test/proto/metrics.proto

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// An integration test service that covers all the method signature permutations
// of unary/streaming requests/responses.
syntax = "proto3";

package grpc.testing;

message GaugeResponse {
  string name = 1;
  oneof value {
    int64 long_value = 2;
    double double_vale = 3;
    string string_value = 4;
  }
}

message GaugeRequest {
  string name = 1;
}

message EmptyMessage {
}

service MetricsService {
  rpc GetAllGauges(EmptyMessage) returns (stream GaugeResponse);
  rpc GetGauge(GaugeRequest) returns (GaugeResponse);
}