grpc/test/cpp/qps/json_run_localhost.cc

/*
 *
 * Copyright 2015-2016, Google Inc.
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 *
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 * notice, this list of conditions and the following disclaimer.
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 * in the documentation and/or other materials provided with the
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#include <memory>
#include <sstream>
#include <string>

#include <grpc/support/log.h>

#include "src/core/lib/support/env.h"
#include "test/core/util/port.h"
#include "test/cpp/util/subprocess.h"

using grpc::SubProcess;

template <class T>
std::string as_string(const T& val) {
  std::ostringstream out;
  out << val;
  return out.str();
}

int main(int argc, char** argv) {
  typedef std::unique_ptr<SubProcess> SubProcessPtr;
  std::vector<SubProcessPtr> jobs;

  std::string my_bin = argv[0];
  std::string bin_dir = my_bin.substr(0, my_bin.rfind('/'));

  std::ostringstream env;
  bool first = true;

  for (int i = 0; i < 2; i++) {
    auto port = grpc_pick_unused_port_or_die();
    std::vector<std::string> args = {bin_dir + "/qps_worker", "-driver_port",
                                     as_string(port)};
    jobs.emplace_back(new SubProcess(args));
    if (!first) env << ",";
    env << "localhost:" << port;
    first = false;
  }

  gpr_setenv("QPS_WORKERS", env.str().c_str());
  std::vector<std::string> args = {bin_dir + "/qps_json_driver"};
  for (int i = 1; i < argc; i++) {
    args.push_back(argv[i]);
  }
  GPR_ASSERT(SubProcess(args).Join() == 0);

  for (auto it = jobs.begin(); it != jobs.end(); ++it) {
    (*it)->Interrupt();
  }
  for (auto it = jobs.begin(); it != jobs.end(); ++it) {
    (*it)->Join();
  }
}