-
Notifications
You must be signed in to change notification settings - Fork 0
/
log.go
162 lines (140 loc) · 4.2 KB
/
log.go
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
// Package log implements a wrapper around the Go standard library's
// logging package. Clients should set the current log level; only
// messages below that level will actually be logged. For example, if
// Level is set to LevelWarning, only log messages at the Warning,
// Error, and Critical levels will be logged.
package log
import (
"fmt"
"log"
"os"
)
// The following constants represent logging levels in increasing levels of seriousness.
const (
// LevelDebug is the log level for Debug statements.
LevelDebug = iota
// LevelInfo is the log level for Info statements.
LevelInfo
// LevelWarning is the log level for Warning statements.
LevelWarning
// LevelError is the log level for Error statements.
LevelError
// LevelCritical is the log level for Critical statements.
LevelCritical
// LevelFatal is the log level for Fatal statements.
LevelFatal
)
var levelPrefix = [...]string{
LevelDebug: "DEBUG",
LevelInfo: "INFO",
LevelWarning: "WARNING",
LevelError: "ERROR",
LevelCritical: "CRITICAL",
LevelFatal: "FATAL",
}
// Level stores the current logging level.
var Level = LevelInfo
// SyslogWriter specifies the necessary methods for an alternate output
// destination passed in via SetLogger.
//
// SyslogWriter is satisfied by *syslog.Writer.
type SyslogWriter interface {
Debug(string)
Info(string)
Warning(string)
Err(string)
Crit(string)
Emerg(string)
}
// syslogWriter stores the SetLogger() parameter.
var syslogWriter SyslogWriter
// SetLogger sets the output used for output by this package.
// A *syslog.Writer is a good choice for the logger parameter.
// Call with a nil parameter to revert to default behavior.
func SetLogger(logger SyslogWriter) {
syslogWriter = logger
}
func print(l int, msg string) {
if l >= Level {
if syslogWriter != nil {
switch l {
case LevelDebug:
syslogWriter.Debug(msg)
case LevelInfo:
syslogWriter.Info(msg)
case LevelWarning:
syslogWriter.Warning(msg)
case LevelError:
syslogWriter.Err(msg)
case LevelCritical:
syslogWriter.Crit(msg)
case LevelFatal:
syslogWriter.Emerg(msg)
}
} else {
log.Printf("[%s] %s", levelPrefix[l], msg)
}
}
}
func outputf(l int, format string, v []interface{}) {
print(l, fmt.Sprintf(format, v...))
}
func output(l int, v []interface{}) {
print(l, fmt.Sprint(v...))
}
// Fatalf logs a formatted message at the "fatal" level and then exits. The
// arguments are handled in the same manner as fmt.Printf.
func Fatalf(format string, v ...interface{}) {
outputf(LevelFatal, format, v)
os.Exit(1)
}
// Fatal logs its arguments at the "fatal" level and then exits.
func Fatal(v ...interface{}) {
output(LevelFatal, v)
os.Exit(1)
}
// Criticalf logs a formatted message at the "critical" level. The
// arguments are handled in the same manner as fmt.Printf.
func Criticalf(format string, v ...interface{}) {
outputf(LevelCritical, format, v)
}
// Critical logs its arguments at the "critical" level.
func Critical(v ...interface{}) {
output(LevelCritical, v)
}
// Errorf logs a formatted message at the "error" level. The arguments
// are handled in the same manner as fmt.Printf.
func Errorf(format string, v ...interface{}) {
outputf(LevelError, format, v)
}
// Error logs its arguments at the "error" level.
func Error(v ...interface{}) {
output(LevelError, v)
}
// Warningf logs a formatted message at the "warning" level. The
// arguments are handled in the same manner as fmt.Printf.
func Warningf(format string, v ...interface{}) {
outputf(LevelWarning, format, v)
}
// Warning logs its arguments at the "warning" level.
func Warning(v ...interface{}) {
output(LevelWarning, v)
}
// Infof logs a formatted message at the "info" level. The arguments
// are handled in the same manner as fmt.Printf.
func Infof(format string, v ...interface{}) {
outputf(LevelInfo, format, v)
}
// Info logs its arguments at the "info" level.
func Info(v ...interface{}) {
output(LevelInfo, v)
}
// Debugf logs a formatted message at the "debug" level. The arguments
// are handled in the same manner as fmt.Printf.
func Debugf(format string, v ...interface{}) {
outputf(LevelDebug, format, v)
}
// Debug logs its arguments at the "debug" level.
func Debug(v ...interface{}) {
output(LevelDebug, v)
}