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Spring Framework example source code file (JmsTransactionManager.java)
The Spring Framework JmsTransactionManager.java source code/* * Copyright 2002-2007 the original author or authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.springframework.jms.connection; import javax.jms.Connection; import javax.jms.ConnectionFactory; import javax.jms.JMSException; import javax.jms.Session; import javax.jms.TransactionRolledBackException; import org.springframework.beans.factory.InitializingBean; import org.springframework.transaction.CannotCreateTransactionException; import org.springframework.transaction.InvalidIsolationLevelException; import org.springframework.transaction.TransactionDefinition; import org.springframework.transaction.TransactionSystemException; import org.springframework.transaction.UnexpectedRollbackException; import org.springframework.transaction.support.AbstractPlatformTransactionManager; import org.springframework.transaction.support.DefaultTransactionStatus; import org.springframework.transaction.support.ResourceTransactionManager; import org.springframework.transaction.support.SmartTransactionObject; import org.springframework.transaction.support.TransactionSynchronizationManager; /** * {@link org.springframework.transaction.PlatformTransactionManager} implementation * for a single JMS {@link javax.jms.ConnectionFactory}. Binds a JMS * Connection/Session pair from the specified ConnectionFactory to the thread, * potentially allowing for one thread-bound Session per ConnectionFactory. * * <p>NOTE: This class requires a JMS 1.1+ provider because it builds on * the domain-independent API. <b>Use the {@link JmsTransactionManager102} subclass * for a JMS 1.0.2 provider, e.g. when running on a J2EE 1.3 server.</b> * * <p>This local strategy is an alternative to executing JMS operations within * JTA transactions. Its advantage is that it is able to work in any environment, * for example a standalone application or a test suite, with any message broker * as target. However, this strategy is <i>not able to provide XA transactions, * for example in order to share transactions between messaging and database access. * A full JTA/XA setup is required for XA transactions, typically using Spring's * {@link org.springframework.transaction.jta.JtaTransactionManager} as strategy. * * <p>Application code is required to retrieve the transactional JMS Session via * {@link ConnectionFactoryUtils#getTransactionalSession} instead of a standard * J2EE-style {@link ConnectionFactory#createConnection()} call with subsequent * Session creation. Spring's {@link org.springframework.jms.core.JmsTemplate} * will autodetect a thread-bound Session and automatically participate in it. * * <p>Alternatively, you can allow application code to work with the standard * J2EE-style lookup pattern on a ConnectionFactory, for example for legacy code * that is not aware of Spring at all. In that case, define a * {@link TransactionAwareConnectionFactoryProxy} for your target ConnectionFactory, * which will automatically participate in Spring-managed transactions. * * <p>This transaction strategy will typically be used in combination with * {@link SingleConnectionFactory}, which uses a single JMS Connection for all * JMS access in order to avoid the overhead of repeated Connection creation, * typically in a standalone application. Each transaction will then share the * same JMS Connection, while still using its own individual JMS Session. * * <p>Transaction synchronization is turned off by default, as this manager might * be used alongside a datastore-based Spring transaction manager such as the * JDBC {@link org.springframework.jdbc.datasource.DataSourceTransactionManager}, * which has stronger needs for synchronization. * * @author Juergen Hoeller * @since 1.1 * @see ConnectionFactoryUtils#getTransactionalSession * @see TransactionAwareConnectionFactoryProxy * @see org.springframework.jms.core.JmsTemplate */ public class JmsTransactionManager extends AbstractPlatformTransactionManager implements ResourceTransactionManager, InitializingBean { private ConnectionFactory connectionFactory; /** * Create a new JmsTransactionManager for bean-style usage. * <p>Note: The ConnectionFactory has to be set before using the instance. * This constructor can be used to prepare a JmsTemplate via a BeanFactory, * typically setting the ConnectionFactory via setConnectionFactory. * <p>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 #setConnectionFactory * @see #setTransactionSynchronization */ public JmsTransactionManager() { setTransactionSynchronization(SYNCHRONIZATION_NEVER); } /** * Create a new JmsTransactionManager, given a ConnectionFactory. * @param connectionFactory the ConnectionFactory to obtain connections from */ public JmsTransactionManager(ConnectionFactory connectionFactory) { this(); setConnectionFactory(connectionFactory); afterPropertiesSet(); } /** * Set the JMS ConnectionFactory that this instance should manage transactions for. */ public void setConnectionFactory(ConnectionFactory cf) { if (cf instanceof TransactionAwareConnectionFactoryProxy) { // If we got a TransactionAwareConnectionFactoryProxy, we need to perform transactions // for its underlying target ConnectionFactory, else JMS access code won't see // properly exposed transactions (i.e. transactions for the target ConnectionFactory). this.connectionFactory = ((TransactionAwareConnectionFactoryProxy) cf).getTargetConnectionFactory(); } else { this.connectionFactory = cf; } } /** * Return the JMS ConnectionFactory that this instance should manage transactions