Jakarta ee 如果ejbbean方法是包私有的,为什么没有检测到它?
这个让我很困惑。我基于运行在Wildfly 10.1上的JavaEE7创建了一个最小的JAX-RS应用程序Jakarta ee 如果ejbbean方法是包私有的,为什么没有检测到它?,jakarta-ee,methods,ejb,package-private,Jakarta Ee,Methods,Ejb,Package Private,这个让我很困惑。我基于运行在Wildfly 10.1上的JavaEE7创建了一个最小的JAX-RS应用程序 @ApplicationPath("") public class JAXRSConfiguration extends Application { @Override public Set<Class<?>> getClasses() { return new HashSet<Class<?>>(Array
@ApplicationPath("")
public class JAXRSConfiguration extends Application {
@Override
public Set<Class<?>> getClasses() {
return new HashSet<Class<?>>(Arrays.asList(Resource.class));
}
}
这是bean:
@Stateless
public class Manager {
@PostConstruct
private void init() {
System.out.println("POST CONSTRUCT ");
}
void call() {
System.out.println("called ");
}
}
使用浏览器执行GET会导致以下错误:
org.jboss.resteasy.spi.UnhandledException: org.jboss.weld.exceptions.WeldException: Class org.jboss.weld.util.reflection.Reflections can not access a member of class com.a.b.Manager with modifiers ""
可以发布完整堆栈跟踪,但所有由消息引起的跟踪都是相同的
我搜索了这个错误,当注入的bean不是公共的,但我的是公共的时,就会发生这个错误。我决定尝试移除公众,看看他们会抱怨什么,然后。。。它起作用了。bean被注入,它可能进行的任何注入都被注入,调用post-construct方法并打印所有打印
这与我的观点完全相反。这是怎么回事
更新
Oliv37促使我做了一些测试,以下是结果:
- 如果
是call
,则它仅在package
是管理器
时工作package
- 如果
是call
,则不管它如何工作public
- 如果
是call
,则仅当final
是Manager
时才会调用package
方法@PostConstruct
org.jboss.resteasy.spi.UnhandledException: org.jboss.weld.exceptions.WeldException: Class org.jboss.weld.util.reflection.Reflections can not access a member of class com.a.b.Manager with modifiers ""
at org.jboss.resteasy.core.ExceptionHandler.handleApplicationException(ExceptionHandler.java:77)
at org.jboss.resteasy.core.ExceptionHandler.handleException(ExceptionHandler.java:220)
at org.jboss.resteasy.core.SynchronousDispatcher.writeException(SynchronousDispatcher.java:175)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:418)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:209)
at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:221)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85)
at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:292)
at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:138)
at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135)
at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:272)
at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:104)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)
at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:805)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.jboss.weld.exceptions.WeldException: Class org.jboss.weld.util.reflection.Reflections can not access a member of class com.a.b.Manager with modifiers ""
at org.jboss.weld.util.reflection.Reflections.invokeAndUnwrap(Reflections.java:437)
at org.jboss.weld.bean.proxy.EnterpriseBeanProxyMethodHandler.invoke(EnterpriseBeanProxyMethodHandler.java:128)
at org.jboss.weld.bean.proxy.EnterpriseTargetBeanInstance.invoke(EnterpriseTargetBeanInstance.java:56)
at org.jboss.weld.bean.proxy.InjectionPointPropagatingEnterpriseTargetBeanInstance.invoke(InjectionPointPropagatingEnterpriseTargetBeanInstance.java:67)
at org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:100)
at com.a.b.Manager$Proxy$_$$_Weld$EnterpriseProxy$.call(Unknown Source)
at com.airhacks.boundary.Resource.go(Resource.java:16)
at com.airhacks.boundary.Resource$Proxy$_$$_WeldClientProxy.go(Unknown Source)
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:498)
at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:139)
at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:295)
at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:249)
at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:236)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:402)
... 42 more
Caused by: java.lang.IllegalAccessException: Class org.jboss.weld.util.reflection.Reflections can not access a member of class com.a.b.Manager with modifiers ""
at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:102)
at java.lang.reflect.AccessibleObject.slowCheckMemberAccess(AccessibleObject.java:296)
at java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:288)
at java.lang.reflect.Method.invoke(Method.java:491)
at org.jboss.weld.util.reflection.Reflections.invokeAndUnwrap(Reflections.java:433)
... 58 more
简短的回答是-公开您的
调用
方法
时间越长,问题是调用
方法受包保护。根据EJB规范,会话Bean的无接口视图一章(引用3.1 EJB规范):
