// Copyright (c) 2014 Baidu, Inc. // // 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. // A client sending requests to server which will send the request to itself // again according to the field `depth' #include <gflags/gflags.h> #include <butil/logging.h> #include <butil/time.h> #include <bthread/bthread.h> #include <brpc/channel.h> #include <brpc/server.h> #include "echo.pb.h" #include <bvar/bvar.h> DEFINE_int32(thread_num, 4, "Number of threads to send requests"); DEFINE_bool(use_bthread, false, "Use bthread to send requests"); DEFINE_string(attachment, "foo", "Carry this along with requests"); DEFINE_string(connection_type, "", "Connection type. Available values: single, pooled, short"); DEFINE_string(server, "0.0.0.0:8000", "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_string(protocol, "baidu_std", "Protocol type. Defined in src/brpc/options.proto"); DEFINE_int32(depth, 0, "number of loop calls"); // Don't send too frequently in this example DEFINE_int32(sleep_ms, 100, "milliseconds to sleep after each RPC"); DEFINE_int32(dummy_port, -1, "Launch dummy server at this port"); bvar::LatencyRecorder g_latency_recorder("client"); void* sender(void* arg) { brpc::Channel* chan = (brpc::Channel*)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(chan); // Send a request and wait for the response every 1 second. 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_message("hello world"); if (FLAGS_depth > 0) { request.set_depth(FLAGS_depth); } cntl.set_log_id(log_id ++); // set by user // Set attachment which is wired to network directly instead of // being serialized into protobuf messages. cntl.request_attachment().append(FLAGS_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()) { //LOG_EVERY_SECOND(WARNING) << "Fail to send EchoRequest, " << cntl.ErrorText(); } else { g_latency_recorder << cntl.latency_us(); } if (FLAGS_sleep_ms != 0) { bthread_usleep(FLAGS_sleep_ms * 1000L); } } return NULL; } int main(int argc, char* argv[]) { // Parse gflags. We recommend you to use gflags as well. GFLAGS_NS::SetUsageMessage("Send EchoRequest to server every second"); 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::Channel channel; brpc::ChannelOptions options; options.protocol = FLAGS_protocol; options.connection_type = FLAGS_connection_type; options.timeout_ms = FLAGS_timeout_ms/*milliseconds*/; options.max_retry = FLAGS_max_retry; // Initialize the channel, NULL means using default options. // options, see `brpc/channel.h'. if (channel.Init(FLAGS_server.c_str(), FLAGS_load_balancer.c_str(), &options) != 0) { LOG(ERROR) << "Fail to initialize channel"; return -1; } 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; } } } if (FLAGS_dummy_port >= 0) { brpc::StartDummyServerAt(FLAGS_dummy_port); } while (!brpc::IsAskedToQuit()) { sleep(1); LOG(INFO) << "Sending EchoRequest at qps=" << g_latency_recorder.qps(1) << " latency=" << g_latency_recorder.latency(1); } 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; }