英文:
Weblogic cannot inject @PersistenceContext in static field
问题
我对Weblogic并不是很熟悉，也许这是一个愚蠢的问题，但我不明白为什么如果持久化上下文将被注入到静态字段中，部署会失败。
@PersistenceContext(unitName = "name")
private static EntityManager em;
java.lang.IllegalArgumentException: 类 "class_name" 中的字段 "em" 被定义为使用注解 @PersistenceContext 的注入目标，但是 "em" 不能被声明为静态字段。
at weblogic.j2ee.dd.xml.validator.injectiontarget.BaseValidator.error(BaseValidator.java:132)
at weblogic.j2ee.dd.xml.validator.injectiontarget.BaseValidator.error(BaseValidator.java:149)
at weblogic.j2ee.dd.xml.validator.injectiontarget.J2EEValidator.checkModifier(J2EEValidator.java:28)
at weblogic.j2ee.dd.xml.validator.AbstractAnnotationValidator.checkField(AbstractAnnotationValidator.java:57)
at weblogic.j2ee.dd.xml.validator.AbstractAnnotationValidator.validate(AbstractAnnotationValidator.java:26)
at weblogic.j2ee.dd.xml.validator.AnnotationValidatorVisitor.visitInjectionTargetBean(AnnotationValidatorVisitor.java:48)
at weblogic.j2ee.dd.xml.validator.AnnotationValidatorVisitor.visit(AnnotationValidatorVisitor.java:25)
at weblogic.descriptor.internal.AbstractDescriptorBean.accept(AbstractDescriptorBean.java:1448)
at weblogic.descriptor.internal.AbstractDescriptorBean.accept(AbstractDescriptorBean.java:1452)
at weblogic.descriptor.internal.AbstractDescriptorBean.accept(AbstractDescriptorBean.java:1452)
at weblogic.descriptor.internal.AbstractDescriptorBean.accept(AbstractDescriptorBean.java:1452)
at weblogic.descriptor.internal.AbstractDescriptorBean.accept(AbstractDescriptorBean.java:1452)
at weblogic.j2ee.dd.xml.BaseJ2eeAnnotationProcessor.validate(BaseJ2eeAnnotationProcessor.java:205)
at weblogic.j2ee.dd.xml.BaseJ2eeAnnotationProcessor.validate(BaseJ2eeAnnotationProcessor.java:197)
at weblogic.ejb.container.metadata.EjbAnnotationProcessor.processAnnotations(EjbAnnotationProcessor.java:260)
at weblogic.ejb.container.metadata.EjbDescriptorReaderImpl.processAnnotations(EjbDescriptorReaderImpl.java:364)
at weblogic.ejb.container.deployer.EJBMetadataHandler.processAnnotations(EJBMetadataHandler.java:164)
at weblogic.ejb.container.deployer.EJBMetadataHandler.processAnnotations(EJBMetadataHandler.java:157)
at weblogic.ejb.container.deployer.EJBModule.processAnnotations(EJBModule.java:175)
at weblogic.ejb.container.deployer.EJBModule.prepare(EJBModule.java:370)
at weblogic.application.internal.ExtensibleModuleWrapper$PrepareStateChange.next(ExtensibleModuleWrapper.java:295)
at weblogic.application.internal.ExtensibleModuleWrapper$PrepareStateChange.next(ExtensibleModuleWrapper.java:285)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:45)
at weblogic.application.internal.ExtensibleModuleWrapper.prepare(ExtensibleModuleWrapper.java:109)
at weblogic.application.internal.flow.ModuleListenerInvoker.prepare(ModuleListenerInvoker.java:100)
at weblogic.application.internal.flow.ModuleStateDriver$1.next(ModuleStateDriver.java:192)
at weblogic.application.internal.flow.ModuleStateDriver$1.next(ModuleStateDriver.java:187)
at weblogic.application.utils.StateMachineDriver$ParallelChange.run(StateMachineDriver.java:83)
at weblogic.work.ContextWrap.run(ContextWrap.java:46)
at weblogic.work.SelfTuningWorkManagerImpl$WorkAdapterImpl.run(SelfTuningWorkManagerImpl.java:670)
at weblogic.invocation.ComponentInvocationContextManager._runAs(ComponentInvocationContextManager.java:352)
at weblogic.invocation.ComponentInvocationContextManager.runAs(ComponentInvocationContextManager.java:337)
at weblogic.work.LivePartitionUtility.doRunWorkUnderContext(LivePartitionUtility.java:57)
at weblogic.work.PartitionUtility.runWorkUnderContext(PartitionUtility.java:41)
at weblogic.work.SelfTuningWorkManagerImpl.runWorkUnderContext(SelfTuningWorkManagerImpl.java:644)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:415)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:355)
英文:
I'm not very skilled on Weblogic, and maybe is a stupid question, but I'm unable to understand why the deploy fail if the persistence context will be injected in a static field.
