frostfs-http-gw/logger/zap.go

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package logger
import (
"strings"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
)
type (
Option func(o *options)
options struct {
Options []zap.Option
SamplingInitial int
SamplingThereafter int
Format string
Level string
TraceLevel string
NoCaller bool
NoDisclaimer bool
AppName string
AppVersion string
}
)
const (
formatJSON = "json"
formatConsole = "console"
defaultSamplingInitial = 100
defaultSamplingThereafter = 100
lvlInfo = "info"
lvlWarn = "warn"
lvlDebug = "debug"
lvlError = "error"
lvlFatal = "fatal"
lvlPanic = "panic"
)
func safeLevel(lvl string) zap.AtomicLevel {
switch strings.ToLower(lvl) {
case lvlDebug:
return zap.NewAtomicLevelAt(zap.DebugLevel)
case lvlWarn:
return zap.NewAtomicLevelAt(zap.WarnLevel)
case lvlError:
return zap.NewAtomicLevelAt(zap.ErrorLevel)
case lvlFatal:
return zap.NewAtomicLevelAt(zap.FatalLevel)
case lvlPanic:
return zap.NewAtomicLevelAt(zap.PanicLevel)
default:
return zap.NewAtomicLevelAt(zap.InfoLevel)
}
}
func defaults() *options {
return &options{
SamplingInitial: defaultSamplingInitial,
SamplingThereafter: defaultSamplingThereafter,
Format: formatConsole,
Level: lvlDebug,
TraceLevel: lvlInfo,
NoCaller: false,
NoDisclaimer: false,
AppName: "",
AppVersion: "",
}
}
func New(opts ...Option) (*zap.Logger, error) {
o := defaults()
c := zap.NewProductionConfig()
c.OutputPaths = []string{"stdout"}
c.ErrorOutputPaths = []string{"stdout"}
for _, opt := range opts {
opt(o)
}
// set sampling
c.Sampling = &zap.SamplingConfig{
Initial: o.SamplingInitial,
Thereafter: o.SamplingThereafter,
}
// logger level
c.Level = safeLevel(o.Level)
traceLvl := safeLevel(o.TraceLevel)
// logger format
switch f := o.Format; strings.ToLower(f) {
case formatConsole:
c.Encoding = formatConsole
default:
c.Encoding = formatJSON
}
// logger time
c.EncoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder
if o.NoCaller {
c.EncoderConfig.EncodeCaller = nil
}
// enable trace only for current log-level
o.Options = append(o.Options, zap.AddStacktrace(traceLvl))
l, err := c.Build(o.Options...)
if err != nil {
return nil, err
}
if o.NoDisclaimer {
return l, nil
}
return l.With(
zap.String("app_name", o.AppName),
zap.String("app_version", o.AppVersion)), nil
}