aboutsummaryrefslogtreecommitdiffstats
path: root/logger/logsystem.go
blob: 8458b938f331b9f65a447930e0d9403e5a268543 (plain) (blame)
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
package logger

import (
    "io"
    "log"
    "sync/atomic"
)

// LogSystem is implemented by log output devices.
// All methods can be called concurrently from multiple goroutines.
type LogSystem interface {
    GetLogLevel() LogLevel
    SetLogLevel(i LogLevel)
    LogPrint(LogLevel, string)
}

// NewStdLogSystem creates a LogSystem that prints to the given writer.
// The flag values are defined package log.
func NewStdLogSystem(writer io.Writer, flags int, level LogLevel) LogSystem {
    logger := log.New(writer, "", flags)
    return &stdLogSystem{logger, uint32(level)}
}

type stdLogSystem struct {
    logger *log.Logger
    level  uint32
}

func (t *stdLogSystem) LogPrint(level LogLevel, msg string) {
    t.logger.Print(msg)
}

func (t *stdLogSystem) SetLogLevel(i LogLevel) {
    atomic.StoreUint32(&t.level, uint32(i))
}

func (t *stdLogSystem) GetLogLevel() LogLevel {
    return LogLevel(atomic.LoadUint32(&t.level))
}

// NewRawLogSystem creates a LogSystem that prints to the given writer without
// adding extra information. Suitable for preformatted output
func NewRawLogSystem(writer io.Writer, flags int, level LogLevel) LogSystem {
    logger := log.New(writer, "", 0)
    return &rawLogSystem{logger, uint32(level)}
}

type rawLogSystem struct {
    logger *log.Logger
    level  uint32
}

func (t *rawLogSystem) LogPrint(level LogLevel, msg string) {
    t.logger.Print(msg)
}

func (t *rawLogSystem) SetLogLevel(i LogLevel) {
    atomic.StoreUint32(&t.level, uint32(i))
}

func (t *rawLogSystem) GetLogLevel() LogLevel {
    return LogLevel(atomic.LoadUint32(&t.level))
}