EntityManager persist() method does not insert record to database - spring

Question

I have problem with using EntityManager.persist(Object) method. Now when i get rid of other problems, by app work without Exception but object is not put in my database.
my entity class:
#Entity
#Table(name ="Chain")
public class Chain implements Serializable{
#Id
#Column(name = "id")
private Long id;
#Column(name = "date")
private Date date;
#Column(name = "name")
private String name;
//setters and getters
}
my dao class:
#Transactional
#Repository("ChainDao")
public class ChainDaoImpl implements ChainDao{
private EntityManager em;
#PersistenceContext
public void setEntityManager(EntityManager em) {
this. em = em;
}
public int saveChain(Chain chain) {
chain.setDate(new Date());
chain.setId((long)44);
Boolean a;
em.persist(chain);
return 222;
}
}
my xml context:
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" >
<property name="persistenceXmlLocation" value="classpath*:META-INF/persistence.xml"></property></bean>
<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />
<bean class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory"
ref="entityManagerFactory" />
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
and pereistence.xml:
<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="1.0">
<persistence-unit name="sample">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<!-- Scan for annotated classes and Hibernate mapping XML files -->
<properties>
<property name="hibernate.archive.autodetection" value="class, hbm"/>
<property name="hibernate.connection.driver_class" value="org.postgresql.Driver"/>
<property name="hibernate.connection.url" value="jdbc:postgresql://localhost:5432/database"/>
<property name="hibernate.connection.username" value="postgres"/>
<property name="hibernate.connection.password" value="pwd"/>
<property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect"/>
<property name="hibernate.show_sql" value="true"/>
</properties>
</persistence-unit>
</persistence>
Do anyone have a idea what am i missing?

Answer 1

Are you getting a specific exception? It would be helpful to know what it is if you are.
There are a number of similar problems to this already on Stackoverflow:
Spring transactional context doesn't persist data
Spring, Hibernate & JPA: Calling persist on entitymanager does not seem to commit to database
These suggest that you should try adding em.flush() after the em.persist(chain), and altering the #transactional annotations
You should also check that you have enabled transactional annotations through a line such as :
<tx:annotation-driven transaction-manager="transactionManager"/>
in your .xml configuration

Answer 2

Try this:
em.getTransaction().begin();
em.persist(entity);
em.getTransaction().commit();
PS: You should set a generation method for your ID as well.

Answer 3

Can you post what exception are you getting? I will assume that your error is that your persistence.xml you don't specified your "Chain" Object.
You can specify using this tag
<exclude-unlisted-classes>false</exclude-unlisted-classes>
Or just
<class>your.package.Chain</class>
Put this above provider tag.
Also, never set a number for a column tagged as #Id
When you use method save() with a Id column with setted value, hibernate
will try to UPDATE NOT INSERT your data.
Do this:
Create getEntityManager Method
public EntityManager getEntityManager() {
return entityManager;
}
Then
#Transactional
public void saveChain(Chain chain) {
chain.setDate(new Date());
getEntityManager().persist(chain);
}

Answer 4

Adding these to your web.xml may solve this problem:
<!-- Open Entity Manager in View filter -->
<filter>
<filter-name>openEntityManagerInViewFilter</filter-name>
<filter-class>org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>openEntityManagerInViewFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

Answer 5

solved my problem using
org.springframework.transaction.jta.JtaTransactionManager
hope this work!

Answer 6

Use #EnableTransactionManagement in AppConfig Configuration file header

Answer 7

You can open the new Transaction and then commit your records.
#PersistenceUnit(unitName = "NameOfPersistenceUnit")
private EntityManagerFactory entityManagerFactory;
void someMethod(AccountCommodity accountCommodity){
EntityManager entityManager = entityManagerFactory.createEntityManager();
entityManager.getTransaction().begin();
entityManager.persist(accountCommodity);
entityManager.flush();
entityManager.getTransaction().commit();
entityManager.close();
}

Answer 8

You will need to assign id generation strategy as below:
#Entity
#Table(name ="Chain")
public class Chain implements Serializable{
#Id
#Column(name = "id")
#GeneratedValue(strategy=GenerationType.IDENTITY)
private Long id;
#Column(name = "date")
private Date date;
#Column(name = "name")
private String name;
//setters and getters
}
and in save method
public int saveChain(Chain chain) {
chain.setDate(new Date());
//chain.setId((long)44); remove this line
Boolean a;
em.persist(chain);
return 222;
}
if you assign Id, then hibernate/jpa will try to update record, which is not available, instead of inserting new record and I think will not throw exception.

Answer 9

I was able to fix the same problem by adding the Entity to persistence.xml:
<persistence-unit name="OwnerPersistenceUnit" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>com.test.domain.local.Entity</class>
<exclude-unlisted-classes />
</persistence-unit>
</persistence>