Ctx.hpp
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上传日期:2022-05-23
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- /* Copyright (C) 2003 MySQL AB
- 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; either version 2 of the License, or
- (at your option) any later version.
- 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
- #ifndef ODBC_COMMON_Ctx_hpp
- #define ODBC_COMMON_Ctx_hpp
- #include <NdbDictionary.hpp>
- class Ndb;
- class NdbConnection;
- class NdbOperation;
- class NdbSchemaCon;
- class NdbSchemaOp;
- class NdbError;
- class Sqlstate;
- class DiagArea;
- class CtxOwner;
- #ifndef MAX_PATH
- #define MAX_PATH 1024
- #endif
- /**
- * @class Error
- * @brief Sql state, error codes, and message
- */
- struct Error {
- enum {
- Gen = NDB_ODBC_ERROR_MIN + 1 // unclassified
- };
- explicit Error(const Sqlstate& sqlstate);
- const Sqlstate& m_sqlstate;
- int m_status;
- int m_classification;
- int m_code;
- const char* m_message;
- const char* m_sqlFunction;
- bool driverError() const;
- };
- inline
- Error::Error(const Sqlstate& sqlstate) :
- m_sqlstate(sqlstate),
- m_status(0),
- m_classification(0),
- m_code(0),
- m_sqlFunction(0)
- {
- }
- inline bool
- Error::driverError() const
- {
- return NDB_ODBC_ERROR_MIN <= m_code && m_code < NDB_ODBC_ERROR_MAX;
- }
- #define ctx_assert(x)
- do { if (x) break; throw CtxAssert(__FILE__, __LINE__); } while (0)
- /**
- * @class Assert
- * @brief Assert thrown
- */
- class CtxAssert {
- public:
- CtxAssert(const char* file, int line);
- const char* const m_file;
- const int m_line;
- };
- /**
- * @class Ctx
- * @brief Context for one ODBC SQL function
- *
- * Local to the function (not member of the handle) because methods on
- * a handle can call methods on other handles. Created in driver/
- * before method calls and saved under the handle on return. Contains
- * diag area for the function. Also used as logger.
- */
- class Ctx {
- public:
- Ctx();
- ~Ctx();
- // handle exceptions
- void handleEx(CtxAssert& ctxAssert);
- // logging methods
- int logLevel() const;
- void log(const char* fmt, ...) PRINTFLIKE(2,3);
- void logSqlEnter(const char* sqlFunction);
- void logSqlExit();
- const char* sqlFunction() const;
- void print(const char* fmt, ...) PRINTFLIKE(2,3);
- void print(int level, const char* fmt, ...) PRINTFLIKE(3,4);
- // diagnostics area.
- DiagArea& diagArea() const;
- DiagArea& diagArea();
- SQLRETURN getCode() const;
- void setCode(SQLRETURN ret);
- // push diagnostic record
- void pushStatus(const Sqlstate& state, SQLINTEGER code, const char* fmt, ...) PRINTFLIKE(4,5);
- void pushStatus(SQLINTEGER code, const char* fmt, ...) PRINTFLIKE(3,4);
- void pushStatus(const NdbError& ndbError, const char* fmt, ...) PRINTFLIKE(3,4);
- void pushStatus(const Ndb* ndb, const char* fmt, ...) PRINTFLIKE(3,4);
- void pushStatus(const Ndb* ndb, const NdbConnection* tcon, const NdbOperation* op, const char* fmt, ...) PRINTFLIKE(5,6);
- void pushStatus(const Ndb* ndb, const NdbSchemaCon* scon, const NdbSchemaOp* op, const char* fmt, ...) PRINTFLIKE(5,6);
- // check if we should continue executing.
- bool ok();
- private:
- static int m_logLevel;
- static char m_szTraceFile[MAX_PATH];
- char m_sqlFunction[32]; // max needed is 20
- DiagArea* m_diagArea;
- };
- inline int
- Ctx::logLevel() const
- {
- return m_logLevel;
- }
- inline const char*
- Ctx::sqlFunction() const
- {
- return m_sqlFunction;
- }
- // logging macros can be used only when ctx is in scope
- #define ctx_logN(n, x)
- do { if (ctx.logLevel() < (n)) break; ctx.log x; } while (0)
- #if NDB_ODBC_MAX_LOG_LEVEL >= 0
- #define ctx_log0(x) ctx_logN(0, x)
- #else
- #define ctx_log0(x)
- #endif
- #if NDB_ODBC_MAX_LOG_LEVEL >= 1
- #define ctx_log1(x) ctx_logN(1, x)
- #else
- #define ctx_log1(x)
- #endif
- #if NDB_ODBC_MAX_LOG_LEVEL >= 2
- #define ctx_log2(x) ctx_logN(2, x)
- #else
- #define ctx_log2(x)
- #endif
- #if NDB_ODBC_MAX_LOG_LEVEL >= 3
- #define ctx_log3(x) ctx_logN(3, x)
- #else
- #define ctx_log3(x)
- #endif
- #if NDB_ODBC_MAX_LOG_LEVEL >= 4
- #define ctx_log4(x) ctx_logN(4, x)
- #else
- #define ctx_log4(x)
- #endif
- #if NDB_ODBC_MAX_LOG_LEVEL >= 5
- #define ctx_log5(x) ctx_logN(5, x)
- #else
- #define ctx_log5(x)
- #endif
- #endif