topic Re: Accessing HttpServletRequest from inside freemarker template in Alfresco Archive

Accessing HttpServletRequest from inside freemarker template

santoso_n — Sun, 23 Nov 2008 15:46:00 GMT

Hi all,I'm developing a custom dashlet and I need to access the current session Id, to do that I need to access HttpServletRequest.Anybody know how to access it from inside freemarker template?in JSF, I might try to access the session id using #{facesContext.externalContext.request.requestedSessionI

Re: Accessing HttpServletRequest from inside freemarker template

santoso_n — Sun, 23 Nov 2008 17:55:02 GMT

Currently I managed to find my way out, that is to pass my custom model to the template


<r:template template="/alfresco/templates/mydashlet.html.ftl" model="#{mycustom.templateModel}"/>
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Inside my custom model, I retrieve the session id value and store it in the map (e.g. sessionId), then in my ftl file I access the sessionId.

Anybody else know a better way to access the current session id in the template?

santoso

Re: Accessing HttpServletRequest from inside freemarker template

mrogers — Mon, 24 Nov 2008 10:37:21 GMT

Your solution has a lot going for it.

If you are following the MVC pattern (which is a good idea) then freemarker is the view tier and should not contain control logic. This becomes clear when you consider cases where when you want to have different representations of your model, lets say for example you want a version of your custom dashlet that renders xml rather than html or has other view tier features.

Re: Accessing HttpServletRequest from inside freemarker template

santoso_n — Mon, 24 Nov 2008 14:02:49 GMT

Actually there is no control logic in my freemarker template, maybe I'm not stating it clearly.
I just need to pass the session id to another application which in turn will call my webscript later.

Could you explain more on having a different presentation for my model that might fit my need?

Thanks

Re: Accessing HttpServletRequest from inside freemarker template

t_broyer — Wed, 26 Nov 2008 14:50:23 GMT

Hi all,

I'm developing a custom dashlet and I need to access the current session Id, to do that I need to access HttpServletRequest.

Anybody know how to access it from inside freemarker template?

How about creating a TemplateProcessorExtension? say:


${santoso.sessionId}
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Re: Accessing HttpServletRequest from inside freemarker template

santoso_n — Wed, 26 Nov 2008 16:32:10 GMT

Thanks, TemplateProcessorExtension seems to be a great idea.
However I couldn't find the documentation of it, could you pass me the link to the documentation?

Re: Accessing HttpServletRequest from inside freemarker template

t_broyer — Thu, 27 Nov 2008 14:23:32 GMT

Thanks, TemplateProcessorExtension seems to be a great idea.
However I couldn't find the documentation of it, could you pass me the link to the documentation?

I cannot find any doc on the wiki (I thought there was but am unable to find it back), so…

Here's the JavaDoc:
http://dev.alfresco.com/resource/docs/java/repository/org/alfresco/service/cmr/repository/TemplateProcessorExtension.html
http://dev.alfresco.com/resource/docs/java/repository/org/alfresco/repo/template/BaseTemplateProcessorExtension.html

Inherit the BaseTemplateProcessorExtension and configure a bean in a Spring context file. For examples or such configuration, search for one of the classes inheriting BaseTemplateProcessorExtension (DateCompareMethod or Session for example) in the WEB-INF/classes/alfresco/*-context.xml.
For an example of how to code such an extension, search for the same classes' source code in the Alfresco SDK or the public SVN.

Re: Accessing HttpServletRequest from inside freemarker template

santoso_n — Thu, 27 Nov 2008 17:05:10 GMT

Thanks a lot for the info, I will try it

Re: Accessing HttpServletRequest from inside freemarker template

veronika_zenz — Mon, 22 Jun 2009 14:36:03 GMT

I just had the same requirement of adding additional functionality to freemarker templates by adding a new root element.

Using this Forum and the template guide wiki page, section custom root objects, this worked out fine.

In short what I did to have a new root objects with custom functionality in freemarker, with some example code:
1) Create a java class that extends BaseTemplateProcessorExtension and defines the methods I want to access from freemarker templates


public class BibtexTemplate extends BaseTemplateProcessorExtension
{

   private BibtexService bibtexService;
   public String NodeToBibtexString(String nodeId)
   {
      StoreRef storeRef = new StoreRef("workspace://SpacesStore");
      NodeRef nodeRef = new NodeRef(storeRef, nodeId);   
      BibtexEntry entry = bibtexService.NodeToBibtex(nodeRef);
      return BibtexUtil.BibtexToString(entry);
   }
   

   
   public void setBibtexService(BibtexService bibtexService)
   {
      this.bibtexService = bibtexService;
   }
   
}
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2) Spring configuration (file "[whatever-you-like]-context.xml")


<bean id="bibtexTemplateExtension" parent="baseTemplateImplementation" class="com.matrixware.irss.bibtex.BibtexTemplate">
       <property name="extensionName">
           <value>bibtexTempl</value>
       </property>
      <property name="bibtexService">
         <ref bean ="BibtexService"/>
     </property>
   </bean>
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3) Use the new root object in freemarker template


<#list rows as row>
${bibtexTempl.NodeToBibtexString(row.nodeId)}
</#list>
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