冲突的持久性单位定义

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Spring 3.1.1 Maven 3.0.4 JPA Eclipse wtp indigo

Spring 3.1.1 Maven 3.0.4 JPA Eclipse wtp indigo

您好，我是在服务器启动时收到以下异常。我的项目中只有一个persistence.xml。有任何想法吗？感谢Eric

Hello, I am getting the following exception on server startup. I have just one persistence.xml in my project. Any ideas? Thanks Eric

导致：java.lang.IllegalStateException：名称为cassandra_pu的冲突持久性单元定义：file：/ C：/ workspace /.metadata/.plugins/org.eclipse.wst.server.core/tmp1/wtpwebapps/cassandra/WEB-INF/classes/，file：/ C：/workspace/.metadata/.plugins/org.eclipse.wst。 org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.preparePersistenceUnitInfos（DefaultPersistenceUnitManager.java:362）中的server.core / tmp1 / wtpwebapps / cassandra / WEB-INF / classes / 在org.springframework上的。 orm.jpa.persistenceunit.DefaultPersistenceUnitManager.afterPropertiesSet（DefaultPersistenceUnitManager.java:326）在org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory（LocalContainerEntityManagerFactoryBean.java:235）在org.springframework.orm。 jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet（AbstractEntityManagerFactoryBean.java:310）在org.springframework。 bean.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods（AbstractAutowireCapableBeanFactory.java:1514）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1452） ...更多62

Caused by: java.lang.IllegalStateException: Conflicting persistence unit definitions for name 'cassandra_pu': file:/C:/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp1/wtpwebapps/cassandra/WEB-INF/classes/, file:/C:/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp1/wtpwebapps/cassandra/WEB-INF/classes/ at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.preparePersistenceUnitInfos(DefaultPersistenceUnitManager.java:362) at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.afterPropertiesSet(DefaultPersistenceUnitManager.java:326) at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:235) at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:310) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1514) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1452) ... 62 more

我的上下文文件：

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="www.springframework/schema/beans" xmlns:mvc="www.springframework/schema/mvc" xmlns:context="www.springframework/schema/context" xmlns:tx="www.springframework/schema/tx" xmlns:p="www.springframework/schema/p" xmlns:xsi="www.w3/2001/XMLSchema-instance" xsi:schemaLocation="www.springframework/schema/beans www.springframework/schema/beans/spring-beans-3.0.xsd www.springframework/schema/context www.springframework/schema/context/spring-context-3.0.xsd www.springframework/schema/mvc www.springframework/schema/mvc/spring-mvc-3.0.xsd www.springframework/schema/tx www.springframework/schema/tx/spring-tx-3.0.xsd"> <context:component-scan base-package="hamacher.cassandra.controller" /> <context:component-scan base-package="hamacher.cassandra.dao" /> <context:component-scan base-package="hamacher.cassandra.service" /> <context:annotation-config /> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/"/> <property name="suffix" value=".jsp"/> </bean> <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> <property name="packagesToScan" value="hamacher.cassandra.entity"/> <property name="persistenceUnitName" value="cassandra_pu"/> </bean> <tx:annotation-driven /> <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"> <property name="entityManagerFactory" ref="entityManagerFactory" /> </bean> </beans>

我的persistence.xml文件位于META-INF中，应该是：

My persistence.xml file is in META-INF where it should be:

<persistence xmlns="java.sun/xml/ns/persistence" xmlns:xsi="www.w3/2001/XMLSchema-instance" xsi:schemaLocation="java.sun/xml/ns/persistence java.sun/xml/ns/persistence/persistence_2_0.xsd" version="2.0"> <persistence-unit name="cassandra_pu"> <provider>com.impetus.kundera.KunderaPersistence</provider> <properties> <property name="kundera.nodes" value="localhost"/> <property name="kundera.port" value="9160"/> <property name="kundera.keyspace" value="KunderaExamples"/> <property name="kundera.dialect" value="cassandra"/> <property name="kundera.client.lookup.class" value="com.impetus.client.cassandra.pelops.PelopsClientFactory" /> <property name="kundera.cache.provider.class" value="com.impetus.kundera.cache.ehcache.EhCacheProvider"/> <property name="kundera.cache.config.resource" value="/ehcache-test.xml"/> </properties> </persistence-unit> </persistence>

推荐答案

尝试添加

<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" /> <bean id="emf-p" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> <!-- <property name="persistenceXmlLocation" value="/WEB-INF/classes/META-INF/persistence.xml" /> --> <property name="persistenceUnitManager" ref="pum"/> <property name="persistenceUnitName" value="personnel_cass_pu" /> <property name="loadTimeWeaver"> <bean class="org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver" /> </property> </bean>

使用Spring bean定义persistence.xml位置。

To define your persistence.xml location with Spring bean.

您还可以参考： github/xamry/twitample/blob/master/src/main/resources/appContext.xml

persistence.xml 具体配置。