EJB 3.1依赖注入失败 [英] EJB 3.1 Dependency Injection Failed
问题描述
我创建了一个无状态会话bean，如下所示：
@WebServlet（name =ProductController，urlPatterns = { / ProductController}）
public class ProductController extends HttpServlet {
@EJB
private ProductFacadeBean productBean;
}
@Stateless
public class ProductFacadeBean extends AbstractFacade< Product>实现ProductFacadeLocalInterface {
@PersistenceContext（unitName =OnlineStorePU）
private EntityManager em;
protected EntityManager getEntityManager（）{
return em;
}
public ProductFacadeBean（）{
super（Product.class）;
}
}
@Local
public interface ProductFacadeLocalInterface {
void create（Product product）;
void edit（产品）;
void remove（产品产品）;
产品查找（Object id）;
列表<产品>的findAll（）;
列表<产品> findRange（int [] range）;
int count（）;
}
public abstract class AbstractFacade< T> {
private 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（）。
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]）;
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（）;
}
}
问题：
-
有什么错误？如何
解决它？
javax.naming.NamingException：查找
失败
'java ：comp / env / Controller.ProductController / productBean'
in
SerialContext [myEnv = {java.naming.factory.initial = com.sun.enterprise.naming.impl.SerialInitContextFactory，
java .naming.factory.state = com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl，
java.naming.factory.url.pkgs = com.sun.enterprise.naming}
[根异常是
javax.naming.NamingException：
异常解析Ejb for'Remote
ejb-ref
name = Controller.ProductController / productBean，Remote
3.x interface = EJB.ProductFacadeBean，ejb-link = null，lookup =，mappedName =，jndi-name = EJB.ProductFacadeBean，refType = Session'
。实际（可能是内部的）远程
用于查找的JNDI名称是
'EJB.ProductFacadeBean＃EJB.ProductFacadeBean'
[根异常是
javax.naming.NamingException：Lookup
failed for
'EJB.ProductFacadeBean＃EJB.ProductFacadeBean'
in
SerialContext [myEnv = {java.naming.factory.initial = com.sun.enterprise.naming.impl.SerialInitContextFactory ，
java.naming.factory.state = com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl，
java.naming.factory.url.pkgs = com.sun.enterprise.naming }
[根异常是
javax.naming.NameNotFoundException：
EJB.ProductFacadeBean＃EJB.ProductFacadeBean
not found]]]
完整的例外是附在这里：
code> HTTP状态500 -
类型异常报告
消息
描述服务器遇到内部错误（），阻止其实现这个请求。
异常
javax.servlet.ServletException：PWC1392：实例化servlet类的错误Controller.ProductController
根本原因
com.sun.enterprise.container.common.spi.util.InjectionException：为Controller.ProductController创建管理对象时出错
根本原因
com.sun.enterprise.container .common.spi.util.InjectionException：异常尝试注入远程ejb-ref name = Controller.ProductController / productBean，远程
3.x接口= EJB.ProductFacadeBean，ejb-link = null，lookup =，mappedName = ，jndi-name = EJB.ProductFacadeBean，refType = Session into Class Controller.ProductController
根本原因
javax.naming.NamingException：java：comp / env查找失败/Controller.ProductController/productBean'在SerialContext中[myEnv = {java.naming.factory.initial = com.sun.enterprise.naming.impl.SerialInitContextFactory，java.naming.factory.state = com.sun.corba.ee.impl .presentation.rmi.JNDIStateFactoryImpl ，java.naming.factory.url.pkgs = com.sun.enterprise.naming} [根异常是javax.naming.NamingException：异常解析Ejb for'Remote ejb-ref name = Controller.ProductController / productBean，Remote
