FacesMessage added during render phase not displayed

[sw_bpel]

hello,

actually i have some problems with FacesMessages. I have a stateful session bean in the conversation scope:

@Scope(ScopeType.CONVERSATION)

This Bean has a factory method which loads a list of entities from database on initialization. This works fine if the list isn't null or empty. But when it's empty i want to display a message on the page where normally (positive case) the table with entity-list infos is displayed. Therefor i have the

<h:messages />

tag placed on the top of the page. In the factory method i add the FacesMessage like this:

FacesMessages.instance().addFromResourceBundle( Severity.INFO, "not.found", "entity" );

but the message is never displayed.
Is there any way / workaround to display the Messages?

Greetz, Stefan

[niox.nikospara.yahoo.com]

Hi,

Are the messages generated in an AJAX request? If so make sure the <h:messages /> is re-rendered.

[sw_bpel]

No, i don't use a AJAX request here. It's only a normal XHTML page without AJAX components.
I have two cases here. The first case is, that on page load the table with entities is displayed. The second case is, that there are no entities, then i want to display a facesMessage, but it isn't displayed. So there is no redirect or anything else.

page code:

<h:messages />
<a:outputPanel id="tablePanel" rendered="#{entityList != null and entityList.rowCount > 0}">
<h:dataTable id="entityTable" value="#{entityList}" var="en" rendered="#{entityList.rowCount > 0}">
...
</h:dataTable>
</a:outputPanel>

the

<a:outputPanel />

Tag i only use here to check if the table should be displayed or not.

[niox.nikospara.yahoo.com]

Have you tried to add the message according to the standard way:

FacesContext.getCurrentInstance().addMessage(
  null,
  new FacesMessage(FacesMessage.SEVERITY_WARN,"xxxx","yyyy")
);

Does it display messages added this way?

[lucas84]

I guess that factory method is invoked during render response, after messages part has been rendered.

<h:messages/>
...
...
<rich:dataTable value=#{list}>

...
</rich>

Does yours xhtml looks like above?? When page is rendered, it first renders h:messages, at this point no messages were created so there is nothing to renderer. Later it renders rich:dataTable and starts resolving list, which finally calls your factory methods (which generates messages). But it's too late for adding messages as h:messages has been already rendered. You should look for log in console, something like this: message was queued but not displayed. If this is an issue, the solution is to call factory method before render response, ie. in page.xml using action execute.

[sw_bpel]

Hey Nicos,

Have tried this also, but doesn't work.
I guess the suggested solution of Lukasz could probably help me. I'm going to try this and post the results. Thanks for your help!

Greetz Stefan

[sw_bpel]

Hello Lukasz,

yes that's it! I added this to my page.xml

<page view-id="/entity/list.xhtml">
  <action execute="#{EntityListManager.initEntityList()}" />
  ...
</page>

and it works now. But is there no other way to publish FacesMessages during the render phase? Or can i turn the rendering of h:messages and rich:dataTable/h:dataTable? Or is there any programmatic solution for this? Can i call/do the rendering of m:messages myself e.g. in my factory method?

Anyway, so far thank you very much!

[vtyro]

    public static void test() {
        FacesMessages.instance().addFromResourceBundle(WARN, "message.test");
        refreshMessages();
    }

    private static void refreshMessages() {
        // if render response phase try add messages to faces context
        if(FacesContext.getCurrentInstance().getRenderResponse()) {
            try {
                // localization messages
                FacesMessages.instance().afterPhase();
                // Seam messages to standart JSF messages
                FacesMessages.instance().beforeRenderResponse();
            } catch (Throwable t) {
                log.error(t, t);
            }
        }
    }

Try this code...