@ManyToOne(optional=true)
@JoinColumn(name="b_id", nullable=true)
public B getB() {...}

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="jpaVendorAdapter">
            <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"/>                                 
        </property>
        <property name="jpaProperties">
            <util:properties location="classpath:com/obade/codex/dao/jpa/hibernate.properties"/>
        </property>
    </bean>

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

@Entity
@org.hibernate.annotations.Entity(optimisticLock = OptimisticLockType.VERSION, dynamicUpdate=true)
@org.hibernate.annotations.Cache(usage=org.hibernate.annotations.CacheConcurrencyStrategy.READ_WRITE)
@Table(name = "xedoc_admin.tbl_A)

   @Transactional(readOnly = false)

   public Boolean testPersist() {
      // using programmatic transactions
      
      transactionTemplate.execute(
            new TransactionCallback(){
               public Object doInTransaction(TransactionStatus ts) {
                  try{
                     VersionDomain v = versionDao.getVersion(1);
                     
                  }catch (Exception e) {
                     ts.setRollbackOnly();
                  }
                  return ts;
               }
               
            }
            
      );
      return true;
   
   }

12:49:46,328 INFO  [STDOUT] 2009-08-22 12:49:46,328 DEBUG [org.hibernate.SQL] - select versiondom0_.id as id41_4_, versiondom0_.codename as codename41_4_, versiondom0_.date_created as date3_41_4_, versiondom0_.date_modified as date4_41_4_, versiondom0_.description as descript5_41_4_, versiondom0_.link as link41_4_, versiondom0_.product_id as product10_41_4_, versiondom0_.unified_version_id as unified7_41_4_, versiondom0_.user_id as user11_41_4_, versiondom0_.versionname as versionn8_41_4_, versiondom0_.nostaw_version as nostaw9_41_4_, product1_.id as id25_0_, product1_.date_created as date2_25_0_, product1_.date_modified as date3_25_0_, product1_.deprecated as deprecated25_0_, product1_.description as descript5_25_0_, product1_.latest_version_id as latest6_25_0_, product1_.link as link25_0_, product1_.name as name25_0_, product1_.restricted as restricted25_0_, product1_.sap_code as sap10_25_0_, product1_.type_id as type14_25_0_, product1_.unified_prod_id as unified11_25_0_, product1_.user_id as user15_25_0_, product1_.nostaw_family as nostaw12_25_0_, product1_.nostaw_product as nostaw13_25_0_, producttyp2_.id as id27_1_, producttyp2_.date_created as date2_27_1_, producttyp2_.date_modified as date3_27_1_, producttyp2_.description as descript4_27_1_, producttyp2_.name as name27_1_, userdomain3_.id as id39_2_, userdomain3_.admin as admin39_2_, userdomain3_.obadenet_uid as obadenet3_39_2_, userdomain3_.date_created as date4_39_2_, userdomain3_.date_modified as date5_39_2_, userdomain3_.kitn_id as kitn6_39_2_, userdomain4_.id as id39_3_, userdomain4_.admin as admin39_3_, userdomain4_.obadenet_uid as obadenet3_39_3_, userdomain4_.date_created as date4_39_3_, userdomain4_.date_modified as date5_39_3_, userdomain4_.kitn_id as kitn6_39_3_ from xedoc_admin.tbl_versions versiondom0_ left outer join xedoc_admin.tbl_products product1_ on versiondom0_.product_id=product1_.id left outer join xedoc_admin.tbl_product_types producttyp2_ on product1_.type_id=producttyp2_.id left outer join xedoc_admin.tbl_users userdomain3_ on product1_.user_id=userdomain3_.id left outer join xedoc_admin.tbl_users userdomain4_ on versiondom0_.user_id=userdomain4_.id where versiondom0_.id=?
12:49:46,586 INFO  [STDOUT] 2009-08-22 12:49:46,586 DEBUG [org.hibernate.SQL] - update xedoc_admin.tbl_products set sap_code=?, nostaw_family=?, nostaw_product=? where id=?
12:49:46,613 INFO  [STDOUT] 2009-08-22 12:49:46,613 DEBUG [org.hibernate.SQL] - update xedoc_admin.tbl_versions set link=?, nostaw_version=? where id=?