mariadb-columnstore-engine/utils/messageqcpp/socket.h

/* Copyright (C) 2014 InfiniDB, Inc.

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; version 2 of
   the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   MA 02110-1301, USA. */

/***********************************************************************
 *   $Id: socket.h 3633 2013-03-13 20:50:23Z pleblanc $
 *
 *
 ***********************************************************************/
/** @file */
#pragma once

#include <ctime>
#include <unistd.h>
#include <sys/types.h>
#include <boost/shared_ptr.hpp>
#include "bytestream.h"

class MessageQTestSuite;

namespace messageqcpp
{
class IOSocket;
class SocketParms;

// Might want to expand on this / derive from it to include things like uncompressed
// data size, etc...
class Stats
{
 public:
  Stats() : data_sent(0), data_recvd(0)
  {
  }
  virtual ~Stats()
  {
  }
  virtual uint64_t dataSent()
  {
    return data_sent;
  }
  virtual uint64_t dataRecvd()
  {
    return data_recvd;
  }
  virtual void dataSent(uint64_t amt)
  {
    data_sent += amt;
  }
  virtual void dataRecvd(uint64_t amt)
  {
    data_recvd += amt;
  }

 private:
  uint64_t data_sent;
  uint64_t data_recvd;
};

/** an abstract socket class interface
 *
 */
class Socket
{
 public:
  /** dtor
   *
   */
  virtual ~Socket()
  {
  }

  /** open the socket
   *
   */
  virtual void open() = 0;

  /** read a message from the socket
   *
   * wait for and return a message from the socket. The deafult timeout waits forever. Note that
   * eventhough struct timespec has nanosecond resolution, this method only has millisecond resolution.
   */
  virtual const SBS read(const struct timespec* timeout = 0, bool* isTimeOut = NULL,
                         Stats* stats = NULL) const = 0;

  /** write a message to the socket
   *
   * write a message to the socket
   */
  virtual void write(const ByteStream& msg, Stats* stats = NULL) = 0;
  virtual void write_raw(const ByteStream& msg, Stats* stats = NULL) const = 0;
  virtual void write(SBS msg, Stats* stats = NULL) = 0;

  /** close the socket
   *
   */
  virtual void close() = 0;

  /** bind to a port
   *
   */
  virtual void bind(const struct sockaddr* serv_addr) = 0;

  /** listen for connections
   *
   */
  virtual void listen(int backlog = 5) = 0;

  /** return an (accepted) IOSocket ready for I/O
   *
   */
  virtual const IOSocket accept(const struct timespec* timeout = 0) = 0;

  /** connect to a server socket
   *
   */
  virtual void connect(const sockaddr* serv_addr) = 0;

  /** test if this socket is open
   *
   */
  virtual bool isOpen() const = 0;

  /** get the SocketParms
   *
   */
  virtual const SocketParms socketParms() const = 0;

  /** set the SocketParms
   *
   */
  virtual void socketParms(const SocketParms& socketParms) = 0;

  /** set the sockaddr struct
   *
   */
  virtual void sa(const sockaddr* sa) = 0;

  /** dynamically allocate a copy of this object
   *
   */
  virtual Socket* clone() const = 0;

  /** set the connection timeout (in ms)
   *
   */
  virtual void connectionTimeout(const struct ::timespec* timeout) = 0;

  /** set the connection protocol to be synchronous
   *
   */
  virtual void syncProto(bool use) = 0;

  virtual int getConnectionNum() const = 0;

  /** return the address as a string
   *
   */
  virtual const std::string addr2String() const = 0;

  /** compare 2 addresses
   *
   */
  virtual bool isSameAddr(const Socket* rhs) const = 0;
  virtual bool isSameAddr(const struct in_addr& ipv4Addr) const = 0;

  virtual bool isConnected() const = 0;
  virtual bool hasData() const = 0;

  /*
   * allow test suite access to private data for OOB test
   */
  friend class ::MessageQTestSuite;
};

}  // namespace messageqcpp