package org.jboss.cache.factories;
import org.jboss.cache.config.ConfigurationException;
import org.jboss.cache.factories.annotations.DefaultFactoryFor;
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@jboss.org">manik@jboss.org</a>)
* @since 2.1.0
*/
@DefaultFactoryFor(classes = {TransactionManager.class})
public class TransactionManagerFactory extends ComponentFactory
{
@Override
@SuppressWarnings("unchecked")
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);
}
}
return (T) transactionManager;
}
}