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transaction.hxx

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00001 /*-------------------------------------------------------------------------
00002  *
00003  *   FILE
00004  *      pqxx/transaction.hxx
00005  *
00006  *   DESCRIPTION
00007  *      definition of the pqxx::transaction class.
00008  *   pqxx::transaction represents a standard database transaction
00009  *   DO NOT INCLUDE THIS FILE DIRECTLY; include pqxx/transaction instead.
00010  *
00011  * Copyright (c) 2001-2005, Jeroen T. Vermeulen <jtv@xs4all.nl>
00012  *
00013  * See COPYING for copyright license.  If you did not receive a file called
00014  * COPYING with this source code, please notify the distributor of this mistake,
00015  * or contact the author.
00016  *
00017  *-------------------------------------------------------------------------
00018  */
00019 #include "pqxx/libcompiler.h"
00020 
00021 
00022 #include "pqxx/dbtransaction"
00023 
00024 
00025 
00026 /* Methods tested in eg. self-test program test1 are marked with "//[t1]"
00027  */
00028 
00029 
00030 namespace pqxx
00031 {
00032 
00033 class PQXX_LIBEXPORT basic_transaction : public dbtransaction
00034 {
00035 protected:
00036   explicit basic_transaction(connection_base &C,
00037                              const PGSTD::string &IsolationLevel,
00038                              const PGSTD::string &TName);               //[t1]
00039 
00040 private:
00041   virtual void do_begin();                                              //[t1]
00042   virtual void do_commit();                                             //[t1]
00043   virtual void do_abort();                                              //[t13]
00044 };
00045 
00046 
00048 
00076 template<isolation_level ISOLATIONLEVEL=read_committed>
00077 class transaction : public basic_transaction
00078 {
00079 public:
00080   typedef isolation_traits<ISOLATIONLEVEL> isolation_tag;
00081 
00083 
00088   explicit transaction(connection_base &C, const PGSTD::string &TName): //[t1]
00089     basic_transaction(C, isolation_tag::name(), TName)
00090         { Begin(); }
00091 
00092   explicit transaction(connection_base &C) :                            //[t1]
00093     basic_transaction(C, isolation_tag::name(), PGSTD::string())
00094         { Begin(); }
00095 
00096   virtual ~transaction() throw ()
00097   {
00098 #ifdef PQXX_QUIET_DESTRUCTORS
00099     internal::disable_noticer Quiet(conn());
00100 #endif
00101     End();
00102   }
00103 
00104 protected:
00105   virtual const char *classname() const throw () { return "transaction"; }
00106 };
00107 
00108 
00110 typedef transaction<> work;
00111 
00112 }
00113 
00114 

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