server.h

/* Copyright (c) 2021 OceanBase and/or its affiliates. All rights reserved.
miniob is licensed under Mulan PSL v2.
You can use this software according to the terms and conditions of the Mulan PSL v2.
You may obtain a copy of Mulan PSL v2 at:
         http://license.coscl.org.cn/MulanPSL2
THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
See the Mulan PSL v2 for more details. */
 
//
// Created by Longda on 2021/4/1.
//
 
#pragma once
 
#include "net/server_param.h"
 
class Communicator;
class ThreadHandler;
 
class Server
{
public:
  Server(const ServerParam &input_server_param) : server_param_(input_server_param) {}
  virtual ~Server() {}
 
  virtual int  serve()    = 0;
  virtual void shutdown() = 0;
 
protected:
  ServerParam server_param_;  
};
 
class NetServer : public Server
{
public:
  NetServer(const ServerParam &input_server_param);
  virtual ~NetServer();
 
public:
  int  serve() override;
  void shutdown() override;
 
private:
  void accept(int fd);
 
private:
  int set_non_block(int fd);
 
  int start();
 
  int start_tcp_server();
 
  int start_unix_socket_server();
 
private:
  volatile bool started_ = false;
 
  int server_socket_ = -1;  
 
  CommunicatorFactory communicator_factory_;  
  ThreadHandler      *thread_handler_ = nullptr;
};
 
class CliServer : public Server
{
public:
  CliServer(const ServerParam &input_server_param);
  virtual ~CliServer();
 
  int  serve() override;
  void shutdown() override;
 
private:
  volatile bool started_ = false;
};