這大概是太晚了,但因爲我已經看到了一些關於這個在網絡上的問題,我可能只是把我的解決方案在這裏,我已在Chrome和Firefox(所有最新的版本雖然)
測試
設置:一個更優雅的解決方案是使用過濾器,但我已經使用prerender事件(使用單個模板爲我的整個網站,因此我可以跟蹤何時加載每個頁面,並且我已指定prerender事件模板)
的Javascript部分:
window.onbeforeunload = function(){
//log out of the server too.
var xmlhttp;
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
var url = '/context/index.xhtml?onunload=true';
xmlhttp.open('GET', url, true);
xmlhttp.send();
}
window.onload = function(){
console.log('window name: '+window.name);
if(window.name != '#{controller.sessionId}'){
window.name = '#{controller.sessionId}';
var xmlhttp;
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
var url = '/context/index.xhtml?onload=true';
xmlhttp.open('GET', url, true);
xmlhttp.send();
}
}
//Called when user logs out.
function onLogout(){
console.log('logging out: '+window.name);
window.name = '';
console.log('logged out: '+window.name);
}
服務器端代碼:該視圖的預渲染事件
public void trackUserTabs() {
String onload = Controller.getParameter(ONLOAD_ID);
if (onload != null && onload.trim().equals("true")) {
openedTabs++;
System.err.println("onload: " + controller.getCurrentPrinciple() + "..........." + openedTabs);
}
String onunload = Controller.getParameter(ONUNLOAD_ID);
if (onunload != null && onunload.trim().equals("true")) {
openedTabs--;
System.err.println("onunload: " + controller.getCurrentPrinciple() + ".............." + openedTabs);
}
if (openedTabs <= 0 && controller.getCurrentProfile() != null) {
/**
* All tabs are closed, log out current user.
*/
controller.logoutCurrentProfile();
}
}
JavaScript代碼進行Ajax請求呈現之前
這種方法被稱爲是一個#1回答禮貌。