Magma March 2010

magma@lists.squeakfoundation.org

5 participants
4 discussions

Object IDs vs relational keys?
by Amir Ansari 18 Mar '10

18 Mar '10

>From my background reading on object databases: "A relational database represents data relationships by having matching primary key-foreign key data. There are no data structures within the database that form links between the tables; the relationships are used as needed by joining tables. In direct contrast, a pure object-oriented database 'hard codes' its relationships by including object identifiers within an object to indicate other objects to which it is related." (Object-Oriented Database Design, Jan L Harrington, Chapter 3) I've pored over the Magma documentation and mailing list, but couldn't find any explicit discussion of object identifiers in this context. I understand that Chris is loth to use OIDs (http://lists.squeakfoundation.org/pipermail/magma/2005-August/000027.html), so what's the alternative? What is the Magma analog of 'joining' tables using primary/foreign keys? Amir

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[ANN] ConfigurationOfMagma for Magma 1.0r44
by Miguel Enrique Cobá Martinez 15 Mar '10

15 Mar '10

I'm pleased to announce that the ConfigurationOfMagma now includes support to load version 1.0r44 of Magma. In a Pharo or PharoCore 10515 RC3 image evaluate: Gofer it squeaksource: 'MetacelloRepository'; package: 'ConfigurationOfMagma'; load. In Squeak, using Monticello browser add package ConfigurationOfMagma from repository http://www.squeaksource.com/MetacelloRepository Then in Pharo and Squeak, evaluate in a workspace for getting Magma Client: (ConfigurationOfMagma project latestVersion) load: 'Client' for getting Magma Server: (ConfigurationOfMagma project latestVersion) load: 'Server' for getting Magma Tester: (ConfigurationOfMagma project latestVersion) load: 'Tester' Then if you want, run the test suite. Evaluate in a workspace: MagmaTestCase allowWriteBarrier: false. MagmaTestCase fullSuite maDebug. Cheers -- Miguel Cobá http://miguel.leugim.com.mx

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[grow] Process for developing and building images on all forks
by keith 15 Mar '10

15 Mar '10

Hi All, The news is that Magma now loads into Cuis, collecting a couple of missing things it needs on the way. It only takes 20 seconds to load everything. I admit that I haven't tested if it actually works yet, but I am happy it loads. "grow" is a new process for loading things into all your favourite images, you can see grow in action with the screeencast (link available here): Grow also loads the same magma distribution into trunk, squeak4.0, and pharo. Again, no guarantees that it actually works yet. http://smalltalkers.pbworks.com/Innovating-ALL-Smalltalks regards Keith ==== The series.st file I am using to load magma(testing) is as follows: InstallSeries addSource: 'library/base-dev'. InstallSeries addSource: 'base-dev'. Install load: 'library/magma/magma-server.st'. InstallSeries addTheTests

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[ANN] Magma 1.0 release 44
by Chris Muller 03 Mar '10

03 Mar '10

I am pleased to announce the immediate availability of Magma 1.0 release "44" for both Squeak, 3.9, 3.10 and Pharo. Although I am looking into alternatives for future releases, for now I am still distributing Magma in my traditional ways: - On SqueakMap - three one-click installable packages. - In the "1.0r44" Monticello Configuration in the "Magma" project of squeaksource, there are three one-click installable configurations (client, server, tester). - The "r44Final" Monticello Configuration in the "MagmaTester" project of squeaksource is the one-click installable MagmaTester package. As has always been the case, ONLY ONE of the three packages needs to be installed, the full and proper configuration is loaded with one-click. Compared to r43, this is mostly a maintenance release without any major new functionality, but with improved robustness in the HA and luxury querying as well as several other fixes. Here are the specific improvements over 43: - Made several HA fixes and improvements, many identified by Bart Gaquie by testing with more than a two-server Magma Node. Many thanks Bart. - Updated MaQueryExecutor>>#fractionComplete to answer an unreduced Fraction instead of a reduced one. This convey's more information; since the denominator represents the total number of elements in the final result. Thanks again to Bart Gauqie. - Upgraded MagmaCollectionReader>>#release to allow give a well-behaved application much freer access to the "luxury" query features of MagmaCollections. It is essential for applications employing luxury query features of Magma for ad-hoc querying, to #release the Reader returned from the query so that resources on the server can be freed. - Now properly truncating the applied.images file, so it doesn't grow and grow.. - Now, when a repository is opened locally, if it's location has never been set (new repository) or was a different *local* location, then update it to the new aMagmaLocalLocation. If it was formerly a network-hosted server, do not update since we could be here simply just for re-opening that repository. So, to go from a remote repository to a local one, you have to manually update the node's primaryLocation. - Server no longer allows any clients to log in with the system name, since it is sometimes checked for special-purpose server housekeeping. - Updated MagmaSession's standard printing method, again! - Added MagmaCollectionReader>>#sortBy:makeDistinct:descending: and #sortBy:makeDistinct:descending:. - Made MaRepositoryDisconnectRequest asynchronous, it now returns considerably faster! - Fix for a recent MagmaCollection optimization. - Removed hard-reference to OSProcess. - Patch for #removeListener to avoid DependentsArray problem. - Fixed a ReadStrategy regression.

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Magma March 2010