1// Copyright 2015-2016 The 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// Contains the definitions for a metrics service and the type of metrics
15// exposed by the service.
16//
17// Currently, 'Gauge' (i.e a metric that represents the measured value of
18// something at an instant of time) is the only metric type supported by the
19// service.
20syntax = "proto3";
21
22package grpc.testing;
23
24option java_package = "io.grpc.testing.integration";
25
26// Reponse message containing the gauge name and value
27message GaugeResponse {
28  string name = 1;
29  oneof value {
30    int64 long_value = 2;
31    double double_value = 3;
32    string string_value = 4;
33  }
34}
35
36// Request message containing the gauge name
37message GaugeRequest {
38  string name = 1;
39}
40
41message EmptyMessage {}
42
43service MetricsService {
44  // Returns the values of all the gauges that are currently being maintained by
45  // the service
46  rpc GetAllGauges(EmptyMessage) returns (stream GaugeResponse);
47
48  // Returns the value of one gauge
49  rpc GetGauge(GaugeRequest) returns (GaugeResponse);
50}
51