cacher

package
Version: v1.14.6 Latest Latest
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Published: Aug 16, 2019 License: Apache-2.0, Apache-2.0 Imports: 26 Imported by: 0

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Types

type Cacher

type Cacher struct {
	sync.RWMutex
	// contains filtered or unexported fields
}

Cacher is responsible for serving WATCH and LIST requests for a given resource from its internal cache and updating its cache in the background based on the underlying storage contents. Cacher implements storage.Interface (although most of the calls are just delegated to the underlying storage).

func NewCacherFromConfig

func NewCacherFromConfig(config Config) *Cacher

NewCacherFromConfig creates a new Cacher responsible for servicing WATCH and LIST requests from its internal cache and updating its cache in the background based on the given configuration.

func (*Cacher) Count

func (c *Cacher) Count(pathPrefix string) (int64, error)

Count implements storage.Interface.

func (*Cacher) Create

func (c *Cacher) Create(ctx context.Context, key string, obj, out runtime.Object, ttl uint64) error

Create implements storage.Interface.

func (*Cacher) Delete

func (c *Cacher) Delete(ctx context.Context, key string, out runtime.Object, preconditions *storage.Preconditions) error

Delete implements storage.Interface.

func (*Cacher) Get

func (c *Cacher) Get(ctx context.Context, key string, resourceVersion string, objPtr runtime.Object, ignoreNotFound bool) error

Get implements storage.Interface.

func (*Cacher) GetToList

func (c *Cacher) GetToList(ctx context.Context, key string, resourceVersion string, pred storage.SelectionPredicate, listObj runtime.Object) error

GetToList implements storage.Interface.

func (*Cacher) GuaranteedUpdate

func (c *Cacher) GuaranteedUpdate(
	ctx context.Context, key string, ptrToType runtime.Object, ignoreNotFound bool,
	preconditions *storage.Preconditions, tryUpdate storage.UpdateFunc, _ ...runtime.Object) error

GuaranteedUpdate implements storage.Interface.

func (*Cacher) LastSyncResourceVersion

func (c *Cacher) LastSyncResourceVersion() (uint64, error)

LastSyncResourceVersion returns resource version to which the underlying cache is synced.

func (*Cacher) List

func (c *Cacher) List(ctx context.Context, key string, resourceVersion string, pred storage.SelectionPredicate, listObj runtime.Object) error

List implements storage.Interface.

func (*Cacher) Stop

func (c *Cacher) Stop()

Stop implements the graceful termination.

func (*Cacher) Versioner

func (c *Cacher) Versioner() storage.Versioner

Versioner implements storage.Interface.

func (*Cacher) Watch

func (c *Cacher) Watch(ctx context.Context, key string, resourceVersion string, pred storage.SelectionPredicate) (watch.Interface, error)

Watch implements storage.Interface.

func (*Cacher) WatchList

func (c *Cacher) WatchList(ctx context.Context, key string, resourceVersion string, pred storage.SelectionPredicate) (watch.Interface, error)

WatchList implements storage.Interface.

type Config

type Config struct {
	// Maximum size of the history cached in memory.
	CacheCapacity int

	// An underlying storage.Interface.
	Storage storage.Interface

	// An underlying storage.Versioner.
	Versioner storage.Versioner

	// The Cache will be caching objects of a given Type and assumes that they
	// are all stored under ResourcePrefix directory in the underlying database.
	Type           interface{}
	ResourcePrefix string

	// KeyFunc is used to get a key in the underlying storage for a given object.
	KeyFunc func(runtime.Object) (string, error)

	// GetAttrsFunc is used to get object labels, fields
	GetAttrsFunc func(runtime.Object) (label labels.Set, field fields.Set, err error)

	// TriggerPublisherFunc is used for optimizing amount of watchers that
	// needs to process an incoming event.
	TriggerPublisherFunc storage.TriggerPublisherFunc

	// NewList is a function that creates new empty object storing a list of
	// objects of type Type.
	NewListFunc func() runtime.Object

	Codec runtime.Codec
}

Config contains the configuration for a given Cache.

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