@Override
  public void handleLine(String line) {
    getLogger().debug("Result:  %s", line);
    OperationStatus found = null;
    if (line.equals("NOT_FOUND")) {
      found = NOT_FOUND;
    } else {
      found = new OperationStatus(true, line, StatusCode.SUCCESS);
    }
    getCallback().receivedStatus(found);
    transitionState(OperationState.COMPLETE);
  }
Operation for mutating integers inside of memcached.
src/main/java/net/spy/memcached/protocol/ascii/MutatorOperationImpl.java