Spring MVC Portlets: external pagination with displaytag needs to go to the action phase - spring

Question

I'm using Spring MVC portlets I need to implement one display tag with external pagination. In order to do this, I've defined my table in the JSP like this:
<portlet:actionURL var="viewListURL">
<portlet:param name='action' value='${ServletContextKeys.MY_ACTION_METHOD}'/>
</portlet:actionURL>
<display:table name="${whateverList}"
requestURI="${viewListURL}"
class="displayTagTable"
export="true"
uid="item"
pagesize="10"
partialList="true"
sort="external"
defaultsort="1"
size="${ServletContextKeys.SC_LIST_SIZE}">
...
The problem is that, when I click any button to paginate, the displaytag redirects me to the render phase instead the action phase as I want to. What am I doing wrong? Any ideas..?
Thanks a lot
EDIT: I can see in the URL that the parameter p_p_url_type=0 (render phase). it makes no sense to me, as I'm calling an action url, but maybe would be enough just change this parameter to p_p_url_type=1. But, I'm just don't know how... Any ideas?
http://localhost:8080/wsdes/user/sifo3/home?p_p_id=SifoIIIweb_WAR_sifo3economicoweb_INSTANCE_s8jH&p_p_lifecycle=1&p_p_url_type=0&p_p_state=maximized&p_p_mode=view&_SifoIIIweb_WAR_sifo3economicoweb_INSTANCE_s8jH_action=consultaJustificantes&_SifoIIIweb_WAR_sifo3economicoweb_INSTANCE_s8jH_implicitModel=true&_SifoIIIweb_WAR_sifo3economicoweb_INSTANCE_s8jH_d-49489-p=2

Answer 1

Been there before. I solved the problem in a different way, but while looking in DisplayTag source code I found some interesting things. For example, in PortletHref you can find this in the addParameter method:
if (PARAM_TYPE.equals(name))
{
if (TYPE_RENDER.equals(value))
{
this.setAction(false);
}
else if (TYPE_ACTION.equals(value))
{
this.setAction(true);
}
And also:
private static final String PARAM_PREFIX = "portlet:";
public static final String PARAM_TYPE = PARAM_PREFIX + "type";
public static final String TYPE_ACTION = "action";
Apparently, if you need a parameter named portlet:type with value action to make DisplayTag generate an Action URL. I haven't tested myself, so let me know if it works.

Answer 2

I still don't know the reason, but I fixed this issue changing the display tag for Portlets (displaytag-portlet.jar), to the standard displaytag, and deleting from the displaytag.properties file the factory.requestHelper property:
factory.requestHelper=org.displaytag.portlet.PortletRequestHelperFactory
Using the normal displaytag library, instead of the portlet one, fixed my problems.