Overview | Package | Class | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD

## org.springframework.jca.cci.connection
Class TransactionAwareConnectionFactoryProxy

    java.lang.Object
      org.springframework.jca.cci.connection.DelegatingConnectionFactory
          org.springframework.jca.cci.connection.TransactionAwareConnectionFactoryProxy

All Implemented Interfaces:
  Serializable, Referenceable, ConnectionFactory, InitializingBean

    public class TransactionAwareConnectionFactoryProxy

extends DelegatingConnectionFactory

Proxy for a target CCI `ConnectionFactory`, adding awareness of Spring-managed transactions. Similar to a transactional JNDI ConnectionFactory as provided by a J2EE server.

Data access code that should remain unaware of Spring's data access support can work with this proxy to seamlessly participate in Spring-managed transactions. Note that the transaction manager, for example the `CciLocalTransactionManager`, still needs to work with underlying ConnectionFactory, not with this proxy.

Make sure that TransactionAwareConnectionFactoryProxy is the outermost ConnectionFactory of a chain of ConnectionFactory proxies/adapters. TransactionAwareConnectionFactoryProxy can delegate either directly to the target connection pool or to some intermediate proxy/adapter like `ConnectionSpecConnectionFactoryAdapter`.

Delegates to `ConnectionFactoryUtils` for automatically participating in thread-bound transactions, for example managed by `CciLocalTransactionManager`. `getConnection` calls and `close` calls on returned Connections will behave properly within a transaction, i.e. always operate on the transactional Connection. If not within a transaction, normal ConnectionFactory behavior applies.

This proxy allows data access code to work with the plain JCA CCI API and still participate in Spring-managed transactions, similar to CCI code in a J2EE/JTA environment. However, if possible, use Spring's ConnectionFactoryUtils, CciTemplate or CCI operation objects to get transaction participation even without a proxy for the target ConnectionFactory, avoiding the need to define such a proxy in the first place.

NOTE: This ConnectionFactory proxy needs to return wrapped Connections in order to handle close calls properly. Therefore, the returned Connections cannot be cast to a native CCI Connection type or to a connection pool implementation type.

Since:
  1.2
Author:
  Juergen Hoeller
See Also:
  `ConnectionFactory.getConnection()`, `Connection.close()`, `ConnectionFactoryUtils.doGetConnection(javax.resource.cci.ConnectionFactory)`, `ConnectionFactoryUtils.doReleaseConnection(javax.resource.cci.Connection, javax.resource.cci.ConnectionFactory)`, Serialized Form

Constructor Summary
`TransactionAwareConnectionFactoryProxy()` Create a new TransactionAwareConnectionFactoryProxy.
`TransactionAwareConnectionFactoryProxy(ConnectionFactory targetConnectionFactory)` Create a new TransactionAwareConnectionFactoryProxy.

Method Summary
`Connection` | `getConnection()` Delegate to ConnectionFactoryUtils for automatically participating in Spring-managed transactions.
`protected Connection` | `getTransactionAwareConnectionProxy(Connection target, ConnectionFactory cf)` Wrap the given Connection with a proxy that delegates every method call to it but delegates `close` calls to ConnectionFactoryUtils.

Methods inherited from class org.springframework.jca.cci.connection.DelegatingConnectionFactory
`afterPropertiesSet, getConnection, getMetaData, getRecordFactory, getReference, getTargetConnectionFactory, setReference, setTargetConnectionFactory`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### TransactionAwareConnectionFactoryProxy

    public TransactionAwareConnectionFactoryProxy()

  Create a new TransactionAwareConnectionFactoryProxy.

  See Also:
    `DelegatingConnectionFactory.setTargetConnectionFactory(javax.resource.cci.ConnectionFactory)`

### TransactionAwareConnectionFactoryProxy

    public TransactionAwareConnectionFactoryProxy(ConnectionFactory targetConnectionFactory)

  Create a new TransactionAwareConnectionFactoryProxy.

  Parameters:
    `targetConnectionFactory` - the target ConnectionFactory

Method Detail

### getConnection

    public Connection getConnection()
                             throws ResourceException

  Delegate to ConnectionFactoryUtils for automatically participating in Spring-managed transactions. Throws the original ResourceException, if any.

  Specified by:
    `getConnection` in interface `ConnectionFactory`
  Overrides:
    `getConnection` in class `DelegatingConnectionFactory`
  Returns:
    a transactional Connection if any, a new one else
  Throws:
    `ResourceException`
  See Also:
    `ConnectionFactoryUtils.doGetConnection(javax.resource.cci.ConnectionFactory)`

### getTransactionAwareConnectionProxy

    protected Connection getTransactionAwareConnectionProxy(Connection target,
                                                            ConnectionFactory cf)

  Wrap the given Connection with a proxy that delegates every method call to it but delegates `close` calls to ConnectionFactoryUtils.

  Parameters:
    `target` - the original Connection to wrap
    `cf` - ConnectionFactory that the Connection came from
  Returns:
    the wrapped Connection
  See Also:
    `Connection.close()`, `ConnectionFactoryUtils.doReleaseConnection(javax.resource.cci.Connection, javax.resource.cci.ConnectionFactory)`

Overview | Package | Class | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD