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__Part I:__: [Integrating Velocity into AppFuse|AppFuseVelocity] - A HowTo for adding the Velocity Templating engine to AppFuse applications for rendering views. |
__Part I:__ [Integrating Velocity into AppFuse|AppFuseVelocity] - A HowTo for adding the Velocity Templating engine to AppFuse applications for rendering views. |
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* [7] Build your Velocity Templates |
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[{Java2HtmlPlugin |
{{{ |
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}] |
}}} |
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<include name="*.jar" /> |
<include name="*.jar" /> |
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<war |
<war |
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</war> |
</war> |
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!!Add the ViewServlet definition [#4] |
We know need to make webdoclet generate the appropriate entries for the VelocityViewServlet in web.xml. |
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Open metadata/web/servlets.xml and add the following: |
<pre> |
<servlet> |
<servlet-name>velocity-view</servlet-name> |
<servlet-class>org.apache.velocity.tools.view.servlet.VelocityViewServlet</servlet-class> |
<init-param> |
<param-name>org.apache.velocity.toolbox</param-name> |
<param-value>/WEB-INF/toolbox.xml</param-value> |
</init-param> |
<init-param> |
<param-name>org.apache.velocity.properties</param-name> |
<param-value>/WEB-INF/velocity.properties</param-value> |
</init-param> |
<load-on-startup>10</load-on-startup> |
</servlet> |
</pre> |
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Now we must setup the mappings: |
Open metadata/web/servlet-mappings.xml and add: |
<pre> |
<servlet-mapping> |
<servlet-name>velocity-view</servlet-name> |
<url-pattern>*.jst</url-pattern> |
</servlet-mapping> |
</pre> |
The pattern can be anything you like. Velocity usually uses .vm, but I used .jst for Java Server Templates. |
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!!Configure the Toolbox and VelocityEngine |
With me so far? Good, the last step is easy. We need to create two files in the web/WEB-INF directory to configure Velocity. |
More information about configuring Velocity can be found on their [site|http://jakarta.apache.org/velocity/user-guide.html]. |
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First is the velocity.properties: |
<pre> |
velocimacro.library = /WEB-INF/VM_global_library.vm |
velocimacro.permissions.allow.inline = true |
velocimacro.permissions.allow.inline.to.replace.global = false |
velocimacro.permissions.allow.inline.local.scope = false |
velocimacro.context.localscope = false |
</pre> |
Very simple, the only thing you may wish to change is velocimacro.library to match where you wish to put your global macros file. |
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Last is toolbox.xml (this configures the Struts tools): |
<pre> |
<?xml version="1.0"?> |
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<toolbox> |
<tool> |
<key>link</key> |
<scope>request</scope> |
<class>org.apache.velocity.tools.struts.StrutsLinkTool</class> |
</tool> |
<tool> |
<key>msg</key> |
<scope>request</scope> |
<class>org.apache.velocity.tools.struts.MessageTool</class> |
</tool> |
<tool> |
<key>errors</key> |
<scope>request</scope> |
<class>org.apache.velocity.tools.struts.ErrorsTool</class> |
</tool> |
<tool> |
<key>form</key> |
<scope>request</scope> |
<class>org.apache.velocity.tools.struts.FormTool</class> |
</tool> |
</toolbox> |
</pre> |
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!!Modify and ActionForward to point to Velocity [#6] |
Change your XDoclet @struts.action-forwards to be something like the following: |
{{{ |
* @struts.action-forward name="edit" |
path="/path/to/template/.[vm/jst/whatever]" |
}}} |
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The above tools will contain all the struts resources you'll need. They're embedded in the context as $key, for example $link, $errors, $form and so on. |
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!!Build your Velocity Templates [#7] |
See the [User Guide|http://jakarta.apache.org/velocity/user-guide.html] for Velocity for help with VTL. |
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''This tutorial was written by [Cameron Gray|http://cameronsweblog.co.uk/page/cameron] - thanks Cameron!'' |