// rename() and delete() use this method to ensure that the parent directory
// of the source does not vanish.
private void createParent(Path path) throws IOException {
Path parent = path.getParent();
if (parent != null) {
String key = pathToKey(makeAbsolute(parent));
if (key.length() > 0) {
store.storeEmptyFile(key + FOLDER_SUFFIX);
}
}
}
private boolean mkdir(Path f) throws IOException {
try {
FileStatus fileStatus = getFileStatus(f);
if (!fileStatus.isDir()) {
throw new IOException(
String.format("Can't make directory for path '%s' since it is a file.", f));
}
} catch (FileNotFoundException e) {
LOG.debug("Making dir '" + f + "' in S3");
String key = pathToKey(f) + FOLDER_SUFFIX;
store.storeEmptyFile(key);
}
return true;
}
@Override
public boolean rename(Path src, Path dst) throws IOException {
String srcKey = pathToKey(makeAbsolute(src));
if (srcKey.length() == 0) {
// Cannot rename root of file system
return false;
}
final String debugPreamble = "Renaming '" + src + "' to '" + dst + "' - ";
// Figure out the final destination
String dstKey;
try {
boolean dstIsFile = getFileStatus(dst).isFile();
if (dstIsFile) {
if (LOG.isDebugEnabled()) {
LOG.debug(debugPreamble + "returning false as dst is an already existing file");
}
return false;
} else {
if (LOG.isDebugEnabled()) {
LOG.debug(debugPreamble + "using dst as output directory");
}
dstKey = pathToKey(makeAbsolute(new Path(dst, src.getName())));
}
} catch (FileNotFoundException e) {
if (LOG.isDebugEnabled()) {
LOG.debug(debugPreamble + "using dst as output destination");
}
dstKey = pathToKey(makeAbsolute(dst));
try {
if (getFileStatus(dst.getParent()).isFile()) {
if (LOG.isDebugEnabled()) {
LOG.debug(debugPreamble + "returning false as dst parent exists and is a file");
}
return false;
}
} catch (FileNotFoundException ex) {
if (LOG.isDebugEnabled()) {
LOG.debug(debugPreamble + "returning false as dst parent does not exist");
}
return false;
}
}
boolean srcIsFile;
try {
srcIsFile = getFileStatus(src).isFile();
} catch (FileNotFoundException e) {
if (LOG.isDebugEnabled()) {
LOG.debug(debugPreamble + "returning false as src does not exist");
}
return false;
}
if (srcIsFile) {
if (LOG.isDebugEnabled()) {
LOG.debug(debugPreamble + "src is file, so doing copy then delete in S3");
}
store.copy(srcKey, dstKey);
store.delete(srcKey);
} else {
if (LOG.isDebugEnabled()) {
LOG.debug(debugPreamble + "src is directory, so copying contents");
}
store.storeEmptyFile(dstKey + FOLDER_SUFFIX);
List<String> keysToDelete = new ArrayList<String>();
String priorLastKey = null;
do {
PartialListing listing = store.list(srcKey, S3_MAX_LISTING_LENGTH, priorLastKey, true);
for (FileMetadata file : listing.getFiles()) {
keysToDelete.add(file.getKey());
store.copy(file.getKey(), dstKey + file.getKey().substring(srcKey.length()));
}
priorLastKey = listing.getPriorLastKey();
} while (priorLastKey != null);
if (LOG.isDebugEnabled()) {
LOG.debug(debugPreamble + "all files in src copied, now removing src files");
}
for (String key : keysToDelete) {
store.delete(key);
}
try {
store.delete(srcKey + FOLDER_SUFFIX);
} catch (FileNotFoundException e) {
// this is fine, we don't require a marker
}
if (LOG.isDebugEnabled()) {
LOG.debug(debugPreamble + "done");
}
}
return true;
}