这是我在 stackoverflow 上的第一篇文章
我想在 jsf 2 的 ApplicationScope bean 中创建 EntityManagerFactory。这是我的 bean
@ApplicationScoped
@ManagedBean(eager = true)
public class ApplicationContext implements Serializable{
/**
*
*/
private static final long serialVersionUID = 1L;
private EntityManagerFactory entityManagerFactory = null;
private EntityManager entityManager = null;
public ApplicationContext(){
}
public EntityManagerFactory getEntityManagerFactory() {
return entityManagerFactory;
}
public void setEntityManagerFactory(EntityManagerFactory entityManagerFactory) {
this.entityManagerFactory = entityManagerFactory;
}
public EntityManager getEntityManager() {
return entityManager;
}
public void setEntityManager(EntityManager entityManager) {
this.entityManager = entityManager;
}
@PostConstruct
public void applicationInitialized(){
System.out.println("application is being initialized");
this.entityManagerFactory = Persistence.createEntityManagerFactory("PersonalProject");
this.entityManager = this.entityManagerFactory.createEntityManager();
}
@PreDestroy
public void applicationDestroyed(){
System.out.println("application being destroyed");
}
}
为此，我得到了一个巨大的异常堆栈跟踪。
com.sun.faces.mgbean.ManagedBeanCreationException: An error occurred performing resource injection on managed bean applicationContext
at com.sun.faces.mgbean.BeanBuilder.invokePostConstruct(BeanBuilder.java:229)
at com.sun.faces.mgbean.BeanBuilder.build(BeanBuilder.java:105)
at com.sun.faces.mgbean.BeanManager.createAndPush(BeanManager.java:409)
at com.sun.faces.mgbean.BeanManager.create(BeanManager.java:269)
at com.sun.faces.mgbean.BeanManager.create(BeanManager.java:256)
at com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.java:255)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4779)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5273)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1566)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1556)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: com.sun.faces.spi.InjectionProviderException
at com.sun.faces.vendor.WebContainerInjectionProvider.invokeAnnotatedMethod(WebContainerInjectionProvider.java:119)
at com.sun.faces.vendor.WebContainerInjectionProvider.invokePostConstruct(WebContainerInjectionProvider.java:99)
at com.sun.faces.mgbean.BeanBuilder.invokePostConstruct(BeanBuilder.java:223)
... 15 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.sun.faces.vendor.WebContainerInjectionProvider.invokeAnnotatedMethod(WebContainerInjectionProvider.java:117)
... 17 more
Caused by: Exception [EclipseLink-30005] (Eclipse Persistence Services - 2.1.3.v20110304-r9073): org.eclipse.persistence.exceptions.PersistenceUnitLoadingException
Exception Description: An exception was thrown while searching for persistence archives with ClassLoader: WebappClassLoader
context: /PersonalProject
delegate: false
repositories:
/WEB-INF/classes/
----------> Parent Classloader:
org.apache.catalina.loader.StandardClassLoader@6d4c1103
Internal Exception: javax.persistence.PersistenceException: Exception [EclipseLink-28018] (Eclipse Persistence Services - 2.1.3.v20110304-r9073): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: Predeployment of PersistenceUnit [PersonalProject] failed.
Internal Exception: Exception [EclipseLink-7155] (Eclipse Persistence Services - 2.1.3.v20110304-r9073): org.eclipse.persistence.exceptions.ValidationException
Exception Description: The type [class java.lang.Object] for the attribute [content] on the entity class [class com.justme.model.entities.Post] is not a valid type for a serialized mapping. The attribute type must implement the Serializable interface.
at org.eclipse.persistence.exceptions.PersistenceUnitLoadingException.exceptionSearchingForPersistenceResources(PersistenceUnitLoadingException.java:126)
at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactory(PersistenceProvider.java:136)
at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactory(PersistenceProvider.java:65)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:60)
at com.justme.web.gui.ApplicationContext.applicationInitialized(ApplicationContext.java:49)
... 22 more
Caused by: javax.persistence.PersistenceException: Exception [EclipseLink-28018] (Eclipse Persistence Services - 2.1.3.v20110304-r9073): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: Predeployment of PersistenceUnit [PersonalProject] failed.
Internal Exception: Exception [EclipseLink-7155] (Eclipse Persistence Services - 2.1.3.v20110304-r9073): org.eclipse.persistence.exceptions.ValidationException
Exception Description: The type [class java.lang.Object] for the attribute [content] on the entity class [class com.justme.model.entities.Post] is not a valid type for a serialized mapping. The attribute type must implement the Serializable interface.
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:1014)
at org.eclipse.persistence.internal.jpa.deployment.JPAInitializer.callPredeploy(JPAInitializer.java:88)
at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactory(PersistenceProvider.java:127)
... 26 more
Caused by: Exception [EclipseLink-28018] (Eclipse Persistence Services - 2.1.3.v20110304-r9073): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: Predeployment of PersistenceUnit [PersonalProject] failed.
