facesmessages in java code. Problem with the documentation

[aldian00]

Hi everybody

I have a problem with this paragraph from the documentation : Faces messages

There is not much explanations on how it works. Furthermore, there is obviously a problem, since there is no return statement for the sayIt() method, and the return type of the method facesMessages.addFromResourceBundle(Hello); is void.

All in all I still don't understand how to make call on the resource bundle from the java code.

Any explanation would be welcome.

[monkeyden]

You're correct, the method should be returning some string, or null.  Presumably, that return value is a string representing the JSF navigation rule, represented by success in the example below:

<page view-id="/some/view-id.xhtml">
    <navigation>
        <rule if-outcome="success">
         <redirect view-id="/some/other/view-id.xhtml"/>
     </rule>
    </navigation>         
</page>

'Hello' in that case is a resource bundle key.  All you need to do is add the message to your resource bundle, for example:

messages.hello=Hello

and have this in the code:

@Name("hello")

@Stateless

public class HelloBean implements Hello {

    @In FacesMessages facesMessages;  //inject component

    

    public String sayIt() {
        facesMessages.addFromResourceBundle("messages.hello"); //add msg to component
        return "success"; //or null, to return to the same view id
    }

}

then, in your view, you have an commandButton/link which has an action of hello.sayIt

<h:commandButton id="sayItButton" value="Say It" action="#{hello.sayIt}" />

Once you have that working, explore the FacesMessages api for different ways to add the message, including Severity, message parameters, etc.

http://docs.jboss.com/seam/2.1.2/api/org/jboss/seam/faces/FacesMessages.html

Note that many FacesMessages methods have been deprecated in favor of StatusMessages, which are functionally similar.