PD 2 Plone Driven Plone Development Henning Rietz, Condat AG Plone Conference 2009 Budapest, 29.10.2009 IT from Berlin

What it means Model driven development The model is Plone content Code generation by using views on this content  (Code is just a view on a domain model.)

Model driven development

The model is Plone content

Code generation by using views on this content

 (Code is just a view on a domain model.)

What we don‘t like Writing boilerplate code Editing *.zcml, *.xml Migration migraine (Plone 2  3  4  …) Learning curve for new developers

Writing boilerplate code

Editing *.zcml, *.xml

Migration migraine (Plone 2  3  4  …)

Learning curve for new developers

What we love Plone Model driven development ArchGenXML Application of design patterns

Plone

Model driven development

ArchGenXML

Application of design patterns

What we did – Set up Domain model (meta model) in UML Describes all the concepts of site development Site, Section, Page, Viewlet, Type, Attribute, Form, DBTable etc. Layout model Concepts / structures for the code generation File, Directory, FileSeries, FileGroup, etc. Model  AT Content (using ArchGenXML) PageTemplates, DTML Templates for code generation, using domain model objects as contexts

Domain model (meta model) in UML

Describes all the concepts of site development

Site, Section, Page, Viewlet, Type, Attribute, Form, DBTable etc.

Layout model

Concepts / structures for the code generation

File, Directory, FileSeries, FileGroup, etc.

Model  AT Content (using ArchGenXML)

PageTemplates, DTML Templates for code generation, using domain model objects as contexts

What we do – daily work Model lives in ZEO server Developers work with local ZEO Client, which writes to local file system Describe customer site in terms of the domain model Push the button Make customer specific extensions Iterate

Model lives in ZEO server

Developers work with local ZEO Client, which writes to local file system

Describe customer site in terms of the domain model

Push the button

Make customer specific extensions

Iterate

What PD 2 does for you Generates .py, .pt, .cpt, .cpy, .xml, .sql, .zcml Model can be accessed (and changed!) at runtime for generic parts Homogenous environment, easy to extend Makes your design patterns explicit Helps new developers to become productive very fast Prepares you for major changes in Plone architecture (e.g. AT  Dexterity) Integrates different technologies in a single model Documentation  Henning Rietz, hr@condat.de

Generates .py, .pt, .cpt, .cpy, .xml, .sql, .zcml

Model can be accessed (and changed!) at runtime for generic parts

Homogenous environment, easy to extend

Makes your design patterns explicit

Helps new developers to become productive very fast

Prepares you for major changes in Plone architecture (e.g. AT  Dexterity)

Integrates different technologies in a single model

Documentation