The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#) https://grpc.io/
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//
//
// Copyright 2024 gRPC authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
//
// Explicitly define HAVE_ABSEIL to avoid conflict with OTel's Abseil
// version. Refer
// https://github.com/open-telemetry/opentelemetry-cpp/issues/1042.
#ifndef HAVE_ABSEIL
#define HAVE_ABSEIL
#endif
#include "opentelemetry/sdk/metrics/view/instrument_selector_factory.h"
#include "opentelemetry/sdk/metrics/view/meter_selector_factory.h"
#include "opentelemetry/sdk/metrics/view/view_factory.h"
#include <grpcpp/grpcpp.h>
#ifdef BAZEL_BUILD
#include "examples/cpp/otel/codelab/util.h"
#include "examples/protos/helloworld.grpc.pb.h"
#else
#include "helloworld.grpc.pb.h"
#include "util.h"
#endif
using grpc::CallbackServerContext;
using grpc::Channel;
using grpc::ClientContext;
using grpc::Server;
using grpc::ServerBuilder;
using grpc::ServerUnaryReactor;
using grpc::Status;
using helloworld::Greeter;
using helloworld::HelloReply;
using helloworld::HelloRequest;
void AddLatencyView(opentelemetry::sdk::metrics::MeterProvider* provider,
const std::string& name, const std::string& unit) {
auto histogram_config = std::make_shared<
opentelemetry::sdk::metrics::HistogramAggregationConfig>();
histogram_config->boundaries_ = {
0, 0.00001, 0.00005, 0.0001, 0.0003, 0.0006, 0.0008, 0.001, 0.002,
0.003, 0.004, 0.005, 0.006, 0.008, 0.01, 0.013, 0.016, 0.02,
0.025, 0.03, 0.04, 0.05, 0.065, 0.08, 0.1, 0.13, 0.16,
0.2, 0.25, 0.3, 0.4, 0.5, 0.65, 0.8, 1, 2,
5, 10, 20, 50, 100};
provider->AddView(
opentelemetry::sdk::metrics::InstrumentSelectorFactory::Create(
opentelemetry::sdk::metrics::InstrumentType::kHistogram, name, unit),
opentelemetry::sdk::metrics::MeterSelectorFactory::Create(
"grpc-c++", grpc::Version(), ""),
opentelemetry::sdk::metrics::ViewFactory::Create(
name, "", unit,
opentelemetry::sdk::metrics::AggregationType::kHistogram,
std::move(histogram_config)));
}