我正在将一些代码输入到在Ubuntu框上运行的Hudson Server中,以便在代码上运行一些代码度量(Sonar)和Cobertura。该项目运行Glassfish3.1,使用Maven3,用Java编写,JSF 2.0并使用OracleXE数据库(不相关)。
尝试在JUnit测试中创建Facade实例时会抛出错误。当我从Netbeans运行测试时,测试运行正常,但是当Hudson自动构建它时,我得到了这个错误:
java.lang.ClassCastException: $Proxy96 cannot be cast to ticket.app.DatesFacade
at ticket.app.EventsControllerTest.setUp(EventsControllerTest.java:60)
at junit.framework.TestCase.runBare(TestCase.java:128)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:120)
at junit.framework.TestSuite.runTest(TestSuite.java:230)
at junit.framework.TestSuite.run(TestSuite.java:225)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at org.apache.maven.surefire.junit.JUnitTestSet.execute(JUnitTestSet.java:207)
at org.apache.maven.surefire.junit.JUnit3Provider.executeTestSet(JUnit3Provider.java:107)
at org.apache.maven.surefire.junit.JUnit3Provider.invoke(JUnit3Provider.java:79)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at org.apache.maven.surefire.booter.ProviderFactory$ClassLoaderProxy.invoke(ProviderFactory.java:103)
at $Proxy0.invoke(Unknown Source)
at org.apache.maven.surefire.booter.SurefireStarter.invokeProvider(SurefireStarter.java:145)
at org.apache.maven.surefire.booter.SurefireStarter.runSuitesInProcess(SurefireStarter.java:87)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:69)
Hudson服务器不是从JBoss运行的,它是从Tomcat运行的。我添加了这个细节,因为当我谷歌这个错误时,除了JBoss错误之外,我什么都没发现,这个错误解释了在WAR和EAR文件中都引用了facade。
编辑:这就是我目前正在创建Facade的实例(在通过Netbeans GF3.1运行测试时工作正常):
Map properties = new HashMap();
properties.put(EJBContainer.MODULES, new File("target/classes"));
properties.put("org.glassfish.ejb.embedded.glassfish.configuration.file", "server/config/domain.xml");
properties.put("oracle.jdbc.OracleDriver", "server/lib/ojdbc14.jar");
ejbContainer = EJBContainer.createEJBContainer(properties);
ctx = ejbContainer.getContext();
EventsFacade instance = (EventsFacade)ctx.lookup("java:global/classes/EventsFacade");
编辑:我的EventsFacade:
@Stateful
public class EventsFacade extends AbstractFacade<Events> {
@PersistenceContext(unitName = "tickets_AppTicket_war_1.0-SNAPSHOTPU")
private EntityManager em;
protected EntityManager getEntityManager() {
return em;
}
public EventsFacade() {
super(Events.class);
}
}
编辑:并且我的AbstractFacade已经完整:
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();
}
}
编辑:创建新界面:
@Local
public interface EventsInterface<Events> {
int count();
void create(Events entity);
void edit(Events entity);
Events find(Object id);
List<Events> findAll();
List<Events> findRange(int[] range);
void remove(Events entity);
}
已更改: EventsFacade delaration:
public class EventsFacade extends AbstractFacade<Events> implements EventsInterface<Events> {
编辑:在创建新界面后在IDE中收到代理错误后,输出开始显示:
Field Name == intfClass
Field == interface ticket.app.EventsInterface
Field Name == containerId
Field == 85313541807800321
Field Name == delegate
Field == com.sun.ejb.containers.EJBLocalObjectInvocationHandler@72b0f2b2
Field Name == isOptionalLocalBusinessView
Field == false
答案 0 :(得分:5)
这通常意味着当对象周围有代理(并且代理基于接口)时,您通过其类引用对象,而不是通过其接口引用对象。
解决方案是通过其接口引用对象。我猜想EventsFacade
有一个Local
和/或Remote
接口。尝试使用它。如果它没有界面 - 制作一个,这是一个很好的做法。定义界面中的所有公共方法。
更新:看起来,这可能是您正在使用的嵌入式玻璃鱼的问题。由于您无法使用调试器进行调试,因此您可以采取以下措施来跟踪问题:使用java.lang.reflect.Proxy.getInvocationHandler(object)
。然后列出返回对象的所有字段。 (你现在必须放弃演员表并将其从上下文中简单地作为Object
)。类似的东西:
Object ic = Proxy.getInvocationHandler(facade);
Field[] fields = ic.getClass().getDeclaredFields();
for (Field field : fields) {
field.setAccessible(true);
System.out.println(field.getName() + "=" + field.get(ic);
}