AJAX for JSF

Simple JSF AJAX requests can be achieved within JSF (JSP) as follows:

1. JavaScript - make the request to get data from the AJAX Servlet
2. Ajax Servlet - process the request and send the XML/JSON/plain text response
3. JavaScript - process the response and use the data on the page

For example:

    <script type="text/javascript" language="Javascript">
        // get the ajax request object (from Ajax.js)
        var http = getAjaxRequestObject();
        // connect to the server (URL to the AjaxServlet)
        http.open('GET', '/myjsfapp/faces/AjaxSevlet?param1="foo"&param2="bar"');
        // assign a handler for the response
        http.onreadystatechange = processResponse;
        // send the request to the server
        http.send(null);
     
        function processResponse() {
        // if the response has been received from the server
          if (http.readyState == 4) {     
            // read the response from the server
        var response = http.responseText;
        // process the response
        // e.g. parse the XML, JSON etc.
                ...
            }
        }
    </script>

Ajax.js
AjaxServlet.java
XmlUtils.java