for. */ public ConnectionFactory getConnectionFactory() { return this.connectionFactory; } /** * Make sure the ConnectionFactory has been set. */ public void afterPropertiesSet() { if (getConnectionFactory() == null) { throw new IllegalArgumentException("Property 'connectionFactory' is required"); } } public Object getResourceFactory() { return getConnectionFactory(); } protected Object doGetTransaction() { JmsTransactionObject txObject = new JmsTransactionObject(); txObject.setResourceHolder( (JmsResourceHolder) TransactionSynchronizationManager.getResource(getConnectionFactory())); return txObject; } protected boolean isExistingTransaction(Object transaction) { JmsTransactionObject txObject = (JmsTransactionObject) transaction; return (txObject.getResourceHolder() != null); } protected void doBegin(Object transaction, TransactionDefinition definition) { if (definition.getIsolationLevel() != TransactionDefinition.ISOLATION_DEFAULT) { throw new InvalidIsolationLevelException("JMS does not support an isolation level concept"); } JmsTransactionObject txObject = (JmsTransactionObject) transaction; Connection con = null; Session session = null; try { con = createConnection(); session = createSession(con); if (logger.isDebugEnabled()) { logger.debug("Created JMS transaction on Session [" + session + "] from Connection [" + con + "]"); } txObject.setResourceHolder(new JmsResourceHolder(getConnectionFactory(), con, session)); txObject.getResourceHolder().setSynchronizedWithTransaction(true); int timeout = determineTimeout(definition); if (timeout != TransactionDefinition.TIMEOUT_DEFAULT) { txObject.getResourceHolder().setTimeoutInSeconds(timeout); } TransactionSynchronizationManager.bindResource( getConnectionFactory(), txObject.getResourceHolder()); } catch (JMSException ex) { if (session != null) { try { session.close(); } catch (Throwable ex2) { // ignore } } if (con != null) { try { con.close(); } catch (Throwable ex2) { // ignore } } throw new CannotCreateTransactionException("Could not create JMS transaction", ex); } } protected Object doSuspend(Object transaction) { JmsTransactionObject txObject = (JmsTransactionObject) transaction; txObject.setResourceHolder(null); return TransactionSynchronizationManager.unbindResource(getConnectionFactory()); } protected void doResume(Object transaction, Object suspendedResources) { JmsResourceHolder conHolder = (JmsResourceHolder) suspendedResources; TransactionSynchronizationManager.bindResource(getConnectionFactory(), conHolder); } protected void doCommit(DefaultTransactionStatus status) { JmsTransactionObject txObject = (JmsTransactionObject) status.getTransaction(); Session session = txObject.getResourceHolder().getSession(); try { if (status.isDebug()) { logger.debug("Committing JMS transaction on Session [" + session + "]"); } session.commit(); } catch (TransactionRolledBackException ex) { throw new UnexpectedRollbackException("JMS transaction rolled back", ex); } catch (JMSException ex) { throw new TransactionSystemException("Could not commit JMS transaction", ex); } } protected void doRollback(DefaultTransactionStatus status) { JmsTransactionObject txObject = (JmsTransactionObject) status.getTransaction(); Session session = txObject.getResourceHolder().getSession(); try { if (status.isDebug()) { logger.debug("Rolling back JMS transaction on Session [" + session + "]"); } session.rollback(); } catch (JMSException ex) { throw new TransactionSystemException("Could not roll back JMS transaction", ex); } } protected void doSetRollbackOnly(DefaultTransactionStatus status) { JmsTransactionObject txObject = (JmsTransactionObject) status.getTransaction(); txObject.getResourceHolder().setRollbackOnly(); } protected void doCleanupAfterCompletion(Object transaction) { JmsTransactionObject txObject = (JmsTransactionObject) transaction; TransactionSynchronizationManager.unbindResource(getConnectionFactory()); txObject.getResourceHolder().closeAll(); txObject.getResourceHolder().clear(); } //------------------------------------------------------------------------- // JMS 1.1 factory methods, potentially overridden for JMS 1.0.2 //------------------------------------------------------------------------- /** * Create a JMS Connection via this template's ConnectionFactory. * <p>This implementation uses JMS 1.1 API. * @return the new JMS Connection * @throws javax.jms.JMSException if thrown by JMS API methods */ protected Connection createConnection() throws JMSException { return getConnectionFactory().createConnection(); } /** * Create a JMS Session for the given Connection. * <p>This implementation uses JMS 1.1 API. * @param con the JMS Connection to create a Session for * @return the new JMS Session * @throws javax.jms.JMSException if thrown by JMS API methods */ protected Session createSession(Connection con) throws JMSException { return con.createSession(true, Session.AUTO_ACKNOWLEDGE); } /** * JMS transaction object, representing a JmsResourceHolder. * Used as transaction object by JmsTransactionManager. * @see JmsResourceHolder */ private static class JmsTransactionObject implements SmartTransactionObject { private JmsResourceHolder resourceHolder; public void setResourceHolder(JmsResourceHolder resourceHolder) { this.resourceHolder = resourceHolder; } public JmsResourceHolder getResourceHolder() { return this.resourceHolder; } public boolean isRollbackOnly() { return this.resourceHolder.isRollbackOnly(); } } } Other Spring Framework examples (source code examples)Here is a short list of links related to this Spring Framework JmsTransactionManager.java source code file: |
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