Record cluster scoped handlers

Problem: Cluster scoped handlers were not being cleaned up without
manually writing garbage collection functions.

Solution: All cluster scoped handlers will be recorded in a global map
in a generic format so that they can be removed by a generic function.

generator/controller_template.go

@@ -8,6 +8,7 @@ import (
 	{{.importPackage}}
 	"github.com/rancher/norman/objectclient"
 	"github.com/rancher/norman/controller"
+	"github.com/rancher/norman/resource"
 	"k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/labels"
@@ -34,8 +35,18 @@ var (
 {{- end }}
 		Kind:         {{.schema.CodeName}}GroupVersionKind.Kind,
 	}
+
+	{{.schema.CodeName}}GroupVersionResource = schema.GroupVersionResource{
+		Group:     GroupName,
+		Version:   Version,
+		Resource:  "{{.schema.PluralName | toLower}}",
+	}
 )
 
+func init() {
+	resource.Put({{.schema.CodeName}}GroupVersionResource)
+}
+
 func New{{.schema.CodeName}}(namespace, name string, obj {{.prefix}}{{.schema.CodeName}}) *{{.prefix}}{{.schema.CodeName}} {
 	obj.APIVersion, obj.Kind = {{.schema.CodeName}}GroupVersionKind.ToAPIVersionAndKind()
 	obj.Name = name

resource/resource.go

@@ -0,0 +1,38 @@
+package resource
+
+import (
+	"sync"
+
+	"k8s.io/apimachinery/pkg/runtime/schema"
+)
+
+//rancherTypes is a set of all types generated by rancher
+var (
+	rancherTypes = struct {
+		sync.RWMutex
+		m map[schema.GroupVersionResource]bool
+	}{m: make(map[schema.GroupVersionResource]bool)}
+)
+
+//Get returns a copy of the set of rancherTypes
+func Get() map[schema.GroupVersionResource]bool {
+	rancherTypes.RLock()
+	defer rancherTypes.RUnlock()
+	targetMap := make(map[schema.GroupVersionResource]bool, len(rancherTypes.m))
+	for key, value := range rancherTypes.m {
+		targetMap[key] = value
+	}
+	return targetMap
+}
+
+//Put adds an object to the set and panic on collision
+func Put(key schema.GroupVersionResource) {
+	rancherTypes.Lock()
+	defer rancherTypes.Unlock()
+	_, exists := rancherTypes.m[key]
+	if exists {
+		//only used in an init function
+		panic("key exists in rancherTypes")
+	}
+	rancherTypes.m[key] = true
+}