Welcome to the Jakarta Commons Wiki

We're a \[http://wiki.apache.org/jakarta/FrontPage Jakarta\] community, dedicated to creating reusable library components in Java. 

JakartaCommonsEtiquette contains observations and opinions aimed at explaining some of the peculiarities of Jakarta Commons.

GettingInvolved has information for people interested in helping out with commons development.

Jakarta Commons is now using \[http://subversion.tigris.org/ Subversion\] as version control system, more information can be found on the \[:UsingSVN\] page.

\[CommonsPeople\] \[ComponentPlans\] \[CommonsCommitters\]

Components

On this wiki:

• \[:BeanUtils\] - Utilities for manipulating java beans, including copying properties, cloning, invoking methods and type conversion.

• \[:Betwixt\] - Services for mapping JavaBeans to XML documents, and vice versa.

• \[:Chain\] - A "Chain of Responsibility" pattern implemention for organizing complex processing flows.

• \[:CLI\] - Command Line Interface library for processing command-line options and arguments.

• \[:Codec\] - General encoding/decoding algorithms. Includes some phonetic encoders, Hex, Base64, and a URL encoder.

• \[:Collections\] - Builds upon the Java Collections Framework of List, Set and Map to provide many more implementations, new collections and abstract base classes.

• \[:Configuration\] - Tools to assist in the reading of configuration/preferences files in various formats

• \[:DBCP\] - Database connection pooling services.

• \[:Digester\] - An XML-to-Java-object mapping utility commonly used for parsing XML configuration files.

• \[:FeedParser\] - RSS and Atom parsing infrastructure

• \[:FileUpload\] - Makes it easy to add robust, high-performance, file upload capability to your servlets and web applications

• \[http://wiki.apache.org/jakarta-httpclient/FrontPage HttpClient\] - A framework for working with the client-side of the HTTP protocol.

• \[:IO\] - Utility classes, stream implementations, file filters and endian classes to assist in input/output operations.

• \[:JEXL\] - A velocity-esque expression interpreter

• \[:Jelly\] - An XML-based scripting language

• \[:JXPath\] - Facilities for applying xpath expressions to graphs of objects of all kinds: Java beans, Maps, Servlet contexts, DOM etc.

• \[:Lang\] - Common utilities that should be provided by the JDK, including String handling, Object and Date helpers, nested exceptions and enumerated types.

• \[:Launcher\] - A cross platform Java application launcher which eliminates the need for a batch or shell script to launch a Java class.

• \[:Logging\] A thin, modular bridging API with out-of-the-box support for the most well known logging systems.

• \[:Math\] Lightweight, self-contained mathematics and statistics components.

• \[:Modeler\] Mechanisms to create Model MBeans compatible with the Java Management Extensions (JMX) specification.

• \[:Net\] - A collection of classes implementing various network protocols such as FTP, NNTP, SMTP, Telnet.

• \[:Pool\] - A generic object pooling interface, a toolkit for creating modular object pools and several general purpose pool implementations.

• \[:Resources\] - A lightweight framework for defining and looking up internationalized message strings.

• \[:Transaction\] - Utility classes commonly used in transactional programming

• \[:Validator\] - Components for user input validation

• \[:VFS\] - Extensible framework to acces various filesystems through an unified api with implementations for e.g. sftp, smb, http, zip, ... \\

On the commons site:

• http://jakarta.apache.org/commons/components.html
  

Sandbox

TheSandbox is an open workspace for jakarta committers. This is also divided into components.

On this wiki:

• \[:CommonsConvert\] - Various conversion ideas extracted from \[:BeanUtils\]

• \[:SCXML\] - A Java implementation of State Chart XML (SCXML), currently a W3C Working Draft.

• \[:CommonsCsv\] - Proposed new component \\

Third Party Resources

• \[JakartaCommonsResources\]

• \[http://morph.sourceforge.net Morph\] - alpha framework based on ideas from [BeanUtils] (\[http://morph.sourceforge.net/alternatives/beanutils.html read comparison to Morph\]), [CommonsConvert] and [CommonsChain]. Also will support functionality in \[:JEXL\] (\[http://morph.sourceforge.net/alternatives/jexl.html read comparison to Morph\]).

• \[http://www.nabble.com/Jakarta-Commons-f292.html Mailing list archive\] - \[http://www.nabble.com/ Nabble\] hosts a combined user/dev archive of the commons' lists. The archvie has a clean UI for cross browsing and also a fast search. Users can search here before posting questions to the mailing lists. \\

Articles

• \[http://www.devx.com/Java/Article/29392 Extend the JDK Classes with Jakarta Commons, Part I\] - Explore the components in the Jakarta Commons set of reusable classes and you'll be convinced that most of them should be part of the JDK. Learn which ones you should use in your projects. - \[http://www.narayanan.co.in/aboutme.html Narayanan A R\]

• \[http://www.devx.com/Java/Article/29795 Extend the JDK Classes with Jakarta Commons, Part II\] - This second installment of a three-part series further explores components in Jakarta Commons and presents real world examples to demonstrate how you can use them in your projects. - \[http://www.narayanan.co.in/aboutme.html Narayanan A R\]

• \[http://www.devx.com/Java/Article/30117 Extend the JDK Classes with Jakarta Commons, Part III\] - Explore Jakarta Commons components that enable you to parse arguments in a command-line application, connect to various file systems at the same time, allow an application to uniformly access configurations loaded from various sources, and pool any object. - \[http://www.narayanan.co.in/aboutme.html Narayanan A R\] \\ \\

Developer Documentation

• A CommonsManual.
  
• MovingComponents (sandbox graduations have additional requirements - also see related links below)
  
• MovingFromSandboxToProper

• \[:MovingFromSandboxToProperSVN\] \\

• CreatingStandardWebPresence
  

• [GettingInvolved] - General Documentation for all Apache Commiters and [ReleaseManager] concerning various subjects (like [SigningReleases], [MavenRepository], and \[:Mirroring\]) \\

• ComponentTemplate - Use this template when creating the main wiki page for a component.
  
• AutomatedIdeas - some ideas on how increased automation could help us (HenriYandell)
  
• SubversionConversion - a proposed set of svn instructions for infrastructure.
  
• CreatingSiteWithMaven2 - a trial to see if it is possible to use Maven 2 to build commons sites.

*Q:* Little request: Can we PLEASE have a single javadoc tree for all commons components?  
I am getting tired of switching between dbcp, loggin, and pool.  
Especially when I am following one line of calls or inheritance.  
Thanks, Angus

*A:* Sure, it should be relatively easy, why not take some initiative and do it yourself?

Proposed solution: \[http://www.apache.org/~bayard/multidoc/commons-multidoc/ Multidoc\]

'Special' Wiki pages

See SpecialWikiPages for a basic guide to using this wiki, a full-text search of this wiki, a title index, orphaned and random pages, stats, and information about this wiki installation and available extensions.