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/*
*
* Copyright 2015 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.
*is % allowed in string
*/
#include "test/cpp/util/metrics_server.h"
#include <grpc++/server.h>
#include <grpc++/server_builder.h>
#include <grpc/support/log.h>
#include "src/proto/grpc/testing/metrics.grpc.pb.h"
#include "src/proto/grpc/testing/metrics.pb.h"
namespace grpc {
namespace testing {
QpsGauge::QpsGauge()
: start_time_(gpr_now(GPR_CLOCK_REALTIME)), num_queries_(0) {}
void QpsGauge::Reset() {
std::lock_guard<std::mutex> lock(num_queries_mu_);
num_queries_ = 0;
start_time_ = gpr_now(GPR_CLOCK_REALTIME);
}
void QpsGauge::Incr() {
std::lock_guard<std::mutex> lock(num_queries_mu_);
num_queries_++;
}
long QpsGauge::Get() {
std::lock_guard<std::mutex> lock(num_queries_mu_);
gpr_timespec time_diff =
gpr_time_sub(gpr_now(GPR_CLOCK_REALTIME), start_time_);
long duration_secs = time_diff.tv_sec > 0 ? time_diff.tv_sec : 1;
return num_queries_ / duration_secs;
}
grpc::Status MetricsServiceImpl::GetAllGauges(
ServerContext* context, const EmptyMessage* request,
ServerWriter<GaugeResponse>* writer) {
gpr_log(GPR_DEBUG, "GetAllGauges called");
std::lock_guard<std::mutex> lock(mu_);
for (auto it = qps_gauges_.begin(); it != qps_gauges_.end(); it++) {
GaugeResponse resp;
resp.set_name(it->first); // Gauge name
resp.set_long_value(it->second->Get()); // Gauge value
writer->Write(resp);
}
return Status::OK;
}
grpc::Status MetricsServiceImpl::GetGauge(ServerContext* context,
const GaugeRequest* request,
GaugeResponse* response) {
std::lock_guard<std::mutex> lock(mu_);
const auto it = qps_gauges_.find(request->name());
if (it != qps_gauges_.end()) {
response->set_name(it->first);
response->set_long_value(it->second->Get());
}
return Status::OK;
}
std::shared_ptr<QpsGauge> MetricsServiceImpl::CreateQpsGauge(
const grpc::string& name, bool* already_present) {
std::lock_guard<std::mutex> lock(mu_);
std::shared_ptr<QpsGauge> qps_gauge(new QpsGauge());
const auto p = qps_gauges_.insert(std::make_pair(name, qps_gauge));
// p.first is an iterator pointing to <name, shared_ptr<QpsGauge>> pair.
// p.second is a boolean which is set to 'true' if the QpsGauge is
// successfully inserted in the guages_ map and 'false' if it is already
// present in the map
*already_present = !p.second;
return p.first->second;
}
// Starts the metrics server and returns the grpc::Server instance. Call Wait()
// on the returned server instance.
std::unique_ptr<grpc::Server> MetricsServiceImpl::StartServer(int port) {
gpr_log(GPR_INFO, "Building metrics server..");
const grpc::string address = "0.0.0.0:" + grpc::to_string(port);
ServerBuilder builder;
builder.AddListeningPort(address, grpc::InsecureServerCredentials());
builder.RegisterService(this);
std::unique_ptr<grpc::Server> server(builder.BuildAndStart());
gpr_log(GPR_INFO, "Metrics server %s started. Ready to receive requests..",
address.c_str());
return server;
}
} // namespace testing
} // namespace grpc
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