Getting response form custom @proceesAction in WebSphere Portal Portlet

Question

i am developing a Portlet in WebSphere Portal 8 and i am having problems to get the response from a custom @processAction method, the method is called and executed, but in the jsp i cant get the data returned...

I have a jsp file wich has:

-definition of portlet actionURL...

<portlet:defineObjects/>
<portlet:actionURL var="cargarListadoConcursosURL">
       <portlet:param name="<%=ActionRequest.ACTION_NAME%>" value="cargarListadoConcursos" />
    </portlet:actionURL>

-javascript method with ajax post method:

<script type="text/javascript">
    $(document).ready(function() {
        cargarListadoConcursos();
    });

    function cargarListadoConcursos() {
        $.ajax({
            url : '<%=cargarListadoConcursosURL%>',
            type : 'POST',
            dataType : 'json',
            success : function(data) {
                alert(data);
                //do something!!!
            }
        });
    }

and my portlet class looks like:

public class ListadoConcursosPortlet extends GenericPortlet
{
   //more methods...

    @ProcessAction(name="cargarListadoConcursos")
    public void cargarListadoConcursos(ActionRequest request, ActionResponse response) throws PortletException, IOException {
        HttpServletResponse resp = PortletUtils.getHttpServletResponse(response);
        resp.setContentType("application/json");
        resp.setCharacterEncoding("UTF-8");
        PrintWriter writer = resp.getWriter();
        writer.append(gson.toJson(new ArrayList<Concurso>()));
        writer.flush();
        resp.flushBuffer();
        System.out.println("Paso por cargarListadoConcursos");
    }
}

I think that the portlet.xml its fine beacuase the jsp call the portlet cotroller (the syso appears at console)...

Well in conclution, the problems is that i cant get the Json object in my javascript called, and the alert(data) is never executed...

Thanks in advance for any tip!!!

Answer 1

The issue is that the page is refreshed when you it the actionURL. You need to use a Resource Serving Portlet, the serveResource method and an resourceURL which doesn't refresh the page when called.

Answer 2

使用serveResource（）....并从jsp使用resourceURL