lang_cmd.cpp
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- /*
- * ===========================================================================
- * PRODUCTION $Log: lang_cmd.cpp,v $
- * PRODUCTION Revision 1000.1 2004/06/01 19:19:44 gouriano
- * PRODUCTION PRODUCTION: UPGRADED [GCC34_MSVC7] Dev-tree R1.9
- * PRODUCTION
- * ===========================================================================
- */
- /* $Id: lang_cmd.cpp,v 1000.1 2004/06/01 19:19:44 gouriano Exp $
- * ===========================================================================
- *
- * PUBLIC DOMAIN NOTICE
- * National Center for Biotechnology Information
- *
- * This software/database is a "United States Government Work" under the
- * terms of the United States Copyright Act. It was written as part of
- * the author's official duties as a United States Government employee and
- * thus cannot be copyrighted. This software/database is freely available
- * to the public for use. The National Library of Medicine and the U.S.
- * Government have not placed any restriction on its use or reproduction.
- *
- * Although all reasonable efforts have been taken to ensure the accuracy
- * and reliability of the software and data, the NLM and the U.S.
- * Government do not and cannot warrant the performance or results that
- * may be obtained by using this software or data. The NLM and the U.S.
- * Government disclaim all warranties, express or implied, including
- * warranties of performance, merchantability or fitness for any particular
- * purpose.
- *
- * Please cite the author in any work or product based on this material.
- *
- * ===========================================================================
- *
- * Author: Vladimir Soussov
- *
- * File Description: CTLib language command
- *
- */
- #include <ncbi_pch.hpp>
- #include <dbapi/driver/ctlib/interfaces.hpp>
- BEGIN_NCBI_SCOPE
- /////////////////////////////////////////////////////////////////////////////
- //
- // CTL_LangCmd::
- //
- CTL_LangCmd::CTL_LangCmd(CTL_Connection* conn, CS_COMMAND* cmd,
- const string& lang_query, unsigned int nof_params)
- : m_Connect(conn),
- m_Cmd(cmd),
- m_Query(lang_query),
- m_Params(nof_params)
- {
- m_WasSent = false;
- m_HasFailed = false;
- m_Res = 0;
- m_RowCount = -1;
- }
- bool CTL_LangCmd::More(const string& query_text)
- {
- m_Query.append(query_text);
- return true;
- }
- bool CTL_LangCmd::BindParam(const string& param_name, CDB_Object* param_ptr)
- {
- return
- m_Params.BindParam(CDB_Params::kNoParamNumber, param_name, param_ptr);
- }
- bool CTL_LangCmd::SetParam(const string& param_name, CDB_Object* param_ptr)
- {
- return
- m_Params.SetParam(CDB_Params::kNoParamNumber, param_name, param_ptr);
- }
- bool CTL_LangCmd::Send()
- {
- if ( m_WasSent ) {
- Cancel();
- }
- m_HasFailed = false;
- switch ( ct_command(m_Cmd, CS_LANG_CMD,
- const_cast<char*> (m_Query.c_str()), CS_NULLTERM,
- CS_END) ) {
- case CS_SUCCEED:
- break;
- case CS_FAIL:
- m_HasFailed = true;
- throw CDB_ClientEx(eDB_Fatal, 120001, "CTL_LangCmd::Send",
- "ct_command failed");
- case CS_BUSY:
- throw CDB_ClientEx(eDB_Error, 120002, "CTL_LangCmd::Send",
