ad 1, I use the jQuery (which is bundled with Liferay), you can bundle it in your standalone application too. http://api.jquery.com/jQuery.post/
I've added an example, it is just an idea how to implement it, I haven't try to compile it or run
ad 2, Serving resources mechanism is for sending html snippets (just serveResource method is invoked), action phase is for changing the portlet state (processAction and doView/Edit/Help are invoked). For more info see the JSR-286 specification.
Portlet JSP Example:
Portlet Example:
-- tom
I've added an example, it is just an idea how to implement it, I haven't try to compile it or run
ad 2, Serving resources mechanism is for sending html snippets (just serveResource method is invoked), action phase is for changing the portlet state (processAction and doView/Edit/Help are invoked). For more info see the JSR-286 specification.
Portlet JSP Example:
<script type="text/javascript">
function <portlet:namespace />refreshCarMakes(){
// url to the resource myCars
var carsUrl = '<portlet:resourceURL id="myCars" />';
// send AJAX call using POST
jQuery.post(carsUrl, function(data) {
// create new content from the data
var buffer = "";
for(i = 0; i < data.cars.length; i++){
var car = data.cars[ i ];
buffer += "<option value="+car.id+">";
buffer += car.name + " wheels: " + car.wheels;
buffer += "</option>";
}
// replace content
jQuery("<portlet:namespace />selectedCarOption").html(buffer);
}, "json");
}
</script>
<input type="button" value="Load cars" onclick="<portlet:namespace />refreshCarMakes()">
<select name="selectedCar" id="<portlet:namespace />selectedCarOption"></select>
Portlet Example:
public class MyPortlet extends GenericPortlet {
...
@Override
public void serveResource(ResourceRequest request, ResourceResponse response) throws PortletException, IOException {
response.setContentType("application/json");
String resourceId = request.getResourceID();
if (resourceId.equals("myCars")) {
PrintWriter writer = response.getWriter();
writer.println("{");
writer.println(" 'cars': [");
writer.println(" {'id':1,'name':'myCar','wheels'=4},");
writer.println(" {'id':2,'name':'myCar','wheels'=3},");
writer.println(" {'id':3,'name':'myCar','wheels'=2},");
writer.println(" {'id':4,'name':'myCar','wheels'=1}");
writer.println(" ]");
writer.println("}");
}
}
...
}-- tom
