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entitymanager cannot use persist to save element to database


entitymanager cannot use persist to save element to database  using -'java,spring,hibernate,entitymanager'

I met the problem of persisting element to database using EntityManager. Based on the  answers I found, I tried those 4 ways in my DaoJpa to do such thing but still failed. Here I attached the four ways I tried:

Code in Controller part:

   @Transactional
   SmartProduct smartProduct = new SmartProduct();
            smartProduct.setName("Dove Soap");
            smartProductDao.persist(smartProduct);


1.
    DaoJpa:

 @Transactional
 public void persist(SmartProduct smartProduct) {
            entityManager.persist(smartProduct);


Doesn't work!

2.

@Transactional
public void persist(SmartProduct smartProduct) {
entityManager.persist(smartProduct);
entityManager.flush();



  Exception I got: no transaction is in progress


3.

@Transactional
public void persist(SmartProduct smartProduct) {
EntityTransaction emTransaction = entityManager.getTransaction();
        emTransaction.begin();  
        entityManager.persist(smartProduct);
        emTransaction.commit();
        entityManager.close();



  Exception I got:
      Not allowed to create transaction on shared EntityManager - use Spring
      transactions or EJB CMT instead


4.

@Transactional
public void persist(SmartProduct smartProduct) {
                    EntityManagerFactory emf = Persistence.createEntityManagerFactory("persistenceUnit");
                EntityManager em = emf.createEntityManager();
                EntityTransaction etx = em.getTransaction();
                etx.begin();
                em.persist(smartProduct);
                etx.commit();
                em.close();
                emf.close();



  Exception I got:
      The application must supply JDBC connections


Could someone help me  figure out the problem please? Many thanks in advance!

Many thanks JustinKSU's help. I add the annotation in Spring context and then it solved!
Here is the previous version of my Spring context:

<bean class="org.springframework.orm.jpa.JpaTransactionManager" id="transactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactory" />
    </bean>

    <tx:annotation-driven mode="aspectj" transaction-manager="transactionManager" />

    <bean class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" id="entityManagerFactory">
        <property name="persistenceUnitName" value="persistenceUnit" />
        <property name="dataSource" ref="dataSource" />
    </bean>


After added the

<tx:annotation-driven />


it works:

<tx:annotation-driven />
    <bean class="org.springframework.orm.jpa.JpaTransactionManager" id="transactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactory" />
    </bean>

    <tx:annotation-driven mode="aspectj" transaction-manager="transactionManager" />

    <bean class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" id="entityManagerFactory">
        <property name="persistenceUnitName" value="persistenceUnit" />
        <property name="dataSource" ref="dataSource" />
    </bean>

    

asked Sep 14, 2015 by JosTanner
0 votes
22 views



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2 Answers

0 votes

If you still have this problem and all the configurations are ok, please make sure that the @Transaction annotated method is public, not protected in order to be identified/managed by the transaction manager.

answered Sep 14, 2015 by StepanieManj
0 votes

To enable @Transactional in your Spring context you should have the following:

Appropriate for your version of Spring:

http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    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/tx " rel="nofollow" target="_blank">http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">

Enable the annotations:


Declare your transaction manager injecting your entity manager:


    

answered Sep 14, 2015 by VerSandover

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