Reading return value of JSF action method in JS

Question

I've got a simple commandbutton which fires an action method in a backing bean. This method returns a string. In some cases null, in some cases an explicit navigation.

 <p:commandButton value="Button" action="#{obj.submit}" onstart="PF('busy').show();" oncomplete="PF('busy').hide()">

In case navigation is triggered, I want to show a popup. But how can I check if the method returns an empty string / null ?

in your return (submit) method you get the case that made it null — Yagami Light, Sep 27 '16 at 21:26

score 0 · Accepted Answer · answered Sep 27 '16 at 16:42

0

Try to use this

<p:commandButton value="Button" action="#{obj.submit}">

And in your method "submit" you have to make the assessment of the case

public String submit(){
your code
....
if (value!=null){
RequestContext.getCurrentInstance().execute("PF('busy').show();"); 
return value;
} else {
return value; 
}
}

answered Sep 27 '16 at 16:42

Christian

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Interesting how I knew of this possibility and ignored it somehow. Thanks! – Steven De Groote Sep 28 '16 at 08:29

Reading return value of JSF action method in JS

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