@PersistenceContext(unitName = "name")
private static EntityManager em;
java.lang.IllegalArgumentException: Field "em" in class "class_name" is defined as injection target with annotation @PersistenceContext, but "em" cannot be declared as static field.
at weblogic.j2ee.dd.xml.validator.injectiontarget.BaseValidator.error(BaseValidator.java:132)
at weblogic.j2ee.dd.xml.validator.injectiontarget.BaseValidator.error(BaseValidator.java:149)
at weblogic.j2ee.dd.xml.validator.injectiontarget.J2EEValidator.checkModifier(J2EEValidator.java:28)
at weblogic.j2ee.dd.xml.validator.AbstractAnnotationValidator.checkField(AbstractAnnotationValidator.java:57)
at weblogic.j2ee.dd.xml.validator.AbstractAnnotationValidator.validate(AbstractAnnotationValidator.java:26)
at weblogic.j2ee.dd.xml.validator.AnnotationValidatorVisitor.visitInjectionTargetBean(AnnotationValidatorVisitor.java:48)
at weblogic.j2ee.dd.xml.validator.AnnotationValidatorVisitor.visit(AnnotationValidatorVisitor.java:25)
at weblogic.descriptor.internal.AbstractDescriptorBean.accept(AbstractDescriptorBean.java:1448)
at weblogic.descriptor.internal.AbstractDescriptorBean.accept(AbstractDescriptorBean.java:1452)
at weblogic.descriptor.internal.AbstractDescriptorBean.accept(AbstractDescriptorBean.java:1452)
at weblogic.descriptor.internal.AbstractDescriptorBean.accept(AbstractDescriptorBean.java:1452)
at weblogic.descriptor.internal.AbstractDescriptorBean.accept(AbstractDescriptorBean.java:1452)
at weblogic.j2ee.dd.xml.BaseJ2eeAnnotationProcessor.validate(BaseJ2eeAnnotationProcessor.java:205)
at weblogic.j2ee.dd.xml.BaseJ2eeAnnotationProcessor.validate(BaseJ2eeAnnotationProcessor.java:197)
at weblogic.ejb.container.metadata.EjbAnnotationProcessor.processAnnotations(EjbAnnotationProcessor.java:260)
at weblogic.ejb.container.metadata.EjbDescriptorReaderImpl.processAnnotations(EjbDescriptorReaderImpl.java:364)
at weblogic.ejb.container.deployer.EJBMetadataHandler.processAnnotations(EJBMetadataHandler.java:164)
at weblogic.ejb.container.deployer.EJBMetadataHandler.processAnnotations(EJBMetadataHandler.java:157)
at weblogic.ejb.container.deployer.EJBModule.processAnnotations(EJBModule.java:175)
at weblogic.ejb.container.deployer.EJBModule.prepare(EJBModule.java:370)
at weblogic.application.internal.ExtensibleModuleWrapper$PrepareStateChange.next(ExtensibleModuleWrapper.java:295)
at weblogic.application.internal.ExtensibleModuleWrapper$PrepareStateChange.next(ExtensibleModuleWrapper.java:285)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:45)
at weblogic.application.internal.ExtensibleModuleWrapper.prepare(ExtensibleModuleWrapper.java:109)
at weblogic.application.internal.flow.ModuleListenerInvoker.prepare(ModuleListenerInvoker.java:100)
at weblogic.application.internal.flow.ModuleStateDriver$1.next(ModuleStateDriver.java:192)
at weblogic.application.internal.flow.ModuleStateDriver$1.next(ModuleStateDriver.java:187)
at weblogic.application.utils.StateMachineDriver$ParallelChange.run(StateMachineDriver.java:83)
at weblogic.work.ContextWrap.run(ContextWrap.java:46)
at weblogic.work.SelfTuningWorkManagerImpl$WorkAdapterImpl.run(SelfTuningWorkManagerImpl.java:670)
at weblogic.invocation.ComponentInvocationContextManager._runAs(ComponentInvocationContextManager.java:352)
at weblogic.invocation.ComponentInvocationContextManager.runAs(ComponentInvocationContextManager.java:337)
at weblogic.work.LivePartitionUtility.doRunWorkUnderContext(LivePartitionUtility.java:57)
at weblogic.work.PartitionUtility.runWorkUnderContext(PartitionUtility.java:41)
at weblogic.work.SelfTuningWorkManagerImpl.runWorkUnderContext(SelfTuningWorkManagerImpl.java:644)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:415)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:355)
答案1
得分: 1
@Vincenzo和我是同事，所以我们要告诉您，他通过配置Weblogic在生产模式下解决了这个问题。
原因仍然不清楚，但暂时并不重要，因为...它起作用了！
英文:
@Vincenzo and I are colleagues, so we would inform you that he solved the issue by configuring Weblogic in production mode.
The reason is still obscure, but for the moment it doesn't matter, because... it works!
答案2
得分: 0
不应使用 static 修饰符，应使用非静态变量
英文:
Should not static modifier, use non-static variable
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