JTA Eclipselink在提交后不更新实体

Question

我在JTA和Wildfly8中使用Eclipselink，问题是在提交用户事务并将数据插入数据库后，它不会更新相关实体，所以如果我重新加载页面或打开页面的新实例，它加载数据时不会插入行。

@ManagedBean
@ViewScoped
public class empcreator {

UserTransaction ut=null;

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

Context icontext=null;
public empcreator() throws NamingException{
    icontext=new InitialContext();
    ut=(UserTransaction)icontext.lookup("java:comp/UserTransaction");
}

    public void addElementToIsland() throws NamingException, NotSupportedException, SystemException, SecurityException, IllegalStateException, RollbackException, HeuristicMixedException, HeuristicRollbackException{
    int objectid=Integer.parseInt(FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get("objectid"));
    int x=Integer.parseInt(FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get("x"));
    int y=Integer.parseInt(FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get("y"));
    int z=Integer.parseInt(FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get("z"));
    int r=Integer.parseInt(FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get("r"));
    int islid=selectedisland;

    Query q=em.createNamedQuery("Element.findOne");
    q.setParameter("id", objectid);
    Element element=(Element)q.getResultList().get(0);

    q=em.createNamedQuery("Island.findOne");
    q.setParameter("islandid", islid);
    Island isl=(Island)q.getResultList().get(0);

    islandsobjects el=new islandsobjects();
    el.setElement(element);
    el.setX(x);
    el.setY(y);
    el.setZ(z);
    el.setR(r);
    el.setIsland(isl);

    ut.begin();
    em.persist(el);
    ut.commit();
}

    public void loadIsland(ActionEvent e){
    Query q=em.createNamedQuery("Island.findOne");
    q.setParameter("islandid", selectedisland);
    List<islandsobjects> iobjects=((Island)q.getResultList().get(0)).getIobjects();
    JsonObjectBuilder jsonOB=Json.createObjectBuilder();
    JsonArrayBuilder jsonAB=Json.createArrayBuilder();
    for(int i=0;i<iobjects.size();i++){
        jsonOB.add("id", iobjects.get(i).getId());
        Element element=iobjects.get(i).getElement();
        jsonOB.add("name", element.getName());
        jsonOB.add("x", iobjects.get(i).getX());
        jsonOB.add("y", iobjects.get(i).getY());
        jsonOB.add("z", iobjects.get(i).getZ());
        jsonOB.add("r", iobjects.get(i).getR());
        jsonOB.add("objectid", iobjects.get(i).getObjectid());
        jsonOB.add("islandid", selectedisland);
        jsonAB.add(jsonOB);
    }
    JsonObject jsElements=Json.createObjectBuilder().add("elements", jsonAB).build();
    RequestContext.getCurrentInstance().execute("loadisland("+jsElements.toString()+")");
}

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
<persistence-unit name="game" transaction-type="JTA">
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
    <jta-data-source>java:jboss/datasources/boddooo</jta-data-source>
    <class>boddooo.entity.Empire</class>
    <class>boddooo.entity.Empiresobject</class>
    <class>boddooo.entity.Island</class>
    <class>boddooo.entity.Element</class>
    <class>boddooo.entity.User</class>
    <class>boddooo.entity.World</class>
    <class>boddooo.entity.islandsobjects</class>
      <properties>
          <property name="eclipselink.target-server" value="JBoss"/>
          <property name="eclipselink.logging.level" value="FINE"/>
          <property name="eclipselink.persistence-context.flush-mode" value="auto" />
      </properties>
</persistence-unit>
</persistence>

Answer 1

当我禁用缓存时，它解决了问题，但变得更慢，然后我使用这个

query.setHint("javax.persistence.cache.storeMode", "REFRESH");

它在没有禁用缓存的情况下更新了数据