Joomla2.0 architecture

Joomla! 2.0 Architecture J and Beyond May 6, 2011 Herman Peeren www.yepr.eu herman@yepr.nlFilip Dujardin: Crazy Building 6

Software Architecture• structure of the whole• under the hood

Extending what you have...starting small:building more• more and more• knitting...• more• and more• and even more James Wines: Highrise of Homes (1981)

and more...Hundertwasser

Until the past becomes a burden Giovanni Francesco Barbieri Guercino: Atlas (1646)

Example: Joomla! 1.6 ACL• earlier Access Control for editing: /administrator-folder• earlier Access Control for viewing: restricting menu- and article access for groups• newer ACL while keeping the old structures

After:• 1.5• 1.6• 1.7• 1.8• 1.9• 1.10• ...• 1.98 ...it might be time for aMajor release: . N.B.: no major version forseen in framework version numbers (11.1 etc.)

Not even the sky is the limit!Andrea Pozzo: trompe l’oeil, fresco, St. Ignazio, Roma

some books:both from 2003...

Conversion to OOP DDD ORM TDD COC WTF Caravagio: the Conversion of St. Paul (1601)

Back to the OOP-basics • Simula (1960s); e.g. simulation of waiting queues • no division between data and behaviour: objects! • smaller problems that can be handledNelleke Verhoeff: Ellenlange Schlange (2003)

Layers• 3 main layers: presentation, domain, data• OOP: domain layer is central (DDD) Mark Rothko

ORM• Object - Relational Mapping• Frameworks. Java: Hibernate. PHP: Doctrine (2)• Doctrine a.o. used in Zend, Symfony etc.• Can be used in Joomla! (JCM-article)• http://www.doctrine-project.org

aside: LINQ... for PHP• SQL for recordsets in .NET (Language Integrated Queries)• PHP, open source: http://phplinq.codeplex.com/• mainly targeting Recordsets (but could be generally useful for Table Data Gateways)• Doctrine uses DQL (like SQL, but querying objects, not tables)

MVC? • How does our Holy Trinity MVC fit into this story?Antonio de Pereda (1611-1678): Holy Trinity

MVC and layers• invented 1978/1979• originally in the presentation layer• now: scattered over layers• or: instead of layers Prof. Trygve M. H. Reenskaug (Oslo)

← MVC in presentation layer

MVC everywhere...

Naked Objects• PhD thesis Richard Pawson 2004 (Dublin, Ireland)• http://downloads.nakedobjects.net /resources/Pawson%20thesis.pdf• Foreword by Trygve Reenskaug• back to ‘behaviourally-complete’ objects! Hans Memling: Vienna Triptych Enthroned Madonna (1485), closed

NakedPHP• a framework to implement Naked Objects in PHP• by Giorgio Sironi• http://giorgiosironi.blogspot.com/2009/07/naked-objects-in-php.html• http://sourceforge.net/projects/nakedphp/ (LGPL)Adolf Ziegler: The Four Elements: Fire, Water and Earth, Air (before 1937)

Experiments from the lab• System-U: all objects only a uniform interface as public methods• System-R: recources as basic objects• System-A: Access control as feature in basic objects• agregate MVC: class com_mycontents extends com_contentsPiet Mondriaan (1872-1944): tree, more and more abstract

Joomla! 2.0 could have:• DDD and ORM• database independency• better integrated ACL, no /administrator RESTful interface ...and be:• • Extendable API UP -TO -D AT E! Vangobot: Skyscrapers Architecture Pop (http://popartmachine.com/)

“Creativity requires the courage to let go certainties” Erich FrommSergey Tyukanof (http://www.tyukanov.com/): Alice in Wonderland (2005)

Who joins this dance?• goal: to work towards a new major versionHenri Matisse: La Danse (1910)

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Joomla2.0 architecture

by Herman Peeren on May 09, 2011

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