| package org.apache.archiva.transaction; |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.codehaus.plexus.digest.Digester; |
| |
| /** |
| * Implement commit/rollback semantics for a set of files. |
| * |
| */ |
| public class FileTransaction |
| { |
| private List<AbstractTransactionEvent> events = new ArrayList<>(); |
| |
| public void commit() |
| throws TransactionException |
| { |
| List<TransactionEvent> toRollback = new ArrayList<TransactionEvent>( events.size() ); |
| |
| for ( TransactionEvent event : events ) |
| { |
| try |
| { |
| event.commit(); |
| |
| toRollback.add( event ); |
| } |
| catch ( IOException e ) |
| { |
| try |
| { |
| rollback( toRollback ); |
| |
| throw new TransactionException( "Unable to commit file transaction", e ); |
| } |
| catch ( IOException ioe ) |
| { |
| throw new TransactionException( |
| "Unable to commit file transaction, and rollback failed with error: '" + ioe.getMessage() + "'", |
| e ); |
| } |
| } |
| } |
| } |
| |
| private void rollback( List<TransactionEvent> toRollback ) |
| throws IOException |
| { |
| for ( TransactionEvent event : toRollback ) |
| { |
| event.rollback(); |
| } |
| } |
| |
| /** |
| * @param source |
| * @param destination |
| * @param digesters {@link List}<{@link org.codehaus.plexus.digest.Digester}> digesters to use for checksumming |
| */ |
| public void copyFile( File source, File destination, List<? extends Digester> digesters ) |
| { |
| events.add( new CopyFileEvent( source, destination, digesters ) ); |
| } |
| |
| /** |
| * @param content |
| * @param destination |
| * @param digesters {@link List}<{@link org.codehaus.plexus.digest.Digester}> digesters to use for checksumming |
| */ |
| public void createFile( String content, File destination, List<? extends Digester> digesters ) |
| { |
| events.add( new CreateFileEvent( content, destination, digesters ) ); |
| } |
| } |