context.cpp

ncbi源码

        }
        return INT_TIMEOUT;
    default:
        break;
    }


    switch (severity) {
    case EXINFO:
    case EXUSER:
        {
            CDB_ClientEx info(eDB_Info, dberr, "dblib", dberrstr);
            hs->PostMsg(&info);
        }
        break;
    case EXNONFATAL:
    case EXCONVERSION:
    case EXSERVER:
    case EXPROGRAM:
        {
            CDB_ClientEx err(eDB_Error, dberr, "dblib", dberrstr);
            hs->PostMsg(&err);
        }
        break;
    case EXTIME:
        {
            CDB_TimeoutEx to(dberr, "dblib", dberrstr);
            hs->PostMsg(&to);
        }
        return INT_TIMEOUT;
    default:
        {
            CDB_ClientEx ftl(eDB_Fatal, dberr, "dblib", dberrstr);
            hs->PostMsg(&ftl);
        }
        break;
    }
    return INT_CANCEL;
}


void CTDSContext::TDS_dbmsg_handler(DBPROCESS*    dblink,   DBINT msgno,
                                    int           msgstate, int   severity,
                                    const string& msgtxt,
                                    const string& srvname,
                                    const string& procname,
                                    int           line)
{
    if (msgno == 5701  ||  msgno == 5703)
        return;

    CTDS_Connection* link = dblink ?
        reinterpret_cast<CTDS_Connection*>(dbgetuserdata(dblink)) : 0;
    CDBHandlerStack* hs   = link ?
        &link->m_MsgHandlers : &m_pTDSContext->m_CntxHandlers;

    if (msgno == 1205/*DEADLOCK*/) {
        CDB_DeadlockEx dl(srvname, msgtxt);
        hs->PostMsg(&dl);
    } else {
        EDB_Severity sev =
            severity <  10 ? eDB_Info :
            severity == 10 ? eDB_Warning :
            severity <  16 ? eDB_Error :
            severity >  16 ? eDB_Fatal :
            eDB_Unknown;
        if (!procname.empty()) {
            CDB_RPCEx rpc(sev, msgno, srvname, msgtxt, procname, line);
            hs->PostMsg(&rpc);
        } else {
            CDB_DSEx m(sev, msgno, srvname, msgtxt);
            hs->PostMsg(&m);
        }
    }
}


DBPROCESS* CTDSContext::x_ConnectToServer(const string&   srv_name,
                                          const string&   user_name,
                                          const string&   passwd,
                                          TConnectionMode mode)
{
    if (!m_HostName.empty())
        DBSETLHOST(m_Login, (char*) m_HostName.c_str());
    if (m_PacketSize > 0)
        DBSETLPACKET(m_Login, m_PacketSize);
    if (DBSETLAPP (m_Login, (char*) m_AppName.c_str())
        != SUCCEED ||
        DBSETLUSER(m_Login, (char*) user_name.c_str())
        != SUCCEED ||
        DBSETLPWD (m_Login, (char*) passwd.c_str())
        != SUCCEED)
        return 0;

    if (mode & fBcpIn)
        BCP_SETL(m_Login, TRUE);
#if 0
    if (mode & fPasswordEncrypted)
        DBSETLENCRYPT(m_Login, TRUE);
#endif

    
    tds_set_timeouts((tds_login*)(m_Login->tds_login), (int)m_LoginTimeout, 
                     (int)m_Timeout, 0 /*(int)m_Timeout*/);
    return dbopen(m_Login, (char*) srv_name.c_str());
}



///////////////////////////////////////////////////////////////////////
// Driver manager related functions
//

I_DriverContext* FTDS_CreateContext(map<string,string>* attr)
{
    DBINT version= DBVERSION_UNKNOWN;

    if(attr) {
        if((*attr)["reuse_context"] == "true" && 
           CTDSContext::m_pTDSContext) {
            return CTDSContext::m_pTDSContext;
        }
            
        string vers= (*attr)["version"];
        if(vers.find("42") != string::npos)
            version= DBVERSION_42;
        else if(vers.find("46") != string::npos)
            version= DBVERSION_46;
        else if(vers.find("70") != string::npos)
            version= DBVERSION_70;
        else if(vers.find("100") != string::npos)
            version= DBVERSION_100;

    }
    CTDSContext* cntx=  new CTDSContext(version);
    if(cntx && attr) {
      string page_size= (*attr)["packet"];
      if(!page_size.empty()) {
	int s= atoi(page_size.c_str());
	cntx->TDS_SetPacketSize(s);
      }
    }
    return cntx;
}


// Version-specific driver name and DLL entry point
#if defined(NCBI_FTDS)
#  if   NCBI_FTDS == 7
#    define NCBI_FTDS_DRV_NAME    "ftds7"
#    define NCBI_FTDS_ENTRY_POINT DBAPI_E_ftds7
#  elif NCBI_FTDS == 8
#    define NCBI_FTDS_DRV_NAME    "ftds8"
#    define NCBI_FTDS_ENTRY_POINT DBAPI_E_ftds8
#  elif
#    error "This version of FreeTDS is not supported"
#  endif
#endif


