88 lines
3.6 KiB
C++
88 lines
3.6 KiB
C++
// 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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// A client sending requests to server every 1 second. If the response does
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// not come back within FLAGS_backup_request_ms, it sends another request
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// and ends the RPC when any response comes back.
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#include <gflags/gflags.h>
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#include <butil/logging.h>
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#include <butil/time.h>
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#include <brpc/channel.h>
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#include "echo.pb.h"
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DEFINE_string(protocol, "baidu_std", "Protocol type. Defined in src/brpc/options.proto");
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DEFINE_string(connection_type, "", "Connection type. Available values: single, pooled, short");
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DEFINE_string(server, "0.0.0.0:8000", "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_int32(backup_request_ms, 2, "Timeout for sending backup request");
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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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// 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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// Initialize the channel, NULL means using default options.
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brpc::ChannelOptions options;
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options.protocol = FLAGS_protocol;
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options.connection_type = FLAGS_connection_type;
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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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options.backup_request_ms = FLAGS_backup_request_ms;
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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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// 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(&channel);
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// Send a request and wait for the response every 1 second.
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int counter = 0;
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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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example::EchoRequest request;
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example::EchoResponse response;
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brpc::Controller cntl;
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request.set_index(++counter);
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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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LOG(INFO) << "Received response[index=" << response.index()
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<< "] from " << cntl.remote_side()
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<< " to " << cntl.local_side()
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<< " latency=" << cntl.latency_us() << "us";
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} else {
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LOG(WARNING) << cntl.ErrorText();
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}
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sleep(1);
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}
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LOG(INFO) << "EchoClient is going to quit";
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return 0;
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}
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