修复 OSGi 环境中的 OpenJPA 实体增强

Question

我正在尝试在 OSGi 容器（即 Apache Servicemix）中部署我的包。在其中，我有我的 OpenJPA 实体。我正在使用 OpenJPA 2.3.0 版。当我尝试通过我的 Spring bean 访问这些实体时，使用 EntityManager，我收到此错误：

1  model  WARN   [SpringOsgiExtenderThread-4] openjpa.Runtime - An error occurred while registering a ClassTransformer with PersistenceUnitInfo: name 'model', root URL [bundle://220.0:1]. The error is logged along with this warning. Load-time class transformation will not be available.java.lang.reflect.UndeclaredThrowableException
at com.sun.proxy.$Proxy34.addTransformer(Unknown Source)
at org.apache.openjpa.persistence.PersistenceProviderImpl.createContainerEntityManagerFactory(PersistenceProviderImpl.java:169)
at org.apache.openjpa.persistence.PersistenceProviderImpl.createContainerEntityManagerFactory(PersistenceProviderImpl.java:62)
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:288)
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:310)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1541)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1479)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:521)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1117)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:922)
at org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext.access$1600(AbstractDelegatedExecutionApplicationContext.java:69)
at org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext$4.run(AbstractDelegatedExecutionApplicationContext.java:355)
at org.springframework.osgi.util.internal.PrivilegedUtils.executeWithCustomTCCL(PrivilegedUtils.java:85)
at org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext.completeRefresh(AbstractDelegatedExecutionApplicationContext.java:320)
at org.springframework.osgi.extender.internal.dependencies.startup.DependencyWaiterApplicationContextExecutor$CompleteRefreshTask.run(DependencyWaiterApplicationContextExecutor.java:132)
at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager$Jpa2PersistenceUnitInfoDecorator.invoke(DefaultPersistenceUnitManager.java:617)
... 21 more
Caused by: java.lang.IllegalStateException: Cannot apply class transformer without LoadTimeWeaver specified
at org.springframework.orm.jpa.persistenceunit.SpringPersistenceUnitInfo.addTransformer(SpringPersistenceUnitInfo.java:109)
... 26 more

请记住，我的持久性单元被称为“模型” - 为了更清晰的概述。任何人都可以帮助我使用 maven 增强我的实体吗？

下面是我的 pom.xml 格式的 sn-p：

<plugin>
    <groupId>org.apache.openjpa</groupId>
    <artifactId>openjpa-maven-plugin</artifactId>
    <version>2.3.0</version>
    <executions>
        <execution>
            <id>JPA Enhance</id>
            <phase>process-classes</phase>
            <goals>
                <goal>enhance</goal>
            </goals>
        </execution>
    </executions>
    <configuration>
        <includes>**/entity/*.class</includes>
        <excludes>**/entity/XML*.class</excludes>
        <addDefaultConstructor>true</addDefaultConstructor>
        <enforcePropertyRestrictions>true</enforcePropertyRestrictions>
    </configuration>
</plugin>

谁能告诉我应该在包含/排除标签中放置什么而不是实体？ 有了这个，就会发生上面提供的错误。我想我已经接近解决方案，但无法让它发挥作用。

Answer 1

在不知道您的 persistence.xml 的情况下，我猜您缺少以下内容：

<property name="openjpa.RuntimeUnenhancedClasses" value="supported" />

如果不是这样，我会去寻找为什么 spring 似乎确实存在问题。