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.builder.ErrorHandlerBuilder;
021    import org.apache.camel.builder.ErrorHandlerBuilderSupport;
022    import org.apache.camel.processor.RedeliveryPolicy;
023    import org.apache.camel.spi.RouteContext;
024    import org.apache.camel.util.ObjectHelper;
025    import org.springframework.beans.factory.InitializingBean;
026    import org.springframework.transaction.support.TransactionTemplate;
027    
028    /**
029     * An error handler which will roll the exception back if there is an error
030     * rather than using the dead letter channel and retry logic.
031     *
032     * A delay is also used after a rollback
033     *
034     * @version $Revision: 1.1 $
035     */
036    public class TransactionErrorHandlerBuilder extends ErrorHandlerBuilderSupport implements Cloneable, InitializingBean {
037    
038        private TransactionTemplate transactionTemplate;
039        private RedeliveryPolicy redeliveryPolicy = new RedeliveryPolicy();
040    
041        public TransactionErrorHandlerBuilder() {
042        }
043    
044        public TransactionTemplate getTransactionTemplate() {
045            return transactionTemplate;
046        }
047    
048        public void setTransactionTemplate(TransactionTemplate transactionTemplate) {
049            this.transactionTemplate = transactionTemplate;
050        }
051    
052        public RedeliveryPolicy getRedeliveryPolicy() {
053            return redeliveryPolicy;
054        }
055    
056        public void setRedeliveryPolicy(RedeliveryPolicy redeliveryPolicy) {
057            this.redeliveryPolicy = redeliveryPolicy;
058        }
059    
060        public ErrorHandlerBuilder copy() {
061            try {
062                return (ErrorHandlerBuilder) clone();
063            } catch (CloneNotSupportedException e) {
064                throw new Error("Clone should be supported: " + e, e);
065            }
066        }
067    
068        public Processor createErrorHandler(RouteContext routeContext, Processor processor) throws Exception {
069            return new TransactionInterceptor(processor, transactionTemplate, redeliveryPolicy);
070        }
071    
072        public void afterPropertiesSet() throws Exception {
073            ObjectHelper.notNull(transactionTemplate, "transactionTemplate");
074        }
075    
076        // Builder methods
077        // -------------------------------------------------------------------------
078        public TransactionErrorHandlerBuilder backOffMultiplier(double backOffMultiplier) {
079            getRedeliveryPolicy().backOffMultiplier(backOffMultiplier);
080            return this;
081        }
082    
083        public TransactionErrorHandlerBuilder collisionAvoidancePercent(short collisionAvoidancePercent) {
084            getRedeliveryPolicy().collisionAvoidancePercent(collisionAvoidancePercent);
085            return this;
086        }
087    
088        public TransactionErrorHandlerBuilder initialRedeliveryDelay(long initialRedeliveryDelay) {
089            getRedeliveryPolicy().initialRedeliveryDelay(initialRedeliveryDelay);
090            return this;
091        }
092    
093        public TransactionErrorHandlerBuilder maximumRedeliveries(int maximumRedeliveries) {
094            getRedeliveryPolicy().maximumRedeliveries(maximumRedeliveries);
095            return this;
096        }
097    
098        public TransactionErrorHandlerBuilder maximumRedeliveryDelay(long maximumRedeliveryDelay) {
099            getRedeliveryPolicy().maximumRedeliveryDelay(maximumRedeliveryDelay);
100            return this;
101        }
102    
103        public TransactionErrorHandlerBuilder useCollisionAvoidance() {
104            getRedeliveryPolicy().useCollisionAvoidance();
105            return this;
106        }
107    
108        public TransactionErrorHandlerBuilder useExponentialBackOff() {
109            getRedeliveryPolicy().useExponentialBackOff();
110            return this;
111        }
112    
113    }