From 2d0f36c84b50cce549ad76307cda56c4506f1a49 Mon Sep 17 00:00:00 2001
From: Craig Tiller <craig.tiller@gmail.com>
Date: Mon, 23 Feb 2015 23:16:17 -0800
Subject: Driver to client/server kind of works

---
 test/cpp/qps/driver.cc | 125 +++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 122 insertions(+), 3 deletions(-)

(limited to 'test/cpp/qps/driver.cc')

diff --git a/test/cpp/qps/driver.cc b/test/cpp/qps/driver.cc
index e7fc46b9e8..098860610c 100644
--- a/test/cpp/qps/driver.cc
+++ b/test/cpp/qps/driver.cc
@@ -35,9 +35,33 @@
 #include "src/core/support/env.h"
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
+#include <grpc/support/host_port.h>
+#include <grpc++/channel_arguments.h>
+#include <grpc++/client_context.h>
+#include <grpc++/create_channel.h>
+#include <grpc++/stream.h>
+#include <list>
+#include <thread>
+#include <vector>
 
+using std::list;
+using std::thread;
+using std::unique_ptr;
 using std::vector;
 using grpc::string;
+using grpc::ChannelArguments;
+using grpc::ClientContext;
+using grpc::ClientReaderWriter;
+using grpc::CreateChannelDeprecated;
+using grpc::Status;
+using grpc::testing::ClientArgs;
+using grpc::testing::ClientConfig;
+using grpc::testing::ClientResult;
+using grpc::testing::QpsClient;
+using grpc::testing::QpsServer;
+using grpc::testing::ServerArgs;
+using grpc::testing::ServerConfig;
+using grpc::testing::ServerStatus;
 
 static vector<string> get_hosts(const string& name) {
   char* env = gpr_getenv(name.c_str());
@@ -58,12 +82,107 @@ static vector<string> get_hosts(const string& name) {
   }
 }
 
-void RunScenario(const grpc::testing::ClientArgs& client_args, size_t num_clients,
-                 const grpc::testing::ServerArgs& server_args,
-                 size_t num_servers) {
+void RunScenario(const ClientConfig& client_config, size_t num_clients,
+                 const ServerConfig& server_config, size_t num_servers) {
+  // ClientContext allocator (all are destroyed at scope exit)
+  list<ClientContext> contexts;
+  auto alloc_context = [&contexts]() {
+  	contexts.emplace_back();
+  	return &contexts.back();
+  };
+
+  // Get client, server lists
   auto clients = get_hosts("QPS_CLIENTS");
   auto servers = get_hosts("QPS_SERVERS");
 
   GPR_ASSERT(clients.size() >= num_clients);
   GPR_ASSERT(servers.size() >= num_servers);
+
+  // Trim to just what we need
+  clients.resize(num_clients);
+  servers.resize(num_servers);
+
+  // Start servers
+  vector<unique_ptr<QpsServer::Stub>> server_stubs;
+  vector<unique_ptr<ClientReaderWriter<ServerArgs, ServerStatus>>> server_streams;
+  vector<string> server_targets;
+  for (const auto& target : servers) {
+  	server_stubs.push_back(QpsServer::NewStub(CreateChannelDeprecated(target, ChannelArguments())));
+  	auto* stub = server_stubs.back().get();
+  	ServerArgs args;
+  	*args.mutable_config() = server_config;
+  	server_streams.push_back(stub->RunServer(alloc_context()));
+  	auto* stream = server_streams.back().get();
+  	if (!stream->Write(args)) {
+  	  gpr_log(GPR_ERROR, "Failed starting server");
+  	  return;
+  	}
+  	ServerStatus init_status;
+  	if (!stream->Read(&init_status)) {
+  	  gpr_log(GPR_ERROR, "Failed starting server");
+  	  return;
+  	}
+  	char* host;
+  	char* driver_port;
+  	char* cli_target;
+  	gpr_split_host_port(target.c_str(), &host, &driver_port);
+  	gpr_join_host_port(&cli_target, host, init_status.port());
+  	server_targets.push_back(cli_target);
+  	gpr_free(host);
+  	gpr_free(driver_port);
+  	gpr_free(cli_target);
+  }
+
+  // Start clients
+  class Client {
+   public:
+   	Client(ClientContext* ctx, const string& target, const ClientArgs& args)
+   	  : thread_([ctx, target, args, this]() {
+   	  	auto stub = QpsClient::NewStub(CreateChannelDeprecated(target, ChannelArguments()));
+   	  	status_ = stub->RunTest(ctx, args, &result_);
+   	  }) {}
+
+   	~Client() { join(); }
+
+   	void join() { if (!joined_) { thread_.join(); joined_ = true; } }
+
+   	const Status& status() const { return status_; }
+   	const ClientResult& result() const { return result_; }
+
+   private:
+   	bool joined_ = false;
+   	Status status_;
+   	ClientResult result_;
+   	thread thread_;
+  };
+  list<Client> running_clients;
+  size_t svr_idx = 0;
+  for (const auto& target : clients) {
+  	ClientArgs args;
+  	*args.mutable_config() = client_config;
+  	for (size_t i = 0; i < num_servers; i++) {
+  	  args.add_server_targets(server_targets[svr_idx]);
+  	  svr_idx = (svr_idx + 1) % num_servers;
+  	}
+
+  	running_clients.emplace_back(alloc_context(), target, args);
+  }
+
+  // Finish clients
+  for (auto& client : running_clients) {
+  	client.join();
+  	if (!client.status().IsOk()) {
+  	  gpr_log(GPR_ERROR, "Client failed");
+  	  return;
+  	}
+  }
+
+  // Finish servers
+  for (auto& stream : server_streams) {
+  	ServerStatus final_status;
+  	ServerStatus dummy;
+  	if (!stream->WritesDone() || !stream->Read(&final_status) || stream->Read(&dummy) || !stream->Finish().IsOk()) {
+  	  gpr_log(GPR_ERROR, "Server protocol error");
+  	}
+  }
 }
-- 
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