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logger.go
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logger.go
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package logger
import (
"os"
"sync"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
)
var (
//Log is shared acorss the application using zap
Log *zap.Logger
onceInit sync.Once
)
//Init initialize
func Init(lvl int) error {
var err error
onceInit.Do(func() {
// First, define our level-handling logic.
defaultLvl := zapcore.Level(lvl)
//Prioritize more higher level log
high := zap.LevelEnablerFunc(func(lvl zapcore.Level) bool {
return lvl >= zapcore.ErrorLevel
})
low := zap.LevelEnablerFunc(func(lvl zapcore.Level) bool {
return lvl >= defaultLvl && lvl < zapcore.ErrorLevel
})
infos := zapcore.Lock(os.Stdout)
errors := zapcore.Lock(os.Stderr)
//zap log output configuration
ecfg := zap.NewProductionEncoderConfig()
ecfg.EncodeTime = zapcore.ISO8601TimeEncoder
encoder := zapcore.NewJSONEncoder(ecfg)
core := zapcore.NewTee(
zapcore.NewCore(encoder, errors, high),
zapcore.NewCore(encoder, infos, low),
)
//construct log
Log = zap.New(core)
zap.RedirectStdLog(Log)
})
return err
}