1/*
2Copyright (c) 2007, Antony T Curtis
3All rights reserved.
4
5Redistribution and use in source and binary forms, with or without
6modification, are permitted provided that the following conditions are
7met:
8
9 * Redistributions of source code must retain the above copyright
10notice, this list of conditions and the following disclaimer.
11
12 * Neither the name of FederatedX nor the names of its
13contributors may be used to endorse or promote products derived from
14this software without specific prior written permission.
15
16THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27*/
28
29
30/*#define MYSQL_SERVER 1*/
31#include <my_global.h>
32#include "sql_priv.h"
33
34#include "ha_federatedx.h"
35
36#include "m_string.h"
37
38#ifdef USE_PRAGMA_IMPLEMENTATION
39#pragma implementation // gcc: Class implementation
40#endif
41
42typedef federatedx_io *(*instantiate_io_type)(MEM_ROOT *server_root,
43 FEDERATEDX_SERVER *server);
44struct io_schemes_st
45{
46 const char *scheme;
47 instantiate_io_type instantiate;
48};
49
50
51static const io_schemes_st federated_io_schemes[] =
52{
53 { "mysql", &instantiate_io_mysql },
54 { "null", instantiate_io_null } /* must be last element */
55};
56
57federatedx_io::federatedx_io(FEDERATEDX_SERVER *aserver)
58 : server(aserver), owner_ptr(0), txn_next(0), idle_next(0),
59 active(FALSE), busy(FALSE), readonly(TRUE)
60{
61 DBUG_ENTER("federatedx_io::federatedx_io");
62 DBUG_ASSERT(server);
63
64 mysql_mutex_assert_owner(&server->mutex);
65 server->io_count++;
66
67 DBUG_VOID_RETURN;
68}
69
70
71federatedx_io::~federatedx_io()
72{
73 DBUG_ENTER("federatedx_io::~federatedx_io");
74
75 server->io_count--;
76
77 DBUG_VOID_RETURN;
78}
79
80
81bool federatedx_io::handles_scheme(const char *scheme)
82{
83 const io_schemes_st *ptr = federated_io_schemes;
84 const io_schemes_st *end = ptr + array_elements(federated_io_schemes);
85 while (ptr != end && strcasecmp(scheme, ptr->scheme))
86 ++ptr;
87 return ptr != end;
88}
89
90
91federatedx_io *federatedx_io::construct(MEM_ROOT *server_root,
92 FEDERATEDX_SERVER *server)
93{
94 const io_schemes_st *ptr = federated_io_schemes;
95 const io_schemes_st *end = ptr + (array_elements(federated_io_schemes) - 1);
96 while (ptr != end && strcasecmp(server->scheme, ptr->scheme))
97 ++ptr;
98 return ptr->instantiate(server_root, server);
99}
100
101
102