Java Class not invoking in web-scripts

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mazhar_shaukat

Hi,

I'm new to web-scripts. I'm trying to successfully run an example.
My Java Class is as follow;

package org.alfresco.module.demoscripts;

import java.io.IOException;

import org.json.JSONException;
import org.json.JSONObject;
import org.springframework.extensions.webscripts.AbstractWebScript;
import org.springframework.extensions.webscripts.WebScriptException;
import org.springframework.extensions.webscripts.WebScriptRequest;
import org.springframework.extensions.webscripts.WebScriptResponse;

public class SimpleWebScript extends AbstractWebScript {

   @Override
   public void execute(WebScriptRequest req, WebScriptResponse res)
         throws IOException {
      try
       {
          // build a json object
          JSONObject obj = new JSONObject();
          
          // put some data on it
          obj.put("field1", "data1");
          
          // build a JSON string and send it back
          String jsonString = obj.toString();
          res.getWriter().write(jsonString);
       }
       catch(JSONException e)
       {
          throw new RuntimeException("Unable to serialize JSON");
       }

   }

}
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Descriptor simple.get.desc.xml

<webscript>
  <shortname>The World's Simplest Webscript</shortname>
  <description>Hands back a little bit of JSON</description>
  <url>/demo/simple</url>
  <authentication>none</authentication>
  <format default="">argument</format>
  <family>Alfresco Java-Backed WebScripts Demo</family>
</webscript>‍‍‍‍‍‍‍‍

When I access it like this;
http://localhost:8080/alfresco/service/demo/simple
I get the following error:

org.springframework.extensions.webscripts.WebScriptException: 04110003 Web Script format '' is not registered‍

when I try following
http://localhost:8080/alfresco/service/demo/simple?format=json

I get this error:

org.springframework.extensions.webscripts.WebScriptException: 04110002 Cannot locate template processor for template org/alfresco/demo/simple.get.json‍

please help

jpotts

I see your descriptor and I see your controller, but I do not see a view. Have you created a view corresponding to the format you want the web script to return? For example, if you are trying to return JSON, you need a FreeMarker file called simple.get.json.ftl.

Also, why did you set the default format in your descriptor to an empty string? I think you may want that to be "json".

Finally, in your controller, it looks like you are building JSON. A more flexible way to create your web script is to have your controller deal with data only and not worry about your response format. Then you can have multiple views implemented in FreeMarker, one of which can return JSON.

If you follow this approach, your controller would simply put data in the model, like this:

Map<String, Object> model = new HashMap<String, Object>();
model.put("field1", "data1");
return model;‍‍‍

Your view (simple.get.json.ftl) might look like this:

<#escape x as jsonUtils.encodeJSONString(x)>
{
   "field1": "${field1}",
}
</#escape>‍‍‍‍‍

Hope that helps,

Jeff