Add global message when field validation fails

Question

Usually the PrimeFaces tag for messages shows the global as well as the field specific messages. What I want to do is to just show the global messages (globalOnly=\"tr

Answer 1

I use a phase listener to do so. This is roughly my implementation (using OmniFaces):

public class ValidationFailedListener implements PhaseListener {

  @Override
  public void afterPhase(PhaseEvent event) {
    // NOOP
  }

  @Override
  public void beforePhase(PhaseEvent event) {
    if (Faces.isValidationFailed()) {
      Messages.addGlobalError("Your validation failed message");
    }
  }

  @Override
  public PhaseId getPhaseId() {
    return PhaseId.RENDER_RESPONSE;
  }

}

You should register it in your faces-config.xml:

  your.ValidationFailedListener

My actual implementation uses a message bundle to display a localized message.

---

If you cannot use OmniFaces, here is the relevant code using vanilla JSF:

if (FacesContext.getCurrentInstance().isValidationFailed()) {
  FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_ERROR,
                                          "Your validation failed message",
                                          null);
  FacesContext.getCurrentInstance().addMessage(null, message);
}