1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 Sun Microsystems, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <config.h>
#include <drizzled/error.h>
#include <drizzled/gettext.h>
#include <drizzled/plugin/error_message.h>
#include <cstdio>
#include <algorithm>
#include <vector>
namespace drizzled
{
std::vector<plugin::ErrorMessage *> all_errmsg_handler;
bool plugin::ErrorMessage::addPlugin(plugin::ErrorMessage *handler)
{
all_errmsg_handler.push_back(handler);
return false;
}
void plugin::ErrorMessage::removePlugin(plugin::ErrorMessage *)
{
all_errmsg_handler.clear();
}
class Print : public std::unary_function<plugin::ErrorMessage *, bool>
{
error::level_t priority;
const char *format;
va_list ap;
public:
Print(error::level_t priority_arg,
const char *format_arg, va_list ap_arg) :
std::unary_function<plugin::ErrorMessage *, bool>(),
priority(priority_arg), format(format_arg)
{
va_copy(ap, ap_arg);
}
~Print() { va_end(ap); }
inline result_type operator()(argument_type handler)
{
va_list handler_ap;
va_copy(handler_ap, ap);
if (handler->errmsg(priority, format, handler_ap))
{
/* we're doing the errmsg plugin api,
so we can't trust the errmsg api to emit our error messages
so we will emit error messages to stderr */
/* TRANSLATORS: The leading word "errmsg" is the name
of the plugin api, and so should not be translated. */
fprintf(stderr,
_("errmsg plugin '%s' errmsg() failed"),
handler->getName().c_str());
va_end(handler_ap);
return true;
}
va_end(handler_ap);
return false;
}
};
bool plugin::ErrorMessage::vprintf(error::level_t priority, char const *format, va_list ap)
{
if (not (priority >= error::verbosity()))
return false;
/*
Check to see if any errmsg plugin has been loaded
if not, just fall back to emitting the message to stderr.
*/
if (not all_errmsg_handler.size())
{
/* if it turns out that the vfprintf doesnt do one single write
(single writes are atomic), then this needs to be rewritten to
vsprintf into a char buffer, and then write() that char buffer
to stderr */
vfprintf(stderr, format, ap);
fputc('\n', stderr);
return false;
}
/* Use find_if instead of foreach so that we can collect return codes */
std::vector<plugin::ErrorMessage *>::iterator iter=
std::find_if(all_errmsg_handler.begin(), all_errmsg_handler.end(),
Print(priority, format, ap));
/* If iter is == end() here, that means that all of the plugins returned
* false, which in this case means they all succeeded. Since we want to
* return false on success, we return the value of the two being !=
*/
return iter != all_errmsg_handler.end();
}
} /* namespace drizzled */
|