private void visitEntry(final Entry entry, DropboxEntryVisitor visitor) {
if (null != entry.contents) {
logger.debug(entry.path + "contents size: " + entry.contents.size());
for (Entry child : entry.contents) {
if (!child.isDeleted) {
if (!child.isDir) {
visitor.visitFile(child);
} else {
try {
visitor.preVisitDirectory(child);
} catch (IOException e) {
logger.error(e.getMessage());
}
try {
Entry childWithContents =
api.metadata(
child.path,
0,
MetaHandler.getHash(child.path),
true,
MetaHandler.getRev(child.path));
visitEntry(childWithContents, visitor);
} catch (DropboxException e) {
logger.error(e.getMessage());
}
visitor.postVisitDirectory(child);
}
}
}
}
}
private void loadMetadata(DropboxFile file) {
Log.d(TAG, "Loading metadata for " + file.getRemoteFile());
DropboxAPI.Entry metadata = null;
try {
metadata = dropboxApi.metadata(file.getRemoteFile(), 0, null, false, null);
} catch (DropboxServerException se) {
if (se.error == DropboxServerException._404_NOT_FOUND) {
Log.d(TAG, "metadata NOT found! Returning NOT_FOUND status.");
file.setStatus(DropboxFileStatus.NOT_FOUND);
return;
}
throw new RemoteException("Server Exception: " + se.error + " " + se.reason, se);
} catch (DropboxException e) {
throw new RemoteException("Dropbox Exception: " + e.getMessage(), e);
}
Log.d(TAG, "Metadata retrieved. rev on Dropbox = " + metadata.rev);
Log.d(TAG, "local rev = " + file.getOriginalRev());
file.setLoadedMetadata(metadata);
if (metadata.rev.equals(file.getOriginalRev())) {
// don't bother downloading if the rev is the same
Log.d(TAG, "revs match. returning NOT_CHANGED status.");
file.setStatus(DropboxFileStatus.NOT_CHANGED);
} else if (metadata.isDeleted) {
Log.d(TAG, "File marked as deleted on Dropbox! Returning NOT_FOUND status.");
file.setStatus(DropboxFileStatus.NOT_FOUND);
} else {
Log.d(TAG, "revs don't match. returning FOUND status.");
file.setStatus(DropboxFileStatus.FOUND);
}
}
private void syncStorage() {
try {
logger.debug("Synching storage.");
final String rootDir = "/";
Entry folderEntry =
api.metadata(rootDir, 0, MetaHandler.getHash(rootDir), true, MetaHandler.getRev(rootDir));
// TODO handle removed entries
visitEntry(
folderEntry,
new DropboxEntryVisitor() {
@Override
public void preVisitDirectory(Entry entry) throws IOException {
if (!MetaHandler.isStored(entry.path)) {
logger.debug("Creating local dir: " + entry.path);
Path filePath =
FileSystems.getDefault().getPath(startDir.toString(), entry.path.substring(1));
WatchKey key =
filePath
.getParent()
.register(watcher, ENTRY_CREATE, ENTRY_DELETE, ENTRY_MODIFY);
keys.remove(key);
key.cancel();
filePath.toFile().mkdir();
key =
filePath
.getParent()
.register(watcher, ENTRY_CREATE, ENTRY_DELETE, ENTRY_MODIFY);
keys.put(key, filePath.getParent());
MetaHandler.setFile(entry.path, filePath.toFile(), entry.rev);
}
}
@Override
public void visitFile(Entry entry) {
if (!MetaHandler.isStored(entry.path)) downloadFile(entry.path);
else if (!MetaHandler.isCurrent(entry.path, entry.rev)) {
Path fullPath =
FileSystems.getDefault().getPath(startDir.toString(), entry.path.substring(1));
try {
logger.debug("Uploading file " + entry.path);
uploadFile(entry.path, fullPath);
} catch (Exception e) {
logger.error("Error uploading file: " + e.getMessage());
}
}
}
});
} catch (DropboxException ex) {
logger.error("Error syching root dir: " + ex.getMessage());
}
}
public void downloadFile(String relPath) {
VOSync.debug("Downloading file from storage: " + relPath);
Path filePath = FileSystems.getDefault().getPath(startDir.toString(), relPath.substring(1));
try {
WatchKey key =
