我正在使用Spring 4和Hibernate 4并尝试配置多个数据源 . 当我使用新的第二个时,我总是得到一个错误 .
package org.miso.vre.config;
import java.util.Properties;
import javax.annotation.Resource;
import javax.sql.DataSource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.env.Environment;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.orm.hibernate4.HibernateTransactionManager;
import org.springframework.orm.hibernate4.LocalSessionFactoryBean;
import org.springframework.transaction.annotation.EnableTransactionManagement;
@Configuration
@EnableTransactionManagement
@ComponentScan("org.miso.vre")
@PropertySource("classpath:database.properties")
public class DatabaseConfig {
private static final String PROPERTY_NAME_DATABASE_DRIVER = "db.driver";
private static final String PROPERTY_NAME_DATABASE_PASSWORD = "db.password";
private static final String PROPERTY_NAME_DATABASE_URL = "db.url";
private static final String PROPERTY_NAME_DATABASE_USERNAME = "db.username";
private static final String PROPERTY_NAME_DATABASE_MISOFT_DRIVER = "db.misoft.driver";
private static final String PROPERTY_NAME_DATABASE_MISOFT_PASSWORD = "db.misoft.password";
private static final String PROPERTY_NAME_DATABASE_MISOFT_URL = "db.misoft.url";
private static final String PROPERTY_NAME_DATABASE_MISOFT_USERNAME = "db.misoft.username";
private static final String PROPERTY_NAME_HIBERNATE_DIALECT = "hibernate.dialect";
private static final String PROPERTY_NAME_HIBERNATE_SHOW_SQL = "hibernate.show_sql";
private static final String PROPERTY_NAME_ENTITYMANAGER_PACKAGES_TO_SCAN = "entitymanager.packages.to.scan";
@Resource
private Environment env;
@Bean
public DataSource dataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(env.getRequiredProperty(PROPERTY_NAME_DATABASE_DRIVER));
dataSource.setUrl(env.getRequiredProperty(PROPERTY_NAME_DATABASE_URL));
dataSource.setUsername(env.getRequiredProperty(PROPERTY_NAME_DATABASE_USERNAME));
dataSource.setPassword(env.getRequiredProperty(PROPERTY_NAME_DATABASE_PASSWORD));
return dataSource;
}
@Bean
public DataSource dataSourceMISOFT() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(env.getRequiredProperty(PROPERTY_NAME_DATABASE_MISOFT_DRIVER));
dataSource.setUrl(env.getRequiredProperty(PROPERTY_NAME_DATABASE_MISOFT_URL));
dataSource.setUsername(env.getRequiredProperty(PROPERTY_NAME_DATABASE_MISOFT_USERNAME));
dataSource.setPassword(env.getRequiredProperty(PROPERTY_NAME_DATABASE_MISOFT_PASSWORD));
return dataSource;
}
private Properties hibProperties() {
Properties properties = new Properties();
properties.put(PROPERTY_NAME_HIBERNATE_DIALECT, env.getRequiredProperty(PROPERTY_NAME_HIBERNATE_DIALECT));
properties.put(PROPERTY_NAME_HIBERNATE_SHOW_SQL, env.getRequiredProperty(PROPERTY_NAME_HIBERNATE_SHOW_SQL));
return properties;
}
@Bean
public HibernateTransactionManager transactionManager() {
HibernateTransactionManager transactionManager = new HibernateTransactionManager();
transactionManager.setSessionFactory(sessionFactory().getObject());
return transactionManager;
}
@Bean
public LocalSessionFactoryBean sessionFactory() {
LocalSessionFactoryBean sessionFactoryBean = new LocalSessionFactoryBean();
sessionFactoryBean.setDataSource(dataSource());
sessionFactoryBean.setPackagesToScan(env.getRequiredProperty(PROPERTY_NAME_ENTITYMANAGER_PACKAGES_TO_SCAN));
sessionFactoryBean.setHibernateProperties(hibProperties());
return sessionFactoryBean;
}
@Bean
public LocalSessionFactoryBean sessionFactoryMISOFT() {
LocalSessionFactoryBean sessionFactoryBean = new LocalSessionFactoryBean();
sessionFactoryBean.setDataSource(dataSourceMISOFT());
sessionFactoryBean.setPackagesToScan(env.getRequiredProperty(PROPERTY_NAME_ENTITYMANAGER_PACKAGES_TO_SCAN));
sessionFactoryBean.setHibernateProperties(hibProperties());
return sessionFactoryBean;
}
}
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.miso.vre.model.VRE_Record;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Repository;
@Repository
public class VRETestTableDAOImpl implements VRETestTableDAO {
@Autowired
@Qualifier(value="sessionFactoryMISOFT")
private SessionFactory sessionFactoryMISOFT;
private Session getCurrentSession() {
return sessionFactoryMISOFT.getCurrentSession();
}
public VRE_Record getVRE_Record(int id) {
VRE_Record vRE_Record = (VRE_Record) getCurrentSession().get(VRE_Record.class, id);
return vRE_Record;
}
}
package org.miso.vre.service;
import org.miso.vre.dao.VRETestTableDAO;
import org.miso.vre.model.VRE_Record;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
/**
* Created by PDuer on 12/29/2015.
*/
@Service
@Transactional
public class TestServiceImpl implements TestService {
@Autowired
private VRETestTableDAO vreTestTableDAO;
@Override
public VRE_Record getVRERecord (int id) {
return vreTestTableDAO.getVRE_Record(id);
}
}
exception org.springframework.web.util.NestedServletException:请求处理失败;嵌套异常是org.hibernate.HibernateException:找不到当前线程的会话org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:943)org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:822 )javax.servlet.http.HttpServlet.service(HttpServlet.java:622)org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:807)javax.servlet.http.HttpServlet.service(httpServlet.java:729 )org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)com.github.dandelion.datatables.core.web.filter.DatatablesFilter.doFilter(DatatablesFilter.java:73)root cause org.hibernate .HibernateException:找不到当前线程的会话org.springframework.orm.hibernate4.SpringSessionContext.currentSession(SpringSessionContext.java:106)org.hibernate.internal.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:1013)org.miso.vre.dao .VRETestTableDAOImpl.getCurrentSession(VRETestTableDAOImpl.java:18)org .miso.vre.dao.VRETestTableDAOImpl.getVRE_Record(VRETestTableDAOImpl.java:22)org.miso.vre.service.TestServiceImpl.getVRERecord(TestServiceImpl.java:22)sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)sun.reflect . NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
1 回答
原因是,
sessionFactoryMISOFT
与任何事务管理器都没有关联 . 只有sessionFactory
通过transactionManager()
方法与事务管理器关联 .您需要创建一个类似的方法,例如
transactionManagerMISOFT()
并将sessionFactoryMISOFT
与此新的transactionManager相关联 .当使用@Transaction属性时,我们需要指定需要使用哪个transactionManager .
在我的例子中,我已经定义了两个sessionFactories和两个transactionManager方法,如下所示:
在使用它时,我在您的服务类中指定了transactionManagerABC或transactionManagerXYZ以及Transactional属性,如下所示:
您需要为sessionFactory使用带有Autowired注释的限定符,我相信您已经拥有: