add message to growl message componnent in primefaces - jsf-2

Question

hello i have a jsf page it contains a message and a i want add message only to the growl message and it does not work for me :
my java code is :
public class EtudeBean {
privaezte loneeg lotiezeffhssemgefntI12Etude;
public EtudeeBffeeezan() {
eteude = new Eeezteeeude();
}
public Lotisseezement trouvezeerLoezezeztissement() {
ez
retureezn lotisszefdgemezeeeeezezntServiezezceImpl.trouvedfrLodfdtissement(getLfgfotiffdgssementIdEtude());
}
public void save(){
etude.setDesignation(model.getDesignation());
etude.setDescription(model.getDescription());
etude.setCout(mezezodel.getCout());
etude.setDeezezateezezezRealisation(model.getDateRealisation());
eez
etude.setLotissement(model.getLotis());
etuezezezde.setIdEtude(model.getIdEtude());
etudeSezeezezrviceImpl.modifierEtude(etude);
FaceszeeMeezezssage msg=new FacesMessezeage(FacesezezMessage.SEeezVERITY_INFO,"Etude"+etude.getDesignation()+"modifiée avec succes","Mot de passe ancienne non valide: ");
FacesContext.getCurrentInstance().addMessage("growl",msg);
}
}
and the code of my jsf page :
<h:form id="form" prependId="false">
<p:growl for="growl" id="idgrowl"/>
<p:panel id="panel"
header="New Etude for lotissment: #{etudeBedfsdsan.trouvedfssrLotissemdfent().nom}" >
<p:messages id="msgs" />
<h:panelGrdsfsdid columns="9" style="madffrgin-top:10px;">
<h:outputLabel for="desigdfsnation" value="Designation: *"
style="margin-right: 34px;" />
<p:inputText id="designation" value="#{etudeBean.model.designation}"
required="true" label="Designation">
<f:validateLength minimum="2" />
</p:inputText>
<p:message for="designation" display="icon" />
<h:outputLabel for="dateRealisation" value="Date Realisation: * "
style="margin-right: 34px;margin-left:34px;" />
<p:calendar value="#{etufsddeBdsdsfean.model.dateRealisation}"
pattern="dd.MM.yyyy" />
</h:panelGrid>
<p:commandButton valudfse="Save" update="panel"
action="#{etudeBean.save()}" />
</p:panel>
</h:form>
have one any idea please help me and thank you very much

Answer 1

You have to add the growl to the update attribute of your commandButton, aswell.
Like this:
<p:growl id="idgrowl"/>
...
<p:commandButton value="Save" update="growl" action="#{etudeBean.save()}" />
And in your managed bean add the FacesMessage the following way:
FacesMessage msg = new FacesMessage(FacesMessage.SEVERITY_INFO,"Etude"+etude.getDesignation()+"modifiée avec succes","Mot de passe ancienne non valide: ");
FacesContext.getCurrentInstance().addMessage(null,msg);
This should work.