <bera.clement(a)gmail.com> schrieb: >Hello, > >I think Glorp is used with DBXTalk for relational databases by multiple >people. > >Usually, with Pharo, people use as a persistance layer either MongoDB with >the frameworks MongoTalk/Voyage. > >Gemstone is also used quite often for large scale application but Gemstone >is not free. > >Regards. > > >2014-04-23 20:34 GMT-07:00 Pablo R. Digonzelli <pdigonzelli(a)gmail.com>: > >> Hi all, can someone tell me if glorp is active there ar is using glorp or >> other persistence framework in production projects? >> >> Tia >> >> ------------------------------ >> *Ing. Pablo Digonzelli* >> Software Solutions >> IP-Solutiones SRL >> Metrotec SRL >> 25 de Mayo 521 >> Email: pdigonzelli(a)softsargentina.com >> pdigonzelli(a)gmail.com >> Cel: 5493815982714 >> >>

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Does something like or similiar to Redmine exist
by Friedrich Dominicus April 26, 2014

April 26, 2014

for Smalltalk also? Thanks for your ideas Regards Friedrich

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We need *you* for the upcoming Pharo's website
by Damien Cassou April 25, 2014

April 25, 2014

Hi everyone, we are working on a new website for Pharo! We need your help. If you have some time, please create and send us one of the following items: - An up-to-date screenshot of Pharo 3.0 that shows some cool features. It should be 800px wide ; - A screencast ; - A paragraph (around 40 words) that presents a nice topic about Pharo and a corresponding screenshot. We will select 1 large screenshot, 3 screencasts and 4 topic paragraphs. This could be a very nice way for you to contribute to Pharo! Best, -- Damien Cassou http://damiencassou.seasidehosting.st "Success is the ability to go from one failure to another without losing enthusiasm." Winston Churchill

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glorp
by Pablo R. Digonzelli April 24, 2014

April 24, 2014

Hi all, can someone tell me if glorp is active there ar is using glorp or other persistence framework in production projects? Tia Ing. Pablo Digonzelli Software Solutions IP-Solutiones SRL Metrotec SRL 25 de Mayo 521 Email: pdigonzelli(a)softsargentina.com pdigonzelli(a)gmail.com Cel: 5493815982714

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Probabilities package for Pharo?
by Sebastian Tleye April 24, 2014

April 24, 2014

Hi, I am doing some experiments in Pharo and I need to model Normal and Log-Normal distributions in pharo. Is there any existing package for that? Thanks in advance!

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[ANN] BabyMock 2
by Attila Magyar April 24, 2014

April 24, 2014

I'm pleased to announce the 2.0 version of BabyMock. BabyMock is a visual mock object library that supports test-driven development. This version has a new syntax which is incompatible with the old version. Therefore it has a new repository http://smalltalkhub.com/#!/~zeroflag/BabyMock2 (BabyMock 1 is still available at its old location, but in the future I'd to focus on the development of BabyMock2, so don't expect too many changes regarding the old version). Changes in 2.0 - A new, extensible DSL (no more should/can) - Improved error messages, history of messages, detailed information about argument mismatches - An improved, Spec based GUI - Clicking on a mock opens an inspector on the expectations - Clicking on a message opens an inspector on the message - Object methods can be mocked by defaults - Blocks can be executed after receiving a message by the mock. The block has access to the arguments of the incoming message. - Any argument matcher - Cleanups and simplifications in the code I hope you don't mind the changes regarding the syntax. Personally I think it has lot more pros than cons. More information http://smalltalkhub.com/#!/~zeroflag/BabyMock2 p.s. It needs Pharo3.0. Attila -- View this message in context: http://forum.world.st/ANN-BabyMock-2-tp4748530.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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