/
logger.go
54 lines (41 loc) · 1.37 KB
/
logger.go
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package logging
import (
"context"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
)
// contextKey is a private string type to prevent collisions in the context map.
type contextKey string
// loggerKey points to the value in the context where the logging is stored.
const loggerKey = contextKey("logging")
var fallbackLogger *zap.SugaredLogger
func NewLogger() *zap.SugaredLogger {
loggerCfg := zap.NewDevelopmentConfig()
loggerCfg.EncoderConfig.MessageKey = "message"
loggerCfg.EncoderConfig.TimeKey = "timestamp"
loggerCfg.EncoderConfig.EncodeDuration = zapcore.NanosDurationEncoder
loggerCfg.EncoderConfig.StacktraceKey = "error.stack"
loggerCfg.EncoderConfig.FunctionKey = "logging.method_name"
loggerCfg.DisableStacktrace = true
loggerCfg.DisableCaller = true
loggerCfg.EncoderConfig.EncodeLevel = zapcore.CapitalColorLevelEncoder
logger, err := loggerCfg.Build()
if err != nil {
logger = zap.NewNop()
}
return logger.Sugar()
}
func WithLogger(ctx context.Context, logger *zap.SugaredLogger) context.Context {
return context.WithValue(ctx, loggerKey, logger)
}
func FromContext(ctx context.Context) *zap.SugaredLogger {
if logger, ok := ctx.Value(loggerKey).(*zap.SugaredLogger); ok {
return logger
}
if fallbackLogger == nil {
loggerCfg := zap.NewProductionConfig()
logger, _ := loggerCfg.Build()
fallbackLogger = logger.Sugar()
}
return fallbackLogger
}