Question

我正在尝试使用eclipselink（2.4.0）和spring-data-jpa（1.1.0.RELEASE）的组合来实现解决方案。但是，每次部署解决方案（Tomcat 7）时，都会出现以下异常：

Caused by: java.lang.IllegalArgumentException: No [ManagedType] was found for 
the key class [com.acme.domain.entities.User] in the Metamodel - please 
verify that the [Managed] class was referenced in persistence.xml using a 
specific <class>com.acme.domain.entities.User</class> property or a global 
<exclude-unlisted-classes>false</exclude-unlisted-classes> element.

当存储库自动装配发生时（下面的代码示例）：

服务类

@Component
public class UserDataService {

    @Autowired
    private UserRepository userRepository;

    ...
}

实体类

package com.acme.domain.entities;

...

@Entity
@Table(name = "users")
public class User implements Serializable {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "user_id")
    private Integer id;

    ...

}

的persistence.xml

<persistence-unit name="default" transaction-type="RESOURCE_LOCAL">
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>    
    <class>com.acme.domain.entities.User</class>

    ...
</persistence-unit>

这可能是由于spring和eclipselink之间存在一些冲突吗？

更新

...堆栈跟踪

[#|2012-07-31 16:25:02,317|ERROR|pool-2-thread-40|org.springframework.web.context.ContextLoader|Context initialization failed|#]
    org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userDataService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.acme.data.repositories.UserRepository com.acme.data.services.UserDataService.userRepository; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalArgumentException: No [ManagedType] was found for the key class [com.acme.domain.entities.User] in the Metamodel - please verify that the [Managed] class was referenced in persistence.xml using a specific <class>com.acme.domain.entities.User</class> property or a global <exclude-unlisted-classes>false</exclude-unlisted-classes> element.
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:287)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1106)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:609)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:469)
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:383)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:283)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4779)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5273)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:897)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:873)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:615)
    at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:958)
    at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1599)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:680)
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.acme.data.repositories.UserRepository com.acme.data.services.UserDataService.userRepository; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalArgumentException: No [ManagedType] was found for the key class [com.acme.domain.entities.User] in the Metamodel - please verify that the [Managed] class was referenced in persistence.xml using a specific <class>com.acme.domain.entities.User</class> property or a global <exclude-unlisted-classes>false</exclude-unlisted-classes> element.
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:512)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:92)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:284)
    ... 27 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalArgumentException: No [ManagedType] was found for the key class [com.acme.domain.entities.User] in the Metamodel - please verify that the [Managed] class was referenced in persistence.xml using a specific <class>com.acme.domain.entities.User</class> property or a global <exclude-unlisted-classes>false</exclude-unlisted-classes> element.
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:149)
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:102)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1442)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:305)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:876)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:818)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:735)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:484)
    ... 29 more
Caused by: java.lang.IllegalArgumentException: No [ManagedType] was found for the key class [com.acme.domain.entities.User] in the Metamodel - please verify that the [Managed] class was referenced in persistence.xml using a specific <class>com.acme.domain.entities.User</class> property or a global <exclude-unlisted-classes>false</exclude-unlisted-classes> element.
    at org.eclipse.persistence.internal.jpa.metamodel.MetamodelImpl.entityEmbeddableManagedTypeNotFound(MetamodelImpl.java:174)
    at org.eclipse.persistence.internal.jpa.metamodel.MetamodelImpl.managedType(MetamodelImpl.java:489)
    at org.springframework.data.jpa.repository.support.JpaMetamodelEntityInformation.<init>(JpaMetamodelEntityInformation.java:58)
    at org.springframework.data.jpa.repository.support.JpaEntityInformationSupport.getMetadata(JpaEntityInformationSupport.java:65)
    at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getEntityInformation(JpaRepositoryFactory.java:149)
    at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:87)
    at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:70)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:137)
    at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.getObject(RepositoryFactoryBeanSupport.java:125)
    at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.getObject(RepositoryFactoryBeanSupport.java:41)
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:142)
    ... 37 more

