protocol/src/main/protobuf/GeneralRPC.proto

package exec.rpc;

option java_package = "org.apache.drill.exec.proto";
option java_outer_classname = "GeneralRPCProtos";
option optimize_for = SPEED;

import "Coordination.proto";

message Ack{
	optional bool ok = 1;
}

enum RpcMode {
  REQUEST = 0;
  RESPONSE = 1;
  RESPONSE_FAILURE = 2;
}

message RpcHeader{
	optional RpcMode mode = 1; 
	optional int32 coordination_id = 2; // reusable coordination identifier.  Sender defines.  Server returns on return.  Irrelevant for purely single direction rpc.
	optional int32 rpc_type = 3; // a rpc mode specific rpc type.
}

message CompleteRpcMessage {
    optional RpcHeader header = 1; // required
    optional bytes protobuf_body = 2; // required
    optional bytes raw_body = 3; // optional
}

// Class to be used when an unexpected exception occurs while a rpc call is being evaluated.
message RpcFailure {
  optional int64 error_id = 1; // for server trackback.
  optional int32 error_code = 2; // system defined error code.
  optional string short_error = 3;
  optional string long_error = 4;
}