generic

Documentation

Overview

Package generic provides a generic object store interface and a generic label/field matching type.

Index

• func FilterList(list runtime.Object, m Matcher, d DecoratorFunc) (filtered runtime.Object, err error)
• type AttrFunc
• type DecoratorFunc
• type Matcher
  • func MatchOnKey(key string, f func(obj runtime.Object) (bool, error)) Matcher
  • func MatcherFunc(f func(obj runtime.Object) (bool, error)) Matcher
• type Registry
• type SelectionPredicate
  • func (s *SelectionPredicate) Matches(obj runtime.Object) (bool, error)
  • func (s *SelectionPredicate) MatchesSingle() (string, bool)

Functions

func FilterList

func FilterList(list runtime.Object, m Matcher, d DecoratorFunc) (filtered runtime.Object, err error)

FilterList filters any list object that conforms to the api conventions, provided that 'm' works with the concrete type of list. d is an optional decorator for the returned functions. Only matching items are decorated.

Types

type AttrFunc

type AttrFunc func(obj runtime.Object) (label labels.Set, field fields.Set, err error)

AttrFunc returns label and field sets for List or Watch to compare against, or an error.

type DecoratorFunc

type DecoratorFunc func(obj runtime.Object) error

DecoratorFunc can mutate the provided object prior to being returned.

type Matcher

type Matcher interface {
	// Matches should return true if obj matches this matcher's requirements.
	Matches(obj runtime.Object) (matchesThisObject bool, err error)

	// If this matcher matches a single object, return the key for that
	// object and true here. This will greatly increase efficiency. You
	// must still implement Matches(). Note that key does NOT need to
	// include the object's namespace.
	MatchesSingle() (key string, matchesSingleObject bool)
}

Matcher can return true if an object matches the Matcher's selection criteria. If it is known that the matcher will match only a single object then MatchesSingle should return the key of that object and true. This is an optimization only--Matches() should continue to work.

func MatchOnKey

func MatchOnKey(key string, f func(obj runtime.Object) (bool, error)) Matcher

MatchOnKey returns a matcher that will send only the object matching key through the matching function f. For testing! Note: use SelectionPredicate above for real code!

func MatcherFunc

func MatcherFunc(f func(obj runtime.Object) (bool, error)) Matcher

MatcherFunc makes a matcher from the provided function. For easy definition of matchers for testing. Note: use SelectionPredicate above for real code!

type Registry

type Registry interface {
	ListPredicate(api.Context, Matcher) (runtime.Object, error)
	CreateWithName(ctx api.Context, id string, obj runtime.Object) error
	UpdateWithName(ctx api.Context, id string, obj runtime.Object) error
	Get(ctx api.Context, id string) (runtime.Object, error)
	Delete(ctx api.Context, id string, options *api.DeleteOptions) (runtime.Object, error)
	WatchPredicate(ctx api.Context, m Matcher, resourceVersion string) (watch.Interface, error)
}

Registry knows how to store & list any runtime.Object. Can be used for any object types which don't require special features from the storage layer. DEPRECATED: replace with direct implementation of RESTStorage

type SelectionPredicate

type SelectionPredicate struct {
	Label    labels.Selector
	Field    fields.Selector
	GetAttrs AttrFunc
}

SelectionPredicate implements a generic predicate that can be passed to GenericRegistry's List or Watch methods. Implements the Matcher interface.

func (*SelectionPredicate) Matches

func (s *SelectionPredicate) Matches(obj runtime.Object) (bool, error)

Matches returns true if the given object's labels and fields (as returned by s.GetAttrs) match s.Label and s.Field. An error is returned if s.GetAttrs fails.

func (*SelectionPredicate) MatchesSingle

func (s *SelectionPredicate) MatchesSingle() (string, bool)

MatchesSingle will return (name, true) iff s.Field matches on the object's name.