filePath.getParent().register(watcher, ENTRY_CREATE, ENTRY_DELETE, ENTRY_MODIFY);
keys.remove(key);
key.cancel();
FileOutputStream outp = new FileOutputStream(filePath.toFile());
DropboxFileInfo info = api.getFile(relPath, null, outp, null);
outp.close();
key = filePath.getParent().register(watcher, ENTRY_CREATE, ENTRY_DELETE, ENTRY_MODIFY);
keys.put(key, filePath.getParent());
MetaHandler.setFile(relPath, filePath.toFile(), info.getMetadata().rev);
} catch (IOException ex) {
logger.error("Error downloading file " + relPath + ": " + ex.getMessage());
} catch (DropboxException ex) {
ex.printStackTrace();
logger.error("Error downloading file " + relPath + ": " + ex.getMessage());
}
}
@Override
public void run() {
logger.debug("Register root " + startDir.toString());
try {
registerAll(startDir);
} catch (IOException ex) {
logger.error(ex.getMessage());
return;
}
if (isInterrupted()) return;
VOSync.debug("Sync local db with drive");
DbPool.goSql(
"Synching the local db with drive",
"select NAME from FILES",
new SqlWorker<Boolean>() {
@Override
public Boolean go(Connection conn, PreparedStatement stmt) throws SQLException {
ResultSet resSet = stmt.executeQuery();
while (resSet.next()) {
try {
String fileName = resSet.getString(1);
Path filePath =
FileSystems.getDefault().getPath(startDir.toString(), fileName.substring(1));
if (!filePath.toFile().exists()) {
logger.debug(
"Deleting file " + fileName + " existing in DB and not present on disk");
api.delete(fileName);
MetaHandler.delete(fileName);
}
} catch (DropboxException ex) {
}
}
resSet.close();
return true;
}
});
if (isInterrupted()) return;
VOSync.debug("Sync storage");
syncStorage();
logger.debug("Start watching");
while (!isInterrupted()) {
WatchKey key;
try {
key = watcher.take();
} catch (InterruptedException x) {
return;
}
Path dir = keys.get(key);
if (dir == null) {
System.err.println("WatchKey " + key.toString() + " not recognized!");
continue;
}
for (WatchEvent<?> event : key.pollEvents()) {
Kind<?> kind = event.kind();
// TBD - provide example of how OVERFLOW event is handled
if (kind == OVERFLOW) {
continue;
}
// Context for directory entry event is the file name of entry
WatchEvent<Path> ev = cast(event);
Path name = ev.context();
Path child = dir.resolve(name);
Path relativeDir = startDir.relativize(child);
String fileRelPath = "/" + fixPath(relativeDir.toString());
// print out event
logger.debug(event.kind().name() + ":" + child + " " + name + " " + key);
try {
if (Files.exists(child, new LinkOption[] {}) && Files.isHidden(child)) {
logger.error(
"Skipping hidden file " + child.getFileName()); // skip OS generated catalog files
} else {
if (event.kind() == ENTRY_CREATE) {
if (Files.isRegularFile(child, NOFOLLOW_LINKS)) { // file modified
uploadFile(fileRelPath, child);
} else if (Files.isDirectory(child, NOFOLLOW_LINKS)) { // directory contents changed
registerAll(child);
}
} else if (event.kind() == ENTRY_DELETE) {
logger.debug("Deleting " + fileRelPath);
api.delete(fileRelPath);
MetaHandler.delete(fileRelPath);
logger.debug("Deleted!");
} else if (event.kind() == ENTRY_MODIFY) {
if (Files.isRegularFile(child, NOFOLLOW_LINKS)) { // file modified
uploadFile(fileRelPath, child);
} else if (Files.isDirectory(child, NOFOLLOW_LINKS)) { // directory contents changed
// logger.debug("Renewing dir: "+relativeDir.toString());
// TODO update folder date
// MetaHandler.setFile(fileRelPath, child, rev);
}
}
}
} catch (IOException ex) {
ex.printStackTrace();
logger.error(ex.getMessage());
} catch (DropboxException ex) {
ex.printStackTrace();
logger.error(ex.getMessage());
}
}
boolean valid = key.reset();
if (!valid) keys.remove(key);
}
}