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.component.file.strategy; 018 019 import org.apache.camel.Exchange; 020 import org.apache.camel.component.file.GenericFile; 021 import org.apache.camel.component.file.GenericFileEndpoint; 022 import org.apache.camel.component.file.GenericFileOperationFailedException; 023 import org.apache.camel.component.file.GenericFileOperations; 024 025 public class GenericFileDeleteProcessStrategy<T> extends GenericFileProcessStrategySupport<T> { 026 027 private GenericFileRenamer<T> failureRenamer; 028 private GenericFileRenamer<T> beginRenamer; 029 030 @Override 031 public boolean begin(GenericFileOperations<T> operations, GenericFileEndpoint<T> endpoint, Exchange exchange, GenericFile<T> file) throws Exception { 032 033 // We need to invoke super, but to the file that we are going to use for processing, so we do super after renaming. 034 GenericFile<T> to = file; 035 036 if (beginRenamer != null) { 037 GenericFile<T> newName = beginRenamer.renameFile(exchange, file); 038 to = renameFile(operations, file, newName); 039 if (to != null) { 040 to.bindToExchange(exchange); 041 } 042 } 043 // must invoke super 044 boolean result = super.begin(operations, endpoint, exchange, to); 045 if (!result) { 046 return false; 047 } 048 049 return true; 050 } 051 052 @Override 053 public void commit(GenericFileOperations<T> operations, GenericFileEndpoint<T> endpoint, Exchange exchange, GenericFile<T> file) throws Exception { 054 // must invoke super 055 super.commit(operations, endpoint, exchange, file); 056 057 int retries = 3; 058 boolean deleted = false; 059 060 while (retries > 0 && !deleted) { 061 retries--; 062 063 if (operations.deleteFile(file.getAbsoluteFilePath())) { 064 // file is deleted 065 deleted = true; 066 break; 067 } 068 069 // some OS can report false when deleting but the file is still deleted 070 // use exists to check instead 071 boolean exits = operations.existsFile(file.getAbsoluteFilePath()); 072 if (!exits) { 073 deleted = true; 074 } else { 075 log.trace("File was not deleted at this attempt will try again in 1 sec.: {}", file); 076 // sleep a bit and try again 077 Thread.sleep(1000); 078 } 079 } 080 081 if (!deleted) { 082 throw new GenericFileOperationFailedException("Cannot delete file: " + file); 083 } 084 } 085 086 @Override 087 public void rollback(GenericFileOperations<T> operations, GenericFileEndpoint<T> endpoint, Exchange exchange, GenericFile<T> file) throws Exception { 088 // must invoke super 089 super.rollback(operations, endpoint, exchange, file); 090 091 // moved the failed file if specifying the moveFailed option 092 if (failureRenamer != null) { 093 // create a copy and bind the file to the exchange to be used by the renamer to evaluate the file name 094 Exchange copy = exchange.copy(); 095 file.bindToExchange(copy); 096 // must preserve message id 097 copy.getIn().setMessageId(exchange.getIn().getMessageId()); 098 copy.setExchangeId(exchange.getExchangeId()); 099 100 GenericFile<T> newName = failureRenamer.renameFile(copy, file); 101 renameFile(operations, file, newName); 102 } 103 } 104 105 public GenericFileRenamer<T> getFailureRenamer() { 106 return failureRenamer; 107 } 108 109 public void setFailureRenamer(GenericFileRenamer<T> failureRenamer) { 110 this.failureRenamer = failureRenamer; 111 } 112 113 public GenericFileRenamer<T> getBeginRenamer() { 114 return beginRenamer; 115 } 116 117 public void setBeginRenamer(GenericFileRenamer<T> beginRenamer) { 118 this.beginRenamer = beginRenamer; 119 } 120 }