links from portlet content to another portal page

[hamptont]

I need to create inline hyper-links in the content (JSP fragment) of a portlet to another portal page. What is the best way to do this. I would like to do this from the JSP not from the portlet's Java code. I am not building a menu but simply hyper-linking some of the content that appears in the portlet.

Basically, what I need to know is how to generate the href for the anchor tag below

I need a hyper-link to <a href="">another page</a> in the portal.

I don't care if the solution is JBoss specific.

[belcar]

The reference guide has a topic about this: "13.9.3. Link to other pages."

// Get the ParentNode. Since we are inside a Window, the Parent is the Page
PortalNode thisNode = req.getPortalNode().getParent();
// Get the Node in the Portal hierarchy tree known as "../default"
PortalNode linkToNode = thisNode.resolve("../default");
// Create a RenderURL to the "../default" Page Node
PortalNodeURL pageURL = resp.createRenderURL(linkToNode);
// Output the Node's name and URL for users
Samples
149
html.append("Page: " + linkToNode.getName() + " -> ");
html.append("<a href=\"" + pageURL.toString() + "\">" + linkToNode.getName() + "</a>");

[hamptont]

I tried the code from the reference guide but I can't get it working correctly. The following is a test portlet jsp fragment that I'm working with.

The portal page structure is like this

pageA
 pageB
 pageC

The jsp fragment below is for a portlet that is on page B and is trying to resolve the pageURL to pageC which is a sub-page of pageB

<%@ taglib uri="http://java.sun.com/portlet_2_0" prefix="portlet" %>
<%@ page isELIgnored="false" %>
<%@ page import="org.jboss.portlet.JBossRenderRequest" %>
<%@ page import="org.jboss.portlet.JBossRenderResponse" %>
<%@ page import="org.jboss.portal.api.node.PortalNode" %>
<%@ page import="org.jboss.portal.api.node.PortalNodeURL" %>

<portlet:defineObjects/>

<%
 JBossRenderRequest req = new JBossRenderRequest(renderRequest);
 JBossRenderResponse resp = new JBossRenderResponse(renderResponse);

 PortalNode thisNode = null;
 PortalNode linkToNode = null;
 PortalNodeURL pageURL = null;

 thisNode = req.getPortalNode().getParent();
 if (thisNode != null) linkToNode = thisNode.resolve("pageC");
 if (linkToNode != null) pageURL = resp.createRenderURL(linkToNode);
%>


<p>
thisNode =
<% if (thisNode != null) { %>
 <%= thisNode.getName() %>
<% } else { %>
 null
<% } %>
</p>



<p>
linkToNode =
<% if (linkToNode != null) { %>
 <%= linkToNode.getName() %>
<% } else { %>
 null
<% } %>
</p>


<p>
pageURL =
<% if (pageURL != null) { %>
 <%= pageURL.toString() %>
<% } else { %>
 null
<% } %>
</p>

This example also produces a bizarre and very long error on the call to thisNode.resolve(). I am not sure that I'm getting the references to JBossRenderRequest & JBossRenderResponse correctly, but the example in the reference guide does not say what the correct way is to get these objects.

12:46:07,397 ERROR [PortalPermissionCollection] Permission check against the repository failed
org.hibernate.HibernateException: Unable to locate current JTA transaction
.........

I'm not sure what to the correct way to do this is but I'm pretty sure I did it wrong :)

[apemberton]

The message you're getting may be resolved by configuring your jboss-portlet.xml with a transaction attribute, otherwise your two portlets won't be able to generate URLs to eachother:


<portlet-name>YourPortlet</portlet-name>

<trans-attribute>Required</trans-attribute>



The the appropriate reference guide for info on the jboss-portlet.xml descriptor: http://docs.jboss.org/jbportal/v2.6.4/referenceGuide/html/jbossPortletDTD.html

[hamptont]

Thanks apemberton,

That was the trick.


This is a pretty onerous way to create a simple link to a page. Is there a simpler way ?


Thanks.