First i did build a JSR 286 compliant
ValidationCacheSamplePortlet
portlet like this.
public class ValidationCacheSamplePortlet extends GenericPortlet{
protected void doView(RenderRequest request, RenderResponse response)
throws PortletException, IOException {
System.out.println("Entering ValidationCacheSamplePortlet.doView()");
response.setContentType("text/html");
getPortletContext().getRequestDispatcher("/validation.jsp").include(request, response);
System.out.println("Exiting ValidationCacheSamplePortlet.doView()");
}
public void serveResource(ResourceRequest request, ResourceResponse response)
throws PortletException, IOException {
System.out.println("Entering ValidationCacheSamplePortlet.serveResource()");
response.setContentType("text/html");
response.getWriter().println("Hello from ValidationCacheSamplePortlet.serveResource");
System.out.println("Exiting ValidationCacheSamplePortlet.serveResource()");
}
}
The
ValidationCacheSamplePortlet
is very simple in the doView()
method it is passing control to validate.jsp for generating response markup and in the serveResource()
method is returning Hello from ValidationCacheSamplePortlet.serveResource
String.This is how the validation.jsp looks like, it has a button Resource button, when you click on that button it is making a
HTTP GET
call to <portlet:resourceURL/>
and displaying the response using alert.
<%@page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1" session="false"%>
<%@taglib uri="http://java.sun.com/portlet_2_0" prefix="portlet"%>
<portlet:defineObjects />
<script type="text/javascript">
function createXMLHttpRequestObject() {
var xmlHttp;
try {
xmlHttp = new XMLHttpRequest();
} catch (e) {
try {
xmlHttp = new ActiveXObject("Microsoft.XMLHttp");
} catch (e) {
}
}
if (!xmlHttp)
alert("Error creating the XMLHttpRequest object.");
else
return xmlHttp;
}
var xmlHttp = createXMLHttpRequestObject();
function makeResourceCall(){
if (xmlHttp){
try{
xmlHttp.open("GET", "<portlet:resourceURL/>", true);
xmlHttp.onreadystatechange = handleRequestStateChange;
xmlHttp.send(null);
}catch (e){
alert("Can't connect to server:\n" + e.toString());
}
}
}
function handleRequestStateChange(){
if (xmlHttp.readyState == 4){
if (xmlHttp.status == 200){
alert(xmlHttp.responseText);
}
}
}
</script>
<input type="button" onclick="JavaScript:makeResourceCall()" value="Resource Call" />
<div id="resourceResponse"></div>
4 comments:
hi,
I tried what u have said here.but i get an error saying "This portlet is temporarily disabled" .
what can be the possible issue here.
Thanks
HI vogue,
Which Portal Server you are using?
if u are using any portal server,u need to add this portlet to one page.And You have to Active that Page.
Thanks for info....
SEO Company in Bangalore
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