public TajoIdProtos.TaskAttemptIdProto getProto() {
return TajoIdProtos.TaskAttemptIdProto.newBuilder()
.setTaskId(taskId.getProto())
.setId(id)
.build();
}
public TaskAttemptId(TajoIdProtos.TaskAttemptIdProto proto) {
this(new TaskId(proto.getTaskId()), proto.getId());
}