// NOTE:  we define a generic ("ftds") driver name here -- in order to
//        provide a default, but also to prevent from accidental linking
//        of more than one version of FreeTDS driver to the same application


void DBAPI_RegisterDriver_FTDS(I_DriverMgr& mgr)
{
    mgr.RegisterDriver(NCBI_FTDS_DRV_NAME, FTDS_CreateContext);
    mgr.RegisterDriver("ftds",             FTDS_CreateContext);
}


extern "C" {
    void* NCBI_FTDS_ENTRY_POINT()
    {
        if (dbversion())  return 0;  /* to prevent linking to Sybase dblib */
        return (void*) DBAPI_RegisterDriver_FTDS;
    }

    void* DBAPI_E_ftds()
    {
        return NCBI_FTDS_ENTRY_POINT();
    }
} 


END_NCBI_SCOPE



/*
 * ===========================================================================
 * $Log: context.cpp,v $
 * Revision 1000.3  2004/06/01 19:20:45  gouriano
 * PRODUCTION: UPGRADED [GCC34_MSVC7] Dev-tree R1.26
 *
 * Revision 1.26  2004/05/17 21:13:37  gorelenk
 * Added include of PCH ncbi_pch.hpp
 *
 * Revision 1.25  2004/03/24 13:54:05  friedman
 * Fixed mutex comment
 *
 * Revision 1.24  2004/03/23 19:33:14  friedman
 * Replaced 'static CFastMutex' with DEFINE_STATIC_FAST_MUTEX
 *
 * Revision 1.23  2003/12/18 19:01:35  soussov
 * makes FTDS_CreateContext return an existing context if reuse_context option is set
 *
 * Revision 1.22  2003/11/14 20:46:29  soussov
 * implements DoNotConnect mode
 *
 * Revision 1.21  2003/10/27 17:00:44  soussov
 * adds code to prevent the return of broken connection from the pool
 *
 * Revision 1.20  2003/08/28 19:54:54  soussov
 * allowes print messages go to handler
 *
 * Revision 1.19  2003/07/21 22:00:56  soussov
 * fixes bug whith pool name mismatch in Connect()
 *
 * Revision 1.18  2003/07/17 20:46:30  soussov
 * connections pool improvements
 *
 * Revision 1.17  2003/04/18 20:27:00  soussov
 * fixes typo in Connect for reusable connection with specified connection pool
 *
 * Revision 1.16  2003/04/01 21:50:56  soussov
 * new attribute 'packet=XXX' (where XXX is a packet size) added to FTDS_CreateContext
 *
 * Revision 1.15  2003/03/17 15:29:38  soussov
 * sets the default host name using gethostname()
 *
 * Revision 1.14  2002/12/20 18:01:38  soussov
 * renames the members of ECapability enum
 *
 * Revision 1.13  2002/12/13 21:59:10  vakatov
 * Provide FreeTDS-version specific driver name and DLL entry point
 * ("ftds7" or "ftds8" in addition to the generic "ftds").
 * On the way, put a safeguard against accidental linking of more than
 * one version of FreeTDS driver to the same application.
 *
 * Revision 1.12  2002/09/19 18:53:13  soussov
 * check if driver was linked to Sybase dblib added
 *
 * Revision 1.10  2002/04/19 15:08:06  soussov
 * adds static mutex to Connect
 *
 * Revision 1.9  2002/04/12 22:13:01  soussov
 * mutex protection for contex constructor added
 *
 * Revision 1.8  2002/03/26 15:35:10  soussov
 * new image/text operations added
 *
 * Revision 1.7  2002/01/28 19:59:00  soussov
 * removing the long query timout
 *
 * Revision 1.6  2002/01/17 22:14:40  soussov
 * changes driver registration
 *
 * Revision 1.5  2002/01/15 17:13:30  soussov
 * renaming 'tds' driver to 'ftds' driver
 *
 * Revision 1.4  2002/01/14 20:38:48  soussov
 * timeout support for tds added
 *
 * Revision 1.3  2002/01/11 20:25:46  soussov
 * driver manager support added
 *
 * Revision 1.2  2001/11/06 18:00:02  lavr
 * Formatted uniformly as the rest of the library
 *
 * Revision 1.1  2001/10/25 00:39:22  vakatov
 * Initial revision
 *
 * Revision 1.2  2001/10/22 18:38:49  soussov
 * sending NULL instead of emty string fixed
 *
 * Revision 1.1  2001/10/22 15:19:55  lavr
 * This is a major revamp (by Anton Lavrentiev, with help from Vladimir
 * Soussov and Denis Vakatov) of the DBAPI "driver" libs originally
 * written by Vladimir Soussov. The revamp follows the one of CTLib
 * driver, and it involved massive code shuffling and grooming, numerous
 * local API redesigns, adding comments and incorporating DBAPI to
 * the C++ Toolkit.
 *
 * ===========================================================================
 */