O ViewScoped funciona como RequestScoped - por quê?

Question

Mar 07, 2011, 02:43 PM

O ViewScoped funciona como RequestScoped - por quê?

Eu escrevi um ViewScoped Managed-Bean e toda vez que atualizo a página no meu navegador da Web, o Managed-Bean parece ser recriado, o artigo é nulo, carrega um novo artigo-objeto e assim por diante. Para mim, parece o mesmo comportamento que o RequestScoped.

Eu uso o Eclipse IDE para desenvolvedores Java EE, o mais novo JDK, Apache Tomcat 7.0.8 e Mojarra 2.0.3.

O que está errado?

Bean gerenciado:

...
import javax.annotation.PostConstruct;
import javax.faces.application.FacesMessage;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ManagedProperty;
import javax.faces.bean.ViewScoped;
import javax.faces.context.FacesContext;
...
@ManagedBean
@ViewScoped
public class CreateArticle {

    @ManagedProperty(value = "#{index.facade}")
    private PersistenceFacade facade;
    private Article article;
    private Vector<ArtCategory> artcat;

    public CreateArticle() {
        artcat = ArtCategory.listArtCat();
    }

    @PostConstruct
    public void postCreateArticle() {
        if (article == null) {
            try {
                article = facade.createArticle();
            } catch (DAOException e) {
                e.printStackTrace();
            }
        }
    }

    public void setFacade(PersistenceFacade facade) {
        this.facade = facade;
    }

    public Vector<ArtCategory> getArtcat() {
        return artcat;
    }

    public Article getArticle() {
        return article;
    }

    public String save() {
        try {
            facade.save(article);
            facade.commit();
        } catch (DAOException e) {
            e.printStackTrace();
        }
        FacesMessage message = new FacesMessage(
                "Successful!");
        FacesContext.getCurrentInstance().addMessage(null, message);
        return "/testpage.xhtml";
    }

}

createArticle.xhtml:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
    xmlns:f="http://java.sun.com/jsf/core"
    xmlns:h="http://java.sun.com/jsf/html">
<h:head>
    <title>Create article</title>
</h:head>
<h:body>
    <h1>
        <h:outputText value="System" />
    </h1>
    <h2>
        <h:outputText value="Test1" />
    </h2>
    <h3>
        <h:outputText value="Test2" />
    </h3>
    <h:form>
        <h:panelGrid columns="3">
            <h:outputLabel for="artname">Articlename</h:outputLabel>
            <h:inputText id="artname" value="#{createArticle.article.artname}"
                required="true">
                <f:ajax event="blur" render="artnameMessage" />
            </h:inputText>
            <h:message id="artnameMessage" for="artname" />

            <h:outputLabel for="briefdesc">Brief description</h:outputLabel>
            <h:inputTextarea id="briefdesc"
                value="#{createArticle.article.briefdesc}" required="false">
                <f:ajax event="blur" render="briefdescMessage" />
            </h:inputTextarea>
            <h:message id="briefdescMessage" for="briefdesc" />

            <h:outputLabel for="price">Price</h:outputLabel>
            <h:inputText id="price" value="#{createArticle.article.price}"
                required="true">
                <f:ajax event="blur" render="priceMessage" />
            </h:inputText>
            <h:message id="priceMessage" for="price" />

            <h:outputLabel for="selectartcat">Article Category</h:outputLabel>
            <h:selectOneMenu id="selectartcat"
                value="#{createArticle.article.artcatnr}" required="true">
                <f:selectItems value="#{createArticle.artcat}" var="artcat"
                    itemLabel="#{artcat.name}" itemValue="#{artcat.artcatnr}" />
                <f:ajax event="blur" render="selectartcatMessage" />
            </h:selectOneMenu>
            <h:message id="selectartcatMessage" for="selectartcat" />

            <h:panelGroup />
            <h:commandButton value="Save"
                action="#{createArticle.save}">
                <f:ajax execute="@form" render="@form" />
            </h:commandButton>
            <h:messages globalOnly="true" layout="table" />
        </h:panelGrid>
    </h:form>
</h:body>
</html>