001/* 002 * Syncany, www.syncany.org 003 * Copyright (C) 2011-2016 Philipp C. Heckel <philipp.heckel@gmail.com> 004 * 005 * This program is free software: you can redistribute it and/or modify 006 * it under the terms of the GNU General Public License as published by 007 * the Free Software Foundation, either version 3 of the License, or 008 * (at your option) any later version. 009 * 010 * This program is distributed in the hope that it will be useful, 011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 013 * GNU General Public License for more details. 014 * 015 * You should have received a copy of the GNU General Public License 016 * along with this program. If not, see <http://www.gnu.org/licenses/>. 017 */ 018package org.syncany.plugins.transfer.features; 019 020import org.syncany.plugins.transfer.StorageException; 021import org.syncany.plugins.transfer.TransferManager; 022import org.syncany.plugins.transfer.files.RemoteFile; 023 024/** 025 * The read write consistent feature extension must be defined in the {@link ReadAfterWriteConsistent} 026 * feature in order to extend a {@link TransferManager} that was marked as 'read write consistent' 027 * with the required methods to verify if a file exists on the remote side. 028 * 029 * @author Christian Roth (christian.roth@port17.de) 030 */ 031public interface ReadAfterWriteConsistentFeatureExtension extends FeatureExtension { 032 /** 033 * Check if a file on the remote side already exists. 034 * 035 * @param remoteFile The file to look up 036 * @return True if the file exists and is accessible and false otherwise 037 * @throws StorageException Thrown if an error occurred 038 */ 039 boolean exists(RemoteFile remoteFile) throws StorageException; 040}