Spoon May 2007

spoon@lists.squeakfoundation.org

2 participants
4 discussions

How do I create a minimal memory?
by Trygve Reenskaug 06 Jul '07

06 Jul '07

Hi, I have just entered this list because I want to find out how I can use Spoon for my next BabyUML experiment. README: /Double-click the "spoon.bat" file. This will start the Spoon processor, which starts a local web server. /OK/ In the "naiad" folder are components for remote browsing and inspecting of the Spoon memory from a Squeak 3.9 system (they probably work with earlier systems as well). To use them, first start the Spoon system as described above. /OK /Then start the "naiad" application with the object memory of your choice. /Squeak3.9/naiad OK/ Then, file in "naiad.st", and load the "naiad.pr" project. /OK. Poject with violet playfield (nice :-) ) and a workspace. /"Hi; here are a few expressions to get you started with remote browsing." "Make sure you've filed in 'naiad.st' first." Smalltalk at: #ExampleWormholeServer put: (WormholeServer atPort: 9999). /Looks OK/ // / "/Make sure you've started the minimal memory first." ExampleWormholeServer connectToPort: 7777 atHostNamed: 'localhost'./ Fails. Executing the expression hangs with Wormhole>>peer being nil. The Spoon image is open in a window, but that window is empty and I cannot find any menus or command lines. *Perhaps I should start the /minimal memory/ first, but how?? * I'm not good at reading instructions, so I may have missed something. Any pointer will be welcome. Thanks --Trygve This is exciting! --Trygve -- Trygve Reenskaug mailto: trygver(a)ifi.uio.no Morgedalsvn. 5A http://folk.uio.no/trygver N-0378 Oslo Tel: (+47) 22 49 57 27 Norway

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Spoon progress 2007-05-22: behavior archives
by Craig Latta 23 May '07

23 May '07

Hi-- I've just started following up on an idea I mentioned a while ago, a mechanism for storing and restoring past versions of methods and classes. It effectively replaces the traditional changes and sources files, and is used by the module system to perform module unloading. When a system wants to store a method or class (for example, when it is about to overwrite an old method with a newly-compiled version), it makes a request via remote message to an entirely separate object memory dedicated to archival (which may also perform archival for any number of other systems). Methods, classes, and metadata about them (such as author and source code) are stored as objects. The archival system snapshots itself after every addition (not a big deal since it's relatively small). I think having a real system available to help with version browsing and crash recovery, as opposed to a text file, will be a lot more powerful. Modules use the archival system during loading to keep track of the components they happen to replace (old methods and classes). Each module creates an "antimodule" which, when installed, reverts the system to the way it was before installing the module, drawing upon the old components stored in the archive. Note that the antimodule for a given module varies depending on the state of the system into which it is installed. This seems to highlight the advantage of using live negotiating objects to convey behavior, rather than static files. As always, I very much welcome questions and feedback! The Spoon project website is http://netjam.org/spoon/. thanks, -C -- Craig Latta improvisational musical informaticist www.netjam.org Smalltalkers do: [:it | All with: Class, (And love: it)]

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Spoon progress 2007-05-17: online module searches with Naiad
by Craig Latta 18 May '07

18 May '07

Hi-- I've successfully performed a search for online modules with Naiad (Spoon's module system). The links in the initial Spoon welcome webpage now include a "search" link. When you click on it, you get a page with a form on it, with an input field for each module attribute (id, name, author, summary, description, version, license, date, and website) and a "submit" button. You can fill in each field with a pattern to match (e.g., "*ello*orld"). When you click the button, the local Spoon system creates a filter from the form's information, and collects descriptions of all the matching modules from all the module-serving remote Spoon systems that are online at the time. From these descriptions, the local Spoon system creates a webpage summarizing each matching module, including Naiad links. When you click on a Naiad link for a module, the module is installed from a system serving it. Any Spoon system can register itself as a module-serving system by contacting one of several root servers, whose contact information is hardwired into the release (perhaps supplemented in the future by info from public web search engines). For offline sources of modules, I imagine authors will create web pages that get indexed by public web search engines. Clients would then simply download entire object memory snapshots and install modules from them locally later, without using the wide-area network. The set of Naiad module servers currently consists of a single machine (metronome.netjam.org), with one trivial module available. Soon I'll be looking for volunteers who can make additional machines available to join the set. In general, I imagine there will be a handful of well-connected, always-on machines that can serve most of the popular modules, and many personal machines which intermittently serve works-in-progress. A new release is coming soon, so you can try all this out. Once this stuff is working for everyone, we can distribute the task of creating modules for turning Spoon into something widely useful (e.g., "Squeak 4"). thanks again, -C -- Craig Latta improvisational musical informaticist www.netjam.org Smalltalkers do: [:it | All with: Class, (And love: it)]

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[Fwd: Compiling my own VM]
by Tony Garnock-Jones 01 May '07

01 May '07

Hi all - this didn't seem to make it through to the list, so reposting :-) Regards, Tony

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Spoon May 2007