Remove no-longer used code in proxy/config

cmd/kube-proxy/app/server.go

@@ -302,11 +302,8 @@ type ProxyServer struct {
 	ResourceContainer      string
 	ConfigSyncPeriod       time.Duration
 	ServiceEventHandler    proxyconfig.ServiceHandler
-	// TODO: Migrate all handlers to ServiceHandler types and
-	// get rid of this one.
-	ServiceHandler        proxyconfig.ServiceConfigHandler
-	EndpointsEventHandler proxyconfig.EndpointsHandler
-	HealthzServer         *healthcheck.HealthzServer
+	EndpointsEventHandler  proxyconfig.EndpointsHandler
+	HealthzServer          *healthcheck.HealthzServer
 }
 
 // createClients creates a kube client and an event client from the given config and masterOverride.
@@ -397,9 +394,6 @@ func NewProxyServer(config *componentconfig.KubeProxyConfiguration, cleanupAndEx
 
 	var proxier proxy.ProxyProvider
 	var serviceEventHandler proxyconfig.ServiceHandler
-	// TODO: Migrate all handlers to ServiceHandler types and
-	// get rid of this one.
-	var serviceHandler proxyconfig.ServiceConfigHandler
 	var endpointsEventHandler proxyconfig.EndpointsHandler
 
 	proxyMode := getProxyMode(string(config.Mode), iptInterface, iptables.LinuxKernelCompatTester{})
@@ -517,7 +511,6 @@ func NewProxyServer(config *componentconfig.KubeProxyConfiguration, cleanupAndEx
 		ResourceContainer:      config.ResourceContainer,
 		ConfigSyncPeriod:       config.ConfigSyncPeriod.Duration,
 		ServiceEventHandler:    serviceEventHandler,
-		ServiceHandler:         serviceHandler,
 		EndpointsEventHandler:  endpointsEventHandler,
 		HealthzServer:          healthzServer,
 	}, nil
@@ -621,12 +614,7 @@ func (s *ProxyServer) Run() error {
 	// only notify on changes, and the initial update (on process start) may be lost if no handlers
 	// are registered yet.
 	serviceConfig := proxyconfig.NewServiceConfig(informerFactory.Core().InternalVersion().Services(), s.ConfigSyncPeriod)
-	if s.ServiceHandler != nil {
-		serviceConfig.RegisterHandler(s.ServiceHandler)
-	}
-	if s.ServiceEventHandler != nil {
-		serviceConfig.RegisterEventHandler(s.ServiceEventHandler)
-	}
+	serviceConfig.RegisterEventHandler(s.ServiceEventHandler)
 	go serviceConfig.Run(wait.NeverStop)
 
 	endpointsConfig := proxyconfig.NewEndpointsConfig(informerFactory.Core().InternalVersion().Endpoints(), s.ConfigSyncPeriod)

pkg/proxy/config/BUILD

@@ -21,7 +21,6 @@ go_library(
         "//pkg/client/listers/core/internalversion:go_default_library",
         "//pkg/controller:go_default_library",
         "//vendor/github.com/golang/glog:go_default_library",
-        "//vendor/k8s.io/apimachinery/pkg/labels:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/util/runtime:go_default_library",
         "//vendor/k8s.io/client-go/tools/cache:go_default_library",
     ],

pkg/proxy/config/config.go

@@ -21,7 +21,6 @@ import (
 	"time"
 
 	"github.com/golang/glog"
-	"k8s.io/apimachinery/pkg/labels"
 	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
 	"k8s.io/client-go/tools/cache"
 	"k8s.io/kubernetes/pkg/api"
@@ -30,22 +29,6 @@ import (
 	"k8s.io/kubernetes/pkg/controller"
 )
 
-// ServiceConfigHandler is an abstract interface of objects which receive update notifications for the set of services.
-// DEPRECATED: Use ServiceHandler instead - this will be removed soon.
-type ServiceConfigHandler interface {
-	// OnServiceUpdate gets called when a service is created, removed or changed
-	// on any of the configuration sources. An example is when a new service
-	// comes up.
-	//
-	// NOTE: For efficiency, services are being passed by reference, thus,
-	// OnServiceUpdate should NOT modify pointers of a given slice.
-	// Those service objects are shared with other layers of the system and
-	// are guaranteed to be immutable with the assumption that are also
-	// not mutated by those handlers. Make a deep copy if you need to modify
-	// them in your code.
-	OnServiceUpdate(services []*api.Service)
-}
-
 // ServiceHandler is an abstract interface of objects which receive
 // notifications about service object changes.
 type ServiceHandler interface {
@@ -185,11 +168,6 @@ type ServiceConfig struct {
 	lister        listers.ServiceLister
 	listerSynced  cache.InformerSynced
 	eventHandlers []ServiceHandler
-	// TODO: Remove as soon as we migrate everything to event handlers.
-	handlers []ServiceConfigHandler
-	// updates channel is used to trigger registered handlers
-	updates chan struct{}
-	stop    chan struct{}
 }
 
