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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
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120 lines
4.2 KiB
120 lines
4.2 KiB
/* |
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* |
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* Copyright 2015-2016, Google Inc. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are |
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* met: |
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* |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* * Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following disclaimer |
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* in the documentation and/or other materials provided with the |
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* distribution. |
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* * Neither the name of Google Inc. nor the names of its |
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* contributors may be used to endorse or promote products derived from |
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* this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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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++/server.h> |
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#include <grpc++/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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Gauge::Gauge(long initial_val) : val_(initial_val) {} |
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void Gauge::Set(long new_val) { |
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std::lock_guard<std::mutex> lock(val_mu_); |
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val_ = new_val; |
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} |
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long Gauge::Get() { |
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std::lock_guard<std::mutex> lock(val_mu_); |
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return val_; |
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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 = gauges_.begin(); it != 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 = gauges_.find(request->name()); |
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if (it != 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<Gauge> MetricsServiceImpl::CreateGauge(const grpc::string& name, |
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bool* already_present) { |
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std::lock_guard<std::mutex> lock(mu_); |
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std::shared_ptr<Gauge> gauge(new Gauge(0)); |
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const auto p = gauges_.emplace(name, gauge); |
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// p.first is an iterator pointing to <name, shared_ptr<Gauge>> pair. p.second |
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// is a boolean which is set to 'true' if the Gauge is inserted in the guages_ |
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// map and 'false' if it is already 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 grpc::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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