初始化JPA的EntityManagerFactory在applicationscope豆在JSF 2

這是我的計算器上的第一篇文章初始化JPA的EntityManagerFactory在applicationscope豆在JSF 2

我想在ApplicationScope豆在JSF中創建的EntityManagerFactory 2. 這裏是我的豆

@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"); 

} 

}

我得到這是一個巨大的異常堆棧跟蹤。

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: 
[email protected] 

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: 
[email protected] 

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

根本原因說這是因爲類Post沒有實現可序列化。但它已經實現它如下。

public class Post implements Serializable {}

我只在ApplicationScoped ManagedBean中出現此問題。如果我嘗試使用ServletContextListener創建EntityManagerFactory，那麼它創建得很好。

可能是什麼問題？我是否缺少有關ApplicationScoped bean的一些知識？

來源

2013-03-17 Prasad Kharkar

看起來好像類崗位有一個Object類型的名爲內容字段：

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.

JPA不知道如何對象轉換爲列類型在數據庫中。

還有一件事。您正在使用EntityManager作爲ApplicationContext中的字段。 EntityManager類不是線程保存的，因此在應用程序範圍的類中使用它會導致很多問題。

你最好刪除EntityManager的領域，除去setEntityManager方法和重寫getEntityManager

public EntityManager getEntityManager() { 
    return entityManagerFactory.getEntityManager(); 
}

的EntityManagerFactory是線程保存。

來源

2013-03-21 20:05:51

感謝entityManager的事情，我沒有意識到它:) – 2013-04-04 00:35:40

初始化JPA的EntityManagerFactory在applicationscope豆在JSF 2

回答

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