- "the connection is busy");
- }
- if ( !x_AssignParams() ) {
- m_HasFailed = true;
- throw CDB_ClientEx(eDB_Error, 120003, "CTL_LangCmd::Send",
- "cannot assign the params");
- }
- switch ( ct_send(m_Cmd) ) {
- case CS_SUCCEED:
- break;
- case CS_FAIL:
- m_HasFailed = true;
- if (ct_cancel(0, m_Cmd, CS_CANCEL_ALL) != CS_SUCCEED) {
- // we need to close this connection
- throw CDB_ClientEx(eDB_Fatal, 120004, "CTL_LangCmd::Send",
- "Unrecoverable crash of ct_send. "
- "Connection must be closed");
- }
- throw CDB_ClientEx(eDB_Error, 120005, "CTL_LangCmd::Send",
- "ct_send failed");
- case CS_CANCELED:
- throw CDB_ClientEx(eDB_Error, 120006, "CTL_LangCmd::Send",
- "command was canceled");
- case CS_BUSY:
- throw CDB_ClientEx(eDB_Error, 120007, "CTL_LangCmd::Send",
- "connection has another request pending");
- case CS_PENDING:
- default:
- m_WasSent = true;
- return false;
- }
- m_WasSent = true;
- return true;
- }
- bool CTL_LangCmd::WasSent() const
- {
- return m_WasSent;
- }
- bool CTL_LangCmd::Cancel()
- {
- if ( m_WasSent ) {
- if ( m_Res ) {
- // to prevent ct_cancel(NULL, m_Cmd, CS_CANCEL_CURRENT) call:
- ((CTL_RowResult*)m_Res)->m_EOR= true;
- delete m_Res;
- m_Res = 0;
- }
- switch ( ct_cancel(0, m_Cmd, CS_CANCEL_ALL) ) {
- case CS_SUCCEED:
- m_WasSent = false;
- return true;
- case CS_FAIL:
- throw CDB_ClientEx(eDB_Error, 120008, "CTL_LangCmd::Cancel",
- "ct_cancel failed");
- case CS_BUSY:
- throw CDB_ClientEx(eDB_Error, 120009, "CTL_LangCmd::Cancel",
- "connection has another request pending");
- default:
- return false;
- }
- }
- m_Query.erase();
- return true;
- }
- bool CTL_LangCmd::WasCanceled() const
- {
- return !m_WasSent;
- }
- CDB_Result* CTL_LangCmd::Result()
- {
- if ( m_Res) {
- delete m_Res;
- m_Res = 0;
- }
- if ( !m_WasSent ) {
- throw CDB_ClientEx(eDB_Error, 120010, "CTL_LangCmd::Result",
- "you need to send a command first");
- }
- for (;;) {
- CS_INT res_type;
- switch ( ct_results(m_Cmd, &res_type) ) {
- case CS_SUCCEED:
- break;
- case CS_END_RESULTS:
- m_WasSent = false;
- return 0;
- case CS_FAIL:
- m_HasFailed = true;
- if (ct_cancel(0, m_Cmd, CS_CANCEL_ALL) != CS_SUCCEED) {
- // we need to close this connection
- throw CDB_ClientEx(eDB_Fatal, 120012, "CTL_LangCmd::Result",
- "Unrecoverable crash of ct_result. "
- "Connection must be closed");
- }
- m_WasSent = false;
- throw CDB_ClientEx(eDB_Error, 120013, "CTL_LangCmd::Result",
- "ct_result failed");
- case CS_CANCELED:
- m_WasSent = false;
- throw CDB_ClientEx(eDB_Error, 120011, "CTL_LangCmd::Result",
- "your command has been canceled");
- case CS_BUSY:
- throw CDB_ClientEx(eDB_Error, 120014, "CTL_LangCmd::Result",
- "connection has another request pending");
- default:
- throw CDB_ClientEx(eDB_Error, 120015, "CTL_LangCmd::Result",
- "your request is pending");
- }
- switch ( res_type ) {
- case CS_CMD_SUCCEED:
- case CS_CMD_DONE: // done with this command
- // check the number of affected rows
- g_CTLIB_GetRowCount(m_Cmd, &m_RowCount);
- continue;
- case CS_CMD_FAIL: // the command has failed
- // check the number of affected rows
- g_CTLIB_GetRowCount(m_Cmd, &m_RowCount);
- m_HasFailed = true;