Internal Exception: Exception [EclipseLink-7155] (Eclipse Persistence Services - 2.1.3.v20110304-r9073): org.eclipse.persistence.exceptions.ValidationException
Exception Description: The type [class java.lang.Object] for the attribute [content] on the entity class [class com.justme.model.entities.Post] is not a valid type for a serialized mapping. The attribute type must implement the Serializable interface.
at org.eclipse.persistence.exceptions.EntityManagerSetupException.predeployFailed(EntityManagerSetupException.java:210)
... 29 more
Caused by: Exception [EclipseLink-7155] (Eclipse Persistence Services - 2.1.3.v20110304-r9073): org.eclipse.persistence.exceptions.ValidationException
Exception Description: The type [class java.lang.Object] for the attribute [content] on the entity class [class com.justme.model.entities.Post] is not a valid type for a serialized mapping. The attribute type must implement the Serializable interface.
at org.eclipse.persistence.exceptions.ValidationException.invalidTypeForSerializedAttribute(ValidationException.java:1112)
at org.eclipse.persistence.internal.jpa.metadata.converters.SerializedMetadata.process(SerializedMetadata.java:86)
at org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.MappingAccessor.processSerialized(MappingAccessor.java:1641)
at org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.MappingAccessor.processJPAConverters(MappingAccessor.java:1433)
at org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.MappingAccessor.processMappingConverter(MappingAccessor.java:1495)
at org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.MappingAccessor.processMappingValueConverter(MappingAccessor.java:1513)
at org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.BasicAccessor.process(BasicAccessor.java:367)
at org.eclipse.persistence.internal.jpa.metadata.MetadataDescriptor.processAccessors(MetadataDescriptor.java:1365)
at org.eclipse.persistence.internal.jpa.metadata.accessors.classes.ClassAccessor.processAccessors(ClassAccessor.java:963)
at org.eclipse.persistence.internal.jpa.metadata.accessors.classes.EntityAccessor.processAccessors(EntityAccessor.java:876)
at org.eclipse.persistence.internal.jpa.metadata.accessors.classes.EntityAccessor.process(EntityAccessor.java:691)
at org.eclipse.persistence.internal.jpa.metadata.MetadataProject.processStage2(MetadataProject.java:1531)
at org.eclipse.persistence.internal.jpa.metadata.MetadataProcessor.processORMMetadata(MetadataProcessor.java:474)
at org.eclipse.persistence.internal.jpa.deployment.PersistenceUnitProcessor.processORMetadata(PersistenceUnitProcessor.java:441)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:968)
... 28 more
Mar 17, 2013 11:40:24 AM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Exception sending context initialized event to listener instance of class com.sun.faces.config.ConfigureListener
java.lang.RuntimeException: com.sun.faces.mgbean.ManagedBeanCreationException: An error occurred performing resource injection on managed bean applicationContext
at com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.java:292)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4779)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5273)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1566)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1556)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: com.sun.faces.mgbean.ManagedBeanCreationException: An error occurred performing resource injection on managed bean applicationContext
at com.sun.faces.mgbean.BeanBuilder.invokePostConstruct(BeanBuilder.java:229)
at com.sun.faces.mgbean.BeanBuilder.build(BeanBuilder.java:105)
at com.sun.faces.mgbean.BeanManager.createAndPush(BeanManager.java:409)
at com.sun.faces.mgbean.BeanManager.create(BeanManager.java:269)
at com.sun.faces.mgbean.BeanManager.create(BeanManager.java:256)
at com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.java:255)
... 10 more
Caused by: com.sun.faces.spi.InjectionProviderException
at com.sun.faces.vendor.WebContainerInjectionProvider.invokeAnnotatedMethod(WebContainerInjectionProvider.java:119)
at com.sun.faces.vendor.WebContainerInjectionProvider.invokePostConstruct(WebContainerInjectionProvider.java:99)
at com.sun.faces.mgbean.BeanBuilder.invokePostConstruct(BeanBuilder.java:223)
... 15 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.sun.faces.vendor.WebContainerInjectionProvider.invokeAnnotatedMethod(WebContainerInjectionProvider.java:117)
... 17 more
Caused by: Exception [EclipseLink-30005] (Eclipse Persistence Services - 2.1.3.v20110304-r9073): org.eclipse.persistence.exceptions.PersistenceUnitLoadingException
Exception Description: An exception was thrown while searching for persistence archives with ClassLoader: WebappClassLoader
context: /PersonalProject
delegate: false
repositories:
/WEB-INF/classes/
----------> Parent Classloader:
org.apache.catalina.loader.StandardClassLoader@6d4c1103
Internal Exception: javax.persistence.PersistenceException: Exception [EclipseLink-28018] (Eclipse Persistence Services - 2.1.3.v20110304-r9073): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: Predeployment of PersistenceUnit [PersonalProject] failed.
