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// Copyright (c) 2018 brpc authors.
//
// 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 every 1 second using grpc.
// Authors: Jiashun Zhu(zhujiashun@bilibili.com)
#include <gflags/gflags.h>
#include <butil/logging.h>
#include <butil/time.h>
#include <brpc/channel.h>
#include "helloworld.pb.h"
DEFINE_string(protocol, "h2:grpc", "Protocol type. Defined in src/brpc/options.proto");
DEFINE_string(server, "0.0.0.0:50051", "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_int32(interval_ms, 1000, "Milliseconds between consecutive requests");
DEFINE_bool(gzip, false, "compress body using gzip");
int main(int argc, char* argv[]) {
// Parse gflags. We recommend you to use gflags as well.
GFLAGS_NS::ParseCommandLineFlags(&argc, &argv, true);
if (FLAGS_gzip) {
GFLAGS_NS::SetCommandLineOption("http_body_compress_threshold", 0);
}
// 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;
// Initialize the channel, NULL means using default options.
brpc::ChannelOptions options;
options.protocol = FLAGS_protocol;
options.timeout_ms = FLAGS_timeout_ms/*milliseconds*/;
options.max_retry = FLAGS_max_retry;
if (channel.Init(FLAGS_server.c_str(), FLAGS_load_balancer.c_str(), &options) != 0) {
LOG(ERROR) << "Fail to initialize channel";
return -1;
}
// 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.
helloworld::Greeter_Stub stub(&channel);
// Send a request and wait for the response every 1 second.
while (!brpc::IsAskedToQuit()) {
// We will receive response synchronously, safe to put variables
// on stack.
helloworld::HelloRequest request;
helloworld::HelloReply response;
brpc::Controller cntl;
request.set_name("grpc_req_from_brpc");
if (FLAGS_gzip) {
cntl.set_request_compress_type(brpc::COMPRESS_TYPE_GZIP);
}
// Because `done'(last parameter) is NULL, this function waits until
// the response comes back or error occurs(including timedout).
stub.SayHello(&cntl, &request, &response, NULL);
if (!cntl.Failed()) {
LOG(INFO) << "Received response from " << cntl.remote_side()
<< " to " << cntl.local_side()
<< ": " << response.message()
<< " latency=" << cntl.latency_us() << "us";
} else {
LOG(WARNING) << cntl.ErrorText();
}
usleep(FLAGS_interval_ms * 1000L);
}
return 0;
}