Function main

example/baidu_proxy_and_generic_call/client.cpp:35–94

DEFINE_int32(interval_ms, 1000, "Milliseconds between consecutive requests");

int main(int argc, char* argv[]) {
    // Parse gflags. We recommend you to use gflags as well.
    GFLAGS_NAMESPACE::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;
    
    // Initialize the channel, NULL means using default options.
    brpc::ChannelOptions options;
    options.protocol = brpc::PROTOCOL_BAIDU_STD;
    options.connection_type = FLAGS_connection_type;
    options.timeout_ms = FLAGS_timeout_ms/*milliseconds*/;
    options.max_retry = FLAGS_max_retry;
    if (channel.Init(FLAGS_proxy_address.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.
    example::EchoService_Stub stub(&channel);

    // 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");
        cntl.set_request_compress_type((brpc::CompressType)FLAGS_compress_type);

        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(INFO) << "Received response from " << cntl.remote_side()
                << " to " << cntl.local_side()
                << ": " << response.message()
                << ", response compress type=" << cntl.response_compress_type()
                << ", attached=" << cntl.response_attachment()
                << ", latency=" << cntl.latency_us() << "us";
        } else {
            LOG(WARNING) << cntl.ErrorText();
        }
        usleep(FLAGS_interval_ms * 1000L);
    }

    LOG(INFO) << "EchoClient is going to quit";