/*
* Syncany, www.syncany.org
* Copyright (C) 2011-2014 Philipp C. Heckel <philipp.heckel@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.syncany.plugins.local;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.apache.commons.io.FileUtils;
import org.syncany.config.Config;
import org.syncany.plugins.transfer.AbstractTransferManager;
import org.syncany.plugins.transfer.StorageException;
import org.syncany.plugins.transfer.StorageFileNotFoundException;
import org.syncany.plugins.transfer.StorageMoveException;
import org.syncany.plugins.transfer.TransferManager;
import org.syncany.plugins.transfer.files.ActionRemoteFile;
import org.syncany.plugins.transfer.files.DatabaseRemoteFile;
import org.syncany.plugins.transfer.files.MultichunkRemoteFile;
import org.syncany.plugins.transfer.files.RemoteFile;
import org.syncany.plugins.transfer.files.SyncanyRemoteFile;
import org.syncany.plugins.transfer.files.TempRemoteFile;
import org.syncany.plugins.transfer.files.TransactionRemoteFile;
/**
* Implements a {@link TransferManager} based on a local storage backend for the
* {@link LocalTransferPlugin}.
*
* <p>Using a {@link LocalTransferSettings}, the transfer manager is configured and uses
* any local folder to store the Syncany repository data. While repo and
* master file are stored in the given folder, databases and multichunks are stored
* in special sub-folders:
*
* <ul>
* <li>The <tt>databases</tt> folder keeps all the {@link DatabaseRemoteFile}s</li>
* <li>The <tt>multichunks</tt> folder keeps the actual data within the {@link MultichunkRemoteFile}s</li>
* </ul>
*
* <p>This plugin can be used for testing or to point to a repository
* on a mounted remote device or network storage such as an NFS or a
* Samba/NetBIOS share.
*
* @author Philipp C. Heckel <philipp.heckel@gmail.com>
*/
public class LocalTransferManager extends AbstractTransferManager {
private static final Logger logger = Logger.getLogger(LocalTransferManager.class.getSimpleName());
private File repoPath;
private File multichunksPath;
private File databasesPath;
private File actionsPath;
private File transactionsPath;
private File temporaryPath;
public LocalTransferManager(LocalTransferSettings connection, Config config) {
super(connection, config);
this.repoPath = connection.getPath().getAbsoluteFile(); // absolute file to get abs. path!
this.multichunksPath = new File(connection.getPath().getAbsolutePath(), "multichunks");
this.databasesPath = new File(connection.getPath().getAbsolutePath(), "databases");
this.actionsPath = new File(connection.getPath().getAbsolutePath(), "actions");
this.transactionsPath = new File(connection.getPath().getAbsolutePath(), "transactions");
this.temporaryPath = new File(connection.getPath().getAbsolutePath(), "temporary");
}
@Override
public void connect() throws StorageException {
if (repoPath == null) {
throw new StorageException("Repository folder '" + repoPath + "' does not exist or is not writable.");
}
}
@Override
public void disconnect() throws StorageException {
// Nothing.
}
@Override
public void init(boolean createIfRequired) throws StorageException {
connect();
if (!testTargetExists() && createIfRequired) {
if (!repoPath.mkdir()) {
throw new StorageException("Cannot create repository directory: " + repoPath);
}
}
if (!multichunksPath.mkdir()) {
throw new StorageException("Cannot create multichunk directory: " + multichunksPath);
}
if (!databasesPath.mkdir()) {
throw new StorageException("Cannot create databases directory: " + databasesPath);
}
if (!actionsPath.mkdir()) {
throw new StorageException("Cannot create actions directory: " + actionsPath);
}
if (!transactionsPath.mkdir()) {
throw new StorageException("Cannot create transactions directory: " + transactionsPath);
}
if (!temporaryPath.mkdir()) {
throw new StorageException("Cannot create temporary directory: " + temporaryPath);
}
}
@Override
public void download(RemoteFile remoteFile, File localFile) throws StorageException {
connect();
File repoFile = getRemoteFile(remoteFile);
if (!repoFile.exists()) {
throw new StorageFileNotFoundException("No such file in local repository: " + repoFile);
}
try {
File tempLocalFile = createTempFile("local-tm-download");
tempLocalFile.deleteOnExit();
FileUtils.copyFile(repoFile, tempLocalFile);
localFile.delete();
FileUtils.moveFile(tempLocalFile, localFile);
tempLocalFile.delete();
}
catch (IOException ex) {
throw new StorageException("Unable to copy file " + repoFile + " from local repository to " + localFile, ex);
}
}
@Override
public void move(RemoteFile sourceFile, RemoteFile targetFile) throws StorageException {
connect();
File sourceRemoteFile = getRemoteFile(sourceFile);
File targetRemoteFile = getRemoteFile(targetFile);
if (!sourceRemoteFile.exists()) {
throw new StorageMoveException("Unable to move file " + sourceFile + " because it does not exist.");
}
try {
FileUtils.moveFile(sourceRemoteFile, targetRemoteFile);
}
catch (IOException ex) {
throw new StorageException("Unable to move file " + sourceRemoteFile + " to destination " + targetRemoteFile, ex);
}
}
@Override
public void upload(File localFile, RemoteFile remoteFile) throws StorageException {
connect();
File repoFile = getRemoteFile(remoteFile);
File tempRepoFile = new File(getAbsoluteParentDirectory(repoFile) + File.separator + ".temp-" + repoFile.getName());
// Do not overwrite files with same size!