3.x interface = EJB.ProductFacadeBean，ejb-link = null，lookup =，mappedName =，jndi-name = EJB.ProductFacadeBean，refType = Session'。用于查找的实际（可能是内部的）远程JNDI名称是'EJB.ProductFacadeBean＃EJB.ProductFacadeBean'[Root exception is javax.naming.NamingException：Lookup failed for'EJB.ProductFacadeBean＃EJB.ProductFacadeBean'in SerialContext [myEnv = {java .naming.factory.initial = com.sun.enterprise.naming.impl.SerialInitContextFactory，java.naming.factory.state = com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl，java.naming.factory.url .pkgs = com.sun.enterprise.naming} [根异常是javax.naming.NameNotFoundException：EJB.ProductFacadeBean＃EJB.ProductFacadeBean not found]]]
根本原因
javax.naming.NamingException：异常解析Ejb for'Remote ejb-ref name = Controller.ProductController / productBean，Remote
3.x interface = EJB.ProductFacadeBean，ejb-link = null，lookup =，mappedName = jndi-name = EJB.ProductFacadeBean，refType = Session'。用于查找的实际（可能是内部的）远程JNDI名称是'EJB.ProductFacadeBean＃EJB.ProductFacadeBean'[Root exception is javax.naming.NamingException：Lookup failed for'EJB.ProductFacadeBean＃EJB.ProductFacadeBean'in SerialContext [myEnv = {java .naming.factory.initial = com.sun.enterprise.naming.impl.SerialInitContextFactory，java.naming.factory.state = com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl，java.naming.factory.url .pkgs = com.sun.enterprise.naming} [根异常是javax.naming.NameNotFoundException：EJB.ProductFacadeBean＃EJB.ProductFacadeBean not found]]
根本原因
javax.naming.NamingException：在SerialContext中的'EJB.ProductFacadeBean＃EJB.ProductFacadeBean'的查找失败[myEnv = {java.naming.factory.initial = com.sun.enterprise.naming.impl.SerialInitContextFactory，java.naming.factory。 state = com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl，java.naming.factory.url.pkgs = com.sun.enterprise.naming} [根异常是javax .naming.NameNotFoundException：EJB.ProductFacadeBean＃EJB.ProductFacadeBean not found]
根本原因
javax.naming.NameNotFoundException：EJB.ProductFacadeBean＃EJB.ProductFacadeBean not found
注意在GlassFish Server Open Source Edition 3.1日志中提供了异常的完整堆栈跟踪及其根本原因。 GlassFish Server开源版3.1
- 当我为$ b创建会话$ b实体bean使用netbeans it
为我们创建了抽象的外观？
目的是什么？我知道门面
模式是作为
的接口路由请求？ - ejb-jar.xml的用途是什么？
所有设置都是默认设置。
ejb bean是在java ee 6 web应用程序内创建的，而不是在另一个war或jar中。
Glassfish 3.1服务器。
请帮忙。
谢谢。
你必须使用界面。如果您使用 Seam Solder 和 CDI ，则可以使用
$ b指定确切的实现$ b
@Inject
@Exact（ProductFacadeBean.class）
i have created a stateless session bean like this :
@WebServlet(name = "ProductController", urlPatterns = {"/ProductController"})
public class ProductController extends HttpServlet {
@EJB
private ProductFacadeBean productBean;
}
@Stateless
public class ProductFacadeBean extends AbstractFacade<Product> implements ProductFacadeLocalInterface {
@PersistenceContext(unitName = "OnlineStorePU")
private EntityManager em;
protected EntityManager getEntityManager() {
return em;
}
public ProductFacadeBean() {
super(Product.class);
}
}
@Local
public interface ProductFacadeLocalInterface {
void create(Product product);
void edit(Product product);
void remove(Product product);
Product find(Object id);
List<Product> findAll();
List<Product> findRange(int[] range);
int count();
}
public abstract class AbstractFacade<T> {
private 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]);
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();
}
}
Question :
What is the error about ? How to solve it ?
