Move periodic backoff gc to federation utils

federation/pkg/federation-controller/deployment/deploymentcontroller.go

@@ -228,17 +228,7 @@ func (fdc *DeploymentController) Run(workers int, stopCh <-chan struct{}) {
 		go wait.Until(fdc.worker, time.Second, stopCh)
 	}
 
-	go func() {
+	fedutil.StartBackoffGC(fdc.deploymentBackoff, stopCh)
-		for {
-			// Perform backof registry cleanup from time to time.
-			select {
-			case <-time.After(time.Minute):
-				fdc.deploymentBackoff.GC()
-			case <-stopCh:
-				return
-			}
-		}
-	}()
 
 	<-stopCh
 	glog.Infof("Shutting down DeploymentController")

federation/pkg/federation-controller/ingress/ingress_controller.go

@@ -317,17 +317,9 @@ func (ic *IngressController) Run(stopChan <-chan struct{}) {
 		}
 		ic.reconcileConfigMapForCluster(clusterName)
 	})
-	go func() {
+
-		select {
+	util.StartBackoffGC(ic.ingressBackoff, stopChan)
-		case <-time.After(time.Minute):
+	util.StartBackoffGC(ic.configMapBackoff, stopChan)
-			glog.V(4).Infof("Ingress controller is garbage collecting")
-			ic.ingressBackoff.GC()
-			ic.configMapBackoff.GC()
-			glog.V(4).Infof("Ingress controller garbage collection complete")
-		case <-stopChan:
-			return
-		}
-	}()
 }
 
 func (ic *IngressController) deliverIngressObj(obj interface{}, delay time.Duration, failed bool) {

federation/pkg/federation-controller/namespace/namespace_controller.go

@@ -180,14 +180,7 @@ func (nc *NamespaceController) Run(stopChan <-chan struct{}) {
 	nc.clusterDeliverer.StartWithHandler(func(_ *util.DelayingDelivererItem) {
 		nc.reconcileNamespacesOnClusterChange()
 	})
-	go func() {
+	util.StartBackoffGC(nc.namespaceBackoff, stopChan)
-		select {
-		case <-time.After(time.Minute):
-			nc.namespaceBackoff.GC()
-		case <-stopChan:
-			return
-		}
-	}()
 }
 
 func (nc *NamespaceController) deliverNamespaceObj(obj interface{}, delay time.Duration, failed bool) {

federation/pkg/federation-controller/replicaset/replicasetcontroller.go

@@ -228,14 +228,7 @@ func (frsc *ReplicaSetController) Run(workers int, stopCh <-chan struct{}) {
 		go wait.Until(frsc.worker, time.Second, stopCh)
 	}
 
-	go func() {
+	fedutil.StartBackoffGC(frsc.replicaSetBackoff, stopCh)
-		select {
-		case <-time.After(time.Minute):
-			frsc.replicaSetBackoff.GC()
-		case <-stopCh:
-			return
-		}
-	}()
 
 	<-stopCh
 	glog.Infof("Shutting down ReplicaSetController")

federation/pkg/federation-controller/secret/secret_controller.go

@@ -179,14 +179,7 @@ func (secretcontroller *SecretController) Run(stopChan <-chan struct{}) {
 	secretcontroller.clusterDeliverer.StartWithHandler(func(_ *util.DelayingDelivererItem) {
 		secretcontroller.reconcileSecretsOnClusterChange()
 	})
-	go func() {
+	util.StartBackoffGC(secretcontroller.secretBackoff, stopChan)
-		select {
-		case <-time.After(time.Minute):
-			secretcontroller.secretBackoff.GC()
-		case <-stopChan:
-			return
-		}
-	}()
 }
 
 func getSecretKey(namespace, name string) string {

federation/pkg/federation-controller/util/backoff.go

@@ -0,0 +1,36 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package util
+
+import (
+	"time"
+
+	"k8s.io/kubernetes/pkg/util/flowcontrol"
+)
+
+func StartBackoffGC(backoff *flowcontrol.Backoff, stopCh <-chan struct{}) {
+	go func() {
+		for {
+			select {
+			case <-time.After(time.Minute):
+				backoff.GC()
+			case <-stopCh:
+				return
+			}
+		}
+	}()
+}