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How can I make an ajax request that updates a <h:dataTable> from javascript? I am currently loading the initial data using @Postconstruct but that is significantly delaying the initial page load.
I am thinking about using onload event of <body> HTML tag to fire the request and update the datatable.
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In theory the following should do it.
<h:body> <f:ajax event="load" listener="#{bean.onload}" /> </h:body> with
public void onload(AjaxBehaviourEvent event) { // ... } However, this is not supported for some reason. I've ever posted an issue report about that.
The following works, but it's in essence a hack.
<h:head> <title>JSF 2.0 onload hack</title> <script> window.onload = function() { document.getElementById('hidden:link').onclick(); } </script> </h:head> <h:body> <h:form id="hidden" style="display:none"> <h:commandLink id="link"> <f:ajax event="click" listener="#{bean.onload}" /> </h:commandLink> </h:form> </h:body> If you happen to use PrimeFaces, then you can use its <p:remoteCommand> with autoRun set to true.
<h:body> <h:form> <p:remoteCommand name="onload" action="#{bean.onload}" autoRun="true" /> </h:form> </h:body> Or if you're using OmniFaces, then you can use its <o:commandScript>
<h:body> <h:form> <o:commandScript name="onload" action="#{bean.onload}" /> <h:outputScript target="body">onload()</h:outputScript> </h:form> </h:body> The <h:outputScript target="body"> renders the <script> in the end of the <body>. The upcoming OmniFaces 2.2 will remove this need by new autorun attribute.
<h:body> <h:form> <o:commandScript name="onload" action="#{bean.onload}" autorun="true" /> </h:form> </h:body> in jsf2.0 you can use the f:ajax tag in almost any other jsf tag e.g
<h:selectOneRadio id="myComponent" value="#{someBean.inputMethod}"> <f:selectItem itemValue="#{someBean.A}" itemLabel="A" /> <f:selectItem itemValue="#{someBean.B}" itemLabel="B" /> <f:ajax event="click" action=#{someBean.someMethod} /> </h:selectOneRadio> In this example the someMethod is excuted in the javasript onClick event for the "myComponent" selectOneRadio
Not sure if this is what you are after ....
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