April 05
Prof. Ismael H. F. Santos
- ismael@tecgraf.puc-rio.br
2
Spring DAO: Hibernate
nManages Hibernate sessions
nNo more custom ThreadLocal sessions
nSessions are managed within Spring
transaction management
nWorks with JTA if desired
nWorks within EJB container with CMT if
desired
nHibernateTemplate makes common operations
easy
nSimpler, consistent exception handling
nMany operations become one-liners
nLess, simpler, code compared to using
Hibernate alone
nPortability: Switch between Hibernate, JDO
and other transparent persistence
technologies without changing DAO interfaces
nCan even switch to JDBC where transparent
update is not implied
nMixed use of Hibernate and JDBC within the same transaction