Function machines

src/master/maintenance.cpp:264–290

Try<Nothing> machines(const RepeatedPtrField<MachineID>& ids)
{
  if (ids.size() <= 0) {
    return Error("List of machines is empty");
  }

  // Verify that the machine has at least one non-empty field value.
  hashset<MachineID> uniques;
  foreach (const MachineID& id, ids) {
    // Validate the single machine.
    Try<Nothing> validId = validation::machine(id);
    if (validId.isError()) {
      return Error(validId.error());
    }

    // Check machine uniqueness.
    if (uniques.contains(id)) {
      return Error(
          "Machine '" + stringify(JSON::protobuf(id)) +
            "' appears more than once in the schedule");
    }

    uniques.insert(id);
  }

  return Nothing();
}


Try<Nothing> machine(const MachineID& id)