org.springframework.jms.connection

Class TransactionAwareConnectionFactoryProxy

java.lang.Object

org.springframework.jms.connection.TransactionAwareConnectionFactoryProxy

public class TransactionAwareConnectionFactoryProxy
extends java.lang.Object

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

Messaging code which should remain unaware of Spring's JMS support can work with this proxy to seamlessly participate in Spring-managed transactions. Note that the transaction manager, for example JmsTransactionManager, still needs to work with the 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 factory or to some intermediary adapter like UserCredentialsConnectionFactoryAdapter.

Delegates to ConnectionFactoryUtils for automatically participating in thread-bound transactions, for example managed by JmsTransactionManager. createSession calls and close calls on returned Sessions will behave properly within a transaction, that is, always work on the transactional Session. If not within a transaction, normal ConnectionFactory behavior applies.

Note that transactional JMS Sessions will be registered on a per-Connection basis. To share the same JMS Session across a transaction, make sure that you operate on the same JMS Connection handle - either through reusing the handle or through configuring a SingleConnectionFactory underneath.

Returned transactional Session proxies will implement the SessionProxy interface to allow for access to the underlying target Session. This is only intended for accessing vendor-specific Session API or for testing purposes (e.g. to perform manual transaction control). For typical application purposes, simply use the standard JMS Session interface.

Since:

2.0

Author:

Juergen Hoeller

See Also:

UserCredentialsConnectionFactoryAdapter, SingleConnectionFactory

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	TransactionAwareConnectionFactoryProxy.CloseSuppressingSessionInvocationHandler Invocation handler that suppresses close calls for a transactional JMS Session.
private class	TransactionAwareConnectionFactoryProxy.TransactionAwareConnectionInvocationHandler Invocation handler that exposes transactional Sessions for the underlying Connection.

Field Summary

Fields

Modifier and Type	Field and Description
private boolean	synchedLocalTransactionAllowed
private ConnectionFactory	targetConnectionFactory

Constructor Summary

Constructors

Constructor and Description
TransactionAwareConnectionFactoryProxy() Create a new TransactionAwareConnectionFactoryProxy.
TransactionAwareConnectionFactoryProxy(ConnectionFactory targetConnectionFactory) Create a new TransactionAwareConnectionFactoryProxy.

Method Summary

Modifier and Type	Method and Description
Connection	createConnection()
Connection	createConnection(java.lang.String username, java.lang.String password)
QueueConnection	createQueueConnection()
QueueConnection	createQueueConnection(java.lang.String username, java.lang.String password)
TopicConnection	createTopicConnection()
TopicConnection	createTopicConnection(java.lang.String username, java.lang.String password)
protected ConnectionFactory	getTargetConnectionFactory() Return the target ConnectionFactory that this ConnectionFactory should delegate to.
protected Connection	getTransactionAwareConnectionProxy(Connection target) Wrap the given Connection with a proxy that delegates every method call to it but handles Session lookup in a transaction-aware fashion.
protected boolean	isSynchedLocalTransactionAllowed() Return whether to allow for a local JMS transaction that is synchronized with a Spring-managed transaction.
void	setSynchedLocalTransactionAllowed(boolean synchedLocalTransactionAllowed) Set whether to allow for a local JMS transaction that is synchronized with a Spring-managed transaction (where the main transaction might be a JDBC-based one for a specific DataSource, for example), with the JMS transaction committing right after the main transaction.
void	setTargetConnectionFactory(ConnectionFactory targetConnectionFactory) Set the target ConnectionFactory that this ConnectionFactory should delegate to.

Methods inherited from class java.lang.Object

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

Field Detail

synchedLocalTransactionAllowed

private boolean synchedLocalTransactionAllowed

targetConnectionFactory

private ConnectionFactory targetConnectionFactory

Constructor Detail

TransactionAwareConnectionFactoryProxy

public TransactionAwareConnectionFactoryProxy()

Create a new TransactionAwareConnectionFactoryProxy.

TransactionAwareConnectionFactoryProxy

public TransactionAwareConnectionFactoryProxy(ConnectionFactory targetConnectionFactory)

Create a new TransactionAwareConnectionFactoryProxy.

Parameters:

targetConnectionFactory - the target ConnectionFactory

Method Detail

setTargetConnectionFactory

public final void setTargetConnectionFactory(ConnectionFactory targetConnectionFactory)

Set the target ConnectionFactory that this ConnectionFactory should delegate to.

getTargetConnectionFactory

protected ConnectionFactory getTargetConnectionFactory()

Return the target ConnectionFactory that this ConnectionFactory should delegate to.

setSynchedLocalTransactionAllowed

public void setSynchedLocalTransactionAllowed(boolean synchedLocalTransactionAllowed)

Set whether to allow for a local JMS transaction that is synchronized with a Spring-managed transaction (where the main transaction might be a JDBC-based one for a specific DataSource, for example), with the JMS transaction committing right after the main transaction. If not allowed, the given ConnectionFactory needs to handle transaction enlistment underneath the covers.

Default is "false": If not within a managed transaction that encompasses the underlying JMS ConnectionFactory, standard Sessions will be returned. Turn this flag on to allow participation in any Spring-managed transaction, with a local JMS transaction synchronized with the main transaction.

isSynchedLocalTransactionAllowed

protected boolean isSynchedLocalTransactionAllowed()

Return whether to allow for a local JMS transaction that is synchronized with a Spring-managed transaction.

createConnection

public Connection createConnection()
                            throws JMSException

Throws:

JMSException

createConnection

public Connection createConnection(java.lang.String username,
                                   java.lang.String password)
                            throws JMSException

Throws:

JMSException

createQueueConnection

public QueueConnection createQueueConnection()
                                      throws JMSException

Throws:

JMSException

createQueueConnection

public QueueConnection createQueueConnection(java.lang.String username,
                                             java.lang.String password)
                                      throws JMSException

Throws:

JMSException

createTopicConnection

public TopicConnection createTopicConnection()
                                      throws JMSException

Throws:

JMSException

createTopicConnection

public TopicConnection createTopicConnection(java.lang.String username,
                                             java.lang.String password)
                                      throws JMSException

Throws:

JMSException

getTransactionAwareConnectionProxy

protected Connection getTransactionAwareConnectionProxy(Connection target)

Wrap the given Connection with a proxy that delegates every method call to it but handles Session lookup in a transaction-aware fashion.

Parameters:

target - the original Connection to wrap

Returns:

the wrapped Connection