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00015 #ifndef PQXX_TRANSACTIONITF_H
00016 #define PQXX_TRANSACTIONITF_H
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00029 #include "pqxx/connection.h"
00030 #include "pqxx/util.h"
00031 
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00034 
00035 
00036 namespace pqxx
00037 {
00038 class Connection;       
00039 class Result;           
00040 class TableStream;      
00041 
00042 
00043 template<> inline PGSTD::string Classname(const TableStream *) 
00044 { 
00045   return "TableStream"; 
00046 }
00047 
00048 
00050 
00054 class PQXX_LIBEXPORT TransactionItf
00055 {
00056 public:
00057   virtual ~TransactionItf() =0;                                         
00058 
00059   void Commit();                                                        
00060   void Abort();                                                         
00061 
00063   Result Exec(const char[]);                                            
00064 
00065   void ProcessNotice(const char Msg[]) { m_Conn.ProcessNotice(Msg); }   
00066   void ProcessNotice(PGSTD::string Msg) { m_Conn.ProcessNotice(Msg); }  
00067 
00068   PGSTD::string Name() const { return m_Name; }                         
00069 
00070 protected:
00073   explicit TransactionItf(Connection &, 
00074                           PGSTD::string Name=PGSTD::string());
00075 
00078   void Begin();
00079 
00081   void End() throw ();
00082 
00084   virtual void DoBegin() =0;
00085   virtual Result DoExec(const char C[]) =0;
00086   virtual void DoCommit() =0;
00087   virtual void DoAbort() =0;
00088 
00089   
00090 
00092   Result DirectExec(const char C[], int Retries, const char OnReconnect[]);
00093   Connection &Conn() const { return m_Conn; }
00094 
00095  
00096 private:
00097   
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00114   enum Status 
00115   { 
00116     st_nascent, 
00117     st_active, 
00118     st_aborted, 
00119     st_committed,
00120     st_in_doubt
00121   };
00122 
00123 
00124   friend class Cursor;
00125   int GetUniqueCursorNum() { return m_UniqueCursorNum++; }
00126   void MakeEmpty(Result &R) const { m_Conn.MakeEmpty(R); }
00127 
00128   friend class TableStream;
00129   void RegisterStream(const TableStream *);
00130   void UnregisterStream(const TableStream *) throw ();
00131   void EndCopy() { m_Conn.EndCopy(); }
00132   friend class TableReader;
00133   void BeginCopyRead(PGSTD::string Table) { m_Conn.BeginCopyRead(Table); }
00134   bool ReadCopyLine(PGSTD::string &L) { return m_Conn.ReadCopyLine(L); }
00135   friend class TableWriter;
00136   void BeginCopyWrite(PGSTD::string Table) {m_Conn.BeginCopyWrite(Table);}
00137   void WriteCopyLine(PGSTD::string L) { m_Conn.WriteCopyLine(L); }
00138 
00139   Connection &m_Conn;
00140 
00141   PGSTD::string m_Name;
00142   int m_UniqueCursorNum;
00143   Unique<TableStream> m_Stream;
00144   Status m_Status;
00145   bool m_Registered;
00146 
00147   
00148   TransactionItf();
00149   TransactionItf(const TransactionItf &);
00150   TransactionItf &operator=(const TransactionItf &);
00151 };
00152 
00153 
00155 
00161 class PQXX_LIBEXPORT in_doubt_error : public PGSTD::runtime_error
00162 {
00163 public:
00164   explicit in_doubt_error(const PGSTD::string &whatarg) : 
00165     PGSTD::runtime_error(whatarg) {}
00166 };
00167 
00168 }
00169 
00170 #endif
00171