Cannot create Seam component, scope is not active error
Hi,
I am trying to make a wizard with Seam, with one backing bean per screen, with a long running conversation. The first page is named choixLivraison, the second choixEnvironnement with respectively named backing beans. The second page got two radio buttons with a4j;support showing or hiding some parts of the page according to the radio selected. When I click the checkbox, I got this error :
WARN [org.jboss.seam.Component] Cannot create Seam component, scope is not active: choixEnvironnement(CONVERSATION)
I really don’t understand why my component is unreachable and the point of this message hereunder interesting parts of my code. I often have problems with conversation and a4j interactions.
Access to ChoixLivraison.xhtml:
<s:link value="Nouveau déploiement"
view="/ChoixLivraison.xhtml"
propagation="none" />
[…]
ChoixLivraison.xhtml (link to the second page):
<div class="actionButtons">
<s:button view="/ChoixEnvironnement.xhtml"
propagation="join"
value="Sélectionner la cible du déploiement">
<f:param name="from" value="ChoixLivraison" />
</s:button>
</div>
[…]
ChoixLivraison.page.xml:
<?xml version="1.0" encoding="UTF-8"?> <page xmlns="http://jboss.com/products/seam/pages" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jboss.com/products/seam/pages http://jboss.com/products/seam/pages-2.2.xsd"> <begin-conversation /> <param name="from" /> </page>
ChoixLivraisonBean.java;
@Stateful
@Name("choixLivraison")
@Scope(ScopeType.CONVERSATION)
public class ChoixLivraisonBean implements ChoixLivraison {
[…]
@Remove
public void destroy() {
}
@Begin(join=true)
public List<Livraison> getLivraisonList() {
if (FacesContext.getCurrentInstance().getRenderResponse()) {
livraisonList = (List<Livraison>) entityManager.createNamedQuery("Livraison.findAll").getResultList();
}
return livraisonList;
}
[…]
}ChoixEnvironnement.xhtml:
<h:form>
<h:selectOneRadio id="groupeEnvironnementChoosen" label="Déployer sur" required="true" value="#{choixEnvironnement.groupeOrEnvLogiqueChoice}">
<a4j:support event="onchange" reRender="environnementLists" />
<f:selectItem id="groupeEnvironnementChoice" itemLabel="un groupe d’environnement" itemValue="groupeEnvironnement" />
<f:selectItem id="envLogiqueChoice" itemLabel="un environnement logique" itemValue="envLogique" />
</h:selectOneRadio>
<a4j:outputPanel id="environnementLists" ajaxRendered="true">
[…]
</a4j:outputPanel>
</h:form>ChoixEnvironnement.page.xml:
<?xml version="1.0" encoding="UTF-8"?> <page xmlns="http://jboss.com/products/seam/pages" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jboss.com/products/seam/pages http://jboss.com/products/seam/pages-2.2.xsd"> <begin-conversation join="true" /> <param name="from" /> </page>
ChoixEnvironnementBean.java:
@Stateful
@Name("choixEnvironnement")
@Scope(ScopeType.CONVERSATION)
public class ChoixEnvironnementBean implements ChoixEnvironnement {
[…]
@Remove
public void destroy() {
}
@Begin(join=true)
public List<EnvLogique> getEnvLogiqueList() {
if (FacesContext.getCurrentInstance().getRenderResponse()) {
envLogiqueList = (List<EnvLogique>) entityManager.createNamedQuery("EnvLogique.findAll").getResultList();
}
return envLogiqueList;
}
[…]
}I will temporary try with only one backing bean, but it is not as clean as I want.
Thanks in advance for your help.