gRPC描述符

syntax = "proto3";

import "google/protobuf/empty.proto";
import "cloudstate/entity_key.proto";

package example.shoppingcart;

service ShoppingCartService {
    rpc AddItem(AddLineItem) returns (google.protobuf.Empty);
    rpc RemoveItem(RemoveLineItem) returns (google.protobuf.Empty);
    rpc GetCart(GetShoppingCart) returns (Cart);
}

message AddLineItem {
    string user_id = 1 [(.cloudstate.entity_key) = true];
    string product_id = 2;
    string name = 3;
    int32 quantity = 4;
}

message RemoveLineItem {
    string user_id = 1 [(.cloudstate.entity_key) = true];
    string product_id = 2;
}

message GetShoppingCart {
    string user_id = 1 [(.cloudstate.entity_key) = true];
}

message LineItem {
    string product_id = 1;
    string name = 2;
    int32 quantity = 3;
}

message Cart {
    repeated LineItem items = 1;
}