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 */ 017package org.apache.camel.component.file; 018 019import java.io.File; 020 021import org.apache.camel.Exchange; 022import org.apache.camel.component.file.strategy.FileMoveExistingStrategy; 023import org.apache.camel.util.FileUtil; 024import org.apache.camel.util.ObjectHelper; 025import org.slf4j.Logger; 026import org.slf4j.LoggerFactory; 027 028public class GenericFileDefaultMoveExistingFileStrategy implements FileMoveExistingStrategy { 029 030 private static final Logger LOG = LoggerFactory.getLogger(GenericFileDefaultMoveExistingFileStrategy.class); 031 032 /** 033 * Moves any existing file due fileExists=Move is in use. 034 */ 035 @Override 036 public boolean moveExistingFile(GenericFileEndpoint endpoint, GenericFileOperations operations, String fileName) 037 throws GenericFileOperationFailedException { 038 039 // need to evaluate using a dummy and simulate the file first, to have access to all the file attributes 040 // create a dummy exchange as Exchange is needed for expression evaluation 041 // we support only the following 3 tokens. 042 Exchange dummy = endpoint.createExchange(); 043 String parent = FileUtil.onlyPath(fileName); 044 String onlyName = FileUtil.stripPath(fileName); 045 dummy.getIn().setHeader(Exchange.FILE_NAME, fileName); 046 dummy.getIn().setHeader(Exchange.FILE_NAME_ONLY, onlyName); 047 dummy.getIn().setHeader(Exchange.FILE_PARENT, parent); 048 049 String to = endpoint.getMoveExisting().evaluate(dummy, String.class); 050 // we must normalize it (to avoid having both \ and / in the name which confuses java.io.File) 051 to = FileUtil.normalizePath(to); 052 if (ObjectHelper.isEmpty(to)) { 053 throw new GenericFileOperationFailedException("moveExisting evaluated as empty String, cannot move existing file: " + fileName); 054 } 055 056 // ensure any paths is created before we rename as the renamed file may be in a different path (which may be non exiting) 057 // use java.io.File to compute the file path 058 File toFile = new File(to); 059 String directory = toFile.getParent(); 060 boolean absolute = FileUtil.isAbsolute(toFile); 061 if (directory != null) { 062 if (!operations.buildDirectory(directory, absolute)) { 063 LOG.debug("Cannot build directory [{}] (could be because of denied permissions)", directory); 064 } 065 } 066 067 // deal if there already exists a file 068 if (operations.existsFile(to)) { 069 if (endpoint.isEagerDeleteTargetFile()) { 070 LOG.trace("Deleting existing file: {}", to); 071 if (!operations.deleteFile(to)) { 072 throw new GenericFileOperationFailedException("Cannot delete file: " + to); 073 } 074 } else { 075 throw new GenericFileOperationFailedException("Cannot move existing file from: " + fileName + " to: " + to + " as there already exists a file: " + to); 076 } 077 } 078 079 LOG.trace("Moving existing file: {} to: {}", fileName, to); 080 if (!operations.renameFile(fileName, to)) { 081 throw new GenericFileOperationFailedException("Cannot rename file from: " + fileName + " to: " + to); 082 } 083 084 return true; 085 } 086 087}