libpqxx 4.0.1

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notification.hxx
1 /*-------------------------------------------------------------------------
2 *
3 * FILE
4 * pqxx/notification.hxx
5 *
6 * DESCRIPTION
7 * definition of the pqxx::notification_receiver functor interface.
8 * pqxx::notification_receiver handles incoming notifications.
9 * DO NOT INCLUDE THIS FILE DIRECTLY; include pqxx/notification instead.
10 *
11 * Copyright (c) 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_NOTIFICATION
20 #define PQXX_H_NOTIFICATION
21
22 #include "pqxx/compiler-public.hxx"
23 #include "pqxx/compiler-internal-pre.hxx"
24
25 namespace pqxx
26 {
27 class connection_base;
28
29
31
59 class PQXX_LIBEXPORT PQXX_NOVTABLE notification_receiver :
60 public PGSTD::binary_function<const PGSTD::string &, int, void>
61 {
62 public:
64
68 notification_receiver(connection_base &c, const PGSTD::string &channel);
69 virtual ~notification_receiver();
70
72 const PGSTD::string &channel() const { return m_channel; }
73
75
82 virtual void operator()(const PGSTD::string &payload, int backend_pid) =0;
83
84 protected:
85 connection_base &conn() const throw () { return m_conn; }
86
87 private:
88 // Not allowed.
89 notification_receiver(const notification_receiver &);
90 // Not allowed.
91 notification_receiver &operator=(const notification_receiver &);
92
93 connection_base &m_conn;
94 PGSTD::string m_channel;
95 };
96 }
97
98 #include "pqxx/compiler-internal-pre.hxx"
99 #include "pqxx/compiler-internal-post.hxx"
100 #endif