[英]Spring mutliple datasources with Hibernate gives: No Session found error
我正在將Spring 4與Hibernate 4結合使用,並嘗試配置多個數據源。 當我使用新的第二個時,總是會出現錯誤。
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);
}
}
org.springframework.web.util.NestedServletException異常:請求處理失敗; 嵌套的異常是org.hibernate.HibernateException:當前會話的會話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)
根本原因是org.hibernate.HibernateException:當前會話未找到會話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(ServiceI 22)sun.reflect.NativeMethodAccessorImpl.invoke0(本機方法)sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
原因是, sessionFactoryMISOFT
沒有與任何事務管理器關聯。 只有sessionFactory
通過transactionManager()
方法與事務管理器關聯。
您需要創建一個類似的方法,例如transactionManagerMISOFT()
,並將sessionFactoryMISOFT
與此新的transactionManager關聯。
使用@Transaction屬性時,我們需要指定需要使用哪個transactionManager。
就我而言,我定義了兩個sessionFactories和兩個transactionManager方法,如下所示:
@Bean
public HibernateTransactionManager transactionManagerABC() {
return new HibernateTransactionManager(sessionFactoryABC().getObject());
}
@Bean
public HibernateTransactionManager transactionManagerXYZ() {
return new HibernateTransactionManager(sessionFactoryXYZ().getObject());
}
並且在使用它時,我在服務類中指定transactionManagerABC或transactionManagerXYZ以及Transactional屬性,如下所示:
@Transactional(transactionManager="transactionManagerABC")
public Forest getForestById(int id) {
return forestDAO.getForestById(id);
}
您需要為sessionFactory使用帶有自動裝配注釋的Qualifier,我相信您已經擁有:
@Qualifier("sessionFactoryABC")
private SessionFactory sessionFactory;
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