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Part I:: Integrating Velocity into AppFuse - A HowTo for adding the Velocity Templating engine to AppFuse applications for rendering views.

About this Tutorial

This tutorial will show you how to modify the Ant build script to include Velocity into the build cycle for AppFuse.

Table of Contents

  • [1] Download the prerequisite packages
  • [2] Add the packages to AppFuse's lib structure
  • [3] Modify the build script to include the packages
  • [4] Add the ViewServlet definition
  • [5] Configure the Toolbox and Velocity Engine
  • [6] Modify an ActionForward to send to Velocity

Download the prerequistie packages [#1]

First we need to get our hands on the VelocityTools packages. These are available from the Jakarta Apache Project.

Personally I used Velocity-Tools-1.0-bin, from here.

Add the packages to AppFuse's lib structure [#2]

The main distribution comes with all sorts of other things, including sample applications, that we don't need. We will extract the precompiled JARs (or make them if you were brave and got a source distribution). The ones we're interested in are the ones that start "velocity-". All of the other dependencies are already in AppFuse.

We now need to add this to the the lib folder in your AppFuse source tree. Create a directory lib/velocity-tools-1.0.

Now add the following to lib.properties


# Velocity View Tools - http://jakarta.apache.org/velocity/tools/
#
velocity.version    = 1.0
velocity.dir=${lib.dir}/velocity-tools-${velocity.version}

Modify the build script to include these packages [#3]

Now that AppFuse is aware of the new libraries, we need to include them in the build process. Those of you scared of ant build scripts look away now.

We must modify the package-web target, to add the following to the lib directives for the war task:
So the full war task definition becomes thus: 

>war
            basedir="${webapp.target}" 
            destfile="${webapp.dist}/${webapp.war}"
            webxml="${build.dir}/web/WEB-INF/web.xml"
            excludes="**/web.xml,**/hibernate.properties,**/web-test.xml,
                      **/mail.properties,**/cactus.properties"
            compress="true"<
            
            >classes dir="${build.dir}/web/classes"/<
            
            >lib file="${dist.dir}/${webapp.name}-common.jar" /<     
            >lib file="${dist.dir}/${webapp.name}-ejb.jar" /<
            
            >webinf dir="${struts.dir}" includes="*.xml"/<
            >lib dir="${struts.dir}" includes="*.jar"/<
            >lib dir="${jstl.dir}/lib"<
                >include name="jstl.jar"/<
                >include name="standard.jar"/<
            >/lib<
            >lib file="${log4j.jar}"/<      
            >lib file="${strutsmenu.jar}"/<
            >lib file="${displaytag.jar}"/<
            >lib file="${hibernate.jar}"/<
            >lib dir="${hibernate.dir}/lib"<
                >include name="odmg.jar" /<
                >include name="dom4j.jar" /<
                >include name="cglib*.jar" /<
                >include name="ehcache.jar" /<
                >include name="oscache*.jar" /<
            >/lib<
            >lib file="${statetag.jar}"/< 
            >lib file="${countrytag.jar}"/<
            >lib file="${clickstream.jar}"/<
            >lib dir="${velocity.dir}"<
            	>include name="*.jar" /<
            >/lib<
        >/war<


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This particular version was published on 06-Nov-2006 13:52:27 MST by 217.158.192.171.