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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"
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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
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00092 Result DirectExec(const char C[], int Retries, const char OnReconnect[]);
00093 Connection &Conn() const { return m_Conn; }
00094
00095
00096 private:
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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