A phase listener is registered in faces-config.xml like this:
<lifecycle>
<phase-listener>com.whatever.icefaces.lifecycle.LiferaySessionKeepAlive</phase-listener>
</lifecycle>
My class looks like this:
public class LiferaySessionKeepAlive implements PhaseListener {
/**
* Script to keep the liferay session alive while only ajax requests are being performed
* closes the warning box if necessary.
*/
private final static String KEEP_ALIVE_SCRIPT = new StringBuffer().append(" try { if ('noWarning' == sessionRenewAtWarning()) { sessionRenew(); } } catch(e) {} ").toString();
@Override
public void afterPhase(PhaseEvent event) {
JavascriptContext.addJavascriptCall(FacesContext.getCurrentInstance(), KEEP_ALIVE_SCRIPT);
}
@Override
public void beforePhase(PhaseEvent event) {
}
@Override
public PhaseId getPhaseId() {
return PhaseId.RENDER_RESPONSE;
}
}
the KEEP_ALIVE_SCRIPT calls a function that I have defined in an override in ext/ext-web/docroot/html/common/themes/session_timeout.jsp, but you can put it elsewhere :
// Renews the session only if the session expiring warning is shown.
// By finding the warning box, and clicking it's Extend button
// Returns true if an Extend was issued, false otherwise.
function sessionRenewAtWarning(){
var jqryWarn = new jQuery;
var warnElm = jqryWarn.find('.popup-alert-notice');
if (warnElm.length > 0) {
// Match content of warning with session expiration warning language
if (Liferay.Language.get('warning-your-session-will-expire').indexOf(warnElm[0].firstChild.nodeValue) == 0) {
// click the extend button
warnElm.find('.popup-alert-close').click();
return true;
}
}
return "noWarning";
}
// Renews the session and resets the client timer
function sessionRenew() {
if (Liferay.Session._stateCheck) {
window.clearTimeout(Liferay.Session._stateCheck);
Liferay.Session._stateCheck = null;
}
Liferay.Session.init(
{
autoExtend: <%= PropsValues.SESSION_TIMEOUT_AUTO_EXTEND %>,
timeout: <%= sessionTimeout %>,
timeoutWarning: <%= sessionTimeoutWarning %>,
redirectOnExpiration: <%= PropsValues.SESSION_TIMEOUT_REDIRECT_ON_EXPIRE %>
}
);
jQuery.ajax(
{
url: Liferay.Session._sessionUrls.extend
}
);
}
There it is... Hope it helps...