Answer 1

我能够解决我的问题，但它是上面的另一个设置，我只是添加了一些我偶然发现的东西，直到我能够在我的SE环境中解决它：

Bug https://bugs.eclipse.org/bugs/show_bug.cgi?id=338837影响EclipseLink 2.2.0及更低版本。主要发生在Local-Environment（RESOURCE_LOCAL）中。 EclipseLink版本升级或以下解决方法可能会有所帮助：

<exclude-unlisted-classes>false</exclude-unlisted-classes>

在类路径中有多个persistence.xml文件（例如特别是在第三方JAR中），它们都定义了相同的持久性单元名称（上面的＃34;默认＆＃34;可能非常常见）。在这种情况下尝试重命名persistence-unit-name作为第一步
如果重命名persistence-unit-name工作但将其更改回旧值会重现问题，那么上面提到的第3方JAR或您自己项目的旧JAR包含在您的构建中（例如在项目级别或类似的重构/重命名改变了结构，例如maven构建仍然可以从存储库中获取旧的构建工件）

最后谈到我的设置（Spring-Standalone Application，没有persistence.xml，但因为使用了自定义公司框架而导致很多Spring配置），它表明我只是忘了添加自定义的实体包我想在我的本地项目中运行他们的一个服务实现（Spring-Bean实现）而不是从JAR依赖中获得服务实现时，framework-core。因此，请确保为EntityManagerFactory列出了所有必需的实体包：

    <bean id="customEntityManagerFactory" parent="abstractEntityManagerFactory">
        <property name="dataSource" ref="dataSource"/>


        <!-- Packages of EntityClasses -->
        <property name="packagesToScan">
            <list merge="true">
                <value>ch.company.div1.foo.bar.model</value>
                <value>ch.company.div1.foo.barnicle.model</value>
                <value>ch.company.div2.we.help.model</value>
            </list>
        </property>

        <property name="jpaProperties">
            <props merge="true">
                <prop key="eclipselink.target-database">org.eclipse.persistence.platform.database.SQLServerPlatform
                </prop>
                <prop key="javax.persistence.transactionType">RESOURCE_LOCAL</prop>
            </props>
        </property>
     </bean>

在我的情况下，我忘了添加模型packagege与我们公司的另一个部门（编写自定义框架核心）的已使用实体。

祝你好运，这个错误是一头野兽：/

Answer 2

不确定您是否遇到了同样的问题：尝试创建2个不同的实体工厂......异常是相同的，所以这可能会有所帮助。实际上，当它在错误的EntityManagerFactory上实例化实体时发生了这种异常。

我的项目运行正常，只有一个数据库连接但是当我添加第二个时，EclipseLink对实例化我的实体的位置感到困惑。经过一些调试之后，我的结论是从我的root-context.xml中删除属性“packagesToScan”并将其替换为“persistenceXmlLocation”。在那个XML中，我列出了我需要扫描的每个类，并用“＆lt; exclude-unlisted-classes＆gt;”排除其他所有类

以下是我目前正在使用的完整XML配置：

根context.xml中

<bean id="dataSource1" class="org.apache.commons.dbcp2.BasicDataSource" destroy-method="close">
    <property name="driverClassName" value="org.postgresql.Driver" />
    <property name="url" value="jdbc:postgresql://server1.example.com:5432/db1" />
    <property name="username" value="username" />
    <property name="password" value="password" />
    <property name="defaultAutoCommit" value="false" />
    <property name="initialSize" value="5" />
    <property name="maxIdle" value="5" />
    <property name="validationQuery" value="SELECT 1" />
    <property name="timeBetweenEvictionRunsMillis" value="600000" />
    <property name="poolPreparedStatements" value="true" />
    <property name="maxOpenPreparedStatements" value="10" />
</bean>

<bean id="dataSource2" class="org.apache.commons.dbcp2.BasicDataSource" destroy-method="close">
    <property name="driverClassName" value="org.postgresql.Driver" />
    <property name="url" value="jdbc:postgresql://server2.example.com:5432/db2" />
    <property name="username" value="user" />
    <property name="password" value="password" />
    <property name="defaultAutoCommit" value="false" />
    <property name="initialSize" value="5" />
    <property name="maxIdle" value="5" />
    <property name="validationQuery" value="SELECT 1" />
    <property name="timeBetweenEvictionRunsMillis" value="600000" />
    <property name="poolPreparedStatements" value="true" />
    <property name="maxOpenPreparedStatements" value="10" />
</bean>


