Having designed Service method including @Transactional method, I faced the problem of "No transactional EntityManager available". Technogoly uses: JPA, Spring, Maven
Exception stackTrace
Exception in thread "main" javax.persistence.TransactionRequiredException: No transactional EntityManager available
at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:273)
at com.sun.proxy.$Proxy29.merge(Unknown Source)
at com.restaurant.DAO.OrderDAOImpl.saveOrder(OrderDAOImpl.java:24)
at com.restaurant.services.DeliveryStaffServiceImpl.changeStatusOfOrder(DeliveryStaffServiceImpl.java:37)
at com.restaurant.entities.Main.main(Main.java:161)
The way I invoke service in main:
DeliveryStaffService del = context.getBean(DeliveryStaffService.class);
List<Order> listOfOrders = del.getListOfOrders();
Trying to figure out the issue tried:
<tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true"/>
Moreover, there are a few services with @transactional methods int the same project, which work without any problems.
Here is my persistence.xml:
<?xml version="1.0" encoding="UTF-8" ?>
<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"
xmlns="http://java.sun.com/xml/ns/persistence" version="2.0" >
<persistence-unit name="Restaurant" transaction-type="RESOURCE_LOCAL">
<provider>
org.eclipse.persistence.jpa.PersistenceProvider
</provider>
<properties>
<property name="javax.persistence.jdbc.driver" value="org.apache.derby.jdbc.EmbeddedDriver" />
<property name="javax.persistence.jdbc.url" value="jdbc:derby:..//RestaurantDB1;create=true" />
<property name="eclipselink.ddl-generation.output-mode" value="database" />
<property name="eclipselink.weaving" value="static" />
</properties>
</persistence-unit>
</persistence>
Beans.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<context:component-scan base-package="com.restaurant"/>
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="packagesToScan" value="com.restaurant"/>
<property name="dataSource" ref="dataSource"/>
<property name="persistenceUnitName" value="Restaurant"/>
<property name="jpaDialect">
<bean class="org.springframework.orm.jpa.vendor.EclipseLinkJpaDialect"/>
</property>
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.EclipseLinkJpaVendorAdapter">
<property value="true" name="showSql"/>
<property value="true" name="generateDdl"/>
<property name="databasePlatform" value="org.eclipse.persistence.platform.database.DerbyPlatform"/>
</bean>
</property>
<property name="jpaPropertyMap">
<map>
<entry key="eclipselink.weaving" value="false" />
</map>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>
<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor"/>
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="org.apache.derby.jdbc.EmbeddedDriver"/>
<property name="url" value="jdbc:derby:..//RestaurantDB1;create=true" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager"/>
<tx:annotation-driven proxy-target-class="true"/>
</beans>
Service Implementation
@Named
public class KitchenStaffServiceImpl implements KitchenStaffService {
@Inject
private ItemDAO itemDAO;
@Inject
private OrderDAO orderDAO;
@Override
public List<Item> viewItems() {
return itemDAO.viewItems();
}
@Override
@Transactional
public void processItem(Item item) {
int i=item.getQuantity();
while(i>0){
try {
Thread.sleep(1000);
--i;
} catch (InterruptedException e) {
e.printStackTrace();
}
}
item.setIsCooked(true);
itemDAO.saveItem(item);
System.out.println(item.getId());
List<Item> list = item.getOrder().getListOfDishes();
if(list.stream().allMatch(t -> t.getIsCooked()==true)){
Order ord = item.getOrder();
ord.setStatus(StatusOfDelivery.READY_FOR_SHIPMENT);
orderDAO.saveOrder(ord);
}
}
}
DAO Implementation
@Repository
public class ItemDAOImpl implements ItemDAO{
@PersistenceContext
private EntityManager em;
@Override
public void saveItem(Item item){
if(item.getId()==0){
em.persist(item);
}else
em.merge(item);
}
}
OrderDAOImpelementation with the method saveOrder(Order order) is the same as in ItemDAO (persist()/merge())
Thanks in advance for any propositions
Your're calling
OrderDAOImpl.saveOrder();
from the method
DeliveryStaffServiceImpl.changeStatusOfOrder();
but in the example you show that @Transactional
annotation is put on an unrelated method KitchenStaffServiceImpl.processItem()
. Most likely, you need the @Transactional
annotation on DeliveryStaffServicleImpl
.
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