Spring - PersistenceContext - No transactional EntityManager available - database

Question

i am using spring with JPA and all my getters are working. I can get object from database but when i try to save something, i get the error "No transactional EntityManager available" and i have the annotations for transactions.
Here is my DAO:
#Repository("userDao")
#Transactional
//public class UserDaoImpl extends GenericDaoImpl<User, Long> implements IUserDao {
public class UserDaoImpl implements IUserDao {
final protected Logger logger = LoggerFactory.getLogger(this.getClass());
public UserDaoImpl() {
}
#PersistenceContext(unitName = "ovdigitalPU")
protected EntityManager entityManager;
#Override
#Transactional(readOnly = false, propagation = Propagation.REQUIRED)
public void save(User user) throws DuplicatedUserException {
logger.info("Creating User with username: " + user.getUsername());
User foundUser = null;
logger.info("Checking if user already existis...");
/*foundUser = this.findByUsername(user.getUsername());
if(foundUser != null) {
throw new DuplicatedUserException();
}*/
entityManager.persist(user);
logger.info("User " + user.getUsername() + " was been saved with success!");
}
Here is my root-context.xml
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
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
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-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/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<!-- Root Context: defines shared resources visible to all other web components -->
<context:annotation-config />
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/" />
<property name="suffix" value=".jsp" />
</bean>
<bean id="ovdigitalDS"
class="org.apache.commons.dbcp.BasicDataSource"
p:driverClassName="com.mysql.jdbc.Driver" p:url="jdbc:mysql://localhost/ovdigital"
p:username="ovdigital" p:password="12345">
</bean>
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="ovdigitalDS" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager" />
<context:spring-configured />
<context:annotation-config />
</beans>
And my persistence.xml:
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
<persistence-unit name="ovdigitalPU">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
<property name="hibernate.transaction.auto_close_session" value="false"/>
<property name="hibernate.show_sql" value="true"/>
<property name="hibernate.format_sql" value="false"/>
<property name="hibernate.generate_statistics" value="false"/>
<property name="hibernate.connection.autocommit" value="true"/>
<property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>
</properties>
</persistence-unit>
</persistence>
In debugger mode, when the server try to execute this line - entityManager.persist(user); i get this exception javax.persistence.TransactionRequiredException: No transactional EntityManager available.
What i can do to solve my problem?

Answer 1

It's amazing, but for me the method's signature made all the difference:
#Transactional
void save(Entity entity) //throw No transactional EntityManager available
and
#Transactional
public void save(Entity entity) //ok

Answer 2

I ran into this and something else solved it for me.
I am using an all-Java configuration (no-xml) and had forgotten the #EnableTransactionManagement annotation on my configuration class. That's it.