package org.apache.ojb.broker.core;
/* Copyright 2003-2005 The Apache Software Foundation
*
* 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.
*/
import org.apache.ojb.broker.OJBRuntimeException;
import org.apache.ojb.broker.util.ClassHelper;
import org.apache.ojb.broker.util.configuration.Configuration;
import org.apache.ojb.broker.util.configuration.Configurator;
import org.apache.ojb.broker.util.configuration.impl.OjbConfigurator;
import org.apache.ojb.broker.util.logging.Logger;
import org.apache.ojb.broker.util.logging.LoggerFactory;
/**
*
* @author Thomas Mahler
* @version $Id: PersistenceBrokerFactoryFactory.java,v 1.4.2.1 2005/12/21 22:25:01 tomdz Exp $
*/
public class PersistenceBrokerFactoryFactory
{
private static Logger log = LoggerFactory.getBootLogger();
private static final String PBF_KEY = "PersistenceBrokerFactoryClass";
private static PersistenceBrokerFactoryIF singleton = init();
/**
* Returns an {@link PersistenceBrokerFactoryIF} instance.
*/
public static PersistenceBrokerFactoryIF instance()
{
return singleton;
}
private static PersistenceBrokerFactoryIF init()
{
if (log.isDebugEnabled()) log.debug("Instantiate PersistenceBrokerFactory");
Class pbfClass = null;
try
{
Configurator configurator = OjbConfigurator.getInstance();
Configuration config = configurator.getConfigurationFor(null);
pbfClass = config.getClass(PBF_KEY, null);
if(pbfClass == null)
{
log.error("Creation of PersistenceBrokerFactory (PBF) instance failed, can't get PBF class object");
throw new OJBRuntimeException("Property for key '" + PBF_KEY + "' can not be found in properties file");
}
PersistenceBrokerFactoryIF result = (PersistenceBrokerFactoryIF) ClassHelper.newInstance(pbfClass);
configurator.configure(result);
log.info("PersistencebrokerFactory class instantiated: " + result);
return result;
}
catch (Exception e)
{
if(e instanceof OJBRuntimeException)
{
throw (OJBRuntimeException) e;
}
else
{
throw new OJBRuntimeException("Error while instantiation of PersistenceBrokerFactory class", e);
}
}
}
}