Alterações não refletidas nas entidades JPA após a atualização em h: dataTable

Question

Aug 28, 2011, 05:10 PM

Alterações não refletidas nas entidades JPA após a atualização em h: dataTable

Estou trabalhando com o Eclipse e o Glassfish 3.0. Muito novo nessa tecnologia, embora eu tenha feito coisas semelhantes antes. Muito simples realmente tem uma tabela de dados vinculada a um backing bean. Adicione métodos e remova métodos cobertos - o problema está no método de atualização que estou chamando. Parece que não consigo ver as alterações sendo coletadas no componente (HtmlInputText), independentemente de passar os dados de volta para a tabel

Meu código para a tabela de dados está abaixo (e a página jsf)

<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core">

<f:loadBundle basename="resources.application" var="msg"/>

<head>
    <title><h:outputText value="#{msg.welcomeTitle}" /></title>
</head>
<body>
 <h:form id="mainform">

  <h:dataTable var="row"  border="0" valu,e="#{beanCategory.collection}" binding="#{beanCategory.datatable}">

    <f:facet name="header">
        <h:outputText value="Categories"/>
    </f:facet>
    <h:column>
        <f:facet name="header">
            <h:outputText value="Description"/>
        </f:facet> 

            <h:inputText id="input1" value="#{row.description}" valueChangeListener="#{row.inputChanged}"/>


        </h:column>
    <h:column>
        <f:facet name="header">
            <h:outputText value="Id"/>
        </f:facet>
        <h:outputText id="id" value="#{row.id}"/>
    </h:column>
    <h:column>
            <h:commandButton value="Delete" type="submit" action="#{beanCategory.remove}">

                <f:setPropertyActionListener target="#{beanCategory.selectedcategory}" value="#{row}"/>
            </h:commandButton>
            <h:commandButton value="Save" action="#{beanCategory.update}"
                >
                <f:setPropertyActionListener
                    target="#{beanCategory.selectedcategory}" value="#{row}" />

            </h:commandButton>
        </h:column>
</h:dataTable>

<h:inputText id="text1"></h:inputText>  <h:commandButton action="#{beanCategory.addCategory}" value="Add" type="submit" id="submitbutton">

</h:commandButton>
<br/><br/>
Messages    

<h:messages></h:messages><br /><br />

</h:form>   
 </body>
</html>

Backing Bean está aqui

package net.bssuk.timesheets.controller;

import java.io.Serializable;

import java.util.List;

import javax.faces.component.UIInput;
import javax.faces.component.html.HtmlDataTable;
import javax.faces.context.FacesContext;

import javax.persistence.*;

import net.bssuk.timesheets.model.Category;

@javax.inject.Named("beanCategory")
@javax.enterprise.context.SessionScoped

public class BeanCategory implements Serializable {

private List<Category> collection;
private EntityManagerFactory emf;
private EntityManager em;
private int selectedid;
private Category selectedcategory;
private HtmlDataTable datatable;

private static final long serialVersionUID = 1L;

public BeanCategory() {
    // TODO Auto-generated constructor stub

    System.out.println("Bean Constructor");

}

public String addCategory() {
    try {
        this.emf = Persistence.createEntityManagerFactory("timesheets1");
        System.out.println("Changed - Now attempting to add");
        System.out.println("Ready to do cateogory");
        Category category = new Category();

        FacesContext context = FacesContext.getCurrentInstance();
        UIInput input = (UIInput) context.getViewRoot().findComponent(
                "mainform:text1");

        String value = input.getValue().toString();
        if (value != null) {
            category.setDescription(input.getValue().toString());
        } else {
            category.setDescription("Was null");
        }
        this.em = this.emf.createEntityManager();
        EntityTransaction tx = em.getTransaction();
        tx.begin();
        em.persist(category);
        tx.commit();
        em.close();
        emf.close();
        // return "index.xhtml";
    } catch (Exception e) {
        e.printStackTrace();
    }
    return "return.html";
}

public String remove() {
    try {
        this.emf = Persistence.createEntityManagerFactory("timesheets1");
        System.out.println("Getting Collection");
        this.em = this.emf.createEntityManager();

        FacesContext context = FacesContext.getCurrentInstance();

        System.out.println("Number found is " + this.selectedid);

        if (selectedcategory != null) {

            System.out.println("removing "+selectedcategory.getId()+" - " +selectedcategory.getDescription());
            EntityTransaction tx = em.getTransaction();
            tx.begin();
            System.out.println("Merging..");
            this.em.merge(selectedcategory);
            System.out.println("removing...");
            this.em.remove(selectedcategory);
            tx.commit();
            em.close();
            emf.close();
        }else{
            System.out.println("Not found");
        }
        return "index.xhtml";
    } catch (Exception e) {
        e.printStackTrace();
        return "index.xhtml";
    }

