我有一个应用程序上下文,我正在尝试设置 JPA:
application-context.xml:
<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor">
<property name="persistenceUnits">
<map>
<entry key="pu1" value="pu1" />
<entry key="pu2" value="pu2" />
</map>
</property>
<property name="defaultPersistenceUnitName" value="pu1" />
</bean>
<bean id="emf1" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="showSql" value="true" />
<property name="generateDdl" value="false" />
<property name="databasePlatform" value="org.hibernate.dialect.MySQLDialect" />
</bean>
</property>
<property name="persistenceUnitName" value="pu1" />
<property name="dataSource" ref="dataSource1" />
</bean>
<bean id="emf2" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="showSql" value="true" />
<property name="generateDdl" value="false" />
<property name="databasePlatform" value="org.hibernate.dialect.SQLServer2005Dialect" />
</bean>
</property>
<property name="persistenceUnitName" value="pu2" />
<property name="dataSource" ref="dataSource2" />
</bean>
<!-- Enable annotation style of managing transactions -->
<tx:annotation-driven />
<bean id="transactionManager1" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="emf1" />
<property name="dataSource" ref="dataSource1" />
</bean>
<bean id="transactionManager2" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="emf2" />
<property name="dataSource" ref="dataSource2" />
</bean>
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:config/db/database.properties</value>
</list>
</property>
<property name="ignoreUnresolvablePlaceholders" value="true" />
<property name="ignoreResourceNotFound" value="true" />
<property name="systemPropertiesModeName" value="SYSTEM_PROPERTIES_MODE_OVERRIDE"/>
</bean>
<!-- The actual config of the database is read from the properties file database.properties -->
<bean id="dataSource1" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close"
p:acquireIncrement="5" p:idleConnectionTestPeriod="14400" p:maxPoolSize="50" p:maxStatements="15"
p:minPoolSize="5" p:testConnectionOnCheckout="true" p:preferredTestQuery="SELECT 4;"
p:driverClass="${db.system1.driver}" p:jdbcUrl="${db.system1.url}" p:user="${db.system1.user}" p:password="${db.system1.password}" />
<bean id="dataSource2" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close" p:acquireIncrement="5" p:idleConnectionTestPeriod="60" p:maxPoolSize="10"
p:maxStatements="50" p:minPoolSize="3" p:testConnectionOnCheckout="true" p:preferredTestQuery="SELECT 4;"
p:driverClass="${db.system2.driver}" p:jdbcUrl="${db.system2.url}" p:user="${db.system2.user}" p:password="${db.system2.password}" />
<context:annotation-config />
<context:component-scan base-package="com.myapp.model.manager"/>
persistence.xml:
<persistence-unit name="pu1" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>com.myapp.model.Address</class>
<class>com.myapp.model.AgressoFile</class>
<class>com.myapp.model.CustomerGroup</class>
...
</persistence-unit>
<persistence-unit name="pu2" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>com.myapp.model.CompetenceArea</class>
<class>com.myapp.model.CompetenceAreaCategory</class>
...
</persistence-unit>
我以这种方式在 web.xml 中加载应用程序上下文:
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/spring/application-context.xml
</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
CompetenceAreaManager 位于扫描包“com.myapp.model.manager”中的类具有以下内容:
@Service
public class CompetenceAreaManager {
@PersistenceUnit(unitName = "pu2")
private EntityManagerFactory entityManagerFactory;
@SuppressWarnings("unchecked")
public List<CompetenceArea> getCompetenceAreas() {
List<CompetenceArea> competenceAreaList = null;
EntityManager em = entityManagerFactory.createEntityManager();
Query q = em.createNamedQuery(CompetenceArea.FIND_ALL);
competenceAreaList = q.getResultList();
return competenceAreaList;
}
public void setEntityManagerFactory(EntityManagerFactory entityManagerFactory) {
this.entityManagerFactory = entityManagerFactory;
}
}
但是,当我尝试在 Tomcat 7.0 中运行该应用程序时,出现以下错误:
SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'competenceAreaManager': Injection of persistence dependencies failed; nested exception is java.lang.IllegalStateException: Could not obtain EntityManagerFactory [pu2] from JNDI
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.postProcessPropertyValues(PersistenceAnnotationBeanPostProcessor.java:343)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1122)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:522)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:461)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295)
...
Caused by: java.lang.IllegalStateException: Could not obtain EntityManagerFactory [pu2] from JNDI
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.getPersistenceUnit(PersistenceAnnotationBeanPostProcessor.java:435)
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor$PersistenceElement.resolveEntityManagerFactory(PersistenceAnnotationBeanPostProcessor.java:643)
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor$PersistenceElement.getResourceToInject(PersistenceAnnotationBeanPostProcessor.java:637)
at org.springframework.beans.factory.annotation.InjectionMetadata$InjectedElement.inject(InjectionMetadata.java:150)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
...
Caused by: javax.naming.NameNotFoundException: Name [pu2] is not bound in this Context. Unable to find [pu2].
at org.apache.naming.NamingContext.lookup(NamingContext.java:820)
at org.apache.naming.NamingContext.lookup(NamingContext.java:168)
at org.apache.naming.SelectorContext.lookup(SelectorContext.java:158)
at javax.naming.InitialContext.lookup(Unknown Source)
at org.springframework.jndi.JndiTemplate$1.doInContext(JndiTemplate.java:154)
...
知道我做错了什么吗?
最佳答案
如果您使用 persistenceUnits 配置 PersistenceAnnotationBeanPostProcessor,您就是在通知 PersistenceAnnotationBeanPostProcessor PU 来自 JNDI(正如 setPersistenceUnits() 方法的 javadoc 提到的那样)。堆栈跟踪实际上显示了失败的 JNDI 查找。
由于您使用的是 <context:annotation-config/>
在 application-context.xml 中,你不需要声明一个 PersistenceAnnotationBeanPostProcessor,因为一个会被自动注册,它通过读取位于类路径中的 META-INF/persistence.xml 文件来查找 PU,这实际上是你所期望的.
您的配置应该像这样简单:
persistence.xml保持不变
能力领域经理
正如 Sergey Makarov 所提到的,只需使用 @PersistenceContext 注入(inject) EntityManager,而不是使用 @PersistenceUnit 注入(inject) EntityManagerFactory。 em 是事务性的(因此绑定(bind)到线程,从而确保您的 DAO 的线程安全),您仍然可以使用 unitName 配置 @PersistenceContext 以指定 EM 必须绑定(bind)到的 PU。
application-context.xml
只需删除 PersistenceAnnotationBeanPostProcessor bean 的声明。文件的其余部分保持不变。
我没有尝试过您的特定配置(2 个 PU),但我提到的配置是我一直在使用的配置,并取得了成功。
关于java - Spring ,JPA, hibernate ,Tomcat : Unable to find persistence unit when loading Spring application context,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/17743875/