Outjection ignored - very basic example not running

[nschweig.nicole.schweighardt.t-online.de]

Hello,

I am new to Seam and tried to run a very simple example but it does not work. After searching in google and in forums too many hours I hope anybody here can help me.

I use JBoss AS 4.2.2GA, Seam 2.0.2. I work with Eclipse with JBoss Tools.
I created a New Seam Webproject, an example project from Jboss Tools. That works fine and the example is running.
Then I only wanted to test outjecting an variable from a session bean. But that does not work. I tried 3 versions:

1. Version

This is my basicBean

import javax.ejb.Remove;
import javax.ejb.Stateful;

import org.jboss.seam.annotations.Destroy;
import org.jboss.seam.annotations.In;
import org.jboss.seam.annotations.Logger;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Out;
import org.jboss.seam.faces.FacesMessages;
import org.jboss.seam.log.Log;

@Stateful
@Name("basicBean")
public class BasicBean implements BasicBeanLocal {
     
    @Logger private Log log;
     
    @In FacesMessages facesMessages;
    
    public void basicBean()
    {
        //implement your business logic here
        log.info("basicBean.basicBean() action called");
        facesMessages.add("basicBean");
    }
    
        @Out
     public String foo = "That is a test";
     
     @Remove @Destroy
     public void destroy() {}
}

and this the xhtml-page:

...
    <h:messages globalOnly="true" styleClass="message"/>
    
    <rich:panel>
    <f:facet name="header">Welcome!</f:facet>
    <p>
    <h:outputText value="Test: #{foo}"/>
    </p>
  
    </rich:panel>
...

But foo (the Text) isn´t displayed.

2. Version

I added a getter-method like someone in a forum told  me:
   

@Out
public String foo = "That is a test";
     
public String getFoo() {
     return foo;
}

The xhtml-page is still like in Version 1:

<h:outputText value="Test: #{foo}"/>  

But foo (the Text) isn´t displayed.

3. Version

The bean is the same as in version 2, with a getter-method.

In the xhtml-page I call the bean directly:

<h:outputText value="Test: #{basicBean.foo}"/>

The result is

javax.faces.FacesException: javax.el.PropertyNotFoundException: /home.xhtml @18,51 value="Test: #{basicBean.foo}": Property 'foo' not found on type org.javassist.tmp.java.lang.Object_$$_javassist_1

Can anybody tell me what I am doing wrong?
Thank you very much.
NSchweig

[michaelcourcy]

Outjection occurs after you have invoked one of the method of the bean.

As you invoke none, no outjection happen.

[nschweig.nicole.schweighardt.t-online.de]

Hi,

and thanks for your answer.

I now invoked the getFoo-method.

<h:outputText value="Test: #{getFoo}"/>

 
But nothing happens.

Then I wrote another method.

...
    @Out
     public String foo = "That is a test";
     

     public String getFoo() {
          return foo;
     }
     
     public void testAction(){
          ...
     }
...

and invoked it:

  <h:outputText value="Test: #{testAction}"/>

I started JBoss in Debug-mode but the method isn´t invoked by seam.

Any ideas?

Thank you
NSchweig

[tony.herstell1]

basicBean.getFoo()

or

basicBean.foo

perhaps...

Check your server startup and see if basicBean is being deployed.

[schlegel]

Hi Nicole

You have to check the spec - but you try to outject a non seam-component...

Please try the following...

    @Out(required = false, scope = ScopeType.SESSION)
     public String foo = "That is a test";

Best regards
hans

[zergspirit]

Don't forget to declare your foo's getter and setter into your BasicBeanLocal interface, it's needed since you'be made your component an EJB.
Since it's not needed, you can simply remove your @Stateful annotation and not impletement any interface.
Still, you'll need public getter and setter for your foo property, and you'll need to reference it like that:

#{basicBean.foo}

Though, this is not an outjection.
Thing is outjection isn't used like that. You often use it to outject a variable you need to use after you've done some business.
Something like:

@Name("basicBean")
public class BasicBean {
     
    @Out
    private String foo = "That is a test";
     
    @In FacesMessages facesMessages;
    
    public void testMethod()
    {
      foo = "test";
    }
}

An in a simple page:

<s:button value="test" var="#{basicBean.testMethod()}"
<h:outputText value="#{foo}"/>

This way it will work and demonstrate how it's used.

[nschweig.nicole.schweighardt.t-online.de]

Hello everyone

thanks for your help!

I think Ill read something about seam concepts before I start any other try with outjection..

For the moment I only need to display some data with radiobuttons. I know like it works with jsf and managed backing beans; now I want to try the same with seam. If I understood you right, I don´t need any out- or injection.

I got an example, were displaying works:

Entity:

@Entity
@Name("product")
public class Product implements Serializable{

     private Integer id;
     private String name;
     private String price;
     private String category;
     private String shortDescription;
     private Integer numberOf;
...

The Entity has getters and setters for the attributes.

Bean:

@Name("shopWebSiteBean")
public @Stateful class ShopWebSiteBean implements ShopWebSite {

     @PersistenceContext(unitName="ShopSeam")
     EntityManager em;
     
     private List<Product> games;
     private Product chosenGame;

     public List<Product> getGames(){
          
               Query q = em.createQuery("select p from Product p where p.category = :n");
               q.setParameter("n","Spiele-Software");
               games = (List<Product>)q.getResultList();
               return games;
     }

     public void setGames(List<Product> games) {
          this.games = games;
     }

     public Product getChosenGame() {
          return chosenGame;
     }

     public void setChosenGame(Product chosenGame) {
          this.chosenGame = chosenGame;
     }
     
     @Destroy @Remove
     public void destroy(){     }
}

JSF:

<h:form>
 <h:selectOneRadio value="#{shopWebSiteBean.chosenGame.name}">
  <s:selectItems value="#{shopWebSiteBean.games}" var="game" label="#{game.name}"/>
  <s:convertEntity/>                        
 </h:selectOneRadio>     
<h:commandButton...
...
</h:form>

I know it from jsf that if you click the h:commandButton the selected radio button value is written in chosenGame.(the setter-method is invoked; )
But that does not work here. setChosenGame is not invoked if I click the button.
It is the same if I try

 <h:selectOneRadio value="#{shopWebSiteBean.chosenGame.name}">

or

 <h:selectOneRadio value="#{shopWebSiteBean.chosenGame}">

Could anyone help me again?
Thank you
NSchweig