Hi
We are around 30 developers doing J2EE developement in my company.
When building with either ant or maven, a large part of the time consumed is by
generating code using various tools, such as ejbgen, xjc, wsgen etc. and the
following compilation.
To deal with this I have created a simple plugin that writes a serialized cache
to a specified location, containing any cached directories/attributes.
When performing a build, this cache is loaded and compared to the present values,
and only if changes has been applied, the defined build process starts.
Here is an example jellyscript:
<cache:load path="${maven.build.dir}/gen/xjc/build.cache">
<cache:compare key="src" dir="${maven.src.dir}/xsd" includes="*.xsd"/>
<cache:compare key="xjcVersion" value="${xjcVersion}"/>
<cache:modified>
<xjc extension="true" target="${maven.build.dir}/gen/xjc"
package="foo.ejb.dao.xml.webservice.events.param">
<schema dir="${maven.src.dir}/xsd" includes="*.xsd"/>
</xjc>
</cache:modified>
</cache:load>
The above shows a simple example of using the cache-plugin, only when xsd files
are changed in the defined srcdir or when the xjc-version(read from POM
dependencies) are changed, the xjc task are performed.
The cache can take any number of directories/attributes and store/compare.
This simple plugin, based on the org.apache.tools.ant.DirectoryScanner, actually
saves 2-3 minutes buildtime in my current project !
I will be happy to contribute it to the maven core-plugins, if you guys are
interested.
Regards
Brian Pedersen
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