Spring + Hibernate : No Session found for current thread
Integrates Spring 3 and Hibernate 4, the system shows the following message while performing database operation :
org.hibernate.HibernateException: No Session found for current thread
The sessionFactory
is injected like this :
spring-hibernate4.xml
<beans xmlns="http://www.springframework.org/schema/beans"
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">
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/test" />
<property name="username" value="root" />
<property name="password" value="password" />
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="mappingResources">
<list>
<value>orm/Users.hbm.xml</value>
</list>
</property>
<property name="hibernateProperties">
<value>
hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
</value>
</property>
</bean>
<bean id="userDao" class="com.mkyong.users.dao.UserDaoImpl">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<bean id="userService" class="com.mkyong.users.service.UserServiceImpl">
<property name="userDao" ref="userDao" />
</bean>
</beans>
Solution
The sessionFactory
needs transaction to work, to solve it, declare a transaction manager in Spring.
Solution 1 : Declarative transaction management, declare transaction manager in an XML file, via Spring AOP.
spring-hibernate4.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/test" />
<property name="username" value="root" />
<property name="password" value="password" />
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="mappingResources">
<list>
<value>orm/Users.hbm.xml</value>
</list>
</property>
<property name="hibernateProperties">
<value>
hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
</value>
</property>
</bean>
<bean id="userDao" class="com.mkyong.users.dao.UserDaoImpl">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<bean id="userService" class="com.mkyong.users.service.UserServiceImpl">
<property name="userDao" ref="userDao" />
</bean>
<bean id="txManager"
class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
<tx:advice id="txAdvice" transaction-manager="txManager">
<tx:attributes>
<tx:method name="find*" read-only="true" />
<tx:method name="*" />
</tx:attributes>
</tx:advice>
<aop:config>
<aop:pointcut id="userServicePointCut"
expression="execution(* com.mkyong.users.service.*Service.*(..))" />
<aop:advisor advice-ref="txAdvice" pointcut-ref="userServicePointCut" />
</aop:config>
</beans>
Solution 2 : Programmatic transaction management, declare transaction manager in code.
package com.mkyong.users.service;
//...
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.support.TransactionCallback;
import org.springframework.transaction.support.TransactionTemplate;
public class UserServiceImpl implements UserService {
private UserDao userDao;
private TransactionTemplate transactionTemplate;
public void setTransactionManager(PlatformTransactionManager transactionManager) {
this.transactionTemplate = new TransactionTemplate(transactionManager);
}
@Override
public UserDetails findByUsername(final String username) {
// Programmatic transaction management
return transactionTemplate.execute(new TransactionCallback<UserDetails>() {
public UserDetails doInTransaction(TransactionStatus status) {
UserDetails user = userDao.findByUserName(username);
//etc etc
}
});
}
Note
For more information, please visit this Official Spring Transaction Management.
For more information, please visit this Official Spring Transaction Management.
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