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The Squeak Environment. Smalltalk Run-Time Architecture. Virtual Machine + Image + Changes and Sources Image = bytecodes Sources and changes = code (text). Runtime Architecture. The byte-code is in fact translated into native code by a just-in-time compiler. - PowerPoint PPT Presentation
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Stéphane [email protected]://www.listic.univ-savoie.fr/~ducasse/
The Squeak Environment
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License: CC-Attribution-ShareAlike 2.0http://creativecommons.org/licenses/by-sa/2.0/
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Smalltalk Run-Time Architecture• Virtual Machine + Image + Changes and Sources
• Image = bytecodes• Sources and changes = code (text)
A byte-code interpreter:the virtual machine interpretes the imageIMAGE2.IMIMAGE2.CHAStandard SOURCESShared by everybody
IMAGE1.IMIMAGE1.CHAAll the objects of the systemat a moment in time
One per user+
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Runtime Architecture• The byte-code is in fact translated into native
code by a just-in-time compiler.
• The source and the changes are not necessary for interpreting the byte-code, this is just for the development. Normally they are removed for deployment.
• An application can be delivered as some byte-code files that will be executed with a VM. The development image is stripped to remove the unnecessary development components.
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Mouse Semantics
SelectOperateWindowRed BlueYellow
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World Menu and Open Menu
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Browsing a class
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Browsing methods
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Inspector• To look inside objects• Violates encapsulation!!!• Monster new inspect
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Direct Manipulation• Bring the halo• Experiment
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Debugger?
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Debugger !!!
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FileList
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Message Names Finder
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Methods in ChangeSets + Versions
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Preferences
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SUnit
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Transcript is Sloooooooooooow
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Squeak Map Package Loader
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Monticello
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Monticello Change Browser
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Repository
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SqueakSource
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Changes Menu…Recently logged files• Everything you do is recorded
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ChangeSorter: to sort your changes
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Cool Packages to LoadShoutRefactoring BrowsereCompletion
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Change your MindEverything you do is recorded !!So try and learn how to recover your code
You are smart so Experiment, Learn for you, browse, educate your taste (not all Squeak code is good)Be aggressive, ***all*** the code is there
