Drafting ctl controller

clitools/pkg/generated/informers/externalversions/factory.go

@@ -0,0 +1,249 @@
+/* MIT License */
+
+// Code generated by informer-gen. DO NOT EDIT.
+
+package externalversions
+
+import (
+	reflect "reflect"
+	sync "sync"
+	time "time"
+
+	versioned "example.com/monok8s/pkg/generated/clientset/versioned"
+	internalinterfaces "example.com/monok8s/pkg/generated/informers/externalversions/internalinterfaces"
+	monok8s "example.com/monok8s/pkg/generated/informers/externalversions/monok8s"
+	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	runtime "k8s.io/apimachinery/pkg/runtime"
+	schema "k8s.io/apimachinery/pkg/runtime/schema"
+	cache "k8s.io/client-go/tools/cache"
+)
+
+// SharedInformerOption defines the functional option type for SharedInformerFactory.
+type SharedInformerOption func(*sharedInformerFactory) *sharedInformerFactory
+
+type sharedInformerFactory struct {
+	client           versioned.Interface
+	namespace        string
+	tweakListOptions internalinterfaces.TweakListOptionsFunc
+	lock             sync.Mutex
+	defaultResync    time.Duration
+	customResync     map[reflect.Type]time.Duration
+	transform        cache.TransformFunc
+
+	informers map[reflect.Type]cache.SharedIndexInformer
+	// startedInformers is used for tracking which informers have been started.
+	// This allows Start() to be called multiple times safely.
+	startedInformers map[reflect.Type]bool
+	// wg tracks how many goroutines were started.
+	wg sync.WaitGroup
+	// shuttingDown is true when Shutdown has been called. It may still be running
+	// because it needs to wait for goroutines.
+	shuttingDown bool
+}
+
+// WithCustomResyncConfig sets a custom resync period for the specified informer types.
+func WithCustomResyncConfig(resyncConfig map[v1.Object]time.Duration) SharedInformerOption {
+	return func(factory *sharedInformerFactory) *sharedInformerFactory {
+		for k, v := range resyncConfig {
+			factory.customResync[reflect.TypeOf(k)] = v
+		}
+		return factory
+	}
+}
+
+// WithTweakListOptions sets a custom filter on all listers of the configured SharedInformerFactory.
+func WithTweakListOptions(tweakListOptions internalinterfaces.TweakListOptionsFunc) SharedInformerOption {
+	return func(factory *sharedInformerFactory) *sharedInformerFactory {
+		factory.tweakListOptions = tweakListOptions
+		return factory
+	}
+}
+
+// WithNamespace limits the SharedInformerFactory to the specified namespace.
+func WithNamespace(namespace string) SharedInformerOption {
+	return func(factory *sharedInformerFactory) *sharedInformerFactory {
+		factory.namespace = namespace
+		return factory
+	}
+}
+
+// WithTransform sets a transform on all informers.
+func WithTransform(transform cache.TransformFunc) SharedInformerOption {
+	return func(factory *sharedInformerFactory) *sharedInformerFactory {
+		factory.transform = transform
+		return factory
+	}
+}
+
+// NewSharedInformerFactory constructs a new instance of sharedInformerFactory for all namespaces.
+func NewSharedInformerFactory(client versioned.Interface, defaultResync time.Duration) SharedInformerFactory {
+	return NewSharedInformerFactoryWithOptions(client, defaultResync)
+}
+
+// NewFilteredSharedInformerFactory constructs a new instance of sharedInformerFactory.
+// Listers obtained via this SharedInformerFactory will be subject to the same filters
+// as specified here.
+//
+// Deprecated: Please use NewSharedInformerFactoryWithOptions instead
+func NewFilteredSharedInformerFactory(client versioned.Interface, defaultResync time.Duration, namespace string, tweakListOptions internalinterfaces.TweakListOptionsFunc) SharedInformerFactory {
+	return NewSharedInformerFactoryWithOptions(client, defaultResync, WithNamespace(namespace), WithTweakListOptions(tweakListOptions))
+}
+
+// NewSharedInformerFactoryWithOptions constructs a new instance of a SharedInformerFactory with additional options.
+func NewSharedInformerFactoryWithOptions(client versioned.Interface, defaultResync time.Duration, options ...SharedInformerOption) SharedInformerFactory {
+	factory := &sharedInformerFactory{
+		client:           client,
+		namespace:        v1.NamespaceAll,
+		defaultResync:    defaultResync,
+		informers:        make(map[reflect.Type]cache.SharedIndexInformer),
+		startedInformers: make(map[reflect.Type]bool),
+		customResync:     make(map[reflect.Type]time.Duration),
+	}
+
+	// Apply all options
+	for _, opt := range options {
+		factory = opt(factory)
+	}
+
+	return factory
+}
+
+func (f *sharedInformerFactory) Start(stopCh <-chan struct{}) {
+	f.lock.Lock()
+	defer f.lock.Unlock()
+
+	if f.shuttingDown {
+		return
+	}
+
+	for informerType, informer := range f.informers {
+		if !f.startedInformers[informerType] {
+			f.wg.Add(1)
+			// We need a new variable in each loop iteration,
+			// otherwise the goroutine would use the loop variable
+			// and that keeps changing.
