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Three 'Best' Persistent Model Patterns Announced



ODBMS.ORG, a vendor-independent not-for-profit educational program for object database technology, has announced the "best" Persistent Model Patterns, according to a vote by ODBMS.ORG readers. The three best voted persistent patterns among the 25 submissions received are:

  • Bespoke Indexes, by Adrian Marriott, Principal Consultant, Progress Software. This pattern is for programs that require the absolute maximum of performance and scalability it is necessary to write programs that utilize novel data structures and new algorithms designed with detailed knowledge of the specific problem context. Support the most critical use-cases of your system directly with bespoke persistent index structures that optimize read and write operations across the objects used by those use-cases.

  • Query Visitor, also by Adrian Marriott, Principal Consultant, Progress Software. This pattern represents a query to be performed on the elements of a persistent object structure. Query Visitor allows you to define new result set formats without changing the underlying persistent object model, and avoids polluting the persistent classes with rendering logic.
  • Schema Builder, by Richard Lingeh, Principal Consultant, Versant. This pattern allows any further evolution of a database after a complete modification of the client application model to be done by a separate schema process and not by the client application or by the schema it generates. This separate process generates a database schema that matches the complex evolving client application model.

All 25 persistent patterns that were submitted as part of the project are available for free download here.

Mr. Marriott and Mr. Lingeh will be acknowledged at a special awards ceremony at the International Conference on Object Databases (ICOODB) 2009 conference in Zurich.


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