added a note explaining why routerKeyFn was added

JacobTanenbaum · JacobTanenbaum · commit 101ab9d2e1bb · 2017-03-22T10:17:36.000-04:00
diff --git a/pkg/router/controller/factory/factory.go b/pkg/router/controller/factory/factory.go
@@ -57,6 +57,9 @@ func NewDefaultRouterControllerFactory(oc osclient.RoutesNamespacer, kc kclients
 	}
 }
 
+// routerKeyFn comes from MetaNamespaceKeyFunc in vendor/k8s.io/kubernetes/pkg/client/cache/store.go.
+// It was modified and added here because there is no way to know if an ExplicitKey was passed before 
+// adding the UID to prevent an invalid state transistion if deletions and adds happen quickly.
 func routerKeyFn(obj interface{}) (string, error) {
 	if key, ok := obj.(cache.ExplicitKey); ok {
 		return string(key), nil

Original file line number	Diff line number	Diff line change
`@@ -57,6 +57,9 @@ func NewDefaultRouterControllerFactory(oc osclient.RoutesNamespacer, kc kclients`
`57`	`57`	`}`
`58`	`58`	`}`
`59`	`59`
	`60`	`+// routerKeyFn comes from MetaNamespaceKeyFunc in vendor/k8s.io/kubernetes/pkg/client/cache/store.go.`
	`61`	`+// It was modified and added here because there is no way to know if an ExplicitKey was passed before`
	`62`	`+// adding the UID to prevent an invalid state transistion if deletions and adds happen quickly.`
`60`	`63`	`func routerKeyFn(obj interface{}) (string, error) {`
`61`	`64`	`if key, ok := obj.(cache.ExplicitKey); ok {`
`62`	`65`	`return string(key), nil`