001    package org.apache.archiva.transaction;
002    
003    /*
004     * Licensed to the Apache Software Foundation (ASF) under one
005     * or more contributor license agreements.  See the NOTICE file
006     * distributed with this work for additional information
007     * regarding copyright ownership.  The ASF licenses this file
008     * to you under the Apache License, Version 2.0 (the
009     * "License"); you may not use this file except in compliance
010     * with the License.  You may obtain a copy of the License at
011     *
012     *   http://www.apache.org/licenses/LICENSE-2.0
013     *
014     * Unless required by applicable law or agreed to in writing,
015     * software distributed under the License is distributed on an
016     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017     * KIND, either express or implied.  See the License for the
018     * specific language governing permissions and limitations
019     * under the License.
020     */
021    
022    import java.io.File;
023    import java.io.IOException;
024    import java.util.List;
025    
026    import org.codehaus.plexus.digest.Digester;
027    
028    /**
029     * Event for creating a file from a string content.
030     *
031     *
032     */
033    public class CreateFileEvent
034        extends AbstractTransactionEvent
035    {
036        private final File destination;
037    
038        private final String content;
039    
040        /**
041         * 
042         * @param content
043         * @param destination
044         * @param digesters {@link List}<{@link Digester}> digesters to use for checksumming 
045         */
046        public CreateFileEvent( String content, File destination, List<? extends Digester> digesters )
047        {
048            super( digesters );
049            this.content = content;
050            this.destination = destination;
051        }
052    
053        public void commit()
054            throws IOException
055        {
056            createBackup( destination );
057    
058            mkDirs( destination.getParentFile() );
059    
060            if ( !destination.exists() && !destination.createNewFile() )
061            {
062                throw new IOException( "Unable to create new file" );
063            }
064    
065            writeStringToFile( destination, content );
066    
067            createChecksums( destination, true );
068        }
069    
070        public void rollback()
071            throws IOException
072        {
073            destination.delete();
074    
075            revertFilesCreated();
076    
077            revertMkDirs();
078    
079            restoreBackups();
080        }
081    }