generic

Documentation

Overview

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

Index

• type AttrFunc
• 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 SelectionPredicate
  • func (s *SelectionPredicate) Matches(obj runtime.Object) (bool, error)
  • func (s *SelectionPredicate) MatchesSingle() (string, bool)

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 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 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) if and only if s.Field matches on the object's name.