What means by single response/request(Unary) and stream message(Bi-directional)

[MD ATIF BIN KARIM]

I am using the following message in protocol buffer

syntax = "proto3";

package demo_grpc;

message S_Response {

string name = 1;

string street = 2;

string zip = 3;

string city = 4;

string country = 5;

int32 double_init_val = 6;

}

message C_Request {

uint32 choose_area = 1;

string name = 2;

int32 init_val = 3;

}

service AddressBook {

rpc GetAddress(C_Request) returns (S_Response) {}

}

I have set up all of the values for the `C_Request` and pass them to the server where

`S_Response` messages fields are processed and returned back to the client.

My question is--

1/ May I call it a Unary RPC?

2/ I want to in next stage pass a very large data (around 10GB, probably a vector or array

not a file as far I know). And have found that I have to pass it via small chunk. That large

vector related data field will be resided in a single message.

What will be name of this type of RPC(eg: Bidirectional streaming RPC)?

[Vinod Lasrado]

Hi,

Please refer to the following links for basic understanding of gRPC.

https://grpc.io/docs/what-is-grpc/core-concepts/

https://stackoverflow.com/questions/58429357/should-i-transmit-large-data-sets-via-grpc-without-manual-chunking

To answer your questions.

1. Yes the example shown is a unary RPC.

2. Depending on implementation it can be server side of client side streaming.

--Vinod