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        @Override
028        public void commit(GenericFileOperations<T> operations, GenericFileEndpoint<T> endpoint, Exchange exchange, GenericFile<T> file) throws Exception {
029            // must invoke super
030            super.commit(operations, endpoint, exchange, file);
031    
032            int retries = 3;
033            boolean deleted = false;
034    
035            while (retries > 0 && !deleted) {
036                retries--;
037    
038                if (operations.deleteFile(file.getAbsoluteFilePath())) {
039                    // file is deleted
040                    deleted = true;
041                    break;
042                }
043    
044                // some OS can report false when deleting but the file is still deleted
045                // use exists to check instead
046                boolean exits = operations.existsFile(file.getAbsoluteFilePath());
047                if (!exits) {
048                    deleted = true;
049                } else {
050                    if (log.isTraceEnabled()) {
051                        log.trace("File was not deleted at this attempt will try again in 1 sec.: " + file);
052                    }
053                    // sleep a bit and try again
054                    Thread.sleep(1000);
055                }
056            }
057    
058            if (!deleted) {
059                throw new GenericFileOperationFailedException("Cannot delete file: " + file);
060            }
061        }
062    
063    }