Re: AjaxTag 1.3 support?

Jeromy Evans Fri, 01 Feb 2008 16:36:26 -0800

My 2c:

I think this is a bad solution and shouldn't be encouraged. It'smarginally better than writing a custom servlet.

Struts2 ResultTypes [1] are designed specifically for controlling thetype and content of results from actions to separate the view from themodel, even if the "view" is XML data. Accessing the response andwriting to it directly isn't necessary except in the rarest of cases.

For Ajax/JS libraries that use JSON, the JSON Plugin (JSON ResultType)[2] will serialize your action into JSON automaticallyThe XSL ResultType will serialize your action into XML if you provide astylesheet [3]The REST plugin includes code to serialize your action into XML usingXstream. [4]

My point is, your action can setup a model (eg. a javabean matching themodel expected by AjaxTag), and the ResultType can serialize it to theoutput stream. In this case I'd create a custom result type usingXStream, but you could also use a XML template in a Tile, or have aResultType that accesses the instance created by AjaxXMLBuilder.


[1] http://struts.apache.org/2.0.11/docs/result-types.html
[2] http://cwiki.apache.org/S2PLUGINS/json-plugin.html
[3] http://struts.apache.org/2.0.11/docs/xsl-result.html
[4] http://xstream.codehaus.org/
[5] http://struts.apache.org/2.0.11/docs/result-configuration.html

regards
Jeromy Evans

Hodgins, Grant wrote:

I was able to get the AjaxTags stuff working (with Tiles2 although I don't 
think that matters at all).

As Dave said, your action should return null since you want the action to 
return XML in the response.

Instead, in addition to returning a null result, I simply wrote the xml to the response:AjaxXmlBuilder xml = new AjaxXmlBuilder();


... build your xml response ...

response.setContentType("text/xml; charset=iso-8859-1");
response.setHeader("Cache-Control", "no-store, max-age=0, no-cache, 
must-revalidate");
response.addHeader("Cache-Control", "post-check=0, pre-check=0");
response.setHeader("Pragma", "no-cache");

PrintWriter pw = response.getWriter();

pw.write(xml.toString());
pw.close();

Hope this helps.Grant

________________________________

From: Griffith, Michael * [mailto:[EMAIL PROTECTED]
Sent: Fri 2/1/2008 3:48 PM
To: Struts Users Mailing List
Subject: RE: AjaxTag 1.3 support?

Dave,

Thanks for the reply. I guess I should have said freemarker instead of
sitemesh...?  At any rate, when the docs don't match the release, it's a
bad thing.

I shouldn't need to do any of this should I? Can you point me at a
simple, minimalist example of the <s:autocompleter> tag?

mg

-----Original Message-----
From: Dave Newton [mailto:[EMAIL PROTECTED]
Sent: Friday, February 01, 2008 5:42 PM
To: Struts Users Mailing List
Subject: Re: AjaxTag 1.3 support?

--- "Griffith, Michael *" <[EMAIL PROTECTED]> wrote:

public class QuestionAction extends BaseAction implements
ModelDriven<Question>, Preparable, ServletRequestAware,
ServletResponseAware {
      public String getSearchTerm() throws Exception {
              System.out.println("**** Question Search Term:" + qt);
              List<Question> results=

questionService.getQuestions(qt);

              AjaxXmlBuilder builder= new AjaxXmlBuilder();
              builder.addItems(results, "questionType", "text");

response.setContentType("text/xml");

               response.setHeader("Cache-Control", "no-cache");
               ServletOutputStream out = response.getOutputStream();
               out.print(builder.toString());
               out.close();

return SUCCESS;

      }

My struts mapping:

      <package name="question" extends="base-pkg"
namespace="/question">
              <action name="get-term" method="getSearchTerm"
class="...QuestionAction">
                      <result name="success"
type="tiles">question.panel</result>
              </action>
      </package>


If you're writing directly to the stream I doubt you'd even want to
return
anything other than a null from the action, no? What is the
"question.panel"
tile?

The struts 2 Ajax documentation seems manic and dated. It seems the S2
Ajax implementation is tied closely to sitemesh, which I am not using.


SiteMesh? The Ajax implementation isn't tied to SiteMesh at all.

Dated? Much of the S2 Ajax documentation is for S2.1, which isn't even
released yet. If anything, it's pre-dated.

Dave



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Re: AjaxTag 1.3 support?

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