Page Action needed for Injection?

[quilian]

Hi Folks!

i have the following scenario:

I have a page with a list of users called userList.xhtml and another page where i want to edit the previosly selected user called user.xhtml.

The users shown in userList come from the @DataModel annotated benutzerList in BenutzerManager, which is a SFSB.
The selected user shall be injected in BenutzerManager via the @DataModelSelection annotation.

it seems that the user is not injected and thus not outjected to user.xhtml.
So my user.xhtml shows a blank record.

Interestingly, if i add a page action into pages.xml which does nothing but call an empty void function on the BenutzerManager, the user is correctly propagated.

Im out of ideas now.

Thanks for your help.
Tobias Kilian



This is BenutzerManager.java:

@Stateful
@Scope(ScopeType.SESSION)
@Name("benutzerManager")
public class BenutzerManagerImpl implements Serializable, BenutzerManager {
 private static final long serialVersionUID = -6318701843857711619L;

 @DataModelSelection
 @Out(required = false)
 private BenutzerImpl selectedBenutzer;

 @Logger
 private Log log;

 @PersistenceContext(type = PersistenceContextType.EXTENDED)
 private EntityManager em;

 public void selectBenutzer()
 {
 }

 @DataModel
 private List<Benutzer> benutzerList;

 @Factory("benutzerList")
 public void findBenutzer() {
 benutzerList = em.createQuery("from BenutzerImpl benutzer")
 .getResultList();
 }
...
}

Here is my userList.xhtml:

<!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
 xmlns:s="http://jboss.com/products/seam/taglib"
 xmlns:ui="http://java.sun.com/jsf/facelets"
 xmlns:f="http://java.sun.com/jsf/core"
 xmlns:h="http://java.sun.com/jsf/html"
 template="layout/template.xhtml">

<ui:define name="body">
 <h1>userList</h1>
 <h:messages styleClass="message"/>
 <h:outputText value="No benutzer exists"
 rendered="#{empty benutzerList}"/>
 <h:dataTable var="benutzerIterator" value="#{benutzerList}" rendered="#{not empty benutzerList}">
 <h:column>
 <f:facet name="header">
 <h:outputText value="Id"/>
 </f:facet>
 <h:outputText value="#{benutzerIterator.id}"/>
 </h:column>
 <h:column>
 <f:facet name="header">
 <h:outputText value="Name"/>
 </f:facet>
 <s:link view="/user.xhtml" value="#{benutzerIterator.name}" propagation="join">
 </s:link>
 </h:column>
 </h:dataTable>

 <div class="actionButtons">
 <s:button id="done" value="Erstelle neuen Benutzer"
 view="/user.xhtml"/>
 </div>

</ui:define>
</ui:composition>

and here the user.xhtml:

<!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
 xmlns:s="http://jboss.com/products/seam/taglib"
 xmlns:ui="http://java.sun.com/jsf/facelets"
 xmlns:f="http://java.sun.com/jsf/core"
 xmlns:h="http://java.sun.com/jsf/html"
 xmlns:tr="http://myfaces.apache.org/trinidad"
 template="layout/template.xhtml">

<ui:define name="body">

 <h1>Benutzer</h1>
 <h:messages globalOnly="false" styleClass="message"/>

 <h:form id="benutzerForm">
 <s:validateAll>
 <div class="dialog">

 <div class="prop">
 <span class="name">Name</span>
 <span class="value">
 <s:decorate>
 <s:message/>
 <h:inputText id="name" required="true"
 value="#{selectedBenutzer.name}"/>
 </s:decorate>
 </span>
 </div>

 <div class="prop">
 <span class="name">Gruppe</span>
 <span class="value">
 <s:decorate>
 <s:message/>
 <h:selectOneMenu
 id="selectGruppenAuswahl"
 value="#{selectedBenutzer.gruppe}"
 required="true">
 <s:selectItems id="gruppenAuswahl" value="#{alleGruppen}" var="gruppeItem" label="#{gruppeItem.label}"/>
 <s:convertEntity />
 </h:selectOneMenu>
 </s:decorate>
 </span>
 </div>
 </div>
 </s:validateAll>

 <div class="actionButtons">
 <h:commandButton value="Save" id="saveButton" action="#{benutzerManager.save}"/>
 <h:commandButton value="Delete" id="deleteButton" action="#{benutzerManager.delete}"/>
 <s:button value="Cancel" id="cancelButton" view="/userList.xhtml" action="#{benutzerManager.cancel}"/>
 </div>
 </h:form>

</ui:define>

</ui:composition>

[pmuir]

You need to hit the benutzerManager with your s:link action rather than just navigating directly to the view. This is why the page action makes things work...

[quilian]

Hi pete!

thanks for the fast answer.
I did it like that now:

userList.xhtml

 <s:link action="#{benutzerManager.selectBenutzer()}" value="#{benutzerIterator.name}" propagation="join">
 </s:link>

pages.xml

 <page view-id="/userList.xhtml">
 <end-conversation/>
 <navigation from-action="#{benutzerManager.selectBenutzer()}">
 <redirect view-id="/user.xhtml"/>
 </navigation>
 </page>

that works, but i did not quite understand.
Will i always need an action which calls some dummy function on the benuterManager to invoke the Injection mechanism?

Greetings,
Tobias

[pmuir]

Well you need to call a method on the component for any bijection on it to occur.