Ilia Denisov
64 lines
1.4 KiB
Go
64 lines
1.4 KiB
Go
// Package logging configures the backend structured logger.
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package logging
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import (
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"strings"
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"galaxy/backend/internal/config"
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"go.uber.org/zap"
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"go.uber.org/zap/zapcore"
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)
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// New constructs the process-wide JSON logger from cfg.
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func New(cfg config.LoggingConfig) (*zap.Logger, error) {
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level := zap.NewAtomicLevel()
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if err := level.UnmarshalText([]byte(strings.TrimSpace(cfg.Level))); err != nil {
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return nil, err
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}
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zapCfg := zap.NewProductionConfig()
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zapCfg.Level = level
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zapCfg.Sampling = nil
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zapCfg.Encoding = "json"
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zapCfg.EncoderConfig.TimeKey = "timestamp"
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zapCfg.EncoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder
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zapCfg.OutputPaths = []string{"stdout"}
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zapCfg.ErrorOutputPaths = []string{"stderr"}
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return zapCfg.Build()
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}
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// Sync flushes logger and ignores the benign stdout or stderr sync errors
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// commonly returned by containerized or redirected process outputs.
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func Sync(logger *zap.Logger) error {
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if logger == nil {
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return nil
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}
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err := logger.Sync()
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if err == nil || isIgnorableSyncError(err) {
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return nil
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}
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return err
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}
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func isIgnorableSyncError(err error) bool {
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if err == nil {
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return false
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}
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message := strings.ToLower(err.Error())
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switch {
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case strings.Contains(message, "invalid argument"):
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return true
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case strings.Contains(message, "bad file descriptor"):
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return true
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case strings.Contains(message, "inappropriate ioctl for device"):
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return true
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default:
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return false
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}
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}
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