zevst /
alog
| Total Lines | 67 |
| Duplicated Lines | 0 % |
| Changes | 0 | ||
| 1 | //////////////////////////////////////////////////////////////////////////////// |
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| 7 | package alog |
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| 8 | |||
| 9 | import ( |
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| 10 | "errors" |
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| 11 | "fmt" |
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| 12 | "io" |
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| 13 | "log" |
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| 14 | ) |
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| 15 | |||
| 16 | // Logger types |
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| 17 | const ( |
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| 18 | Info uint = iota |
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| 19 | Wrn |
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| 20 | Err |
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| 21 | ) |
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| 22 | |||
| 23 | // Logger logger structure which includes a channel and a slice strategies |
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| 24 | type Logger struct { |
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| 25 | io.Writer |
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| 26 | Channel chan string |
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| 27 | Strategies []io.Writer |
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| 28 | } |
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| 29 | |||
| 30 | // Map mapping for type:logger |
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| 31 | type Map map[uint]*Logger |
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| 32 | |||
| 33 | var loggerName = map[uint]string{ |
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| 34 | Info: "Info", |
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| 35 | Wrn: "Warning", |
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| 36 | Err: "Error", |
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| 37 | } |
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| 38 | |||
| 39 | // Name returns a name for the logger. |
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| 40 | // It returns the empty string if the code is unknown. |
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| 41 | func Name(code uint) string { |
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| 42 | return loggerName[code] |
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| 43 | } |
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| 44 | |||
| 45 | // Writer interface for informational messages |
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| 46 | func (l *Logger) Write(p []byte) (n int, err error) { |
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| 47 | if l == nil || isClosedCh(l.Channel) { |
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| 48 | return 0, errors.New("the channel was closed for recording") |
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| 49 | } |
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| 50 | l.Channel <- string(p) |
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| 51 | return len(p), nil |
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| 52 | } |
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| 53 | |||
| 54 | func isClosedCh(ch <-chan string) bool { |
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| 55 | select { |
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| 56 | case <-ch: |
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| 57 | return true |
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| 58 | default: |
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| 59 | return false |
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| 60 | } |
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| 61 | } |
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| 62 | |||
| 63 | //Reader for messages |
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| 64 | func (l *Logger) Reader() { |
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| 65 | for msg := range l.Channel { |
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| 66 | l.writeMessage(msg) |
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| 67 | } |
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| 68 | } |
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| 69 | |||
| 70 | func (l *Logger) writeMessage(msg string) { |
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| 71 | for _, s := range l.Strategies { |
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| 72 | if n, err := s.Write([]byte(msg)); err != nil { |
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| 73 | log.Println(fmt.Sprintf("%d characters have been written. %s", n, err.Error())) |
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| 74 | } |
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| 77 |
