/*
* Copyright 2005 Ralf Joachim
*
* 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.castor.transactionmanager;
import java.lang.reflect.Method;
import java.util.Properties;
import javax.transaction.TransactionManager;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* An abstract factory for acquiring transactions from this J2EE container.
*
* @author <a href="mailto:ralf DOT joachim AT syscon DOT eu">Ralf Joachim</a>
* @version $Revision$ $Date: 2006-04-13 10:49:49 -0600 (Thu, 13 Apr 2006) $
* @since 1.0
*/
public abstract class AbstractTransactionManagerFactory
implements TransactionManagerFactory {
//--------------------------------------------------------------------------
/** The <a href="http://jakarta.apache.org/commons/logging/">Jakarta
* Commons Logging</a> instance used for all logging. */
private static final Log LOG = LogFactory.getLog(
AbstractTransactionManagerFactory.class);
//--------------------------------------------------------------------------
/**
* Get name of the factory class.
*
* @return Name of the factory class.
*/
public abstract String getFactoryClassName();
/**
* Get name of the factory method.
*
* @return Name of the factory method.
*/
public abstract String getFactoryMethodName();
/**
* {@inheritDoc}
* @see org.castor.transactionmanager.TransactionManagerFactory#getTransactionManager(
* java.util.Properties)
*/
public final TransactionManager getTransactionManager(final Properties properties)
throws TransactionManagerAcquireException {
TransactionManager transactionManager;
try {
Class<?> factory = Class.forName(getFactoryClassName());
Method method = factory.getMethod(getFactoryMethodName());
Object obj = method.invoke(factory, (Object[]) null);
transactionManager = (TransactionManager) obj;
} catch (Exception ex) {
String msg = "Unable to acquire instance of "
+ "javax.transaction.TransactionManager: " + getName();
LOG.error(msg);
throw new TransactionManagerAcquireException(msg, ex);
}
if (transactionManager == null) {
String msg = "Unable to acquire instance of "
+ "javax.transaction.TransactionManager: " + getName();
LOG.error(msg);
throw new TransactionManagerAcquireException(msg);
}
return transactionManager;
}
//--------------------------------------------------------------------------
}