- throw CDB_ClientEx(eDB_Warning, 120016, "CTL_LangCmd::Result",
- "The server encountered an error while "
- "executing a command");
- case CS_ROW_RESULT:
- m_Res = new CTL_RowResult(m_Cmd);
- break;
- case CS_PARAM_RESULT:
- m_Res = new CTL_ParamResult(m_Cmd);
- break;
- case CS_COMPUTE_RESULT:
- m_Res = new CTL_ComputeResult(m_Cmd);
- break;
- case CS_STATUS_RESULT:
- m_Res = new CTL_StatusResult(m_Cmd);
- break;
- case CS_COMPUTEFMT_RESULT:
- throw CDB_ClientEx(eDB_Info, 120017, "CTL_LangCmd::Result",
- "CS_COMPUTEFMT_RESULT has arrived");
- case CS_ROWFMT_RESULT:
- throw CDB_ClientEx(eDB_Info, 120018, "CTL_LangCmd::Result",
- "CS_ROWFMT_RESULT has arrived");
- case CS_MSG_RESULT:
- throw CDB_ClientEx(eDB_Info, 120019, "CTL_LangCmd::Result",
- "CS_MSG_RESULT has arrived");
- default:
- throw CDB_ClientEx(eDB_Warning, 120020, "CTL_LangCmd::Result",
- "Unexpected result type has arrived");
- }
- return Create_Result(*m_Res);
- }
- }
- void CTL_LangCmd::DumpResults()
- {
- if ( m_Res) {
- delete m_Res;
- m_Res = 0;
- }
- if ( !m_WasSent ) {
- throw CDB_ClientEx(eDB_Error, 120010, "CTL_LangCmd::DumpResults",
- "you need to send a command first");
- }
-
- for (;;) {
- CS_INT res_type;
- switch ( ct_results(m_Cmd, &res_type) ) {
- case CS_SUCCEED:
- break;
- case CS_END_RESULTS:
- m_WasSent = false;
- return;
- case CS_FAIL:
- m_HasFailed = true;
- if (ct_cancel(0, m_Cmd, CS_CANCEL_ALL) != CS_SUCCEED) {
- // we need to close this connection
- throw CDB_ClientEx(eDB_Fatal, 120012, "CTL_LangCmd::DumpResults",
- "Unrecoverable crash of ct_result. "
- "Connection must be closed");
- }
- m_WasSent = false;
- throw CDB_ClientEx(eDB_Error, 120013, "CTL_LangCmd::DumpResults",
- "ct_result failed");
- case CS_CANCELED:
- m_WasSent = false;
- throw CDB_ClientEx(eDB_Error, 120011, "CTL_LangCmd::DumpResults",
- "your command has been canceled");
- case CS_BUSY:
- throw CDB_ClientEx(eDB_Error, 120014, "CTL_LangCmd::DumpResults",
- "connection has another request pending");
- default:
- throw CDB_ClientEx(eDB_Error, 120015, "CTL_LangCmd::DumpResults",
- "your request is pending");
- }
- switch ( res_type ) {
- case CS_CMD_SUCCEED:
- case CS_CMD_DONE: // done with this command
- // check the number of affected rows
- g_CTLIB_GetRowCount(m_Cmd, &m_RowCount);
- continue;
- case CS_CMD_FAIL: // the command has failed
- // check the number of affected rows
- g_CTLIB_GetRowCount(m_Cmd, &m_RowCount);
- m_HasFailed = true;
- throw CDB_ClientEx(eDB_Warning, 120016, "CTL_LangCmd::DumpResults",
- "The server encountered an error while "
- "executing a command");
- case CS_ROW_RESULT:
- m_Res = new CTL_RowResult(m_Cmd);
- break;
- case CS_PARAM_RESULT:
- m_Res = new CTL_ParamResult(m_Cmd);
- break;
- case CS_COMPUTE_RESULT:
- m_Res = new CTL_ComputeResult(m_Cmd);
- break;
- case CS_STATUS_RESULT:
- m_Res = new CTL_StatusResult(m_Cmd);
- break;
- case CS_COMPUTEFMT_RESULT:
- throw CDB_ClientEx(eDB_Info, 120017, "CTL_LangCmd::Result",
- "CS_COMPUTEFMT_RESULT has arrived");
- case CS_ROWFMT_RESULT:
- throw CDB_ClientEx(eDB_Info, 120018, "CTL_LangCmd::Result",
- "CS_ROWFMT_RESULT has arrived");
- case CS_MSG_RESULT:
