cyphesis/server/CommPSQLSocket.cpp

// This file may be redistributed and modified only under the terms of
// the GNU General Public License (See COPYING for details).
// Copyright (C) 2003 Alistair Riddoch

#include "CommPSQLSocket.h"

#include "common/Database.h"
#include "common/log.h"

#include <cassert>

CommPSQLSocket::CommPSQLSocket(CommServer & svr, Database & db) :
                               CommIdleSocket(svr), m_db(db)
{
    // This assumes the database connection is already sorted, which I think
    // is okay
    PGconn * con = m_db.getConnection();
    assert(con != 0);
    
    if (PQsetnonblocking(con, 1) == -1) {
        log(ERROR, "Unable to put database connection in non-blocking mode.");
    }
}

CommPSQLSocket::~CommPSQLSocket()
{
}

int CommPSQLSocket::getFd() const
{
    PGconn * con = m_db.getConnection();
    assert(con != 0);
    return PQsocket(con);
}

bool CommPSQLSocket::eof()
{
    return false;
}

bool CommPSQLSocket::isOpen() const
{
    return true;
}

bool CommPSQLSocket::read()
{
    PGconn * con = m_db.getConnection();
    assert(con != 0);

    if (PQconsumeInput(con) == 0) {
        log(ERROR, "Error reading from database connection.");
        m_db.reportError();
    }

    PGresult * res;
    while ((PQisBusy(con) == 0) && ((res = PQgetResult(m_connection)) != 0)) {
        // FIXME
        // Get and check result against current query using 
        // PQresultStatus(res), PQclear(res). If NULL is read, then
        // we need to signal that the next query can be sent, so the while
        // logic needs to be fixed.
    };

    return false;
}

void CommPSQLSocket::dispatch()
{
    PGconn * con = m_db.getConnection();
    assert(con != 0);

    // FIXME
    // Here we are permited to write the next query, if there is one,
    // and read() allows us to do this.
    // Perhaps PQflush(con); ? Must be called after writing a non-blocking query
}

void CommPSQLSocket::idle(time_t t)
{
}