if (repoFile.exists() && repoFile.length() == localFile.length()) {
return;
}
// No such local file
if (!localFile.exists()) {
throw new StorageException("No such file on local disk: " + localFile);
}
try {
FileUtils.copyFile(localFile, tempRepoFile);
FileUtils.moveFile(tempRepoFile, repoFile);
}
catch (IOException ex) {
throw new StorageException("Unable to copy file " + localFile + " to local repository " + repoFile, ex);
}
}
@Override
public boolean delete(RemoteFile remoteFile) throws StorageException {
connect();
File repoFile = getRemoteFile(remoteFile);
if (!repoFile.exists()) {
return true;
}
return repoFile.delete();
}
@Override
public <T extends RemoteFile> Map<String, T> list(Class<T> remoteFileClass) throws StorageException {
connect();
// List folder
File remoteFilePath = getRemoteFilePath(remoteFileClass);
File[] files = remoteFilePath.listFiles();
if (files == null) {
logger.log(Level.FINE, remoteFilePath.getAbsolutePath());
throw new StorageException("Unable to read local respository " + repoPath);
}
// Create RemoteFile objects
Map<String, T> remoteFiles = new HashMap<String, T>();
for (File file : files) {
try {
T remoteFile = RemoteFile.createRemoteFile(file.getName(), remoteFileClass);
remoteFiles.put(file.getName(), remoteFile);
}
catch (Exception e) {
logger.log(Level.INFO, "Cannot create instance of " + remoteFileClass.getSimpleName() + " for file " + file
+ "; maybe invalid file name pattern. Ignoring file.");
}
}
return remoteFiles;
}
private File getRemoteFile(RemoteFile remoteFile) {
return new File(getRemoteFilePath(remoteFile.getClass()), remoteFile.getName());
}
private File getRemoteFilePath(Class<? extends RemoteFile> remoteFile) {
if (remoteFile.equals(MultichunkRemoteFile.class)) {
return multichunksPath;
}
else if (remoteFile.equals(DatabaseRemoteFile.class)) {
return databasesPath;
}
else if (remoteFile.equals(ActionRemoteFile.class)) {
return actionsPath;
}
else if (remoteFile.equals(TransactionRemoteFile.class)) {
return transactionsPath;
}
else if (remoteFile.equals(TempRemoteFile.class)) {
return temporaryPath;
}
else {
return repoPath;
}
}
public String getAbsoluteParentDirectory(File file) {
return file.getAbsolutePath().substring(0, file.getAbsolutePath().lastIndexOf(File.separator));
}
@Override
public boolean testTargetCanWrite() {
try {
if (repoPath.isDirectory()) {
File tempFile = File.createTempFile("syncany-write-test", "tmp", repoPath);
tempFile.delete();
logger.log(Level.INFO, "testTargetCanWrite: Can write, test file created/deleted successfully.");
return true;
}
else {
logger.log(Level.INFO, "testTargetCanWrite: Can NOT write, target does not exist.");
return false;
}
}
catch (Exception e) {
logger.log(Level.INFO, "testTargetCanWrite: Can NOT write to target.", e);
return false;
}
}
@Override
public boolean testTargetExists() {
if (repoPath.exists()) {
logger.log(Level.INFO, "testTargetExists: Target exists.");
return true;
}
else {
logger.log(Level.INFO, "testTargetExists: Target does NOT exist.");
return false;
}
}
@Override
public boolean testRepoFileExists() {
try {
File repoFile = getRemoteFile(new SyncanyRemoteFile());
if (repoFile.exists()) {
logger.log(Level.INFO, "testRepoFileExists: Repo file exists, list(syncany) returned one result.");
return true;
}
else {
logger.log(Level.INFO, "testRepoFileExists: Repo file DOES NOT exist.");
return false;
}
}
catch (Exception e) {
logger.log(Level.INFO, "testRepoFileExists: Repo file DOES NOT exist. Exception occurred.", e);
return false;
}
}
@Override
public boolean testTargetCanCreate() {
if (repoPath.getParentFile().canWrite()) {
logger.log(Level.INFO, "testTargetCanCreate: Can create target.");
return true;
}
else {
logger.log(Level.INFO, "testTargetCanCreate: Can NOT create target.");
return false;
}
}
}