- throw CDB_ClientEx(eDB_Info, 120019, "CTL_LangCmd::Result",
- "CS_MSG_RESULT has arrived");
- default:
- throw CDB_ClientEx(eDB_Warning, 120020, "CTL_LangCmd::Result",
- "Unexpected result type has arrived");
- }
- if(m_Res) {
- if(m_Connect->m_ResProc) {
- CDB_Result* r= Create_Result(*m_Res);
- m_Connect->m_ResProc->ProcessResult(*r);
- delete r;
- }
- else {
- while(m_Res->Fetch());
- }
- delete m_Res;
- m_Res= 0;
- }
- }
- }
- bool CTL_LangCmd::HasMoreResults() const
- {
- return m_WasSent;
- }
- bool CTL_LangCmd::HasFailed() const
- {
- return m_HasFailed;
- }
- int CTL_LangCmd::RowCount() const
- {
- return m_RowCount;
- }
- void CTL_LangCmd::Release()
- {
- m_BR = 0;
- if ( m_WasSent ) {
- try {
- Cancel();
- }catch (CDB_Exception& ) {}
- m_WasSent = false;
- }
- m_Connect->DropCmd(*this);
- delete this;
- }
- CTL_LangCmd::~CTL_LangCmd()
- {
- if ( m_BR ) {
- *m_BR = 0;
- }
- if ( m_WasSent ) {
- try {
- Cancel();
- } catch (CDB_Exception& ) {
- }
- }
- ct_cmd_drop(m_Cmd);
- }
- bool CTL_LangCmd::x_AssignParams()
- {
- CS_DATAFMT param_fmt;
- memset(¶m_fmt, 0, sizeof(param_fmt));
- param_fmt.namelen = CS_NULLTERM;
- param_fmt.status = CS_INPUTVALUE;
- for (unsigned int i = 0; i < m_Params.NofParams(); i++) {
- if(m_Params.GetParamStatus(i) == 0) continue;
- CDB_Object& param = *m_Params.GetParam(i);
- const string& param_name = m_Params.GetParamName(i);
- CS_SMALLINT indicator = param.IsNULL() ? -1 : 0;
- if ( !g_CTLIB_AssignCmdParam(m_Cmd, param, param_name, param_fmt,
- indicator, false/*!declare_only*/) ) {
- return false;
- }
- }
- return true;
- }
- END_NCBI_SCOPE
- /*
- * ===========================================================================
- * $Log: lang_cmd.cpp,v $
- * Revision 1000.1 2004/06/01 19:19:44 gouriano
- * PRODUCTION: UPGRADED [GCC34_MSVC7] Dev-tree R1.9
- *
- * Revision 1.9 2004/05/17 21:12:03 gorelenk
- * Added include of PCH ncbi_pch.hpp
- *
- * Revision 1.8 2003/10/07 16:09:48 soussov
- * adds code which prevents ct_cancel(NULL, m_Cmd, CS_CANCEL_CURRENT) call if command is canceled while retrieving results
- *
- * Revision 1.7 2003/06/24 18:42:25 soussov
- * removes throwing exception from destructor
- *
- * Revision 1.6 2003/06/05 16:00:31 soussov
- * adds code for DumpResults and for the dumped results processing
- *
- * Revision 1.5 2003/05/16 20:24:24 soussov
- * adds code to skip parameters if it was not set
- *
- * Revision 1.4 2003/01/31 16:49:38 lavr
- * Remove unused variable "e" from catch() clause
- *
- * Revision 1.3 2002/09/16 16:34:16 soussov
- * add try catch when canceling in Release method
- *
- * Revision 1.2 2001/11/06 17:59:55 lavr
- * Formatted uniformly as the rest of the library
- *
- * Revision 1.1 2001/09/21 23:40:02 vakatov
- * ----- Initial (draft) revision. -----
- * This is a major revamp (by Denis Vakatov, with help from Vladimir Soussov)
- * of the DBAPI "driver" libs originally written by Vladimir Soussov.
- * The revamp involved massive code shuffling and grooming, numerous local
- * API redesigns, adding comments and incorporating DBAPI to the C++ Toolkit.
- *
- * ===========================================================================
- */