@Override
public Repo<Master> call(long id, Master master) throws Exception {
Instance instance = master.getInstance();
IZooReaderWriter zoo = ZooReaderWriter.getInstance();
Utils.tableNameLock.lock();
try {
Utils.checkNamespaceDoesNotExist(instance, newName, namespaceId, TableOperation.RENAME);
final String tap =
ZooUtil.getRoot(instance)
+ Constants.ZNAMESPACES
+ "/"
+ namespaceId
+ Constants.ZNAMESPACE_NAME;
zoo.mutate(
tap,
null,
null,
new Mutator() {
@Override
public byte[] mutate(byte[] current) throws Exception {
final String currentName = new String(current);
if (currentName.equals(newName))
return null; // assume in this case the operation is running again, so we are done
if (!currentName.equals(oldName)) {
throw new AcceptableThriftTableOperationException(
null,
oldName,
TableOperation.RENAME,
TableOperationExceptionType.NAMESPACE_NOTFOUND,
"Name changed while processing");
}
return newName.getBytes();
}
});
Tables.clearCache(instance);
} finally {
Utils.tableNameLock.unlock();
Utils.unreserveNamespace(namespaceId, id, true);
}
LoggerFactory.getLogger(RenameNamespace.class)
.debug("Renamed namespace " + namespaceId + " " + oldName + " " + newName);
return null;
}
