libpqxx 4.0.1

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robusttransaction.hxx
1 /*-------------------------------------------------------------------------
2 *
3 * FILE
4 * pqxx/robusttransaction.hxx
5 *
6 * DESCRIPTION
7 * definition of the pqxx::robusttransaction class.
8 * pqxx::robusttransaction is a slower but safer transaction class
9 * DO NOT INCLUDE THIS FILE DIRECTLY; include pqxx/robusttransaction instead.
10 *
11 * Copyright (c) 2002-2011, Jeroen T. Vermeulen <jtv@xs4all.nl>
12 *
13 * See COPYING for copyright license. If you did not receive a file called
14 * COPYING with this source code, please notify the distributor of this mistake,
15 * or contact the author.
16 *
17 *-------------------------------------------------------------------------
18 */
19 #ifndef PQXX_H_ROBUSTTRANSACTION
20 #define PQXX_H_ROBUSTTRANSACTION
21
22 #include "pqxx/compiler-public.hxx"
23 #include "pqxx/compiler-internal-pre.hxx"
24
25 #include "pqxx/dbtransaction"
26
27 #ifdef PQXX_QUIET_DESTRUCTORS
28 #include "pqxx/errorhandler"
29 #endif
30
31
32 /* Methods tested in eg. self-test program test001 are marked with "//[t1]"
33 */
34
35
36 namespace pqxx
37 {
38
45 class PQXX_LIBEXPORT PQXX_NOVTABLE basic_robusttransaction :
46 public dbtransaction
47 {
48 public:
50 typedef isolation_traits<read_committed> isolation_tag;
51
52 virtual ~basic_robusttransaction() =0; //[t16]
53
54 protected:
55 basic_robusttransaction(
56 connection_base &C,
57 const PGSTD::string &IsolationLevel,
58 const PGSTD::string &table_name=PGSTD::string()); //[t16]
59
60 private:
61 typedef unsigned long IDType;
62 IDType m_record_id;
63 PGSTD::string m_xid;
64 PGSTD::string m_LogTable;
65 PGSTD::string m_sequence;
66 int m_backendpid;
67
68 virtual void do_begin(); //[t18]
69 virtual void do_commit(); //[t16]
70 virtual void do_abort(); //[t18]
71
72 void PQXX_PRIVATE CreateLogTable();
73 void PQXX_PRIVATE CreateTransactionRecord();
74 PGSTD::string PQXX_PRIVATE sql_delete() const;
75 void PQXX_PRIVATE DeleteTransactionRecord() throw ();
76 bool PQXX_PRIVATE CheckTransactionRecord();
77 };
78
79
80
82
148 template<isolation_level ISOLATIONLEVEL=read_committed>
149 class robusttransaction : public basic_robusttransaction
150 {
151 public:
152 typedef isolation_traits<ISOLATIONLEVEL> isolation_tag;
153
155
159 explicit robusttransaction(connection_base &C,
160 const PGSTD::string &Name=PGSTD::string()) :
161 namedclass(fullname("robusttransaction",isolation_tag::name()), Name),
162 basic_robusttransaction(C, isolation_tag::name())
163 { Begin(); }
164
165 virtual ~robusttransaction() throw ()
166 {
167 #ifdef PQXX_QUIET_DESTRUCTORS
168 quiet_errorhandler quiet(conn());
169 #endif
170 End();
171 }
172 };
173
178 } // namespace pqxx
179
180
181 #include "pqxx/compiler-internal-post.hxx"
182
183 #endif
184