syntax = "proto3";

message Arg {
  uint64 objectid = 1; // The objectid for the argument.
  string serialized_arg = 2; // A serialized representation of an argument passed by value.
}

message Task {
  string name = 1; // Name of the function call. Must not be empty.
  repeated Arg arg = 2; // List of object IDs of the arguments to the function.
  repeated uint64 result = 3; // Object IDs for result
}

message Put {
  uint64 objectid = 1; // The objectid for the object that was put
}

message Get {
  uint64 objectid = 1; // The objectid for the object that is retrieved
}

// This is used internally by the scheduler. From the scheduler's perspective,
// the submission of tasks (via SubmitTask) and the submission of puts (via
// PutObj) look very similar, and so it is useful to be able to handle them
// together (for example in the computation graph).
message Operation {
  Task task = 1;
  Put put = 2;
  Get get = 4;
  uint64 creator_operationid = 3; // The id of the task that called this task or put.
}

message TaskStatus {
  uint64 operationid = 1;
  string function_name = 2;
  string worker_address = 3;
  string error_message = 4;
}

message CompGraph {
  repeated Operation operation = 1;
}