Installing POI and iText as modules on WildFly

If you plan to use POI and iText across several applications of yours, then why not installing them as a module with WildFly ?
Create the following structures under the modules folder:

+---org
     +---apache
         +-----poi
              +-----main
                    module.xml
                    poi-3.17.jar

Then, define Apache POI module.xml:

<module xmlns="urn:jboss:module:1.1" name="org.apache.poi">
    <properties>
        <property name="jboss.api" value="private"/>
    </properties>
    <resources>
        <resource-root path="poi-3.17.jar"/>
    </resources>

    <dependencies>
        <module name="javax.api"/>
        <module name="org.apache.commons.logging"/>
    </dependencies>
</module>

Create the iText module path as well:

+---com
      +----lowagie
           +----itext
                +-----main
                      module.xml
                      itext-2.1.7.jar               

And the corresponding module.xml

<module xmlns="urn:jboss:module:1.1" name="com.lowagie.itext">

    <properties>
        <property name="jboss.api" value="private"/>
    </properties>

     <resources>
        <resource-root path="itext-2.1.7.jar"/>
    </resources>
    <dependencies>
    </dependencies>

</module>

Fine, now the last thing to do is setting the application dependencies into the META-INF/MANIFEST.MF file:

Manifest-Version: 1.0
Dependencies: org.apache.poi com.lowagie.itext export

Great. Now your WildFly is able to use iText and POI libraries as a module.

 Last thing to note: the current release of Primefaces libraries refers to an older release of iText. If you try to install the latest iText distribution you will end up to the following error: java.lang.NoClassDefFoundError: com/lowagie/text/
This is due to the fact that in the recent iText release the package com/lowagie/text has been renamed as com/itextpdf/text. So until this is fixed use the suggested iText release (2.1.7) or at least verify the package structure.

You can find the code from this PrimeFaces Exporter Demo here. Enjoy it !