只有bean类(以及任何超类)的公共方法可以通过no-interface视图调用。试图通过无接口视图引用使用任何其他访问修饰符调用方法必须导致javax.ejb.EJBException
通过使用非公共修饰符,您违反了规范,并且in不抛出EJBException
这一事实可以在WFLY中的EJB impl中忽略,也可以是一个特性。不管怎样,你都处在灰色地带
现在对于Weld,它正试图使用反射来访问该方法并调用它。这就是问题的症结所在,因为如果不绕过它,您就无法访问其他方法(使用method.setAccessible()
)
至于您关于final
方法和@PostConstruct
未被调用的附带问题,您正在违反另一个EJB规则。这一个位于4.9.8会话Bean的无接口视图中,其中一个破折号表示:
只有bean类的私有方法和除java.lang.Object
之外的任何超类可以声明为final
我不能解释为什么没有例外,但这是你头痛的原因。至于这个规则存在的原因——正如我在评论中所说的,Weld需要创建代理,如果无法覆盖该方法,则无法在@PostConstruct
调用中编织并拦截它
希望这能回答您的问题。关于该类不公开且有效的一条评论:正如您链接问题中的一条评论所说:它在您所选容器的环境中有效,但不能保证在每个EE容器中都有效,因为规范没有定义它。@dunni OK,但是,如果这是规范,为什么它不适用于public呢?我明白,如果我做了规范中没有的事情,它可能会工作,也可能不会工作,但是如果我做了规范中的事情,它们一定会工作……嗯,你是否尝试在管理器
类中为方法调用
添加了公共
修饰符。如果该方法是公共的,那么不管类的可见性如何,它都可以工作。在规范中没有看到关于方法可见性规则的Aynthing。方法的默认可见性是包
,同一个包中的资源
和管理器
类也是这样吗?同样是为了检查此行为而创建的-结果表明它会引发正确的异常(调用非公共EJB方法-请参阅我在该期中的评论)但是Weld速度更快,并且在IllegalAccess
reflections问题上失败-这可能(应该)在焊接方面需要改进。最终修改器导致不调用后期构造呢?Uf,老实说,与我们在这里整理的问题相比,这是完全不同的问题。我想焊接创建bean的代理对象会有问题-但根据CDI规范,最终方法不起作用。但实际上,这是一个问题这个问题应该有一个单独的“线程”,您可以在其中指定失败的具体部署场景。在这里,它与所有选项纠缠在一起。我也会研究这个问题,稍后可以在这里报告,但正如我所说的,这将是不同的问题(好吧,或者误用,还不知道).@Mark Expanded answer,您的第二个问题是因为您违反了“4.9.8会话Bean的无接口视图”下的另一个EJB规范规则-您不能在那里拥有最终方法,除非它是私有的(在我的回答中完整引用)。
org.jboss.resteasy.spi.UnhandledException: org.jboss.weld.exceptions.WeldException: Class org.jboss.weld.util.reflection.Reflections can not access a member of class com.a.b.Manager with modifiers ""
at org.jboss.resteasy.core.ExceptionHandler.handleApplicationException(ExceptionHandler.java:77)
at org.jboss.resteasy.core.ExceptionHandler.handleException(ExceptionHandler.java:220)
at org.jboss.resteasy.core.SynchronousDispatcher.writeException(SynchronousDispatcher.java:175)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:418)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:209)
at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:221)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85)
at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:292)
at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:138)
at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135)
at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.api.LegacyThreadSetupActionWrapper$1.call(LegacyThreadSetupActionWrapper.java:44)
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:272)
at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:104)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)
at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:805)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.jboss.weld.exceptions.WeldException: Class org.jboss.weld.util.reflection.Reflections can not access a member of class com.a.b.Manager with modifiers ""
at org.jboss.weld.util.reflection.Reflections.invokeAndUnwrap(Reflections.java:437)
at org.jboss.weld.bean.proxy.EnterpriseBeanProxyMethodHandler.invoke(EnterpriseBeanProxyMethodHandler.java:128)
at org.jboss.weld.bean.proxy.EnterpriseTargetBeanInstance.invoke(EnterpriseTargetBeanInstance.java:56)
at org.jboss.weld.bean.proxy.InjectionPointPropagatingEnterpriseTargetBeanInstance.invoke(InjectionPointPropagatingEnterpriseTargetBeanInstance.java:67)
at org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:100)
at com.a.b.Manager$Proxy$_$$_Weld$EnterpriseProxy$.call(Unknown Source)
at com.airhacks.boundary.Resource.go(Resource.java:16)
at com.airhacks.boundary.Resource$Proxy$_$$_WeldClientProxy.go(Unknown Source)
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:498)
at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:139)
at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:295)
at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:249)
at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:236)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:402)
... 42 more
Caused by: java.lang.IllegalAccessException: Class org.jboss.weld.util.reflection.Reflections can not access a member of class com.a.b.Manager with modifiers ""
at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:102)
at java.lang.reflect.AccessibleObject.slowCheckMemberAccess(AccessibleObject.java:296)
at java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:288)
at java.lang.reflect.Method.invoke(Method.java:491)
at org.jboss.weld.util.reflection.Reflections.invokeAndUnwrap(Reflections.java:433)
... 58 more