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-// Licensed to the Apache Software Foundation (ASF) under one
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-// or more contributor license agreements. See the NOTICE file
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-// distributed with this work for additional information
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-// regarding copyright ownership. The ASF licenses this file
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-// to you under the Apache License, Version 2.0 (the
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-// "License"); you may not use this file except in compliance
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-// with the License. You may obtain a copy of the License at
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-//
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-// http://www.apache.org/licenses/LICENSE-2.0
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-//
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-// Unless required by applicable law or agreed to in writing,
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-// software distributed under the License is distributed on an
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-// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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-// KIND, either express or implied. See the License for the
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-// specific language governing permissions and limitations
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-// under the License.
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-
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-// A client sending requests to server by multiple threads.
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-
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-#include <gflags/gflags.h>
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-#include <bthread/bthread.h>
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-#include <butil/logging.h>
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-#include <brpc/server.h>
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-#include <brpc/channel.h>
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-#include "echo.pb.h"
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-#include <bvar/bvar.h>
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-
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-DEFINE_int32(thread_num, 50, "Number of threads to send requests");
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-DEFINE_bool(use_bthread, false, "Use bthread to send requests");
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-DEFINE_int32(attachment_size, 0, "Carry so many byte attachment along with requests");
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-DEFINE_int32(request_size, 16, "Bytes of each request");
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-DEFINE_string(server, "0.0.0.0:8002", "IP Address of server");
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-DEFINE_string(load_balancer, "", "The algorithm for load balancing");
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-DEFINE_int32(timeout_ms, 100, "RPC timeout in milliseconds");
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-DEFINE_int32(max_retry, 3, "Max retries(not including the first RPC)");
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-DEFINE_bool(dont_fail, false, "Print fatal when some call failed");
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-DEFINE_int32(dummy_port, -1, "Launch dummy server at this port");
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-
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-std::string g_request;
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-std::string g_attachment;
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-
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-bvar::LatencyRecorder g_latency_recorder("client");
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-bvar::Adder<int> g_error_count("client_error_count");
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-
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-static void* sender(void* arg) {
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- // Normally, you should not call a Channel directly, but instead construct
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- // a stub Service wrapping it. stub can be shared by all threads as well.
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- example::EchoService_Stub stub(static_cast<google::protobuf::RpcChannel*>(arg));
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-
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- int log_id = 0;
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- example::EchoRequest request;
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- example::EchoResponse response;
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- brpc::Controller cntl;
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- while (!brpc::IsAskedToQuit()) {
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- // We will receive response synchronously, safe to put variables
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- // on stack.
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- request.Clear();
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- response.Clear();
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- cntl.Reset();
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-
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- request.set_message(g_request);
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- cntl.set_log_id(log_id++); // set by user
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- if (!g_attachment.empty()) {
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- // Set attachment which is wired to network directly instead of
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- // being serialized into protobuf messages.
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- cntl.request_attachment().append(g_attachment);
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- }
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-
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- // Because `done'(last parameter) is NULL, this function waits until
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- // the response comes back or error occurs(including timedout).
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- stub.Echo(&cntl, &request, &response, NULL);
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- if (!cntl.Failed()) {
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- g_latency_recorder << cntl.latency_us();
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- } else {
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- g_error_count << 1;
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- CHECK(brpc::IsAskedToQuit() || !FLAGS_dont_fail)
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- << "error=" << cntl.ErrorText() << " latency=" << cntl.latency_us();
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- // We can't connect to the server, sleep a while. Notice that this
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- // is a specific sleeping to prevent this thread from spinning too
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- // fast. You should continue the business logic in a production
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- // server rather than sleeping.
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- bthread_usleep(50000);
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- }
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- }
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- return NULL;
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-}
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-
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-int main(int argc, char* argv[]) {
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- // Parse gflags. We recommend you to use gflags as well.
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- GFLAGS_NS::ParseCommandLineFlags(&argc, &argv, true);
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-
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- // A Channel represents a communication line to a Server. Notice that
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- // Channel is thread-safe and can be shared by all threads in your program.
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- brpc::Channel channel;
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-
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- // Initialize the channel, NULL means using default options.
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- brpc::ChannelOptions options;
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- options.protocol = "nshead_mcpack";
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- options.timeout_ms = FLAGS_timeout_ms/*milliseconds*/;
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- options.max_retry = FLAGS_max_retry;
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- if (channel.Init(FLAGS_server.c_str(), FLAGS_load_balancer.c_str(), &options) != 0) {
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- LOG(ERROR) << "Fail to initialize channel";
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- return -1;
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- }
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-
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- if (FLAGS_attachment_size > 0) {
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- g_attachment.resize(FLAGS_attachment_size, 'a');
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- }
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- if (FLAGS_request_size <= 0) {
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- LOG(ERROR) << "Bad request_size=" << FLAGS_request_size;
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- return -1;
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- }
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- g_request.resize(FLAGS_request_size, 'r');
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-
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- if (FLAGS_dummy_port >= 0) {
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- brpc::StartDummyServerAt(FLAGS_dummy_port);
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- }
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-
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- std::vector<bthread_t> bids;
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- std::vector<pthread_t> pids;
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- if (!FLAGS_use_bthread) {
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- pids.resize(FLAGS_thread_num);
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- for (int i = 0; i < FLAGS_thread_num; ++i) {
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- if (pthread_create(&pids[i], NULL, sender, &channel) != 0) {
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- LOG(ERROR) << "Fail to create pthread";
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- return -1;
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- }
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- }
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- } else {
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- bids.resize(FLAGS_thread_num);
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- for (int i = 0; i < FLAGS_thread_num; ++i) {
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- if (bthread_start_background(
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- &bids[i], NULL, sender, &channel) != 0) {
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- LOG(ERROR) << "Fail to create bthread";
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- return -1;
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- }
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- }
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- }
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-
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- while (!brpc::IsAskedToQuit()) {
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- sleep(1);
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- LOG(INFO) << "Sending requests at qps=" << g_latency_recorder.qps(1)
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- << " latency=" << g_latency_recorder.latency(1);
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- }
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-
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- LOG(INFO) << "EchoClient is going to quit";
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- for (int i = 0; i < FLAGS_thread_num; ++i) {
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- if (!FLAGS_use_bthread) {
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- pthread_join(pids[i], NULL);
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- } else {
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- bthread_join(bids[i], NULL);
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- }
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- }
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-
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- return 0;
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-}
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