fileUpload Exception Handling

[linen]

Hi I'd like to handle an "exception" or rather validate the file that the user is attempting to upload. If the file already exists on the server, I'd like to display a message to the client informing them of this. I am doing the check in the upload Listener method of my ManagedBean. If I set the value of a property in the bean say "String errorMessage" in the listener method, how can I display this back on the form? I've also tried to instantiate a FacesMessage object and add the message to the FacesContext but it doesn't appear. Is that the correct strategy? Any help is appreciated thanks.

[robert.m]

Have a look at the showcase: http://www.primefaces.org/showcase-labs ... Simple.jsf
There you can see that this is exactly the way to do it. But make sure you update your message-component after the upload is completed. Otherwise the message is never read from the facescontext

You can exchange the growl component with <p:messages globalOnly="true"> for example. Then all FacesMessages with no component-binding will be displayed.