00001
00002
00003
00004
00005
00006
00007
00008
00009
00010
00011
00012
00013
00014
00015
00016
00017
00018
00019
00020
00021
00022
00023
00024
00025
00026
00027
00028
00029
00030 #include "pqxx/connection_base"
00031 #include "pqxx/isolation"
00032 #include "pqxx/result"
00033
00034
00035
00036
00037
00038 namespace pqxx
00039 {
00040 class connection_base;
00041 class transaction_base;
00042
00043
00044 namespace internal
00045 {
00046 class PQXX_LIBEXPORT transactionfocus : public namedclass
00047 {
00048 public:
00049 transactionfocus(transaction_base &t,
00050 const PGSTD::string &Name,
00051 const PGSTD::string &Classname) :
00052 namedclass(Name, Classname),
00053 m_Trans(t),
00054 m_registered(false)
00055 {
00056 }
00057
00058 protected:
00059 void register_me();
00060 void unregister_me() throw ();
00061 void reg_pending_error(const PGSTD::string &) throw ();
00062 bool registered() const throw () { return m_registered; }
00063
00064 transaction_base &m_Trans;
00065
00066 private:
00067 bool m_registered;
00068
00070 transactionfocus();
00072 transactionfocus(const transactionfocus &);
00074 transactionfocus &operator=(const transactionfocus &);
00075 };
00076 }
00077
00078
00079
00081
00089 class PQXX_LIBEXPORT transaction_base : public internal::namedclass
00090 {
00091
00092 public:
00094 typedef isolation_traits<read_committed> isolation_tag;
00095
00096 virtual ~transaction_base() =0;
00097
00099
00111 void commit();
00112
00114
00117 void abort();
00118
00120
00124 result exec(const char Query[],
00125 const PGSTD::string &Desc=PGSTD::string());
00126
00128
00135 result exec(const PGSTD::string &Query,
00136 const PGSTD::string &Desc=PGSTD::string())
00137 { return exec(Query.c_str(), Desc); }
00138
00140 void process_notice(const char Msg[]) const
00141 { m_Conn.process_notice(Msg); }
00143 void process_notice(const PGSTD::string &Msg) const
00144 { m_Conn.process_notice(Msg); }
00145
00147 connection_base &conn() const { return m_Conn; }
00148
00150
00158 void set_variable(const PGSTD::string &Var, const PGSTD::string &Val);
00159
00161
00167 PGSTD::string get_variable(const PGSTD::string &) const;
00168
00169 #ifdef PQXX_DEPRECATED_HEADERS
00170
00171 void Commit() { commit(); }
00173 void Abort() { abort(); }
00175 result Exec(const char Q[], const PGSTD::string &D=PGSTD::string())
00176 { return exec(Q,D); }
00178 result Exec(const PGSTD::string &Q, const PGSTD::string &D=PGSTD::string())
00179 { return exec(Q,D); }
00181 void ProcessNotice(const char M[]) const { return process_notice(M); }
00183 void ProcessNotice(const PGSTD::string &M) const { return process_notice(M); }
00185 PGSTD::string Name() const { return name(); }
00187 connection_base &Conn() const { return conn(); }
00189 void SetVariable(const PGSTD::string &Var, const PGSTD::string &Val)
00190 { set_variable(Var,Val); }
00191 #endif
00192
00193 protected:
00195
00198 explicit transaction_base(connection_base &,
00199 const PGSTD::string &TName,
00200 const PGSTD::string &CName);
00201
00203
00205 void Begin();
00206
00208 void End() throw ();
00209
00211 virtual void do_begin() =0;
00213 virtual result do_exec(const char Query[]) =0;
00215 virtual void do_commit() =0;
00217 virtual void do_abort() =0;
00218
00219
00220
00222
00230 result DirectExec(const char C[], int Retries=0);
00231
00232 private:
00233
00234
00235
00236
00237
00238
00239
00240
00241
00242
00243
00244
00245
00246
00247
00248
00249
00250 enum Status
00251 {
00252 st_nascent,
00253 st_active,
00254 st_aborted,
00255 st_committed,
00256 st_in_doubt
00257 };
00258
00259
00260 void CheckPendingError();
00261
00262 friend class Cursor;
00263 int GetUniqueCursorNum() { return m_UniqueCursorNum++; }
00264 void MakeEmpty(result &R) const { m_Conn.MakeEmpty(R); }
00265
00266 friend class internal::transactionfocus;
00267 void RegisterFocus(internal::transactionfocus *);
00268 void UnregisterFocus(internal::transactionfocus *) throw ();
00269 void RegisterPendingError(const PGSTD::string &) throw ();
00270 friend class tablereader;
00271 void BeginCopyRead(const PGSTD::string &Table, const PGSTD::string &Columns);
00272 bool ReadCopyLine(PGSTD::string &L) { return m_Conn.ReadCopyLine(L); }
00273 friend class tablewriter;
00274 void BeginCopyWrite(const PGSTD::string &Table,
00275 const PGSTD::string &Columns = PGSTD::string());
00276 bool WriteCopyLine(const PGSTD::string &L, bool async=false)
00277 { return m_Conn.WriteCopyLine(L, async); }
00278 void EndCopyWrite() throw () { m_Conn.EndCopyWrite(); }
00279
00280 friend class pipeline;
00281 void start_exec(const PGSTD::string &Q) { m_Conn.start_exec(Q); }
00282 PGresult *get_result() { return m_Conn.get_result(); }
00283
00284 connection_base &m_Conn;
00285
00286 int m_UniqueCursorNum;
00287 internal::unique<internal::transactionfocus> m_Focus;
00288 Status m_Status;
00289 bool m_Registered;
00290 mutable PGSTD::map<PGSTD::string, PGSTD::string> m_Vars;
00291 PGSTD::string m_PendingError;
00292
00294 transaction_base();
00296 transaction_base(const transaction_base &);
00298 transaction_base &operator=(const transaction_base &);
00299 };
00300
00301 }
00302
00303