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JDBC Distributed Transaction
Figure 6-5 ABPooledConnection Class
<Interface>
PooledConnection
<Interface>
XAConnection
ABPooled Connection
ABConnection instance returned by getConnection method acts as a temporary handle to the physical connection, and runs like common connection before participating in global transaction. If
ABConnection instance participates in global transaction, auto-commit is specified as false. After
global transaction terminates, auto-commit is restored to its original state prior to occurrence of
global transaction.
Each time an XAConnection instance getConnection method is called, it returns a new connection
instance. It had been returned by the same XAConnection instance and closes any previous connection instance tha still exists. It is advisable to explicitly close any previous connection instance before
opening a new one. Calling the close method of an XAConnection instance closes the physical connection to the database.
XAResource Interface
The TM uses ABXAResource instances to coordinate all the transaction branches. An Altibse.jdbc.driver.ABXAResource instance is an instance of a class that implements the javax.transaction.xa.XAResource interface.
Figure 6-6 ABXAResource Class
<Interface>
javax.transaction .xa.XAResource
ABXAResource
The ALTIBASE JDBC driver creates and returns an ABXAResource instance whenever the ABPooledConnection class getXAResource method is called, and associates an ALTIBASE JDBC driver ABXARe107
XA Interface