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//
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//
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// Copyright 2015 gRPC authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// is % allowed in string
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//
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#include "test/cpp/util/metrics_server.h"
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#include <grpc/support/log.h>
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#include <grpcpp/server.h>
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#include <grpcpp/server_builder.h>
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#include "src/proto/grpc/testing/metrics.grpc.pb.h"
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#include "src/proto/grpc/testing/metrics.pb.h"
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namespace grpc {
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namespace testing {
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QpsGauge::QpsGauge()
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: start_time_(gpr_now(GPR_CLOCK_REALTIME)), num_queries_(0) {}
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void QpsGauge::Reset() {
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std::lock_guard<std::mutex> lock(num_queries_mu_);
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num_queries_ = 0;
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start_time_ = gpr_now(GPR_CLOCK_REALTIME);
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}
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void QpsGauge::Incr() {
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std::lock_guard<std::mutex> lock(num_queries_mu_);
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num_queries_++;
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}
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long QpsGauge::Get() {
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std::lock_guard<std::mutex> lock(num_queries_mu_);
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gpr_timespec time_diff =
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gpr_time_sub(gpr_now(GPR_CLOCK_REALTIME), start_time_);
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long duration_secs = time_diff.tv_sec > 0 ? time_diff.tv_sec : 1;
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return num_queries_ / duration_secs;
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}
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grpc::Status MetricsServiceImpl::GetAllGauges(
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ServerContext* /*context*/, const EmptyMessage* /*request*/,
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ServerWriter<GaugeResponse>* writer) {
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gpr_log(GPR_DEBUG, "GetAllGauges called");
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std::lock_guard<std::mutex> lock(mu_);
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for (auto it = qps_gauges_.begin(); it != qps_gauges_.end(); it++) {
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GaugeResponse resp;
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resp.set_name(it->first); // Gauge name
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resp.set_long_value(it->second->Get()); // Gauge value
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writer->Write(resp);
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}
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return Status::OK;
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}
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grpc::Status MetricsServiceImpl::GetGauge(ServerContext* /*context*/,
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const GaugeRequest* request,
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GaugeResponse* response) {
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std::lock_guard<std::mutex> lock(mu_);
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const auto it = qps_gauges_.find(request->name());
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if (it != qps_gauges_.end()) {
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response->set_name(it->first);
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response->set_long_value(it->second->Get());
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}
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return Status::OK;
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}
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std::shared_ptr<QpsGauge> MetricsServiceImpl::CreateQpsGauge(
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const std::string& name, bool* already_present) {
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std::lock_guard<std::mutex> lock(mu_);
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std::shared_ptr<QpsGauge> qps_gauge(new QpsGauge());
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const auto p = qps_gauges_.insert(std::make_pair(name, qps_gauge));
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// p.first is an iterator pointing to <name, shared_ptr<QpsGauge>> pair.
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// p.second is a boolean which is set to 'true' if the QpsGauge is
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// successfully inserted in the guages_ map and 'false' if it is already
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// present in the map
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*already_present = !p.second;
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return p.first->second;
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}
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// Starts the metrics server and returns the grpc::Server instance. Call Wait()
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// on the returned server instance.
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std::unique_ptr<grpc::Server> MetricsServiceImpl::StartServer(int port) {
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gpr_log(GPR_INFO, "Building metrics server..");
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const std::string address = "0.0.0.0:" + std::to_string(port);
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ServerBuilder builder;
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builder.AddListeningPort(address, grpc::InsecureServerCredentials());
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builder.RegisterService(this);
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std::unique_ptr<grpc::Server> server(builder.BuildAndStart());
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gpr_log(GPR_INFO, "Metrics server %s started. Ready to receive requests..",
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address.c_str());
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return server;
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}
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} // namespace testing
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} // namespace grpc
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