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<document>
<properties>
<author email="pete@kazmier.com">Pete Kazmier</author>
<author email="mpoeschl@marmot.at">Martin Poeschl</author>
<author email="jason@zenplex.com">Jason van Zyl</author>
<author email="epugh@upstate.com">Eric Pugh</author>
<author email="tobrien@discursive.com">Tim O'Brien</author>
<author email="rgoers@apache.org">Ralph Goers</author>
<title>Java Configuration API</title>
</properties>
<body>
<section name="Intro">
<p>
The Commons Configuration software library provides a generic configuration interface which enables
a Java application to read configuration data from a variety of sources. Commons Configuration
provides typed access to single, and multi-valued configuration parameters as demonstrated
by the following code:
<source><![CDATA[
Double double = config.getDouble("number");
Integer integer = config.getInteger("number");
]]></source>
</p>
<p>
Configuration parameters may be loaded from the following sources:
<ul>
<li>Properties files</li>
<li>XML documents</li>
<li>Windows INI files</li>
<li>Property list files (plist)</li>
<li>JNDI</li>
<li>JDBC Datasource</li>
<li>System properties</li>
<li>Applet parameters</li>
<li>Servlet parameters</li>
</ul>
Different configuration sources can be mixed using a <code>ConfigurationFactory</code> and
a <code>CompositeConfiguration</code>. Additional sources of configuration parameters can
be created by using custom configuration objects. This customization can be achieved by
extending <code>AbstractConfiguration</code> or <code>AbstractFileConfiguration</code>.
</p>
<p>
The full Javadoc API documentation is available <a href="apidocs/index.html">here</a>.
</p>
</section>
<section name="Latest Release">
<p>
The latest release of Apache Commons Configuration is available from the
<a href="http://commons.apache.org/configuration/download_configuration.cgi">Apache download area</a>.
It is also available from the <a href="http://repo1.maven.org/maven2/commons-configuration/commons-configuration/">Maven repository</a>.
The <a href="changes-report.html">Changes Report</a> explains all of the changes and bug fixes that have been made.
</p>
</section>
<section name="History">
<p>
Commons Configuration started as code in Apache JServ. The JServ code was subsequently
added to <a href="http://jakarta.apache.org/turbine">Jakarta Turbine</a>. After Jakarta
Turbine, this configuration interface moved to <a href="http://jakarta.apache.org/velocity">Jakarta Velocity</a>
and underwent various improvements. After Velocity, this code was introduced to the
<a href="http://commons.apache.org">Apache Commons</a> as <code>ExtendedProperties</code>.
Configuration began life in the Commons as a Sandbox component, and was promoted to the
Commons Proper in late 2003.
</p>
</section>
<section name="Bugs">
<p>
Bugs may be reported via the <a href="http://issues.apache.org/jira/browse/CONFIGURATION">ASF JIRA</a>
system. Detailed information can be found on the <a href="issue-tracking.html">issue tracking page</a>.
</p>
</section>
</body>
</document>