}

public String update() {
    try {
        this.emf = Persistence.createEntityManagerFactory("timesheets1");
        System.out.println("Update Getting Collection");
        Category category = (Category) getDatatable().getRowData();

        FacesContext context = FacesContext.getCurrentInstance();
        System.out.println("PHASE ID="+context.getCurrentPhaseId().toString());

        if (category != null) {
            // DESCRIPTION VALUE BELOW IS ALWAYS OLD VALUE (IE DATA IN DATABASE)
            System.out.println("updating "+category.getId()+" - " +category.getDescription());

            this.em = this.emf.createEntityManager();
            EntityTransaction tx = em.getTransaction();
            tx.begin();
            em.merge(category);
            tx.commit();
            em.close();
            emf.close();
        }else{
            System.out.println("Not found");
        }
        return "index.xhtml";
    } catch (Exception e) {
        e.printStackTrace();
        return "";
    }
}

public void setCollection(List<Category> collection) {
    this.collection = collection;
}

public List<Category> getCollection() {
    // this.emf=Persistence.createEntityManagerFactory("timesheets1");
    // System.out.println("Getting Collection");
    try {
        this.emf = Persistence.createEntityManagerFactory("timesheets1");
        this.em = this.emf.createEntityManager();
        Query query = this.em.createNamedQuery("findAll");
        this.collection = query.getResultList();
        return this.collection;
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }
}

public void setSelectedid(int id) {
    this.selectedid=id;
}

public void setSelectedcategory(Category selectedcategory) {
    this.selectedcategory = selectedcategory;
}

public HtmlDataTable getDatatable() {
    return datatable;
}

public void setDatatable(HtmlDataTable datatable) {
    this.datatable = datatable;
}
public Category getSelectedcategory() {
return selectedcategory;
 }



}

Minha entidade mapeada para JPA está aqui

package net.bssuk.timesheets.model;
import java.io.Serializable;
import javax.persistence.*;


/**
 * The persistent class for the CATEGORIES database table.
 * 
*/
@Entity
@Table(name="CATEGORIES")
@NamedQuery(name="findAll", query = "SELECT c from Category c")
public class Category implements Serializable {
private static final long serialVersionUID = 1L;

private String description;

@Id 
@GeneratedValue(strategy=GenerationType.IDENTITY)
private int id;

public Category() {
}

public String getDescription() {
    return this.description;
}

public void setDescription(String description) {
    this.description = description;
}

public int getId() {
    return this.id;
}

public void setId(int id) {
    this.id = id;
}

}

OK - Atualizei meu código para seguir o exemplo. Eu tentei incorporar um EJB no cenário da seguinte maneira

package net.bssuk.timesheets.ejb;

import java.util.List;

import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;

import net.bssuk.timesheets.model.Category;
@Stateless
public class CategoryEJB implements CategoryEJBRemote {

@PersistenceContext(unitName="timesheets1")
private EntityManager em;

@Override
public List<Category> findCategories() {
    // TODO Auto-generated method stub
    System.out.println("find categories");
    Query query = em.createNamedQuery("findAll");
    return query.getResultList();
}

@Override
public Category createCategory(Category category) {
    // TODO Auto-generated method stub
    em.persist(category);
    return category;
}

@Override
public Category udpateCategory(Category category) {
    // TODO Auto-generated method stub
    return em.merge(category);
}

@Override
public void deleteCategory(Category category) {
    // TODO Auto-generated method stub
        em.remove(em.merge(category));
}

}

My EJB está abaixo

package net.bssuk.timesheets.ejb;

import java.util.List;

import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;

import net.bssuk.timesheets.model.Category;
@Stateless
public class CategoryEJB implements CategoryEJBRemote {

@PersistenceContext(unitName="timesheets1")
private EntityManager em;

@Override
public List<Category> findCategories() {
    // TODO Auto-generated method stub
    System.out.println("find categories");
    Query query = em.createNamedQuery("findAll");
    return query.getResultList();
}

@Override
public Category createCategory(Category category) {
    // TODO Auto-generated method stub
    em.persist(category);
    return category;
}

@Override
public Category udpateCategory(Category category) {
    // TODO Auto-generated method stub
    return em.merge(category);
}

@Override
public void deleteCategory(Category category) {
    // TODO Auto-generated method stub
        em.remove(em.merge(category));
}

}

Alguém pode sugerir se este tipo de parece ok? Ou perdi completamente o enredo com ele!