java - 无法使用 eager=true 将依赖项注入(inject)到 JSF bean(Websphere、Myfaces)

Question

我有一个简单的 Eager 应用程序范围的 JSF bean:

@ManagedBean(eager = true, name = "SetupBean")
@ApplicationScoped
public class SetupBean {
    @ManagedProperty(value = "#{myBean}")
    private MyBean myBean;
    public void setMyBean(final MyBean myBean) {
        this.myBean = myBean;
    }    
    @PostConstruct
    public void postConstruct() {
        System.err.println("I'm here!");
    }
}

虽然 @ManagedProperty 行被注释掉(没有依赖注入(inject))，但一切都工作“正常”(异常(exception)的是，我不能在该 bean 中做任何有用的事情)。

但是，取消注释后我收到错误:

java.lang.UnsupportedOperationException: This method is not supported during startup

不幸的是，我找不到任何有用的信息启动过程中不支持什么方法。我只知道依赖注入(inject)有问题。 MyBean 没什么特别的，它是应用程序范围的，它没有依赖性，它只有一些私有(private)属性，需要为每个应用程序配置(bean 位于共享库中)。

这是完整的堆栈跟踪:

java.lang.UnsupportedOperationException: This method is not supported during startup at org.apache.myfaces.context.servlet.StartupServletExternalContextImpl.getRequestMap(StartupServletExternalContextImpl.java:149) at org.apache.myfaces.config.ManagedBeanBuilder.getScope(ManagedBeanBuilder.java:540) at org.apache.myfaces.config.ManagedBeanBuilder.getNarrowestScope(ManagedBeanBuilder.java:462) at org.apache.myfaces.config.ManagedBeanBuilder.isInValidScope(ManagedBeanBuilder.java:433) at org.apache.myfaces.config.ManagedBeanBuilder.initializeProperties(ManagedBeanBuilder.java:322) at org.apache.myfaces.config.ManagedBeanBuilder.buildManagedBean(ManagedBeanBuilder.java:169) at org.apache.myfaces.webapp.AbstractFacesInitializer._createEagerBeans(AbstractFacesInitializer.java:235) at org.apache.myfaces.webapp.AbstractFacesInitializer.initFaces(AbstractFacesInitializer.java:152) at org.apache.myfaces.webapp.StartupServletContextListener.contextInitialized(StartupServletContextListener.java:111) at com.ibm.ws.webcontainer.webapp.WebApp.notifyServletContextCreated(WebApp.java:1678) at com.ibm.ws.webcontainer.webapp.WebAppImpl.initialize(WebAppImpl.java:414) at com.ibm.ws.webcontainer.webapp.WebGroupImpl.addWebApplication(WebGroupImpl.java:88) at com.ibm.ws.webcontainer.VirtualHostImpl.addWebApplication(VirtualHostImpl.java:169) at com.ibm.ws.webcontainer.WSWebContainer.addWebApp(WSWebContainer.java:749) at com.ibm.ws.webcontainer.WSWebContainer.addWebApplication(WSWebContainer.java:634) at com.ibm.ws.webcontainer.component.WebContainerImpl.install(WebContainerImpl.java:426) at com.ibm.ws.webcontainer.component.WebContainerImpl.start(WebContainerImpl.java:718) at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:1173) at com.ibm.ws.runtime.component.DeployedApplicationImpl.fireDeployedObjectStart(DeployedApplicationImpl.java:1370) at com.ibm.ws.runtime.component.DeployedModuleImpl.start(DeployedModuleImpl.java:639) at com.ibm.ws.runtime.component.DeployedApplicationImpl.start(DeployedApplicationImpl.java:968) at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:772) at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplicationDynamically(ApplicationMgrImpl.java:1367) at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:2172) at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.start(CompositionUnitMgrImpl.java:445) at com.ibm.ws.runtime.component.CompositionUnitImpl.start(CompositionUnitImpl.java:123) at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.start(CompositionUnitMgrImpl.java:388) at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.access$500(CompositionUnitMgrImpl.java:116) at com.ibm.ws.runtime.component.CompositionUnitMgrImpl$1.run(CompositionUnitMgrImpl.java:663) at com.ibm.ws.security.auth.ContextManagerImpl.runAs(ContextManagerImpl.java:5459) at com.ibm.ws.security.auth.ContextManagerImpl.runAsSystem(ContextManagerImpl.java:5585) at com.ibm.ws.security.core.SecurityContext.runAsSystem(SecurityContext.java:255) at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.startCompositionUnit(CompositionUnitMgrImpl.java:677) at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.startCompositionUnit(CompositionUnitMgrImpl.java:621) at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:1259) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:60) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37) at java.lang.reflect.Method.invoke(Method.java:611) at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:49) at sun.reflect.GeneratedMethodAccessor66.