Executing JPublish Actions from DWR? What else can be simpler? :)

Sun, 28 Oct 2007 00:27:59 GMT

I was always envying the ability of Webwork to execute Actions via DWR and it was clear that any JPublish user will need something similar. However, I wanted a simpler implementation.

As promised, now you have it:) If you'll update your JPublish framework from SVN, including the DWR module, you'll see what I am talking about . Yup, you can execute any JPublish action (BSH, JS, JRUBY, GROOVY or Java compiled code) making remote calls via DWR. In the SVN there is also a demo showing you how to do this: SimpleDWR

In the small explanation below I presume you're already familiar with how JPublish and DWR work together.

This is what you need to remotely execute a JPublish Action:
- first modify the dwr.xml file and define the Action you want to publish through the DWR.

   <init>
       <creator id="jpublish" class="ca.flop.jpublish.dwr.JPublishCreator"/>
   </init>
   ...
   <create creator="jpublish" javascript="InfoAction" scope="application">
        <param name="class" value="ca.flop.jpublish.dwr.DWRJPublishActionManager"/>
        <param name="actionName" value="InfoAction.bsh"/>
   </create>

- then define the InfoAction.bsh. Here is the code from our SVN example:

   String infoMsg = "Hi, this is JPublish 4";
   context.put("infoMsg", infoMsg);
   context.put("serverDate", new Date());
   print( infoMsg);

- now let's call the InfoAction in an AJAXified HTML page and display the infoMsg and the serverDate values returned by the InfoAction script, a server side BSH script executed by JPublish. Would that be hard? What do you think? Here is the code:

   ..
   <script type='text/javascript' src='$request.ContextPath/dwr/interface/InfoAction.js'/>
   ...
   Below is a simple demonstration of the ability to invoke JPublish Actions via DWR:<br/>
   <input type="button" value="Info" onclick='InfoAction.execute( params, function(response) {
        dwr.util.setValue("serverDate", response.serverDate);
        dwr.util.setValue("info", response.infoMsg);
      });'/><br/>

   Messages received from server:<br/>
   <div class="dateField" id="serverDate">-server date-</div>
   <div class="salute" id="info">JPublish Salute...</div>

Guess what? Uhhh..... that's all :)

Have fun!
-florin

Spikes Of Nothingness - simple tag

Executing JPublish Actions from DWR? What else can be simpler? :)