Use the generic/typed workqueue throughout

This change makes us use the generic workqueue throughout the project in
order to improve type safety and readability of the code.

Kubernetes-commit: 6d0ac8c561a7ac66c21e4ee7bd1976c2ecedbf32

examples/workqueue/main.go

@@ -37,12 +37,12 @@ import (
 // Controller demonstrates how to implement a controller with client-go.
 type Controller struct {
 	indexer  cache.Indexer
-	queue    workqueue.RateLimitingInterface
+	queue    workqueue.TypedRateLimitingInterface[string]
 	informer cache.Controller
 }
 
 // NewController creates a new Controller.
-func NewController(queue workqueue.RateLimitingInterface, indexer cache.Indexer, informer cache.Controller) *Controller {
+func NewController(queue workqueue.TypedRateLimitingInterface[string], indexer cache.Indexer, informer cache.Controller) *Controller {
 	return &Controller{
 		informer: informer,
 		indexer:  indexer,
@@ -62,7 +62,7 @@ func (c *Controller) processNextItem() bool {
 	defer c.queue.Done(key)
 
 	// Invoke the method containing the business logic
-	err := c.syncToStdout(key.(string))
+	err := c.syncToStdout(key)
 	// Handle the error if something went wrong during the execution of the business logic
 	c.handleErr(err, key)
 	return true
@@ -90,7 +90,7 @@ func (c *Controller) syncToStdout(key string) error {
 }
 
 // handleErr checks if an error happened and makes sure we will retry later.
-func (c *Controller) handleErr(err error, key interface{}) {
+func (c *Controller) handleErr(err error, key string) {
 	if err == nil {
 		// Forget about the #AddRateLimited history of the key on every successful synchronization.
 		// This ensures that future processing of updates for this key is not delayed because of
@@ -168,7 +168,7 @@ func main() {
 	podListWatcher := cache.NewListWatchFromClient(clientset.CoreV1().RESTClient(), "pods", v1.NamespaceDefault, fields.Everything())
 
 	// create the workqueue
-	queue := workqueue.NewRateLimitingQueue(workqueue.DefaultControllerRateLimiter())
+	queue := workqueue.NewTypedRateLimitingQueue(workqueue.DefaultTypedControllerRateLimiter[string]())
 
 	// Bind the workqueue to a cache with the help of an informer. This way we make sure that
 	// whenever the cache is updated, the pod key is added to the workqueue.