How can I check if an object stored with @WindowScoped is stored correctly?

问题

Two days ago I wrote this question: How can I retrieve an object on @WindowScoped? and BalusC answered with some suggestions, now I have some problem to understand if my problem is that the object in WindowScoped is stored properly or my code to retrieve it is wrong!

Well, as I said, I have an object that I stored in @WindowScoped annotation but I can retrive this object only the first time! Why?

I just have a doubt: the CODI extension of MyFaces could be configured in some manner? Or I can use it simple adding the jar files to my project?

However, these are parts of my code because I don't know where is the problem:

LogicBean.java (the object that I should retrive):

@ManagedBean (name="logicBean" )
@WindowScoped
public class LogicBean implements Serializable 
{
    String pageIncluded;
    // getter and setter methods

    public String action(String value)
    {
        setPageIncluded(value);

        return "include";
    }
}

include.xhtml:

<ui:include src="#{logicBean.pageIncluded}"/>

ProgettiController.java

@ManagedBean(name = "progettiController")
@SessionScoped
public class ProgettiController implements Serializable {

    private FacesContext context = FacesContext.getCurrentInstance();
    private LogicBean logicBean = context.getApplication().evaluateExpressionGet(context, "#{logicBean}", LogicBean.class);
    //getter and setter methods

    public void testMethod()
    {
        logicBean.action("WEB-INF/jsf/page1.xhtml");
    }
}

I tried also using @ManagedProperty("#{logicBean}") and setting the scope as WindowScoped but nothing change...

EDIT: after some new trials I found a strange problem, on my include.xhtml I added #{progettiController.logicBean.getPageIncluded()} and #{logicBean.getPageIncluded()} for check these two fields o?

Well, when I load the application for the first time the variables are correctly set and I see what I want, the second time the first variable is setted with the new value but the second is empty and I don't see anything, but now is coming the strange thing... if I should try again the app I should open index.xhtml where I had some forms like this:

<h:form>
    <h:commandLink action="#{logicBean.action('/WEB-INF/jsf/progetti/List.xhtml')}" value="Show All Progetti Items"/>
</h:form>

and which is the result? The first variable remains set with the old value (wrong) but the second is setted correctly so I can review the page like I would! If someone can help me I will thank him/her forever!

回答1:

CODI is an extension to CDI, so you should manage your beans by CDI @Named annotation instead of the JSF @ManagedBean annotation. Then you can inject the other bean by CDI @Inject annotation. The following example should work:

import javax.inject.Named;
import org.apache.myfaces.extensions.cdi.core.api.scope.conversation.WindowScoped;

@Named
@WindowScoped
public class LogicBean implements Serializable {
    // ...
}

and

import javax.enterprise.context.SessionScoped;
import javax.inject.Inject;
import javax.inject.Named;

@Named
@SessionScoped
public class ProgettiController implements Serializable {

    @Inject
    private LogicBean logicBean;

    // ...
}

来源：https://stackoverflow.com/questions/8939037/how-can-i-check-if-an-object-stored-with-windowscoped-is-stored-correctly

标签

jsf-2

myfaces

codi