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Avalon Framework 4 0 Released

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Daniel Cody

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User since: 14 Dec 1998

Articles written: 146

The Avalon project is Apache's Java Server Framework which is separated into six sub projects: Framework,

Excalibur, LogKit, Cornerstone, Phoenix, and Testlet.

Its purpose is to simplify server-side programming

for Java based projects and formalize several

best of breed practices and patterns for server side

programming.

About Avalon Framework 4.0

The Avalon Framework formalizes the contracts and

patterns used in the other Avalon projects. It is

derived from modern software engineering techniques

and aims to provide a solid basis on which to build

server products.

In other words, the Avalon Framework provides:

  • Ready-to-use design patterns.
  • A higher level of abstraction than OOP.
  • Implementations of common components.

ChangeLog for Avalon Framework 4.0


  • Added new method to Component Manager and Selector

    for discovering if a Component exists inside or not.

    Also augmented the default versions with the basic

    implementation to discover them. [BL]
  • Added stylesheet to convert Stylebook markup to DocBook markup. [BL]
  • Changed the documentation build process to use Cocoon to build the site. [BL]
  • Added new "Developing with Avalon" book in DocBook format. [BL]
  • Added Executable interface to activity package. [PD]
  • Updated Resolvable interface to allow a ContextException to be thrown on failure. [PD]
  • Add a makeReadOnly() method to the default implementations

    of Configuration, Context and ComponentManager.

    Calling this method after the respective object

    has been filled will make the object read-only. This

    is a safety precaution to stop code performing unwanted

    operations. [PD]
  • Updated the javadocs of many of the classes. [PD]
  • Update documentation so that it is more accurate and descriptive. [BL]

Downloads for Avalon Framework 4.0 and more information about the Avalon project are available at

href="http://jakarta.apache.org/avalon" target="_new" title="Opens in new window">the Avalon project website.

Dan lives a quiet life in the bustling city of Milwaukee, WI. Although he founded what would become evolt.org in 1998, he's since moved on to other projects and is now the owner of Progressive Networks, a Zimbra hosting company based in Milwaukee.

His personal site can be found at http://dancody.org/

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