Initial commit

src/main/proto/Calculator.proto

@@ -0,0 +1,18 @@
+syntax = "proto3";
+option go_package = "./calc";
+option java_package = "ch.sdi.calc";
+package calc;
+
+message CalculatorRequest {
+  string expression = 1;
+}
+
+message CalculatorResponse {
+  string expression = 1;
+  double result = 2;
+  int64 calculation_time_us = 3;
+}
+
+service Calculator {
+  rpc Calculate(CalculatorRequest) returns (CalculatorResponse);
+}