quota

type Evaluator interface {
	// Constraints ensures that each required resource is present on item
	Constraints(required []api.ResourceName, item runtime.Object) error
	// Get returns the object with specified namespace and name
	Get(namespace, name string) (runtime.Object, error)
	// GroupKind returns the groupKind that this object knows how to evaluate
	GroupKind() unversioned.GroupKind
	// MatchesResources is the list of resources that this evaluator matches
	MatchesResources() []api.ResourceName
	// Matches returns true if the specified quota matches the input item
	Matches(resourceQuota *api.ResourceQuota, item runtime.Object) bool
	// OperationResources returns the set of resources that could be updated for the
	// specified operation for this kind.  If empty, admission control will ignore
	// quota processing for the operation.
	OperationResources(operation admission.Operation) []api.ResourceName
	// Usage returns the resource usage for the specified object
	Usage(object runtime.Object) api.ResourceList
	// UsageStats calculates latest observed usage stats for all objects
	UsageStats(options UsageStatsOptions) (UsageStats, error)
}

type Registry interface {
	// Evaluators returns the set Evaluator objects registered to a groupKind
	Evaluators() map[unversioned.GroupKind]Evaluator
}

type UsageStats struct {
	// Used maps resource to quantity used
	Used api.ResourceList
}

type UsageStatsOptions struct {
	// Namespace where stats should be calculate
	Namespace string
	// Scopes that must match counted objects
	Scopes []api.ResourceQuotaScope
}