RequestMapping does not occurs

Question

I'm trying to communicate between two portlets by rendering the URL.

One portlet shows the table containing the list of available options. When one of the options is clicked, a javascript function renders the URL and in the second portlet should appear the detailed info about the clicked project.

However, it is not working: the URL is rendered correctly, with the proper id of the row in the URL but the method of the second portlet, set with @RenderMapping(params) is never called.

Thanks in advance First portlet view.jsp:

<%@page import="java.util.List"%>
<%@page import="pl.spot.vorange.model.Project"%>
<%@ taglib uri="http://java.sun.com/portlet_2_0" prefix="portlet" %>

<div id="projectListDiv"  style="width: 100%;"></div>

<script type="text/javascript">
var pids = new Array();
var pnames = new Array();
var projectId = "${p.id}";
<%
List<Project> all = (List<Project>) request.getAttribute("all");
if(all!=null && !all.isEmpty()) {
int i = 0;
for(Project project : all) {
    out.println("pids[" + i + "]='"+project.getId()+"';\n");
    out.println("pnames[" + i + "]='"+project.getName()+"';\n");
    i++;
}
} else {
    out.println("brak projektów w zasięgu requestu");
}
%>

function createProjectList() {
var tags = "<table width='100%'>";

for(var i=0; i<pids.length; i++) {
    tags += "<tr class='projectTr'>";
    tags += "<td class='orangeArray' onClick='firePortletEvent2(" + pids[i] +  
")'> </td>";

    if(pids[i]!=projectId) {
        tags += "<td class='orangeTableItem' onClick='firePortletEvent2(" +
 pids[i] + ")'>";
    } else {
        tags += "<td class='orangeTableItemSel'  
 onClick='firePortletEvent2(" + pids[i] + ")'>";
    }

    tags += pnames[i] + "</td></tr>";
}

tags += "</table>";
el = document.getElementById("projectListDiv");
if(el!=null) {
    el.innerHTML = tags;
}
}
function firePortletEvent2(projectId) {
var url ="<portlet:renderURL />";   
prefix = "&_offer2_WAR_vorange_";
url += prefix+"a=getproject";
url += prefix+"page=expiring";
url += prefix+"tab=expiringOffers";
url += prefix+"pid="+encodeURI(projectId);
location = url;
}

createProjectList();
</script>

Clicking on one of the projects renders the URL.

Second portlet controller:

@RenderMapping(params = "a=getproject")
public String getProject(RenderResponse response, RenderRequest request) {

    String pid = request.getParameter("pid");
    Project p = null;
    if (pid != null) {
        long id = Long.parseLong(pid);
        p = projectService.searchById(id);
        request.getPortletSession().setAttribute("project", p);
    }

    p = (Project) request.getPortletSession().getAttribute("project");
    request.setAttribute("p", p);

    return "view";
}

I don't know if it's working correctly because this method is never called.

I know the code is messy but I haven't written it. I just obtained it and I must fix it.

I wouldn't be surprised if this code will never work but I have just started developing on Liferay and don't know many things.