HP Integrity NonStop J-Series - Manual (Page 112)

1. Define a JTA user transaction.
javax.transaction.UserTransaction tx = null;
2. Initialize the user transaction.
tx = com.tandem.jta.JTAFactory.getUserTransaction();
3. Begin the transaction.
tx.begin();
4. Commit or rollback the transaction depending upon the status of the operations performed.
tx.commit();
or
tx.rollback();
Configurations using JDBC
To use JDBC Transaction Manager, complete the following steps:
1. Open the session.
Session session = factory.openSession();
2. Initialize the user transaction.
Transaction tx = null;
3. Begin the transaction.
tx = session.beginTransaction();
4. Perform the database operation.
session.load(...);
session.persist(...);
5. Commit or rollback the transaction depending upon the status of the operations performed.
tx.commit();
or
tx.rollback();
Connection Pooling
Connection Pooling is a cache of database connections maintained in the memory so that the
database connections can be reused when the database receives any future requests for data. In
this case, whenever a database operation needs to be performed, a request for an existing database
connection is made to a pool or any object that holds the existing database connections. After that
particular database operation is completed, the connection is returned to the pool.
Hibernate uses the following methods for connection pooling:
•
Connection pooling using C3P0
•
Connection pooling using Proxool
•
Using JNDI datasource with C3P0 connection pooling
To establish the connection, you must set the following properties in the Hibernate configuration (
hibernate.cfg.xml
) file.
NOTE: The example values shown in the tables are for indicative purposes only.
112 Hibernate Framework