CoprocessorService, Coprocessor {
private RegionCoprocessorEnvironment env;
@Override
public void mutateRows(RpcController controller, MutateRowsRequest request,
RpcCallback<MutateRowsResponse> done) {
MutateRowsResponse response = MutateRowsResponse.getDefaultInstance();
try {
// set of rows to lock, sorted to avoid deadlocks
SortedSet<byte[]> rowsToLock = new TreeSet<byte[]>(Bytes.BYTES_COMPARATOR);
List<MutationProto> mutateRequestList = request.getMutationRequestList();
List<Mutation> mutations = new ArrayList<Mutation>(mutateRequestList.size());