Is there a way to call a method upon leaving a page with JSF or PrimeFaces?

jsf primefaces managed-bean window.onunload

14,596

Solution 1

Not when using native JSF or PrimeFaces. Your best bet would be to hook on session expiration instead.

import javax.inject.Named;
import javax.enterprise.context.SessionScoped;

@Named
@SessionScoped
public class Bean implements Serializable {

    @PreDestroy
    public void destroy() {
        // Your code here.
    }
}

If you happen to use the JSF utility library OmniFaces, then you can use its @ViewScoped. This will call the @PreDestroy when leaving the page referencing the view scoped bean.

import javax.inject.Named;
import org.omnifaces.cdi.ViewScoped;

@Named
@ViewScoped
public class Bean implements Serializable {

    @PreDestroy
    public void destroy() {
        // Your code here.
    }
}

Under the covers, it works by triggering a navigator.sendBeacon() during the window beforeunload event with a fallback to synchronous XHR (which is deprecated in modern browsers supporting navigator.sendBeacon()).

Solution 2

Your problem Solution :- it work with java script

    <head>
<title>onunload test</title>
<script type="text/javascript">
window.onunload = unloadPage;

function unloadPage()
{
 alert("unload event detected!");
}
</script>
</head>

Also Some link for more details:- Link

14,596

Author by

Landister

Updated on July 19, 2022

Comments

Landister almost 2 years

Is there a way to call a method upon leaving a page with JSF?
BalusC about 12 years

Have you ever tried it yourself? It won't work. At least, not in normal webbrowsers.
prageeth about 12 years

I dont know what are the "normal webbrowsers". But I have tried this before I put it here. Now again I tried it in Chrome, FF and IE. Have YOU tried this before commenting?
BalusC about 12 years

Then you had the luck to be inside a race condition everytime where ajax request has won from the browser close event. This is however not guaranteed to be successful everytime. For sure not in production where the server usually runs at a physically different machine and the network latency is thus higher.
BalusC about 12 years

The OP want to call a JSF backing bean method, not to show a simple alert.
damian over 11 years

maybe you can programmatically click a hidden commandButton in the unload event to call a method in backing bean
Web Devie over 10 years

@BalusC I don't see OP has written he want to call baking bean method, he want simply to call method, or can't write...