javax.naming.NamingException: Lookup failed for 'java:comp/env/Controller.ProductController/productBean' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl, java.naming.factory.url.pkgs=com.sun.enterprise.naming} [Root exception is javax.naming.NamingException: Exception resolving Ejb for 'Remote ejb-ref name=Controller.ProductController/productBean,Remote 3.x interface =EJB.ProductFacadeBean,ejb-link=null,lookup=,mappedName=,jndi-name=EJB.ProductFacadeBean,refType=Session' . Actual (possibly internal) Remote JNDI name used for lookup is 'EJB.ProductFacadeBean#EJB.ProductFacadeBean' [Root exception is javax.naming.NamingException: Lookup failed for 'EJB.ProductFacadeBean#EJB.ProductFacadeBean' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl, java.naming.factory.url.pkgs=com.sun.enterprise.naming} [Root exception is javax.naming.NameNotFoundException: EJB.ProductFacadeBean#EJB.ProductFacadeBean not found]]]
The full exception is attached here :
HTTP Status 500 -
type Exception report
message
descriptionThe server encountered an internal error () that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: PWC1392: Error instantiating servlet class Controller.ProductController
root cause
com.sun.enterprise.container.common.spi.util.InjectionException: Error creating managed object for class Controller.ProductController
root cause
com.sun.enterprise.container.common.spi.util.InjectionException: Exception attempting to inject Remote ejb-ref name=Controller.ProductController/productBean,Remote
3.x interface =EJB.ProductFacadeBean,ejb-link=null,lookup=,mappedName=,jndi-name=EJB.ProductFacadeBean,refType=Session into class Controller.ProductController
root cause
javax.naming.NamingException: Lookup failed for 'java:comp/env/Controller.ProductController/productBean' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl, java.naming.factory.url.pkgs=com.sun.enterprise.naming} [Root exception is javax.naming.NamingException: Exception resolving Ejb for 'Remote ejb-ref name=Controller.ProductController/productBean,Remote
3.x interface =EJB.ProductFacadeBean,ejb-link=null,lookup=,mappedName=,jndi-name=EJB.ProductFacadeBean,refType=Session' . Actual (possibly internal) Remote JNDI name used for lookup is 'EJB.ProductFacadeBean#EJB.ProductFacadeBean' [Root exception is javax.naming.NamingException: Lookup failed for 'EJB.ProductFacadeBean#EJB.ProductFacadeBean' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl, java.naming.factory.url.pkgs=com.sun.enterprise.naming} [Root exception is javax.naming.NameNotFoundException: EJB.ProductFacadeBean#EJB.ProductFacadeBean not found]]]
root cause
javax.naming.NamingException: Exception resolving Ejb for 'Remote ejb-ref name=Controller.ProductController/productBean,Remote
3.x interface =EJB.ProductFacadeBean,ejb-link=null,lookup=,mappedName=,jndi-name=EJB.ProductFacadeBean,refType=Session' . Actual (possibly internal) Remote JNDI name used for lookup is 'EJB.ProductFacadeBean#EJB.ProductFacadeBean' [Root exception is javax.naming.NamingException: Lookup failed for 'EJB.ProductFacadeBean#EJB.ProductFacadeBean' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl, java.naming.factory.url.pkgs=com.sun.enterprise.naming} [Root exception is javax.naming.NameNotFoundException: EJB.ProductFacadeBean#EJB.ProductFacadeBean not found]]
root cause
javax.naming.NamingException: Lookup failed for 'EJB.ProductFacadeBean#EJB.ProductFacadeBean' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl, java.naming.factory.url.pkgs=com.sun.enterprise.naming} [Root exception is javax.naming.NameNotFoundException: EJB.ProductFacadeBean#EJB.ProductFacadeBean not found]
root cause
javax.naming.NameNotFoundException: EJB.ProductFacadeBean#EJB.ProductFacadeBean not found
note The full stack traces of the exception and its root causes are available in the GlassFish Server Open Source Edition 3.1 logs. GlassFish Server Open Source Edition 3.1
- When i created the session for entity bean using netbeans it created the abstract facade for us ? What is the purpose ? I know facade pattern is to serve as interface to route the request ?
- What is the use of ejb-jar.xml ?
All settings are default. The ejb bean is created inside java ee 6 web application rather than in another war or jar. Glassfish 3.1 server.
Please help.
Thanks.
you must use the interface. If you use Seam Solder and CDI you can specify the exact implementation with
@Inject
@Exact(ProductFacadeBean.class)
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