Internal Exception: Exception [EclipseLink-7155] (Eclipse Persistence Services - 2.1.3.v20110304-r9073): org.eclipse.persistence.exceptions.ValidationException
Exception Description: The type [class java.lang.Object] for the attribute [content] on the entity class [class com.justme.model.entities.Post] is not a valid type for a serialized mapping. The attribute type must implement the Serializable interface.
at org.eclipse.persistence.exceptions.PersistenceUnitLoadingException.exceptionSearchingForPersistenceResources(PersistenceUnitLoadingException.java:126)
at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactory(PersistenceProvider.java:136)
at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactory(PersistenceProvider.java:65)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:60)
at com.justme.web.gui.ApplicationContext.applicationInitialized(ApplicationContext.java:49)
... 22 more
Caused by: javax.persistence.PersistenceException: Exception [EclipseLink-28018] (Eclipse Persistence Services - 2.1.3.v20110304-r9073): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: Predeployment of PersistenceUnit [PersonalProject] failed.
Internal Exception: Exception [EclipseLink-7155] (Eclipse Persistence Services - 2.1.3.v20110304-r9073): org.eclipse.persistence.exceptions.ValidationException
Exception Description: The type [class java.lang.Object] for the attribute [content] on the entity class [class com.justme.model.entities.Post] is not a valid type for a serialized mapping. The attribute type must implement the Serializable interface.
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:1014)
at org.eclipse.persistence.internal.jpa.deployment.JPAInitializer.callPredeploy(JPAInitializer.java:88)
at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactory(PersistenceProvider.java:127)
... 26 more
Caused by: Exception [EclipseLink-28018] (Eclipse Persistence Services - 2.1.3.v20110304-r9073): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: Predeployment of PersistenceUnit [PersonalProject] failed.
Internal Exception: Exception [EclipseLink-7155] (Eclipse Persistence Services - 2.1.3.v20110304-r9073): org.eclipse.persistence.exceptions.ValidationException
Exception Description: The type [class java.lang.Object] for the attribute [content] on the entity class [class com.justme.model.entities.Post] is not a valid type for a serialized mapping. The attribute type must implement the Serializable interface.
at org.eclipse.persistence.exceptions.EntityManagerSetupException.predeployFailed(EntityManagerSetupException.java:210)
... 29 more
Caused by: Exception [EclipseLink-7155] (Eclipse Persistence Services - 2.1.3.v20110304-r9073): org.eclipse.persistence.exceptions.ValidationException
Exception Description: The type [class java.lang.Object] for the attribute [content] on the entity class [class com.justme.model.entities.Post] is not a valid type for a serialized mapping. The attribute type must implement the Serializable interface.
at org.eclipse.persistence.exceptions.ValidationException.invalidTypeForSerializedAttribute(ValidationException.java:1112)
at org.eclipse.persistence.internal.jpa.metadata.converters.SerializedMetadata.process(SerializedMetadata.java:86)
at org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.MappingAccessor.processSerialized(MappingAccessor.java:1641)
at org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.MappingAccessor.processJPAConverters(MappingAccessor.java:1433)
at org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.MappingAccessor.processMappingConverter(MappingAccessor.java:1495)
at org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.MappingAccessor.processMappingValueConverter(MappingAccessor.java:1513)
at org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.BasicAccessor.process(BasicAccessor.java:367)
at org.eclipse.persistence.internal.jpa.metadata.MetadataDescriptor.processAccessors(MetadataDescriptor.java:1365)
at org.eclipse.persistence.internal.jpa.metadata.accessors.classes.ClassAccessor.processAccessors(ClassAccessor.java:963)
at org.eclipse.persistence.internal.jpa.metadata.accessors.classes.EntityAccessor.processAccessors(EntityAccessor.java:876)
at org.eclipse.persistence.internal.jpa.metadata.accessors.classes.EntityAccessor.process(EntityAccessor.java:691)
at org.eclipse.persistence.internal.jpa.metadata.MetadataProject.processStage2(MetadataProject.java:1531)
at org.eclipse.persistence.internal.jpa.metadata.MetadataProcessor.processORMMetadata(MetadataProcessor.java:474)
at org.eclipse.persistence.internal.jpa.deployment.PersistenceUnitProcessor.processORMetadata(PersistenceUnitProcessor.java:441)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:968)
... 28 more
根本原因是因为 Post 类没有实现可序列化。但它已经实现如下。
public class Post implements Serializable {}
我只在 ApplicationScoped ManagedBean 中遇到这个问题。如果我尝试使用 ServletContextListener 创建 EntityManagerFactory，那么它创建得很好。
可能是什么问题？我是否缺少有关 ApplicationScoped bean 的一些知识？