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37) at java.lang.reflect.Method.invoke(Method.java:611) at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:256) at javax.management.modelmbean.RequiredModelMBean$4.run(RequiredModelMBean.java:1148) at java.security.AccessController.doPrivileged(AccessController.java:252) at com.ibm.oti.security.CheckedAccessControlContext.securityCheck(CheckedAccessControlContext.java:30) at sun.misc.JavaSecurityAccessWrapper.doIntersectionPrivilege(JavaSecurityAccessWrapper.java:41) at javax.management.modelmbean.RequiredModelMBean.invokeMethod(RequiredModelMBean.java:1142) at javax.management.modelmbean.RequiredModelMBean.invoke(RequiredModelMBean.java:995) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:848) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:774) at com.ibm.ws.management.AdminServiceImpl$1.run(AdminServiceImpl.java:1335) at com.ibm.ws.security.util.AccessController.doPrivileged(AccessController.java:118) at com.ibm.ws.management.AdminServiceImpl.invoke(AdminServiceImpl.java:1228) at com.ibm.ws.management.application.sync.StartDeploymentTask.startDeployment(StartDeploymentTask.java:247) at com.ibm.ws.management.application.sync.StartDeploymentTask.fullAppUpdate(StartDeploymentTask.java:119) at com.ibm.ws.management.application.sync.StartDeploymentTask.performTask(StartDeploymentTask.java:107) at com.ibm.ws.management.application.sync.AppBinaryProcessor$ExpandApp.expand(AppBinaryProcessor.java:1709) at com.ibm.ws.management.application.sync.AppBinaryProcessor.postProcessSynchronousExt(AppBinaryProcessor.java:749) at com.ibm.ws.management.bla.sync.BLABinaryProcessor.postProcess(BLABinaryProcessor.java:590) at com.ibm.ws.management.bla.sync.BLABinaryProcessor.onChangeCompletion(BLABinaryProcessor.java:467) at com.ibm.ws.management.bla.sync.BinaryProcessorWrapper.onChangeCompletion(BinaryProcessorWrapper.java:109) at com.ibm.ws.management.repository.FileRepository.postNotify(FileRepository.java:1924) at com.ibm.ws.management.repository.FileRepository.update(FileRepository.java:1433) at com.ibm.ws.management.repository.client.LocalConfigRepositoryClient.update(LocalConfigRepositoryClient.java:189) at com.ibm.ws.sm.workspace.impl.WorkSpaceMasterRepositoryAdapter.update(WorkSpaceMasterRepositoryAdapter.java:665) at com.ibm.ws.sm.workspace.impl.RepositoryContextImpl.update(RepositoryContextImpl.java:1998) at com.ibm.ws.sm.workspace.impl.RepositoryContextImpl.synch(RepositoryContextImpl.java:1946) at com.ibm.ws.sm.workspace.impl.WorkSpaceImpl.synch(WorkSpaceImpl.java:549) at com.ibm.ws.management.configservice.ConfigServiceImpl.save(ConfigServiceImpl.java:719) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:60) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37) at java.lang.reflect.Method.invoke(Method.java:611) at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:49) at sun.reflect.GeneratedMethodAccessor66.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37) at java.lang.reflect.Method.invoke(Method.java:611) at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:256) at javax.management.modelmbean.RequiredModelMBean$4.run(RequiredModelMBean.java:1148) at java.security.AccessController.doPrivileged(AccessController.java:252) at com.ibm.oti.security.CheckedAccessControlContext.securityCheck(CheckedAccessControlContext.java:30) at sun.misc.JavaSecurityAccessWrapper.doIntersectionPrivilege(JavaSecurityAccessWrapper.java:41) at javax.management.modelmbean.RequiredModelMBean.invokeMethod(RequiredModelMBean.java:1142) at javax.management.modelmbean.RequiredModelMBean.invoke(RequiredModelMBean.java:995) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:848) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:774) at com.ibm.ws.management.AdminServiceImpl$1.run(AdminServiceImpl.java:1335) at com.ibm.ws.security.util.AccessController.doPrivileged(AccessController.java:118) at com.ibm.ws.management.AdminServiceImpl.invoke(AdminServiceImpl.java:1228) at com.ibm.ws.management.remote.AdminServiceForwarder.invoke(AdminServiceForwarder.java:346) at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1465) at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:85) at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1306) at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1398) at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:829) at javax.management.remote.rmi._RMIConnectionImpl_Tie.invoke(_RMIConnectionImpl_Tie.java:751) at javax.management.remote.rmi._RMIConnectionImpl_Tie._invoke(_RMIConnectionImpl_Tie.java:158) at com.ibm.CORBA.iiop.ServerDelegate.dispatchInvokeHandler(ServerDelegate.java:669) at com.ibm.CORBA.iiop.ServerDelegate.dispatch(ServerDelegate.java:523) at com.ibm.rmi.iiop.ORB.process(ORB.java:523) at com.ibm.CORBA.iiop.ORB.process(ORB.java:1575) at com.ibm.rmi.iiop.Connection.doRequestWork(Connection.java:3039) at com.ibm.rmi.iiop.Connection.doWork(Connection.java:2922) at com.ibm.rmi.iiop.WorkUnitImpl.doWork(WorkUnitImpl.java:64) at com.ibm.ejs.oa.pool.PooledThread.run(ThreadPool.java:118) at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1815)

运行配置:WebSphere 8.5 和 MyFaces 2.0.2(IBM 定制版本)。

这个错误是什么意思？为了使依赖注入(inject)工作需要做什么？

Answer 1

信息，http://docs.oracle.com/javaee/6/api/javax/faces/bean/ManagedBean.html

渴望申请。强制它首先加载。删除 eager，似乎其他人也有类似的错误 Eager ApplicationScoped managed beans constructed multiple times

某些注释存在重复的包。你检查一下。他们是对的