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.PlatformTransactionManager;
024    import org.springframework.transaction.support.TransactionTemplate;
025    
026    /**
027     * Wraps the processor in a Spring transaction
028     *
029     * @version $Revision: 674383 $
030     */
031    public class SpringTransactionPolicy<E> implements Policy<E> {
032        private static final transient Log LOG = LogFactory.getLog(SpringTransactionPolicy.class);
033        private TransactionTemplate template;
034        private String propagationBehaviorName;
035        private PlatformTransactionManager transactionManager;
036    
037        /**
038         * Default constructor for easy spring configuration.
039         */
040        public SpringTransactionPolicy() {
041        }
042    
043        public SpringTransactionPolicy(TransactionTemplate template) {
044            this.template = template;
045        }
046    
047        public Processor wrap(Processor processor) {
048            final TransactionTemplate transactionTemplate = getTemplate();
049            if (transactionTemplate == null) {
050                LOG.warn("No TransactionTemplate available so transactions will not be enabled!");
051                return processor;
052            }
053    
054            TransactionInterceptor answer = new TransactionInterceptor(transactionTemplate);
055            answer.setProcessor(processor);
056            return answer;
057        }
058    
059        public TransactionTemplate getTemplate() {
060            if (template == null) {
061                template = new TransactionTemplate(transactionManager);
062                if (propagationBehaviorName != null) {
063                    template.setPropagationBehaviorName(propagationBehaviorName);
064                }
065            }
066            return template;
067        }
068    
069        public void setTemplate(TransactionTemplate template) {
070            this.template = template;
071        }
072    
073        public void setTransactionManager(PlatformTransactionManager transactionManager) {
074            this.transactionManager = transactionManager;
075        }
076    
077        public PlatformTransactionManager getTransactionManager() {
078            return transactionManager;
079        }
080    
081        public void setPropagationBehaviorName(String propagationBehaviorName) {
082            this.propagationBehaviorName = propagationBehaviorName;
083        }
084    
085        public String getPropagationBehaviorName() {
086            return propagationBehaviorName;
087        }
088    
089    }