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Framework (CMS 1.5 and 1.6)

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Revision as of 06:23, 7 September 2008 by Chris Davenport (Talk | contribs)

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A software framework is a reusable design for a software system (or subsystem). This is expressed as a set of abstract classes and the way their instances collaborate for a specific type of software. Software frameworks can be object-oriented designs. Although designs don't have to be implemented in an object-oriented language, they usually are. A software framework may include support programs, code libraries[1], a scripting language[2], or other software to help develop and glue together the different components of a software project. Various parts of the framework may be exposed through an application programming interface (API).
From Wikipedia

Joomla! Framework

Joomla! 1.5 is a three tiered system. The bottom tier is the framework level and consists of the libraries and plugins (formerly known as mambots). The second tier is the application level and consists of the JApplication class. Currently there are four[3] applications that ship with Joomla: JInstallation, JAdministrator and JSite. The application acts as the main controller for the page.

The third tier is the extension level. This level is where all component, module, and template logic is executed and rendered.

Application Constants

Each application type defines several constants:

JPATH_ROOT          The path to the installed Joomla! site
JPATH_SITE          The path to the installed Joomla! site
JPATH_CONFIGURATION The path to folder containing the configuration.php file
JPATH_ADMINISTRATOR The path to the administrator folder
JPATH_XMLRPC        The path to the XML-RPC Web service folder
JPATH_LIBRARIES     The path to the libraries folder
JPATH_PLUGINS       The path to the plugins folder
JPATH_INSTALLATION  The path to the installation folder
JPATH_THEMES        The path to the templates folder
JPATH_CACHE         The path to the cache folder
JPATH_COMPONENT     The path to the current component being executed

These constants are defined in _path_/includes/defines.php

Packages and Classes

The classes in the Joomla! Framework are loosely grouped into several different packages.

Application

Base

Cache

Client

Database

Document

Environment

Error

Event

Filesystem

Filter

HTML

Installer

Language

Mail

Plugin

Registry

Session

Template

This package is deprecated. Template extensions are part of the Document package now.

User

Utilities

See also

  1. PHP libraries bundled with Joomla!
  2. JavaScript libraries bundled with Joomla!
  3. The fourth, "hidden" application is the XMP-RPC server.