 // NewServiceConfig creates a new ServiceConfig.
@@ -197,12 +175,6 @@ func NewServiceConfig(serviceInformer coreinformers.ServiceInformer, resyncPerio
 	result := &ServiceConfig{
 		lister:       serviceInformer.Lister(),
 		listerSynced: serviceInformer.Informer().HasSynced,
-		// The updates channel is used to send interrupts to the Services handler.
-		// It's buffered because we never want to block for as long as there is a
-		// pending interrupt, but don't want to drop them if the handler is doing
-		// work.
-		updates: make(chan struct{}, 1),
-		stop:    make(chan struct{}),
 	}
 
 	serviceInformer.Informer().AddEventHandlerWithResyncPeriod(
@@ -217,12 +189,6 @@ func NewServiceConfig(serviceInformer coreinformers.ServiceInformer, resyncPerio
 	return result
 }
 
-// RegisterHandler registers a handler which is called on every services change.
-// DEPRECATED: Use RegisterEventHandler instead - this will be removed soon.
-func (c *ServiceConfig) RegisterHandler(handler ServiceConfigHandler) {
-	c.handlers = append(c.handlers, handler)
-}
-
 // RegisterEventHandler registers a handler which is called on every service change.
 func (c *ServiceConfig) RegisterEventHandler(handler ServiceHandler) {
 	c.eventHandlers = append(c.eventHandlers, handler)
@@ -240,40 +206,12 @@ func (c *ServiceConfig) Run(stopCh <-chan struct{}) {
 		return
 	}
 
-	// We have synced informers. Now we can start delivering updates
-	// to the registered handler.
 	for i := range c.eventHandlers {
 		glog.V(3).Infof("Calling handler.OnServiceSynced()")
 		c.eventHandlers[i].OnServiceSynced()
 	}
-	go func() {
-		defer utilruntime.HandleCrash()
-		for {
-			select {
-			case <-c.updates:
-				services, err := c.lister.List(labels.Everything())
-				if err != nil {
-					glog.Errorf("Error while listing services from cache: %v", err)
-					// This will cause a retry (if there isnt' any other trigger in-flight).
-					c.dispatchUpdate()
-					continue
-				}
-				if services == nil {
-					services = []*api.Service{}
-				}
-				for i := range c.handlers {
-					glog.V(3).Infof("Calling handler.OnServiceUpdate()")
-					c.handlers[i].OnServiceUpdate(services)
-				}
-			case <-c.stop:
-				return
-			}
-		}
-	}()
 
-	// Close updates channel when stopCh is closed.
 	<-stopCh
-	close(c.stop)
 }
 
 func (c *ServiceConfig) handleAddService(obj interface{}) {
@@ -286,7 +224,6 @@ func (c *ServiceConfig) handleAddService(obj interface{}) {
 		glog.V(4).Infof("Calling handler.OnServiceAdd")
 		c.eventHandlers[i].OnServiceAdd(service)
 	}
-	c.dispatchUpdate()
 }
 
 func (c *ServiceConfig) handleUpdateService(oldObj, newObj interface{}) {
@@ -304,7 +241,6 @@ func (c *ServiceConfig) handleUpdateService(oldObj, newObj interface{}) {
 		glog.V(4).Infof("Calling handler.OnServiceUpdate")
 		c.eventHandlers[i].OnServiceUpdate(oldService, service)
 	}
-	c.dispatchUpdate()
 }
 
 func (c *ServiceConfig) handleDeleteService(obj interface{}) {
@@ -324,16 +260,4 @@ func (c *ServiceConfig) handleDeleteService(obj interface{}) {
 		glog.V(4).Infof("Calling handler.OnServiceDelete")
 		c.eventHandlers[i].OnServiceDelete(service)
 	}
-	c.dispatchUpdate()
-}
-
-func (c *ServiceConfig) dispatchUpdate() {
-	select {
-	case c.updates <- struct{}{}:
-		// Work enqueued successfully
-	case <-c.stop:
-		// We're shut down / avoid logging the message below
-	default:
-		glog.V(4).Infof("Service handler already has a pending interrupt.")
-	}
 }