+			informer := informer
+			go func() {
+				defer f.wg.Done()
+				informer.Run(stopCh)
+			}()
+			f.startedInformers[informerType] = true
+		}
+	}
+}
+
+func (f *sharedInformerFactory) Shutdown() {
+	f.lock.Lock()
+	f.shuttingDown = true
+	f.lock.Unlock()
+
+	// Will return immediately if there is nothing to wait for.
+	f.wg.Wait()
+}
+
+func (f *sharedInformerFactory) WaitForCacheSync(stopCh <-chan struct{}) map[reflect.Type]bool {
+	informers := func() map[reflect.Type]cache.SharedIndexInformer {
+		f.lock.Lock()
+		defer f.lock.Unlock()
+
+		informers := map[reflect.Type]cache.SharedIndexInformer{}
+		for informerType, informer := range f.informers {
+			if f.startedInformers[informerType] {
+				informers[informerType] = informer
+			}
+		}
+		return informers
+	}()
+
+	res := map[reflect.Type]bool{}
+	for informType, informer := range informers {
+		res[informType] = cache.WaitForCacheSync(stopCh, informer.HasSynced)
+	}
+	return res
+}
+
+// InformerFor returns the SharedIndexInformer for obj using an internal
+// client.
+func (f *sharedInformerFactory) InformerFor(obj runtime.Object, newFunc internalinterfaces.NewInformerFunc) cache.SharedIndexInformer {
+	f.lock.Lock()
+	defer f.lock.Unlock()
+
+	informerType := reflect.TypeOf(obj)
+	informer, exists := f.informers[informerType]
+	if exists {
+		return informer
+	}
+
+	resyncPeriod, exists := f.customResync[informerType]
+	if !exists {
+		resyncPeriod = f.defaultResync
+	}
+
+	informer = newFunc(f.client, resyncPeriod)
+	informer.SetTransform(f.transform)
+	f.informers[informerType] = informer
+
+	return informer
+}
+
+// SharedInformerFactory provides shared informers for resources in all known
+// API group versions.
+//
+// It is typically used like this:
+//
+//	ctx, cancel := context.WithCancel(context.Background())
+//	defer cancel()
+//	factory := NewSharedInformerFactory(client, resyncPeriod)
+//	defer factory.WaitForStop()    // Returns immediately if nothing was started.
+//	genericInformer := factory.ForResource(resource)
+//	typedInformer := factory.SomeAPIGroup().V1().SomeType()
+//	factory.Start(ctx.Done())          // Start processing these informers.
+//	synced := factory.WaitForCacheSync(ctx.Done())
+//	for v, ok := range synced {
+//	    if !ok {
+//	        fmt.Fprintf(os.Stderr, "caches failed to sync: %v", v)
+//	        return
+//	    }
+//	}
+//
+//	// Creating informers can also be created after Start, but then
+//	// Start must be called again:
+//	anotherGenericInformer := factory.ForResource(resource)
+//	factory.Start(ctx.Done())
+type SharedInformerFactory interface {
+	internalinterfaces.SharedInformerFactory
+
+	// Start initializes all requested informers. They are handled in goroutines
+	// which run until the stop channel gets closed.
+	// Warning: Start does not block. When run in a go-routine, it will race with a later WaitForCacheSync.
+	Start(stopCh <-chan struct{})
+
+	// Shutdown marks a factory as shutting down. At that point no new
+	// informers can be started anymore and Start will return without
+	// doing anything.
+	//
+	// In addition, Shutdown blocks until all goroutines have terminated. For that
+	// to happen, the close channel(s) that they were started with must be closed,
+	// either before Shutdown gets called or while it is waiting.
+	//
+	// Shutdown may be called multiple times, even concurrently. All such calls will
+	// block until all goroutines have terminated.
+	Shutdown()
+
+	// WaitForCacheSync blocks until all started informers' caches were synced
+	// or the stop channel gets closed.
+	WaitForCacheSync(stopCh <-chan struct{}) map[reflect.Type]bool
+
+	// ForResource gives generic access to a shared informer of the matching type.
+	ForResource(resource schema.GroupVersionResource) (GenericInformer, error)
+
+	// InformerFor returns the SharedIndexInformer for obj using an internal
+	// client.
+	InformerFor(obj runtime.Object, newFunc internalinterfaces.NewInformerFunc) cache.SharedIndexInformer
+
+	Monok8s() monok8s.Interface
+}
+
+func (f *sharedInformerFactory) Monok8s() monok8s.Interface {
+	return monok8s.New(f, f.namespace, f.tweakListOptions)
+}