/*
* JBoss, Home of Professional Open Source.
* Copyright 2000 - 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.cache.factories;
import org.jboss.cache.config.ConfigurationException;
import org.jboss.cache.factories.annotations.DefaultFactoryFor;
import org.jboss.cache.transaction.BatchModeTransactionManager;
import org.jboss.cache.transaction.TransactionManagerLookup;
import javax.transaction.TransactionManager;
/**
* Uses a number of mechanisms to retrieve a transaction manager.
*
* @author Manik Surtani (<a href="mailto:manik AT jboss DOT org">manik AT jboss DOT org</a>)
* @since 2.1.0
*/
@DefaultFactoryFor(classes = {TransactionManager.class})
public class TransactionManagerFactory extends ComponentFactory
{
protected <T> T construct(Class<T> componentType)
{
// See if we had a TransactionManager injected into our config
TransactionManager transactionManager = configuration.getRuntimeConfig().getTransactionManager();
TransactionManagerLookup lookup = null;
if (transactionManager == null)
{
// Nope. See if we can look it up from JNDI
if (configuration.getTransactionManagerLookupClass() != null)
{
try
{
ClassLoader cl = Thread.currentThread().getContextClassLoader();
if (cl == null) cl = getClass().getClassLoader();
Class clazz = cl.loadClass(configuration.getTransactionManagerLookupClass());
lookup = (TransactionManagerLookup) clazz.newInstance();
}
catch (Exception e)
{
throw new ConfigurationException("Problems looking up transaction manager", e);
}
}
try
{
if (lookup != null)
{
transactionManager = lookup.getTransactionManager();
configuration.getRuntimeConfig().setTransactionManager(transactionManager);
}
}
catch (Exception e)
{
log.info("failed looking up TransactionManager, will not use transactions", e);
}
}
if (transactionManager == null && configuration.isInvocationBatchingEnabled())
{
log.info("Using a batchMode transaction manager");
transactionManager = BatchModeTransactionManager.getInstance();
}
return componentType.cast(transactionManager);
}
}