1// Copyright 2015-2016 gRPC authors.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//     http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15// Contains the definitions for a metrics service and the type of metrics
16// exposed by the service.
17//
18// Currently, 'Gauge' (i.e a metric that represents the measured value of
19// something at an instant of time) is the only metric type supported by the
20// service.
21syntax = "proto3";
22
23package grpc.testing;
24
25// Reponse message containing the gauge name and value
26message GaugeResponse {
27  string name = 1;
28  oneof value {
29    int64 long_value = 2;
30    double double_value = 3;
31    string string_value = 4;
32  }
33}
34
35// Request message containing the gauge name
36message GaugeRequest {
37  string name = 1;
38}
39
40message EmptyMessage {}
41
42service MetricsService {
43  // Returns the values of all the gauges that are currently being maintained by
44  // the service
45  rpc GetAllGauges(EmptyMessage) returns (stream GaugeResponse);
46
47  // Returns the value of one gauge
48  rpc GetGauge(GaugeRequest) returns (GaugeResponse);
49}
50