org.springframework.jca.cci.connection

Class ConnectionFactoryUtils

java.lang.Object

org.springframework.jca.cci.connection.ConnectionFactoryUtils

public abstract class ConnectionFactoryUtils
extends Object

Helper class that provides static methods for obtaining CCI Connections from a ConnectionFactory. Includes special support for Spring-managed transactional Connections, e.g. managed by CciLocalTransactionManager or JtaTransactionManager.

Used internally by CciTemplate, Spring's CCI operation objects and the CciLocalTransactionManager. Can also be used directly in application code.

Since:

1.2

Author:

Thierry Templier, Juergen Hoeller

See Also:

getConnection(javax.resource.cci.ConnectionFactory), releaseConnection(javax.resource.cci.Connection, javax.resource.cci.ConnectionFactory), CciLocalTransactionManager, JtaTransactionManager, TransactionSynchronizationManager

Constructor Summary

Constructors

Constructor and Description
ConnectionFactoryUtils()

Method Summary

Modifier and Type	Method and Description
static Connection	doGetConnection(ConnectionFactory cf) Actually obtain a CCI Connection from the given ConnectionFactory.
static void	doReleaseConnection(Connection con, ConnectionFactory cf) Actually close the given Connection, obtained from the given ConnectionFactory.
static Connection	getConnection(ConnectionFactory cf) Obtain a Connection from the given ConnectionFactory.
static Connection	getConnection(ConnectionFactory cf, ConnectionSpec spec) Obtain a Connection from the given ConnectionFactory.
static boolean	isConnectionTransactional(Connection con, ConnectionFactory cf) Determine whether the given JCA CCI Connection is transactional, that is, bound to the current thread by Spring's transaction facilities.
static void	releaseConnection(Connection con, ConnectionFactory cf) Close the given Connection, obtained from the given ConnectionFactory, if it is not managed externally (that is, not bound to the thread).

Methods inherited from class java.lang.Object

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

Constructor Detail

ConnectionFactoryUtils

public ConnectionFactoryUtils()

Method Detail

getConnection

public static Connection getConnection(ConnectionFactory cf)
                                throws CannotGetCciConnectionException

Obtain a Connection from the given ConnectionFactory. Translates ResourceExceptions into the Spring hierarchy of unchecked generic data access exceptions, simplifying calling code and making any exception that is thrown more meaningful.

Is aware of a corresponding Connection bound to the current thread, for example when using CciLocalTransactionManager. Will bind a Connection to the thread if transaction synchronization is active (e.g. if in a JTA transaction).

Parameters:

cf - the ConnectionFactory to obtain Connection from

Returns:

a CCI Connection from the given ConnectionFactory

Throws:

CannotGetCciConnectionException - if the attempt to get a Connection failed

See Also:

releaseConnection(javax.resource.cci.Connection, javax.resource.cci.ConnectionFactory)

getConnection

public static Connection getConnection(ConnectionFactory cf,
                                       ConnectionSpec spec)
                                throws CannotGetCciConnectionException

Obtain a Connection from the given ConnectionFactory. Translates ResourceExceptions into the Spring hierarchy of unchecked generic data access exceptions, simplifying calling code and making any exception that is thrown more meaningful.

Is aware of a corresponding Connection bound to the current thread, for example when using CciLocalTransactionManager. Will bind a Connection to the thread if transaction synchronization is active (e.g. if in a JTA transaction).

Parameters:

cf - the ConnectionFactory to obtain Connection from

spec - the ConnectionSpec for the desired Connection (may be null). Note: If this is specified, a new Connection will be obtained for every call, without participating in a shared transactional Connection.

Returns:

a CCI Connection from the given ConnectionFactory

Throws:

CannotGetCciConnectionException - if the attempt to get a Connection failed

See Also:

releaseConnection(javax.resource.cci.Connection, javax.resource.cci.ConnectionFactory)

doGetConnection

public static Connection doGetConnection(ConnectionFactory cf)
                                  throws ResourceException

Actually obtain a CCI Connection from the given ConnectionFactory. Same as getConnection(javax.resource.cci.ConnectionFactory), but throwing the original ResourceException.

Is aware of a corresponding Connection bound to the current thread, for example when using CciLocalTransactionManager. Will bind a Connection to the thread if transaction synchronization is active (e.g. if in a JTA transaction).

Directly accessed by TransactionAwareConnectionFactoryProxy.

Parameters:

cf - the ConnectionFactory to obtain Connection from

Returns:

a CCI Connection from the given ConnectionFactory

Throws:

ResourceException - if thrown by CCI API methods

See Also:

doReleaseConnection(javax.resource.cci.Connection, javax.resource.cci.ConnectionFactory)

isConnectionTransactional

public static boolean isConnectionTransactional(Connection con,
                                                ConnectionFactory cf)

Determine whether the given JCA CCI Connection is transactional, that is, bound to the current thread by Spring's transaction facilities.

Parameters:

con - the Connection to check

cf - the ConnectionFactory that the Connection was obtained from (may be null)

Returns:

whether the Connection is transactional

releaseConnection

public static void releaseConnection(Connection con,
                                     ConnectionFactory cf)

Close the given Connection, obtained from the given ConnectionFactory, if it is not managed externally (that is, not bound to the thread).

Parameters:

con - the Connection to close if necessary (if this is null, the call will be ignored)

cf - the ConnectionFactory that the Connection was obtained from (can be null)

See Also:

getConnection(javax.resource.cci.ConnectionFactory)

doReleaseConnection

public static void doReleaseConnection(Connection con,
                                       ConnectionFactory cf)
                                throws ResourceException

Actually close the given Connection, obtained from the given ConnectionFactory. Same as releaseConnection(javax.resource.cci.Connection, javax.resource.cci.ConnectionFactory), but throwing the original ResourceException.

Directly accessed by TransactionAwareConnectionFactoryProxy.

Parameters:

con - the Connection to close if necessary (if this is null, the call will be ignored)

cf - the ConnectionFactory that the Connection was obtained from (can be null)

Throws:

ResourceException - if thrown by JCA CCI methods

See Also:

doGetConnection(javax.resource.cci.ConnectionFactory)