1 /* 2 * 3 * Copyright 2015 gRPC authors. 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 *is % allowed in string 17 */ 18 19 #include "test/cpp/util/metrics_server.h" 20 21 #include <grpc/support/log.h> 22 #include <grpcpp/server.h> 23 #include <grpcpp/server_builder.h> 24 25 #include "src/proto/grpc/testing/metrics.grpc.pb.h" 26 #include "src/proto/grpc/testing/metrics.pb.h" 27 28 namespace grpc { 29 namespace testing { 30 31 QpsGauge::QpsGauge() 32 : start_time_(gpr_now(GPR_CLOCK_REALTIME)), num_queries_(0) {} 33 34 void QpsGauge::Reset() { 35 std::lock_guard<std::mutex> lock(num_queries_mu_); 36 num_queries_ = 0; 37 start_time_ = gpr_now(GPR_CLOCK_REALTIME); 38 } 39 40 void QpsGauge::Incr() { 41 std::lock_guard<std::mutex> lock(num_queries_mu_); 42 num_queries_++; 43 } 44 45 long QpsGauge::Get() { 46 std::lock_guard<std::mutex> lock(num_queries_mu_); 47 gpr_timespec time_diff = 48 gpr_time_sub(gpr_now(GPR_CLOCK_REALTIME), start_time_); 49 long duration_secs = time_diff.tv_sec > 0 ? time_diff.tv_sec : 1; 50 return num_queries_ / duration_secs; 51 } 52 53 grpc::Status MetricsServiceImpl::GetAllGauges( 54 ServerContext* context, const EmptyMessage* request, 55 ServerWriter<GaugeResponse>* writer) { 56 gpr_log(GPR_DEBUG, "GetAllGauges called"); 57 58 std::lock_guard<std::mutex> lock(mu_); 59 for (auto it = qps_gauges_.begin(); it != qps_gauges_.end(); it++) { 60 GaugeResponse resp; 61 resp.set_name(it->first); // Gauge name 62 resp.set_long_value(it->second->Get()); // Gauge value 63 writer->Write(resp); 64 } 65 66 return Status::OK; 67 } 68 69 grpc::Status MetricsServiceImpl::GetGauge(ServerContext* context, 70 const GaugeRequest* request, 71 GaugeResponse* response) { 72 std::lock_guard<std::mutex> lock(mu_); 73 74 const auto it = qps_gauges_.find(request->name()); 75 if (it != qps_gauges_.end()) { 76 response->set_name(it->first); 77 response->set_long_value(it->second->Get()); 78 } 79 80 return Status::OK; 81 } 82 83 std::shared_ptr<QpsGauge> MetricsServiceImpl::CreateQpsGauge( 84 const grpc::string& name, bool* already_present) { 85 std::lock_guard<std::mutex> lock(mu_); 86 87 std::shared_ptr<QpsGauge> qps_gauge(new QpsGauge()); 88 const auto p = qps_gauges_.insert(std::make_pair(name, qps_gauge)); 89 90 // p.first is an iterator pointing to <name, shared_ptr<QpsGauge>> pair. 91 // p.second is a boolean which is set to 'true' if the QpsGauge is 92 // successfully inserted in the guages_ map and 'false' if it is already 93 // present in the map 94 *already_present = !p.second; 95 return p.first->second; 96 } 97 98 // Starts the metrics server and returns the grpc::Server instance. Call Wait() 99 // on the returned server instance. 100 std::unique_ptr<grpc::Server> MetricsServiceImpl::StartServer(int port) { 101 gpr_log(GPR_INFO, "Building metrics server.."); 102 103 const grpc::string address = "0.0.0.0:" + grpc::to_string(port); 104 105 ServerBuilder builder; 106 builder.AddListeningPort(address, grpc::InsecureServerCredentials()); 107 builder.RegisterService(this); 108 109 std::unique_ptr<grpc::Server> server(builder.BuildAndStart()); 110 gpr_log(GPR_INFO, "Metrics server %s started. Ready to receive requests..", 111 address.c_str()); 112 113 return server; 114 } 115 116 } // namespace testing 117 } // namespace grpc 118
