forked from skoowoo/log4go
-
Notifications
You must be signed in to change notification settings - Fork 0
/
file_writer.go
172 lines (142 loc) · 3.15 KB
/
file_writer.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
163
164
165
166
167
168
169
170
171
172
package log4go
import (
"bufio"
"bytes"
"errors"
"fmt"
"os"
"path"
"time"
)
var pathVariableTable map[byte]func(*time.Time) int
type FileWriter struct {
pathFmt string
file *os.File
fileBufWriter *bufio.Writer
actions []func(*time.Time) int
variables []interface{}
}
func NewFileWriter() *FileWriter {
return &FileWriter{}
}
func (w *FileWriter) Init() error {
return w.Rotate()
}
func (w *FileWriter) SetPathPattern(pattern string) error {
n := 0
for _, c := range pattern {
if c == '%' {
n++
}
}
if n == 0 {
w.pathFmt = pattern
return nil
}
w.actions = make([]func(*time.Time) int, 0, n)
w.variables = make([]interface{}, n, n)
tmp := []byte(pattern)
variable := 0
for _, c := range tmp {
if variable == 1 {
act, ok := pathVariableTable[c]
if !ok {
return errors.New("Invalid rotate pattern (" + pattern + ")")
}
w.actions = append(w.actions, act)
variable = 0
continue
}
if c == '%' {
variable = 1
}
}
w.pathFmt = convertPatternToFmt(tmp)
return nil
}
func (w *FileWriter) Write(r *Record) error {
if w.fileBufWriter == nil {
return errors.New("no opened file")
}
if _, err := w.fileBufWriter.WriteString(r.String()); err != nil {
return err
}
return nil
}
func (w *FileWriter) Rotate() error {
now := time.Now()
v := 0
rotate := false
for i, act := range w.actions {
v = act(&now)
if v != w.variables[i] {
w.variables[i] = v
rotate = true
}
}
if rotate == false {
return nil
}
if w.fileBufWriter != nil {
if err := w.fileBufWriter.Flush(); err != nil {
return err
}
}
if w.file != nil {
if err := w.file.Close(); err != nil {
return err
}
}
filePath := fmt.Sprintf(w.pathFmt, w.variables...)
if err := os.MkdirAll(path.Dir(filePath), 0755); err != nil {
if !os.IsExist(err) {
return err
}
}
if file, err := os.OpenFile(filePath, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0644); err != nil {
return err
} else {
w.file = file
}
if w.fileBufWriter = bufio.NewWriterSize(w.file, 8192); w.fileBufWriter == nil {
return errors.New("new fileBufWriter failed.")
}
return nil
}
func (w *FileWriter) Flush() error {
if w.fileBufWriter != nil {
return w.fileBufWriter.Flush()
}
return nil
}
func getYear(now *time.Time) int {
return now.Year()
}
func getMonth(now *time.Time) int {
return int(now.Month())
}
func getDay(now *time.Time) int {
return now.Day()
}
func getHour(now *time.Time) int {
return now.Hour()
}
func getMin(now *time.Time) int {
return now.Minute()
}
func convertPatternToFmt(pattern []byte) string {
pattern = bytes.Replace(pattern, []byte("%Y"), []byte("%d"), -1)
pattern = bytes.Replace(pattern, []byte("%M"), []byte("%02d"), -1)
pattern = bytes.Replace(pattern, []byte("%D"), []byte("%02d"), -1)
pattern = bytes.Replace(pattern, []byte("%H"), []byte("%02d"), -1)
pattern = bytes.Replace(pattern, []byte("%m"), []byte("%02d"), -1)
return string(pattern)
}
func init() {
pathVariableTable = make(map[byte]func(*time.Time) int, 5)
pathVariableTable['Y'] = getYear
pathVariableTable['M'] = getMonth
pathVariableTable['D'] = getDay
pathVariableTable['H'] = getHour
pathVariableTable['m'] = getMin
}