Hi!

I would like to know is there a way to stop fileUploadListener (fileUpload component) and diplay error message?

E.g.
I would like to upload file only if file with sam name doesn't egsist on server. It would be nice if the validation would be on client side. So I tried to do validation inside of fileUploadListener, but the message (<h:messages />) is not shown, although the upload is stopped, and message is added.

Here is the code

public void processUpload(UploadEvent event) {

 UploadItem item = event.getUploadItem();
 java.io.File f = item.getFile();

 fileList = getFiles();
 for (File file : fileList) {
 if(item.getFileName().equals(file.getName())){
 FacesContext ctx = FacesContext.getCurrentInstance();
 //Show message
 ctx.addMessage(null, new FacesMessage(FacesMessage.SEVERITY_ERROR,
 "error", "error"));


 ctx.renderResponse();
 return;
 }
 }
 //If file doesn't egsists...
 ...