refactor: remove usless options (#5671)

refactor: remove useless options

pkg/simple/client/cache/cache.go

@@ -39,13 +39,13 @@ type Interface interface {
 	// Set sets the value and living duration of the given key, zero duration means never expire
 	Set(key string, value string, duration time.Duration) error
 
-	// Del deletes the given key, no error returned if the key doesn't exists
+	// Del deletes the given key, no error returned if the key doesn't exist
 	Del(keys ...string) error
 
 	// Exists checks the existence of a give key
 	Exists(keys ...string) (bool, error)
 
-	// Expires updates object's expiration time, return err if key doesn't exist
+	// Expire updates object's expiration time, return err if key doesn't exist
 	Expire(key string, duration time.Duration) error
 }
 
@@ -60,6 +60,10 @@ func New(option *Options, stopCh <-chan struct{}) (Interface, error) {
 		return nil, err
 	}
 
+	if option.Type == TypeInMemoryCache {
+		klog.Warning("In-memory cache will be used, this may cause data inconsistencies when running with multiple replicas.")
+	}
+
 	cache, err := cacheFactories[option.Type].Create(option.Options, stopCh)
 	if err != nil {
 		klog.Errorf("failed to create cache, error: %v", err)

pkg/simple/client/cache/inmemory_cache.go

@@ -32,9 +32,7 @@ import (
 var ErrNoSuchKey = errors.New("no such key")
 
 const (
-	typeInMemoryCache = "InMemoryCache"
-	DefaultCacheType  = typeInMemoryCache
-
+	TypeInMemoryCache    = "InMemoryCache"
 	defaultCleanupPeriod = 2 * time.Hour
 )
 
@@ -176,12 +174,11 @@ type inMemoryCacheFactory struct {
 }
 
 func (sf *inMemoryCacheFactory) Type() string {
-	return typeInMemoryCache
+	return TypeInMemoryCache
 }
 
 func (sf *inMemoryCacheFactory) Create(options options.DynamicOptions, stopCh <-chan struct{}) (Interface, error) {
 	var sOptions InMemoryCacheOptions
-
 	decoder, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
 		DecodeHook:       mapstructure.StringToTimeDurationHookFunc(),
 		WeaklyTypedInput: true,

pkg/simple/client/cache/options.go

@@ -31,7 +31,7 @@ type Options struct {
 // because redis is not required for some components
 func NewCacheOptions() *Options {
 	return &Options{
-		Type:    "",
+		Type:    TypeInMemoryCache,
 		Options: map[string]interface{}{},
 	}
 }