org.datanucleus.store.rdbms.datasource.dbcp.managed

Class TransactionRegistry

java.lang.Object

org.datanucleus.store.rdbms.datasource.dbcp.managed.TransactionRegistry

public class TransactionRegistry
extends Object

TransactionRegistry tracks Connections and XAResources in a transacted environment for a single XAConnectionFactory. The TransactionRegistry hides the details of transaction processing from the existing DBCP pooling code, and gives the ManagedConnection a way to enlist connections in a transaction, allowing for the maximal rescue of DBCP.

Version:

$Revision$

Author:

Dain Sundstrom

Constructor Summary

Constructors

Constructor and Description
TransactionRegistry(TransactionManager transactionManager) Creates a TransactionRegistry for the specified transaction manager.

Method Summary

Modifier and Type	Method and Description
TransactionContext	getActiveTransactionContext() Gets the active TransactionContext or null if not Transaction is active.
XAResource	getXAResource(Connection connection) Gets the XAResource registered for the connection.
void	registerConnection(Connection connection, XAResource xaResource) Registers the association between a Connection and a XAResource.
void	unregisterConnection(Connection connection)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TransactionRegistry

public TransactionRegistry(TransactionManager transactionManager)

Creates a TransactionRegistry for the specified transaction manager.

Parameters:

transactionManager - the transaction manager used to enlist connections

Method Detail

registerConnection

public void registerConnection(Connection connection,
                               XAResource xaResource)

Registers the association between a Connection and a XAResource. When a connection is enlisted in a transaction, it is actually the XAResource that is given to the transaction manager.

Parameters:

connection - the JDBC connection

xaResource - the XAResource which managed the connection within a transaction

getXAResource

public XAResource getXAResource(Connection connection)
                         throws SQLException

Gets the XAResource registered for the connection.

Parameters:

connection - the connection

Returns:

the XAResource registered for the connection; never null

Throws:

SQLException - if the connection does not have a registered XAResource

getActiveTransactionContext

public TransactionContext getActiveTransactionContext()
                                               throws SQLException

Gets the active TransactionContext or null if not Transaction is active.

Returns:

the active TransactionContext or null if not Transaction is active

Throws:

SQLException - if an error occurs while fetching the transaction

unregisterConnection

public void unregisterConnection(Connection connection)