// Licensed to the Apache Software Foundation (ASF) under one // or more contributor license agreements. See the NOTICE file // distributed with this work for additional information // regarding copyright ownership. The ASF licenses this file // to you 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. // A client sending requests to server in parallel by multiple threads. #include <gflags/gflags.h> #include <bthread/bthread.h> #include <butil/logging.h> #include <butil/string_printf.h> #include <butil/time.h> #include <butil/macros.h> #include <brpc/parallel_channel.h> #include <brpc/server.h> #include "echo.pb.h" DEFINE_int32(thread_num, 50, "Number of threads to send requests"); DEFINE_int32(channel_num, 3, "Number of sub channels"); DEFINE_bool(same_channel, false, "Add the same sub channel multiple times"); DEFINE_bool(use_bthread, false, "Use bthread to send requests"); DEFINE_int32(attachment_size, 0, "Carry so many byte attachment along with requests"); DEFINE_int32(request_size, 16, "Bytes of each request"); DEFINE_string(connection_type, "", "Connection type. Available values: single, pooled, short"); DEFINE_string(protocol, "baidu_std", "Protocol type. Defined in src/brpc/options.proto"); DEFINE_string(server, "0.0.0.0:8002", "IP Address of server"); DEFINE_string(load_balancer, "", "The algorithm for load balancing"); DEFINE_int32(timeout_ms, 100, "RPC timeout in milliseconds"); DEFINE_int32(max_retry, 3, "Max retries(not including the first RPC)"); DEFINE_bool(dont_fail, false, "Print fatal when some call failed"); DEFINE_int32(dummy_port, -1, "Launch dummy server at this port"); std::string g_request; std::string g_attachment; bvar::LatencyRecorder g_latency_recorder("client"); bvar::Adder<int> g_error_count("client_error_count"); bvar::LatencyRecorder* g_sub_channel_latency = NULL; static void* sender(void* arg) { // Normally, you should not call a Channel directly, but instead construct // a stub Service wrapping it. stub can be shared by all threads as well. example::EchoService_Stub stub(static_cast<google::protobuf::RpcChannel*>(arg)); int log_id = 0; while (!brpc::IsAskedToQuit()) { // We will receive response synchronously, safe to put variables // on stack. example::EchoRequest request; example::EchoResponse response; brpc::Controller cntl; request.set_value(log_id++); if (!g_attachment.empty()) { // Set attachment which is wired to network directly instead of // being serialized into protobuf messages. cntl.request_attachment().append(g_attachment); } // Because `done'(last parameter) is NULL, this function waits until // the response comes back or error occurs(including timedout). stub.Echo(&cntl, &request, &response, NULL); if (!cntl.Failed()) { g_latency_recorder << cntl.latency_us(); for (int i = 0; i < cntl.sub_count(); ++i) { if (cntl.sub(i) && !cntl.sub(i)->Failed()) { g_sub_channel_latency[i] << cntl.sub(i)->latency_us(); } } } else { g_error_count << 1; CHECK(brpc::IsAskedToQuit() || !FLAGS_dont_fail) << "error=" << cntl.ErrorText() << " latency=" << cntl.latency_us(); // We can't connect to the server, sleep a while. Notice that this // is a specific sleeping to prevent this thread from spinning too // fast. You should continue the business logic in a production // server rather than sleeping. bthread_usleep(50000); } } return NULL; } int main(int argc, char* argv[]) { // Parse gflags. We recommend you to use gflags as well. GFLAGS_NS::ParseCommandLineFlags(&argc, &argv, true); // A Channel represents a communication line to a Server. Notice that // Channel is thread-safe and can be shared by all threads in your program. brpc::ParallelChannel channel; brpc::ParallelChannelOptions pchan_options; pchan_options.timeout_ms = FLAGS_timeout_ms; if (channel.Init(&pchan_options) != 0) { LOG(ERROR) << "Fail to init ParallelChannel"; return -1; } brpc::ChannelOptions sub_options; sub_options.protocol = FLAGS_protocol; sub_options.connection_type = FLAGS_connection_type; sub_options.max_retry = FLAGS_max_retry; // Setting sub_options.timeout_ms does not work because timeout of sub // channels are disabled in ParallelChannel. if (FLAGS_same_channel) { // For brpc >= 1.0.155.31351, a sub channel can be added into // a ParallelChannel more than once. brpc::Channel* sub_channel = new brpc::Channel; // Initialize the channel, NULL means using default options. // options, see `brpc/channel.h'. if (sub_channel->Init(FLAGS_server.c_str(), FLAGS_load_balancer.c_str(), &sub_options) != 0) { LOG(ERROR) << "Fail to initialize sub_channel"; return -1; } for (int i = 0; i < FLAGS_channel_num; ++i) { if (channel.AddChannel(sub_channel, brpc::OWNS_CHANNEL, NULL, NULL) != 0) { LOG(ERROR) << "Fail to AddChannel, i=" << i; return -1; } } } else { for (int i = 0; i < FLAGS_channel_num; ++i) { brpc::Channel* sub_channel = new brpc::Channel; // Initialize the channel, NULL means using default options. // options, see `brpc/channel.h'. if (sub_channel->Init(FLAGS_server.c_str(), FLAGS_load_balancer.c_str(), &sub_options) != 0) { LOG(ERROR) << "Fail to initialize sub_channel[" << i << "]"; return -1; } if (channel.AddChannel(sub_channel, brpc::OWNS_CHANNEL, NULL, NULL) != 0) { LOG(ERROR) << "Fail to AddChannel, i=" << i; return -1; } } } // Initialize bvar for sub channel g_sub_channel_latency = new bvar::LatencyRecorder[FLAGS_channel_num]; for (int i = 0; i < FLAGS_channel_num; ++i) { std::string name; butil::string_printf(&name, "client_sub_%d", i); g_sub_channel_latency[i].expose(name); } if (FLAGS_attachment_size > 0) { g_attachment.resize(FLAGS_attachment_size, 'a'); } if (FLAGS_request_size <= 0) { LOG(ERROR) << "Bad request_size=" << FLAGS_request_size; return -1; } g_request.resize(FLAGS_request_size, 'r'); if (FLAGS_dummy_port >= 0) { brpc::StartDummyServerAt(FLAGS_dummy_port); } std::vector<bthread_t> bids; std::vector<pthread_t> pids; if (!FLAGS_use_bthread) { pids.resize(FLAGS_thread_num); for (int i = 0; i < FLAGS_thread_num; ++i) { if (pthread_create(&pids[i], NULL, sender, &channel) != 0) { LOG(ERROR) << "Fail to create pthread"; return -1; } } } else { bids.resize(FLAGS_thread_num); for (int i = 0; i < FLAGS_thread_num; ++i) { if (bthread_start_background( &bids[i], NULL, sender, &channel) != 0) { LOG(ERROR) << "Fail to create bthread"; return -1; } } } while (!brpc::IsAskedToQuit()) { sleep(1); LOG(INFO) << "Sending EchoRequest at qps=" << g_latency_recorder.qps(1) << " latency=" << g_latency_recorder.latency(1) << noflush; for (int i = 0; i < FLAGS_channel_num; ++i) { LOG(INFO) << " latency_" << i << "=" << g_sub_channel_latency[i].latency(1) << noflush; } LOG(INFO); } LOG(INFO) << "EchoClient is going to quit"; for (int i = 0; i < FLAGS_thread_num; ++i) { if (!FLAGS_use_bthread) { pthread_join(pids[i], NULL); } else { bthread_join(bids[i], NULL); } } return 0; }