JPA Change default Flushmode from AUTO to COMMIT

Question

I\'ve tried several ways to change the FlushMode to the complete application. Is this right or is there another way to do it?

I don\'t want to do this pragmmatically

Answer 1

Try this

<property name="org.hibernate.flushMode" value="COMMIT"/>

Testing this on a standalone program I can see the changed value of underlying Hibernate Session / EntityManager from AUTO to COMMIT

Here is my persistence.xml

<?xml version="1.0" encoding="UTF-8"?>
<persistence 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"
    version="2.0">
  <persistence-unit name="JPATest" transaction-type="RESOURCE_LOCAL">
  <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>  

  <class>com.test.TestEntity</class>  
  <shared-cache-mode>ENABLE_SELECTIVE</shared-cache-mode> 
  <properties> 
      <property name="hibernate.hbm2ddl.auto" value="update"/>
      <property name="hibernate.show_sql" value="true"/>
      <property name="hibernate.format_sql" value="true"/>
      <property name="hibernate.use_sql_comments" value="true"/>
      <property name="hibernate.cache.use_query_cache" value="true"/>
      <property name="hibernate.archive.autodetection" value="class, hbm"/>     
       <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect"/>
      <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>
      <property name="hibernate.connection.username" value="xxx"/>
      <property name="hibernate.connection.password" value="xxx"/>
      <property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/test?createDatabaseIfNotExist=true"/>      
       <property name="hibernate.cache.region.factory_class" value="org.hibernate.cache.ehcache.SingletonEhCacheRegionFactory"/>
       <property name="hibernate.cache.provider_configuration" value="classpath:ehcache.xml"></property>
      <property name="hibernate.use.second.level.cache" value="true"/>
      <property name="hibernate.cache.region_prefix" value="neutrino.jpa.cache"/>
      <property name="hibernate.cache.use_query_cache" value="false"/>
      <property name="hibernate.generate_statistics" value="true"/>
      <property name="hibernate.jdbc.batch_size" value="10"/>
      <property name="hibernate.order_updates" value="true"/>
      <property name="hibernate.order_inserts" value="true"/>
    <property name="org.hibernate.flushMode" value="COMMIT"/>    
  </persistence-unit>
</persistence>

And here is how I test it

 EntityManagerFactory emf  = Persistence.createEntityManagerFactory("JPATest");
 EntityManager em = emf.createEntityManager();
 Session session = em.unwrap(Session.class);
 System.out.println("Underlying Hibernate session flushmode #######         "+session.getFlushMode());
 System.out.println("EntityManager flushmode                #######         "+em.getFlushMode());

This gives me

Underlying Hibernate session flushmode #######         COMMIT
EntityManager flushmode                #######         COMMIT

If I omit the property in presistence.xml, I get this

Underlying Hibernate session flushmode #######         AUTO
EntityManager flushmode                #######         AUTO

Answer 2

Ancient Hibernate 3.2.4.sp1 from JBoss 4.2.3.GA supports only the following notation:

<property name="flush-mode" value="commit"/>