无法使用EclipseLink保持

时间:2018-09-09 05:00:49

标签: java jpa glassfish wildfly jta

我正在使用Netbeans 8.2,JSF 2.2,JPA,EclipseLink,Maven和Primefaces做一个项目。

我正在使用的模式是Facade。

出现的问题是我无法保留数据。我创建了一个简单的xhtml,还使用一个简单的POJO进行了测试,但是它并没有持久。

奇怪的是,我开始使用Payara带来的Glassfish 4.1.1(因为Glassfish的原始4.1.1提出了要爱连接池的问题)和MySQL 8,然后我尝试了相同的应用程序服务器,但是在PostgreSQL和这两种情况下,我都可以创建一个有效连接的有效池,这使两个数据库都没有问题,但是当我运行该应用程序时,数据不会持久。

然后,我对WildFly 12.0.0进行了完全相同的测试。我尝试为MySQL 8创建一个连接池,为PostreSQL创建另一个连接池。检查两者是否与数据库连接良好,但它们不会持久存在。

我注意到在任何情况下,两个应用程序服务器都不会在运行时抛出错误,就像一切都正确一样。

我很困惑。

在此先感谢您的关注。

POJO代码如下:

import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name = "categoria")
public class Categoria implements Serializable {

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

    @Column(name = "nombre")
    private String nombre;

    @Column(name = "estado")
    private boolean estado = true;

    public int getCodigo() {
        return codigo;
    }

    public void setCodigo(int codigo) {
        this.codigo = codigo;
    }

    public boolean getEstado() {
        return estado;
    }

    public void setEstado(boolean estado) {
        this.estado = estado;
    }

    public String getNombre() {
        return nombre;
    }

    public void setNombre(String nombre) {
        this.nombre = nombre;
    }

}

控制器代码:

import com.mitocode.ejb.CategoriaFacadeLocal;
import com.mitocode.model.Categoria;
import java.io.Serializable;
import javax.annotation.PostConstruct;
import javax.ejb.EJB;
import javax.faces.view.ViewScoped;
import javax.inject.Named;


@Named
@ViewScoped
public class CategoriaController implements Serializable{

    @EJB
    private CategoriaFacadeLocal categoriaEJB;
    private Categoria categoria;

    @PostConstruct
    public void init(){
        categoria = new Categoria();
    }

    public void registrar(){
        try{
            categoriaEJB.create(categoria);
        }
        catch(Exception e){
            //Mostrar mensaje de error de PrimeFaces (Growl)
        }
    }

    public Categoria getCategoria() {
        return categoria;
    }

    public void setCategoria(Categoria categoria) {
        this.categoria = categoria;
    }

}

查看代码:

<?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:h="http://xmlns.jcp.org/jsf/html"
      xmlns:p="http://primefaces.org/ui">
    <h:head>
        <title>Facelet Title</title>
    </h:head>
    <h:body>
        <p:inputText label="Ingrese Categoría" value="#{categoriaController.categoria.nombre}" />
        <p:commandButton value = "Registrar" actionListener = "#{categoriaController.registrar()}"/>
    </h:body>
</html>

Persistence.xml代码:

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
<persistence-unit name="primePU" transaction-type="JTA">
  <jta-data-source>jdbc/primePG</jta-data-source>
  <exclude-unlisted-classes>false</exclude-unlisted-classes>
  <properties>
     <property name="javax.persistence.schema-generation.database.action" value="none"/>
  </properties>
</persistence-unit>
</persistence>

AbstractFacade代码:

import java.util.List;
import javax.persistence.EntityManager;

public abstract class AbstractFacade<T> {

    final Class<T> entityClass;

    public AbstractFacade(Class<T> entityClass) {
        this.entityClass = entityClass;
    }

    protected abstract EntityManager getEntityManager();

    public void create(T entity) {
        getEntityManager().persist(entity);
    }

    public void edit(T entity) {
        getEntityManager().merge(entity);
    }

    public void remove(T entity) {
        getEntityManager().remove(getEntityManager().merge(entity));
    }

    public T find(Object id) {
        return getEntityManager().find(entityClass, id);
    }

    public List<T> findAll() {
        javax.persistence.criteria.CriteriaQuery cq = getEntityManager().getCriteriaBuilder().createQuery();
        cq.select(cq.from(entityClass));
        return getEntityManager().createQuery(cq).getResultList();
    }

    public List<T> findRange(int[] range) {
        javax.persistence.criteria.CriteriaQuery cq = getEntityManager().getCriteriaBuilder().createQuery();
        cq.select(cq.from(entityClass));
        javax.persistence.Query q = getEntityManager().createQuery(cq);
        q.setMaxResults(range[1] - range[0] + 1);
        q.setFirstResult(range[0]);
        return q.getResultList();
    }

    public int count() {
        javax.persistence.criteria.CriteriaQuery cq = 
        getEntityManager().getCriteriaBuilder().createQuery();
        javax.persistence.criteria.Root<T> rt = cq.from(entityClass);
        cq.select(getEntityManager().getCriteriaBuilder().count(rt));
        javax.persistence.Query q = getEntityManager().createQuery(cq);
        return ((Long) q.getSingleResult()).intValue();
    }

}

接口CategoriaFacade本地代码:

import java.util.List;
import javax.ejb.Local;


@Local
public interface CategoriaFacadeLocal {

    void create(Categoria categoria);

    void edit(Categoria categoria);

    void remove(Categoria categoria);

    Categoria find(Object id);

    List<Categoria> findAll();

    List<Categoria> findRange(int[] range);

    int count();

}

EJB CategoriaFacade代码:

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


@Stateless
public class CategoriaFacade extends AbstractFacade<Categoria> implements 
CategoriaFacadeLocal {

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

    @Override
    protected EntityManager getEntityManager() {
        return em;
    }

    public CategoriaFacade() {
        super(Categoria.class);
    }

}

0 个答案:

没有答案