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 java.io.File;
020    import java.io.IOException;
021    
022    import org.apache.camel.component.file.FileEndpoint;
023    import org.apache.camel.component.file.FileExchange;
024    import org.apache.commons.logging.Log;
025    import org.apache.commons.logging.LogFactory;
026    
027    /**
028     * A strategy to rename a file
029     * 
030     * @version $Revision: 51995 $
031     */
032    public class RenameFileProcessStrategy extends FileProcessStrategySupport {
033        private static final transient Log LOG = LogFactory.getLog(RenameFileProcessStrategy.class);
034        private FileRenamer renamer;
035    
036        public RenameFileProcessStrategy() {
037            this(true);
038        }
039    
040        public RenameFileProcessStrategy(boolean lock) {
041            this(lock, ".camel/", "");
042        }
043    
044        public RenameFileProcessStrategy(boolean lock, String namePrefix, String namePostfix) {
045            this(lock, new DefaultFileRenamer(namePrefix, namePostfix));
046        }
047    
048        public RenameFileProcessStrategy(boolean lock, FileRenamer renamer) {
049            super(lock);
050            this.renamer = renamer;
051        }
052    
053        @Override
054        public void commit(FileEndpoint endpoint, FileExchange exchange, File file) throws Exception {
055            File newName = renamer.renameFile(exchange, file);
056            // deleting any existing files before renaming
057            if (newName.exists()) {
058                newName.delete();
059            }
060    
061            // make parent folder if missing
062            newName.getParentFile().mkdirs();
063    
064            if (LOG.isDebugEnabled()) {
065                LOG.debug("Renaming file: " + file + " to: " + newName);
066            }
067            boolean renamed = file.renameTo(newName);
068            if (!renamed) {
069                throw new IOException("Can not rename file from: " + file + " to: " + newName);
070            }
071    
072            // must commit to release the lock
073            super.commit(endpoint, exchange, file);
074        }
075    
076        public FileRenamer getRenamer() {
077            return renamer;
078        }
079    
080        public void setRenamer(FileRenamer renamer) {
081            this.renamer = renamer;
082        }
083    }