How to call java method on page load?

Question

How to call java method on page load?
Thanks

Answer 1

Hey Dan,
Well, if you want to execute a java method when page is load, you need to put the clientlistener in af:document. Let me to show you an example (I can't find my post :P),
JSPX page:
<f:view>
<af:document>
<f:verbatim>
<script>
    function loadPage(event) {
        alert('Hello World!');
</script>
</f:verbatim>
<af:clientListener method="loadPage" type="load"/>
</af:document>
</f:view>If you try this code you can see that when the page has been load, you recieve the alert "Hello World!".
Furthermore, this is the javascript AJAX function that let you to call a servlet:
function ajaxFunction () {
    var httpRequest;
    if (window.XMLHttpRequest) {
        httpRequest = new XMLHttpRequest();
    } else if (window.ActiveXObject) {
        httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
        httpRequest.overrideMimeType('text/xml');
    httpRequest.onreadystatechange = function() { alertContents(httpRequest); };
    httpRequest.open('GET', '/appname/servletname', false);
    httpRequest.send('');
function alertContents(httpRequest) {
    if (httpRequest.readyState == 4) {
        if (!httpRequest.status == 200) {
            alert('Request error. Http code: ' + httpRequest.status);
}Where 'appname' is your application name and 'servletname' is the name of the servlet that you want to call. Obviously, you can call any URL ;)
JVN