Package org.springframework.amqp.rabbit.transaction

Class RabbitTransactionManager

java.lang.Object

org.springframework.transaction.support.AbstractPlatformTransactionManager

org.springframework.amqp.rabbit.transaction.RabbitTransactionManager

All Implemented Interfaces:

Serializable, InitializingBean, PlatformTransactionManager, ResourceTransactionManager, TransactionManager

public class RabbitTransactionManager
extends AbstractPlatformTransactionManager
implements ResourceTransactionManager, InitializingBean

PlatformTransactionManager implementation for a single Rabbit ConnectionFactory. Binds a Rabbit Channel from the specified ConnectionFactory to the thread, potentially allowing for one thread-bound channel per ConnectionFactory.

This local strategy is an alternative to executing Rabbit operations within, and synchronized with, external transactions. This strategy is not able to provide XA transactions, for example in order to share transactions between messaging and database access.

Application code is required to retrieve the transactional Rabbit resources via ConnectionFactoryUtils.getTransactionalResourceHolder(ConnectionFactory, boolean) instead of a standard Connection.createChannel(boolean) call with subsequent Channel creation. Spring's RabbitTemplate will autodetect a thread-bound Channel and automatically participate in it.

The use of CachingConnectionFactory as a target for this transaction manager is strongly recommended. CachingConnectionFactory uses a single Rabbit Connection for all Rabbit access in order to avoid the overhead of repeated Connection creation, as well as maintaining a cache of Channels. Each transaction will then share the same Rabbit Connection, while still using its own individual Rabbit Channel.

Transaction synchronization is turned off by default, as this manager might be used alongside a datastore-based Spring transaction manager such as the JDBC org.springframework.jdbc.datasource.DataSourceTransactionManager, which has stronger needs for synchronization.

Author:

Dave Syer

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.springframework.transaction.support.AbstractPlatformTransactionManager

AbstractPlatformTransactionManager.SuspendedResourcesHolder

Field Summary

Fields inherited from class org.springframework.transaction.support.AbstractPlatformTransactionManager

logger, SYNCHRONIZATION_ALWAYS, SYNCHRONIZATION_NEVER, SYNCHRONIZATION_ON_ACTUAL_TRANSACTION

Constructor Summary

Constructors

Constructor	Description
RabbitTransactionManager()	Create a new RabbitTransactionManager for bean-style usage.
RabbitTransactionManager(ConnectionFactory connectionFactory)	Create a new RabbitTransactionManager, given a ConnectionFactory.

Method Summary

Modifier and Type	Method	Description
void	afterPropertiesSet()	Make sure the ConnectionFactory has been set.
protected void	doBegin(Object transaction, TransactionDefinition definition)
protected void	doCleanupAfterCompletion(Object transaction)
protected void	doCommit(DefaultTransactionStatus status)
protected Object	doGetTransaction()
protected void	doResume(Object transaction, Object suspendedResources)
protected void	doRollback(DefaultTransactionStatus status)
protected void	doSetRollbackOnly(DefaultTransactionStatus status)
protected Object	doSuspend(Object transaction)
ConnectionFactory	getConnectionFactory()
Object	getResourceFactory()
protected boolean	isExistingTransaction(Object transaction)
void	setConnectionFactory(ConnectionFactory connectionFactory)

Methods inherited from class org.springframework.transaction.support.AbstractPlatformTransactionManager

commit, determineTimeout, getDefaultTimeout, getTransaction, getTransactionSynchronization, invokeAfterCompletion, isFailEarlyOnGlobalRollbackOnly, isGlobalRollbackOnParticipationFailure, isNestedTransactionAllowed, isRollbackOnCommitFailure, isValidateExistingTransaction, newTransactionStatus, prepareForCommit, prepareSynchronization, prepareTransactionStatus, registerAfterCompletionWithExistingTransaction, resume, rollback, setDefaultTimeout, setFailEarlyOnGlobalRollbackOnly, setGlobalRollbackOnParticipationFailure, setNestedTransactionAllowed, setRollbackOnCommitFailure, setTransactionSynchronization, setTransactionSynchronizationName, setValidateExistingTransaction, shouldCommitOnGlobalRollbackOnly, suspend, triggerBeforeCommit, triggerBeforeCompletion, useSavepointForNestedTransaction

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.springframework.transaction.PlatformTransactionManager

commit, getTransaction, rollback

Constructor Details

RabbitTransactionManager

public RabbitTransactionManager()

Create a new RabbitTransactionManager for bean-style usage.

Note: The ConnectionFactory has to be set before using the instance. This constructor can be used to prepare a RabbitTemplate via a BeanFactory, typically setting the ConnectionFactory via setConnectionFactory.

Turns off transaction synchronization by default, as this manager might be used alongside a datastore-based Spring transaction manager like DataSourceTransactionManager, which has stronger needs for synchronization. Only one manager is allowed to drive synchronization at any point of time.

See Also:

• setConnectionFactory(org.springframework.amqp.rabbit.connection.ConnectionFactory)
• AbstractPlatformTransactionManager.setTransactionSynchronization(int)

RabbitTransactionManager

public RabbitTransactionManager(ConnectionFactory connectionFactory)

Create a new RabbitTransactionManager, given a ConnectionFactory.

Parameters:

connectionFactory - the ConnectionFactory to use

Method Details

setConnectionFactory

public void setConnectionFactory(ConnectionFactory connectionFactory)

Parameters:

connectionFactory - the connectionFactory to set

getConnectionFactory

public ConnectionFactory getConnectionFactory()

Returns:

the connectionFactory

afterPropertiesSet

public void afterPropertiesSet()

Make sure the ConnectionFactory has been set.

Specified by:

afterPropertiesSet in interface InitializingBean

getResourceFactory

public Object getResourceFactory()

Specified by:

getResourceFactory in interface ResourceTransactionManager

doGetTransaction

protected Object doGetTransaction()

Specified by:

doGetTransaction in class AbstractPlatformTransactionManager

isExistingTransaction

protected boolean isExistingTransaction(Object transaction)

Overrides:

isExistingTransaction in class AbstractPlatformTransactionManager

doBegin

protected void doBegin(Object transaction,
 TransactionDefinition definition)

Specified by:

doBegin in class AbstractPlatformTransactionManager

doSuspend

protected Object doSuspend(Object transaction)

Overrides:

doSuspend in class AbstractPlatformTransactionManager

doResume

protected void doResume(Object transaction,
 Object suspendedResources)

Overrides:

doResume in class AbstractPlatformTransactionManager

doCommit

protected void doCommit(DefaultTransactionStatus status)

Specified by:

doCommit in class AbstractPlatformTransactionManager

doRollback

protected void doRollback(DefaultTransactionStatus status)

Specified by:

doRollback in class AbstractPlatformTransactionManager

doSetRollbackOnly

protected void doSetRollbackOnly(DefaultTransactionStatus status)

Overrides:

doSetRollbackOnly in class AbstractPlatformTransactionManager

doCleanupAfterCompletion

protected void doCleanupAfterCompletion(Object transaction)

Overrides:

doCleanupAfterCompletion in class AbstractPlatformTransactionManager