001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  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    package org.apache.camel.spring.spi;
018    
019    import org.apache.camel.Processor;
020    import org.apache.camel.spi.Policy;
021    import org.apache.commons.logging.Log;
022    import org.apache.commons.logging.LogFactory;
023    import org.springframework.transaction.support.TransactionTemplate;
024    
025    /**
026     * Wraps the processor in a Spring transaction
027     *
028     * @version $Revision: 630591 $
029     */
030    public class SpringTransactionPolicy<E> implements Policy<E> {
031        private static final transient Log LOG = LogFactory.getLog(SpringTransactionPolicy.class);
032        private TransactionTemplate template;
033    
034        public SpringTransactionPolicy(TransactionTemplate template) {
035            this.template = template;
036        }
037    
038        public Processor wrap(Processor processor) {
039            final TransactionTemplate transactionTemplate = getTemplate();
040            if (transactionTemplate == null) {
041                LOG.warn("No TransactionTemplate available so transactions will not be enabled!");
042                return processor;
043            }
044    
045            TransactionInterceptor answer = new TransactionInterceptor(transactionTemplate);
046            answer.setProcessor(processor);
047            return answer;
048        }
049    
050        public TransactionTemplate getTemplate() {
051            return template;
052        }
053    
054        public void setTemplate(TransactionTemplate template) {
055            this.template = template;
056        }
057    }