<bean id="emf1" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
    <property name="dataSource" ref="dataSource1" />
    <property name="persistenceXmlLocation" value="classpath:META-INF/persistence1.xml" />
    <property name="jpaVendorAdapter">
        <bean class="org.springframework.orm.jpa.vendor.EclipseLinkJpaVendorAdapter">
            <property name="showSql" value="false" />
        </bean>
    </property>
    <property name="jpaPropertyMap">
        <map>
            <entry key="eclipselink.weaving" value="false" />
            <entry key="eclipselink.logging.level" value="WARNING" />
            <entry key="eclipselink.logging.timestamp" value="false" />
            <entry key="eclipselink.logging.session" value="false" />
            <entry key="eclipselink.logging.thread" value="false" />
        </map>
    </property>
    <property name="loadTimeWeaver">
        <bean class="org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver" />
    </property>
</bean>

<bean id="emf2" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
    <property name="dataSource" ref="dataSource2" />
    <property name="persistenceXmlLocation" value="classpath:META-INF/persistence2.xml" />
    <property name="jpaVendorAdapter">
        <bean class="org.springframework.orm.jpa.vendor.EclipseLinkJpaVendorAdapter">
            <property name="showSql" value="false" />
        </bean>
    </property>
    <property name="jpaPropertyMap">
        <map>
            <entry key="eclipselink.weaving" value="false" />
            <entry key="eclipselink.logging.level" value="WARNING" />
            <entry key="eclipselink.logging.timestamp" value="false" />
            <entry key="eclipselink.logging.session" value="false" />
            <entry key="eclipselink.logging.thread" value="false" />
        </map>
    </property>
    <property name="loadTimeWeaver">
        <bean class="org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver" />
    </property>
</bean>

<bean name="transaction1" class="org.springframework.orm.jpa.JpaTransactionManager" p:entity-manager-factory-ref="emf1" />
<bean name="transaction2" class="org.springframework.orm.jpa.JpaTransactionManager" p:entity-manager-factory-ref="emf2" />

<jpa:repositories base-package="org.myproject.repository1" transaction-manager-ref="transaction1" entity-manager-factory-ref="emf1" />
<jpa:repositories base-package="org.myproject.repository2" transaction-manager-ref="transaction2" entity-manager-factory-ref="emf2" />

<tx:annotation-driven />

persistence1.xml

<persistence-unit name="persistence1" transaction-type="RESOURCE_LOCAL">
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
    <class>org.myproject.repository1.Repo1</class>
    <class>org.myproject.repository1.Repo2</class>
    <exclude-unlisted-classes>true</exclude-unlisted-classes>
</persistence-unit>

persistence2.xml

<persistence-unit name="persistence2" transaction-type="RESOURCE_LOCAL">
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
    <class>org.myproject.repository2.Repo1</class>
    <class>org.myproject.repository2.Repo2</class>
    <exclude-unlisted-classes>true</exclude-unlisted-classes>
</persistence-unit>

所以，这对我有用......

显然指定每个“persistence.xml”位置可防止在第一个“emf”上实例化用于另一个EntityManagerFactory的类。事实上，这看起来像一个错误https://bugs.eclipse.org/bugs/show_bug.cgi?id=338837。我可以从调试中得出的结论是，如果没有“persistenceXmlLocation”，在“packageScan”中找到的所有类都在第一个创建的“emf”上实例化，第二个“emf”被完全忽略。

希望这会有所帮助。祝你好运！

Answer 3

将包含（com.acme.domain.entities）的实体添加到packagesToScan。

Answer 4

设置PersistenceUnitName，而不是persistenceXmlLocation

不需要persistence.xml。

factory.setPersistenceUnitName("dummy1");
factory.setPersistenceUnitName("dummy2");

Eclipselink＆amp;春季数据

4 个答案: