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John Rumpel
John Rumpel

Reputation: 4615

JSF/CDI: General way to update page content

what is the general way when requesting new pages with given parameters, i.e. calling CDI bean operations and bind the outcome to the page components?

I am using this 'pattern', but is this the right way?

    <ui:define name="content">
        <h:form id="dataForm">

            #{userForm.init(param.id, param.mode)}

            <!--  User edit Dialog -->
            <p:panel>
            ...
             </:panel>
         </h:form>
    </ui:define>

The problem is that when using the 'rendered' attribute, this depends on the bean (non-blocking) process outcome but the page might be rendered faster. Thus, I should be able to call an update process on the page UI components after processing.

Upvotes: 0

Views: 179

Answers (1)

Kuba
Kuba

Reputation: 2089

If you are using JSF 2.2 the way to go is:

<f:metadata>
    <f:viewAction action="#{backingBean.action}"/>
</f:metadata>

If you are < JSF2.2 but you happen to be using Seam you could use something like this as a pre-render view event, it does not have to be in a template, you can drop it in your ui:composition

XHTML

xmlns:s="http://jboss.org/seam/faces"

<f:metadata>
    <s:viewAction action="#{backingBean.action}" />
</f:metadata>

here is something to read Seam3, if not you can always use the classic way:

<f:metadata>
    <f:viewParam name="id" value="#{backingBean.entryId}"/>  
    <f:event type="preRenderView" listener="#{backingBean.loadEntry}"/>  
</f:metadata>

Upvotes: 1

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