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logging.go
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logging.go
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package logging
import (
"io"
"log/slog"
"os"
"sync"
"time"
"github.com/go-logr/logr"
"github.com/go-logr/zerologr"
"github.com/rs/zerolog"
"gopkg.in/natefinch/lumberjack.v2"
)
var setupOnce sync.Once
func setup() {
setupOnce.Do(func() {
zerologr.NameSeparator = "/"
zerologr.NameFieldName = "N"
zerologr.VerbosityFieldName = "V"
zerologr.SetMaxV(LogVerbosity)
})
}
var (
LogRotateMBytes uint16 = 16
LogRotateFiles uint16 = 64
LogVerbosity = 2
LogConsoleThreshold = int8(zerolog.TraceLevel)
DefaultLogger = NewLogger("")
)
func NewLogger(path string) *slog.Logger {
logger := NewLogr(path)
sLogger := slog.New(logr.ToSlogHandler(logger))
return sLogger
}
func NewLogr(path string) logr.Logger {
setup()
console := NewThresholdConsole()
var logger *zerolog.Logger
if len(path) > 0 {
verbose := NewLumberjack(LogRotateMBytes, LogRotateFiles, path)
logger = NewZerolog(verbose, console)
} else {
logger = NewZerolog(console)
}
return zerologr.New(logger)
}
func NewLumberjack(fileMBytes uint16, fileCount uint16, path string) *lumberjack.Logger {
logger := &lumberjack.Logger{
Filename: path,
MaxSize: int(fileMBytes),
MaxBackups: int(fileCount),
LocalTime: false,
Compress: true,
}
return logger
}
func NewZerolog(writers ...io.Writer) *zerolog.Logger {
multi := zerolog.MultiLevelWriter(writers...)
logger := zerolog.New(multi).With().Timestamp().Caller().Logger()
return &logger
}
type ThresholdWriter struct {
threshold zerolog.Level
writer zerolog.LevelWriter
}
func (t *ThresholdWriter) Write(bytes []byte) (n int, err error) {
return t.WriteLevel(zerolog.NoLevel, bytes)
}
func (t *ThresholdWriter) WriteLevel(level zerolog.Level, bytes []byte) (n int, err error) {
if level >= t.threshold {
return t.writer.WriteLevel(level, bytes)
}
return len(bytes), nil
}
func NewThresholdConsole() *ThresholdWriter {
console := zerolog.ConsoleWriter{
Out: os.Stderr,
TimeFormat: time.RFC3339,
}
return &ThresholdWriter{
writer: zerolog.MultiLevelWriter(console),
threshold: zerolog.Level(LogConsoleThreshold),
}
}