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
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
// -*- c++ -*-
//------------------------------------------------------------------------------
// RemoteLogger.cpp
//------------------------------------------------------------------------------
// $Id: RemoteLogger.cpp,v 1.3 2006/07/26 00:27:32 vlg Exp $
//------------------------------------------------------------------------------
// Copyright (c) 2003 by Vladislav Grinchenko
//
// 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; either version
// 2 of the License, or (at your option) any later version.
//------------------------------------------------------------------------------
// Date:
//------------------------------------------------------------------------------
#include <iostream>
#include <sstream>
#include "Reactor.h"
#include "Socket.h"
#include "RemoteLogger.h"
using namespace ASSA;
/*******************************************************************************
Class member functions
*******************************************************************************/
RemoteLogger::
RemoteLogger () :
m_state (closed),
m_recursive_call (false)
{
// no-op
}
int
RemoteLogger::
open ()
{
return 0;
}
int
RemoteLogger::
log_open (const char* appname_,
const char* logfname_,
u_long groups_,
u_long maxsize_,
Reactor* reactor_)
{
if (m_recursive_call) {
return 0;
}
m_recursive_call = true;
if (m_state == opened) {
return 0;
}
m_logfname = logfname_;
m_groups = groups_;
m_reactor = reactor_;
m_reactor->registerIOHandler (this, get_stream ().getHandler(),
ASSA::READ_EVENT);
/** Put stream in a blocking mode. Otherwise, fast clients can
override log server.
*/
get_stream ().turnOptionOff (Socket::nonblocking);
/** Send SIGN_ON message to the log server.
*/
size_t len = sizeof (maxsize_) +
Socket::xdr_length (appname_) +
Socket::xdr_length (logfname_);
/** Header + Body
*/
get_stream () << 1234567890 << SIGN_ON << len
<< maxsize_ << appname_ << logfname_ << ASSA::flush;
m_state = opened;
m_recursive_call = false;
return 0;
}
int
RemoteLogger::
log_close (void)
{
/** Send SIGN_OFF message to the log server and stop data processing.
* We are managed by Logger class.
*/
if (m_state == opened) {
m_recursive_call = true;
get_stream () << 1234567890 << SIGN_OFF << 0 << ASSA::flush;
m_reactor->removeHandler (this, READ_EVENT);
m_recursive_call = false;
}
return 0;
}
int
RemoteLogger::
handle_close (int fd_)
{
m_state = closed;
m_logfname.empty ();
return 0;
}
void
RemoteLogger::
log_resync (void)
{
if (m_state == opened) {
m_recursive_call = true;
get_stream () << ASSA::flush;
m_recursive_call = false;
}
}
int
RemoteLogger::
log_msg (Group groups_,
size_t indent_level_,
const string& func_name_,
size_t expected_sz_,
const char* fmt_,
va_list msg_list_)
{
if (m_recursive_call) {
return 0;
}
if (m_state == closed) {
return -1;
}
if (!group_enabled (groups_)) {
return 0;
}
std::ostringstream os;
add_timestamp (os);
indent_func_name (os, func_name_, indent_level_, FUNC_MSG);
bool release = false;
char* msgbuf_ptr = format_msg (expected_sz_, fmt_, msg_list_, release);
if (msgbuf_ptr == NULL) {
return -1; // failed to format
}
os << msgbuf_ptr;
if (release) {
delete [] msgbuf_ptr;
}
/** Header + body (preamble;LOG_MSG;length;msg)
*/
if (get_stream ()) {
m_recursive_call = true;
Assure_exit (os.str ().length () != 0);
get_stream () << 1234567890 << LOG_MSG << Socket::xdr_length (os.str ())
<< os.str () << ASSA::flush;
m_recursive_call = false;
}
else {
m_state = closed;
}
return 0;
}
int
RemoteLogger::
log_func (Group groups_,
size_t indent_level_,
const string& func_name_,
marker_t type_)
{
if (m_recursive_call) {
return 0;
}
if (m_state == closed) {
return -1;
}
if (! group_enabled (groups_)) {
return 0;
}
std::ostringstream os;
add_timestamp (os);
indent_func_name (os, func_name_, indent_level_, type_);
os << ((type_ == FUNC_ENTRY) ? "---v---\n" : "---^---\n");
/** Header + body (preamble;LOG_MSG;length;msg)
*/
if (get_stream ().good ()) {
m_recursive_call = true;
get_stream () << 1234567890 << LOG_MSG << Socket::xdr_length (os.str ())
<< os.str () << ASSA::flush;
m_recursive_call = false;
}
else {
m_state = closed;
}
return 0;
}
|
