@Override
public byte[] getXAttr(long fileId, String uid, String key) throws DatabaseException {
ResultSet<byte[], byte[]> it = null;
try {
// peform a prefix lookup
byte[] prefix = BabuDBStorageHelper.createXAttrPrefixKey(fileId, uid, key);
it = database.prefixLookup(XATTRS_INDEX, prefix, null).get();
// check whether the entry is the correct one
while (it.hasNext()) {
Entry<byte[], byte[]> curr = it.next();
BufferBackedXAttr xattr = new BufferBackedXAttr(curr.getKey(), curr.getValue());
if (uid.equals(xattr.getOwner()) && key.equals(xattr.getKey())) return xattr.getValue();
}
return null;
} catch (BabuDBException exc) {
throw new DatabaseException(exc);
} finally {
if (it != null) it.free();
}
}
@Override
public FileMetadata createSymLink(
long fileId,
long parentId,
String fileName,
int atime,
int ctime,
int mtime,
String userId,
String groupId,
String ref,
AtomicDBUpdate update) {
// create metadata
BufferBackedFileMetadata fileMetadata =
new BufferBackedFileMetadata(
parentId,
fileName,
userId,
groupId,
fileId,
atime,
ctime,
mtime,
ref.length(),
0777,
0,
(short) 1,
0,
0,
false);
// create link target (XAttr)
BufferBackedXAttr lt =
new BufferBackedXAttr(fileId, SYSTEM_UID, LINK_TARGET_ATTR_NAME, ref.getBytes(), (short) 0);
update.addUpdate(XATTRS_INDEX, lt.getKeyBuf(), lt.getValBuf());
// update main metadata in the file index
update.addUpdate(
FILE_INDEX, fileMetadata.getFCMetadataKey(), fileMetadata.getFCMetadataValue());
update.addUpdate(
FILE_INDEX, fileMetadata.getRCMetadata().getKey(), fileMetadata.getRCMetadata().getValue());
// add an entry to the file ID index
update.addUpdate(
FILE_ID_INDEX,
BabuDBStorageHelper.createFileIdIndexKey(fileId, (byte) 3),
BabuDBStorageHelper.createFileIdIndexValue(parentId, fileName));
return fileMetadata;
}
public void setXAttr(
long fileId, String uid, String key, byte[] value, boolean init, AtomicDBUpdate update)
throws DatabaseException {
try {
short collNumber =
init ? -1 : BabuDBStorageHelper.findXAttrCollisionNumber(database, fileId, uid, key);
BufferBackedXAttr xattr = new BufferBackedXAttr(fileId, uid, key, value, collNumber);
update.addUpdate(XATTRS_INDEX, xattr.getKeyBuf(), value == null ? null : xattr.getValBuf());
if (key.startsWith(SYS_ATTR_KEY_PREFIX + MRCHelper.POLICY_ATTR_PREFIX))
notifyAttributeSet(volume.getId(), key, value == null ? null : new String(value));
} catch (BabuDBException exc) {
throw new DatabaseException(exc);
}
}
