Transactional Capabilities in Oracle9iAS Containers for J2EE (OC4J)

1. Declarative Transaction - Sample Code Snippet

<ejb-jar>
  <enterprise-beans>

    <session>
       <ejb-name>HotelInformationHome</ejb-name>
       <home>HotelInformationHome</home>
       <remote>HotelInformation</remote>
       <ejb-class>HotelInformationBean</ejb-class>

       <session-type>Stateless</session-type>
       transaction-type>Container</transaction-type>
    </session>
  </enterprise-beans>
</ejb-jar> 

2. Programmatic Transaction - Sample Code Snippet

javax.transaction.UserTransaction userTransaction=m_ctx.getUserTransaction();
try{
  userTransaction.begin();
  ...........................

  .........................       // Bussiness Logic
  userTransaction.commit();
}catch(Exception e){
  if(userTransaction!=null) userTransaction.rollback();
    throw e;
} 

3. Transactional Attribute - Sample Code Snippet

<ejb-jar>
  <assembly-descriptor>
    <container-transaction>
      <method>
        <ejb-name>ReservationAgentHome</ejb-name>
        <method-name>*</method-name>
      </method>
      <trans-attribute>Supports</trans-attribute>

    </container-transaction>
  </assembly-descriptor>
</ejb-jar>