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 */
#ifndef MESSAGEQCPP_SOCKET_H
#define MESSAGEQCPP_SOCKET_H

#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 const 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 const int getConnectionNum() const = 0;

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

    /** compare 2 addresses
     *
     */
    virtual const bool isSameAddr(const Socket* rhs) 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

#endif //MESSAGEQCPP_SOCKET_H