冲突的持久性单元定义

春3.1.1 的Maven 3.0.4 JPA 的Eclipse WTP靛蓝冲突的持久性单元定义

你好，我得到在服务器启动时出现以下异常。我的项目中只有一个persistence.xml。有任何想法吗？感谢埃里克

产生的原因：java.lang.IllegalStateException：冲突的持久性单元定义为名称 'cassandra_pu'：文件：/ 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/ 在org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.preparePersistenceUnitInfos（DefaultPersistenceUnitManager.java:362）在org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.afterPropertiesSet（DefaultPersistenceUnitManager.java:326）在org.springframework。 orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory（ LocalContainerEntityManagerFactoryBean.java:235）在在org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet（AbstractEntityManagerFactoryBean.java:310）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods（AbstractAutowireCapableBeanFactory.java:1514） org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1452） ...... 62多个

我的背景文件：

<?xml version="1.0" encoding="UTF-8"?> 
<beans xmlns="http://www.springframework.org/schema/beans" 
     xmlns:mvc="http://www.springframework.org/schema/mvc" 
     xmlns:context="http://www.springframework.org/schema/context" 
     xmlns:tx="http://www.springframework.org/schema/tx" 
     xmlns:p="http://www.springframework.org/schema/p" 
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
     xsi:schemaLocation="http://www.springframework.org/schema/beans 
     http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 
     http://www.springframework.org/schema/context 
     http://www.springframework.org/schema/context/spring-context-3.0.xsd 
     http://www.springframework.org/schema/mvc 
     http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd 
     http://www.springframework.org/schema/tx 
     http://www.springframework.org/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文件在META-INF，它应该是：

<persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
     xsi:schemaLocation="http://java.sun.com/xml/ns/persistence 
     http://java.sun.com/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>

来源

2012-07-25 badgerduke

尝试增加，

<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>

要使用的Spring bean定义你的persistence.xml位置。

您也可以参考： https://github.com/xamry/twitample/blob/master/src/main/resources/appContext.xml

为persistence.xml具体配置。

来源

2012-07-27 10:49:52

冲突的持久性单元定义

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