我失去了很多时间尝试解决这个发行人，但我在同一个地方。我怀疑我将一些CDI与EJB混合在一起。
问题是持续存在而删除只是不起作用。
Caused by: javax.persistence.TransactionRequiredException: WFLYJPA0060: Transaction is required to perform this operation (either use a transaction or extended persistence context)
at org.jboss.as.jpa.container.AbstractEntityManager.transactionIsRequired(AbstractEntityManager.java:866)
at org.jboss.as.jpa.container.AbstractEntityManager.persist(AbstractEntityManager.java:579)
at com.oki.scope.console.model.dao.GenericDAO.save(GenericDAO.java:29)
at com.oki.scope.console.model.dao.GenericConsoleDAO.save(GenericConsoleDAO.java:12)
at com.oki.scope.console.service.ServidorServiceImp.salvar(ServidorServiceImp.java:27)
at com.oki.scope.console.service.ServidorServiceImp$Proxy$_$$_WeldClientProxy.salvar(Unknown Source)
at com.oki.scope.console.managedBean.consulta.ServidorMB.salvar(ServidorMB.java:65)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.sun.el.parser.AstValue.invoke(AstValue.java:292)
at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:304)
at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40)
at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50)
at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40)
at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50)
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:87)
... 40 more
我的DAO
public class GenericDAO<T, K> {
protected EntityManager em;
private Class<T> entityClass;
public GenericDAO(Class<T> entityClass, EntityManager em) {
this.entityClass = entityClass;
this.em = em;
}
@Transactional
protected void save(T entity) {
em.persist(entity);
}
Generic DAO：
import javax.persistence.EntityManager;
public abstract class GenericConsoleDAO<T, K> extends GenericDAO<T, K> {
public GenericConsoleDAO(Class<T> entityClass, EntityManager em) {
super(entityClass, em);
}
public void save(T t){
super.save(t);
}
}
DAO工厂：
package com.oki.scope.console.model.dao;
import java.lang.reflect.InvocationTargetException;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import javax.ejb.Singleton;
import javax.ejb.TransactionManagement;
import javax.ejb.TransactionManagementType;
import javax.enterprise.inject.Produces;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
@Singleton
@TransactionManagement(TransactionManagementType.CONTAINER)
public class DAOConsoleFactory {
private final static String UNIT_NAME = "scope-console";
private static Map<String, Object> mapa = Collections.synchronizedMap(new HashMap<String, Object>());
@PersistenceContext(unitName = UNIT_NAME )
private EntityManager entityManager;
@Produces public ServidorDAO criaServidorDAO(){ return getDAO(ServidorDAO.class); }
@Produces public ConexaobdDAO criaConexaoDAO(){ return getDAO(ConexaobdDAO.class); }
@Produces public ContratoDAO criaContratoDAO(){ return getDAO(ContratoDAO.class); }
@Produces public EmpresaDAO criaEmpresaDAO(){ return getDAO(EmpresaDAO.class); }
@Produces public LojaDAO criaLojaDAO(){ return getDAO(LojaDAO.class); }
//@Produces public RedeAutorizadoraDAO criaRedeAutorizadoraDAO(){ return getDAO(RedeAutorizadoraDAO.class); }
@Produces public RedeDAO criaRedeDAO(){ return getDAO(RedeDAO.class); }
@Produces public RoteadorDAO criaRoteadorDAO(){ return getDAO(RoteadorDAO.class); }
@Produces public TerminalDAO criaTerminalDAO(){ return getDAO(TerminalDAO.class); }
@Produces public TipoHeaderDAO criaTipoHeaderDAO(){ return getDAO(TipoHeaderDAO.class); }
@SuppressWarnings("unchecked")
public <E> E getDAO(Class<E> classe){
String key = classe.getSimpleName();
if (!mapa.containsKey(key))
{
try {
mapa.put(key, classe.getDeclaredConstructor(EntityManager.class).newInstance(entityManager));
} catch (InstantiationException | IllegalAccessException | IllegalArgumentException
| InvocationTargetException | NoSuchMethodException | SecurityException e) {
System.out.println("Classe "+ key +" não possui um construtor que tenha EntityManager como parametro.");
}
}
return (E)mapa.get(key);
}
}
我的课程：
@Named
@ApplicationScoped
public class ServidorServiceImp implements ServidorService {
@Inject private ServidorDAO dao;
@Override
public List<Servidor> getLista() {
return dao.getLista();
}
@Override
public void salvar(Servidor servidor) {
if (servidor.getId()==0){
dao.save(servidor);
}
else
{
dao.update(servidor);
}
}
@Override
public void remover(Servidor servidor) {
dao.delete(servidor);
}
}
答案 0 :(得分：4)
在尝试增强性能时，您已经规避了容器应该为您做的事情，即在事务中实例化bean。
我想从Page<Request> findAllByState(@Param( "id" ) Long stateId, Pageable pageable);
中删除@Singleton和@TransactionManagement(TransactionManagementType.CONTAINER)，并允许EJB事务由使用DAO的EJB bean处理。
更新：此外，DAOConsoleFactory不是EJB注释类@ApplicationScoped需要是EJB bean，因此，应使用ServidorServiceImp或@Stateless进行注释并删除@Statefull。它读起来就像一个无状态的EJB bean，因此不需要使它成为应用程序作用域。
同样，在我看来，如果没有很好地理解EJB应该如何在容器中工作，那么您在集中精力优化性能。我建议让一切工作并遵循架构最佳实践，特别是在“SessionFaçade”概念中。其中一些帖子可能有所帮助：What is the point of a Facade in Java EE?或Why use Facade pattern for EJB session bean。
答案 1 :(得分：2)
解决：前2天痛苦。问题出在我的班级。 @Named在哪里 @ApplicationScoped，我改为@Statefull。