Spring+ Hibernate :How to map single session factory in multiple modules (deployed as jar)
我目前正在开发Spring Struts2和Hibernate,我的要求是:
所有特定于模块的.hbm和持久性类将存在于模块本身中
因此,例如,我的主模块将具有Hibernate连接文件(通过spring)和所有.hbm映射文件,以下是通过Spring建立的Hibernate连接的示例。
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | <bean id="dataSourceErik" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="com.mysql.jdbc.Driver" /> <property name="testWhileIdle" value="true" /> <property name="minEvictableIdleTimeMillis" value="120000" /> <property name="timeBetweenEvictionRunsMillis" value="30000" /> </bean> <bean id="sessionFactoryErik" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"> <property name="dataSource" ref="dataSourceErik" /> <property name="hibernateProperties"> <value> hibernate.dialect=org.hibernate.dialect.MySQLDialect hibernate.generate_statistics=true hibernate.show_sql=false hibernate.jdbc.batch_size=10 hibernate.bytecode.use_reflection_optimizer=true hibernate.cache.provider_class=org.hibernate.cache.EhCacheProvider hibernate.cache.region.factory_class=org.hibernate.cache.ehcache.EhCacheRegionFactory hibernate.cache.use_second_level_cache=true hibernate.cache.use_query_cache=true net.sf.ehcache.configurationResourceName=configuration/ehcache.xml </value> </property> <property name="mappingLocations"> <list> <value>classpath:configuration/hibernate/Abc.hbm.xml</value> <value>classpath:configuration/hibernate/Xyz.hbm.xml</value> </list> </property> </bean> <bean id="AbcActionDAO" class="au.com.master.persistance.dao.AbcDbSession"> <constructor-arg ref="sessionFactoryErik" /> </bean> <bean id="XyzActionTypeDAO"class="au.com.master.persistance.dao.XyzDbSession"> <constructor-arg ref="sessionFactoryErik" /> </bean> |
如果我在上面的xml中添加以下代码,则可以访问'''sessionFactory'''并可以与数据库连接。当我给出已部署的subModule jar文件的路径时,请参见以下代码:
1 2 3 4 5 | <property name="mappingJarLocations"> <list> <value>WEB-INF/lib/subModule.jar</value> </list> </property> |
.hbm和DAO / DbSession类以上均存在于主模块中。现在,我想在部署为jar的Sub模块中使用此'''sessionFactoryErik'''。因此,为此我在Sub模块中创建了另一个xml文件,该文件将引用上述'''sessionFactoryErik'''并将具有该模块特定.hbm和DAO / DbSession的映射。请参阅以下代码:
1 2 3 4 5 6 7 8 9 10 11 12 | <bean id="sessionFactoryMonitor" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"> <property name="sessionFactoryErik" ref="sessionFactoryErik" /> <property name="mappingLocations"> <list> <value>classpath:configuration/hibernate/DDDType.hbm.xml</value> </list> </property> </bean> <bean id="testActionDAO" class="au.com.java.subModule.persistance.dao.DddActionDbSession"> <constructor-arg ref="sessionFactoryMonitor" /> </bean> |
如果我部署了项目并重新启动服务器,则出现以下错误。
1 | org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactoryMonitor' defined in URL [jar:file:/home/developer/Project/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/webapps/erik/WEB-INF/lib/erik-monitor-1.0-SNAPSHOT.jar!/configuration/spring-monitor-dao.xml]: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'sessionFactoryErik' of bean class [org.springframework.orm.hibernate4.LocalSessionFactoryBean]: Bean property 'sessionFactoryErik' is not writable or has an invalid setter method. |
有人可以帮我吗?我如何才能在子模块中获得相同的会话对象,因为只有主模块才能建立连接,因为它将不了解其已部署(部署为jar)模块。
谢谢。
Tapan
类
1 2 3 4 5 6 7 8 | <bean id="sessionFactoryMonitor" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"> <property name="sessionFactoryErik" ref="sessionFactoryErik" /> <property name="mappingLocations"> <list> <value>classpath:configuration/hibernate/DDDType.hbm.xml</value> </list> </property> </bean> |
对此
1 2 3 4 5 6 7 8 | <bean id="sessionFactoryMonitor" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"> <property name="dataSource" ref="sessionFactoryErik" /> <property name="mappingLocations"> <list> <value>classpath:configuration/hibernate/DDDType.hbm.xml</value> </list> </property> </bean> |
sessionFactoryErik bean返回org.hibernate.internal.SessionFactoryImpl对象,
因此您应该指定org.hibernate.internal.SessionFactoryImpl或其父类
(SessionFactory)输入au.com.master.persistance.dao.XyzDbSession构造函数
参考。