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 }