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Acoda.WebHomer1.11 - 28 May 2009 - 14:57 - SanderVermolen

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Software is constantly in motion. Bugs are fixed, new features added, current features improved and architectures improved. Being the core of most applications, data models do not escape continuous changing. As software is in use, it gathers and stores data, following a data model structure. When a data model is updated, persistent data is may no longer be readable and is lost.

To cope with changing data models, data migration can transform old data to adhere the new rules set by an updated data model. Data migrations are tedious to construct, bug-sensitive and are needed for every new version of the data model, requiring a significant effort in development focused on changing the data model as less as possible and an infeasible manual effort in agile development.

Automating Data Model Evolution

Acoda automatically migrates data along an evolving data model. Input to Acoda are two versions of a data model and a database. Acoda automatically detects what was changed from one data model to the other and changes a copy of the data accordingly. Output is a ready-to-use database dump adhering the latest data model version.

Acoda is built for object oriented data models, but works equally well for relational data models. It supports arbitrary types of primitive attributes, type inheritance, object relations, abstract types, sets, lists, attribute cardinalities (including mandatory) and inverse relations. The changes Acoda supports include: attribute and type renaming, attribute moving, changing attribute types, resolving implicit references, wrapping attributes, introducing uniqueness and changing attribute cardinalities.

News

20 May 2010 Integrated the SQL migration generator into the Acoda plugin, one click away...

16 May 2010 A database migration script generator now generates SQL migrations from an evolution specification.

11 February 2010 Acoda now has an issue tracker at: http://yellowgrass.org/project/Acoda

4 February 2010 Started a case study on designing an issue tracker http://yellowgrass.org using Acoda in purely agile development

29 January 2010 A first (alpha) version of the Acoda Eclipse plugin is finished. Currently bugfixing it.

17 June 2009 Acoda is now also available as Nix package. See Installation for more details.

28 May 2009 Acoda has a logo!

28 May 2009 Filled in most of the basic content on the web page and started an online manual

27 May 2009 Acoda recieved its name and a brand new web site. More text to come soon...

Acoda support

Acoda is a project from the Software Engineering Research Group of Delft Technical University of Technology. It is supported by NWO/JACQUARD project 638.001.610, MoDSE on Model-Driven Software Evolution.




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