001    package org.apache.ojb.broker.transaction.tm;
002    
003    /* Copyright 2003-2005 The Apache Software Foundation
004     *
005     * Licensed under the Apache License, Version 2.0 (the "License");
006     * you may not use this file except in compliance with the License.
007     * You may obtain a copy of the License at
008     *
009     *     http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    
018    import org.apache.ojb.broker.util.factory.ConfigurableFactory;
019    import org.apache.ojb.broker.util.logging.Logger;
020    import org.apache.ojb.broker.util.logging.LoggerFactory;
021    import org.apache.ojb.broker.transaction.tm.TransactionManagerFactory;
022    
023    public class TransactionManagerFactoryFactory
024    {
025        private static Logger log = LoggerFactory.getLogger(TransactionManagerFactoryFactory.class);
026        private static TransactionManagerFactory tmInstance;
027        static
028        {
029            try
030            {
031                tmInstance = new TMFactoryFactory().createTransactionManagerFactory();
032            }
033            catch (Exception e)
034            {
035                log.error("Instantiation of TransactionManagerFactory failed", e);
036            }
037        }
038    
039        public synchronized static TransactionManagerFactory instance()
040        {
041            return tmInstance;
042        }
043    
044        public static class TMFactoryFactory extends ConfigurableFactory
045        {
046            protected String getConfigurationKey()
047            {
048                return "JTATransactionManagerClass";
049            }
050    
051            protected TransactionManagerFactory createTransactionManagerFactory()
052            {
053                return (TransactionManagerFactory) this.createNewInstance();
054            }
055        }
056    }