Abstract Factory as interface

Use legacy factory as DefaultFactory

context_logger.go

@@ -23,6 +23,23 @@ func baggageString(b map[string]interface{}) string {
 	return strings.Join(kvPairs, ": ")
 }
 
+// Factory provides context aware loggers.
+type Factory struct {
+	baseLogger Logger
+}
+
+// NewFactory instantiates a factory with the default logger.
+func NewFactory() Factory {
+	return Factory{
+		baseLogger: DefaultLogger,
+	}
+}
+
+// For provides a logger which is aware of the passed context and will prepend the context baggage values.
+func (f Factory) For(ctx context.Context) Logger {
+	return newBaggageLogger(ctx, f.baseLogger)
+}
+
 func newBaggageLogger(ctx context.Context, base Logger) baggageLogger {
 	return baggageLogger{
 		Logger: base,

factory.go

@@ -4,25 +4,14 @@ import (
 	"context"
 )
 
-// Factory provides context aware loggers.
-type Factory struct {
-	baseLogger Logger
-}
-
-// NewFactory instantiates a factory with the default logger.
-func NewFactory() Factory {
-	return Factory{
-		baseLogger: DefaultLogger,
-	}
-}
+var DefaultFactory Factory = NewFactory()
 
-// For provides a logger which is aware of the passed context and will prepend the context baggage values.
-func (f Factory) For(ctx context.Context) Logger {
-	return newBaggageLogger(ctx, f.baseLogger)
+type LoggerFactory interface {
+	For(ctx context.Context) Logger
 }
 
 // For provides a logger which is aware of the passed context and will prepend
 // the context baggage values, using DefaultLogger as base logger.
 func For(ctx context.Context) Logger {
-	return newBaggageLogger(ctx, DefaultLogger)
+	return DefaultFactory.For(ctx)
 }