made it so that the Route() methods, of the various routers, will return an error if the receiver is nil. (except for the discard router.)

copying_router.go

@@ -27,6 +27,10 @@ type CopyingRouter struct {
 
 
 func (router *CopyingRouter) Route(message string, context map[string]interface{}) error {
+	if nil == router {
+		return errNilReceiver
+	}
+
 	copy := struct{Message string ; Context map[string]interface{}}{
 		Message: message,
 		Context: context,

errors.go

@@ -0,0 +1,11 @@
+package flog
+
+
+import (
+	"errors"
+)
+
+
+var (
+	errNilReceiver = errors.New("Nil Receiver")
+)

fanout_router.go

@@ -24,6 +24,10 @@ type FanoutRouter struct {
 
 
 func (router *FanoutRouter) Route(message string, context map[string]interface{}) error {
+	if nil == router {
+		return errNilReceiver
+	}
+
 	errors := []error{}
 
 	for _, subrouter := range router.subrouters {

filtering_router.go

@@ -74,6 +74,10 @@ type FilteringRouter struct {
 
 
 func (router *FilteringRouter) Route(message string, context map[string]interface{}) error {
+	if nil == router {
+		return errNilReceiver
+	}
+
 	if router.filterFn(message, context) {
 		return router.subrouter.Route(message, context)
 	}

mapping_router.go

@@ -24,5 +24,9 @@ type MappingRouter struct {
 
 
 func (router *MappingRouter) Route(message string, context map[string]interface{}) error {
+	if nil == router {
+		return errNilReceiver
+	}
+
 	return router.subrouter.Route(router.fn(message, context))
 }

non_blocking_router.go

@@ -22,6 +22,10 @@ type NonBlockingRouter struct {
 
 
 func (router *NonBlockingRouter) Route(message string, context map[string]interface{}) error {
+	if nil == router {
+		return errNilReceiver
+	}
+
 	go func() {
 		router.subrouter.Route(message, context)
 	}()

pretty_writing_router.go

@@ -34,6 +34,9 @@ type PrettyWritingRouter struct {
 
 
 func (router *PrettyWritingRouter) Route(message string, context map[string]interface{}) error {
+	if nil == router {
+		return errNilReceiver
+	}
 
 	const STYLE_FATAL     = "\x1b[40;33;1m" // BG BLACK,  FG YELLOW, BOLD
 	const STYLE_PANIC     = "\x1b[40;31;1m" // BG BLACK,  FG RED,    BOLD